{% extends "shared/frontend/base.html" %}

{% block title %}Kunde Detaljer - BMC Hub{% endblock %}

{% block extra_css %}
<style>
    .customer-header {
        background: var(--accent);
        color: white;
        padding: 3rem 2rem;
        border-radius: 12px;
        margin-bottom: 2rem;
    }
    
    .customer-avatar-large {
        width: 80px;
        height: 80px;
        border-radius: 16px;
        background: rgba(255, 255, 255, 0.2);
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        font-size: 2rem;
        border: 3px solid rgba(255, 255, 255, 0.3);
    }
    
    .nav-pills-vertical {
        border-right: 1px solid rgba(0, 0, 0, 0.1);
        padding-right: 0;
    }
    
    .nav-pills-vertical .nav-link {
        color: var(--text-secondary);
        border-radius: 8px 0 0 8px;
        padding: 1rem 1.5rem;
        font-weight: 500;
        margin-bottom: 0.5rem;
        transition: all 0.2s;
        text-align: left;
    }
    
    .nav-pills-vertical .nav-link:hover {
        background: var(--accent-light);
        color: var(--accent);
    }
    
    .nav-pills-vertical .nav-link.active {
        background: var(--accent);
        color: white;
    }
    
    .nav-pills-vertical .nav-link i {
        width: 20px;
        margin-right: 0.75rem;
    }
    
    .info-card {
        background: var(--bg-card);
        border: 1px solid rgba(0, 0, 0, 0.1);
        border-radius: 12px;
        padding: 1.5rem;
    }

    .acmp-stat-card {
        background: var(--bg-card);
        border: 1px solid rgba(15, 76, 117, 0.14);
        border-radius: 12px;
        padding: 1rem;
    }

    .acmp-stat-label {
        color: var(--text-secondary);
        font-size: 0.85rem;
    }

    .acmp-stat-value {
        font-size: 1.2rem;
        font-weight: 700;
        color: var(--text-primary);
    }

    .internet-stat-card {
        background: linear-gradient(180deg, rgba(15, 76, 117, 0.04), rgba(15, 76, 117, 0.01));
        border: 1px solid rgba(15, 76, 117, 0.14);
        border-radius: 14px;
        padding: 1rem;
        height: 100%;
    }

    .internet-stat-label {
        color: var(--text-secondary);
        font-size: 0.78rem;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        margin-bottom: 0.35rem;
    }

    .internet-stat-value {
        color: var(--text-primary);
        font-size: 1.4rem;
        font-weight: 700;
    }

    .internet-shell {
        background: linear-gradient(180deg, rgba(15, 76, 117, 0.05), rgba(255, 255, 255, 0));
        border: 1px solid rgba(15, 76, 117, 0.12);
        border-radius: 18px;
        padding: 1.25rem;
    }

    .internet-connection-card {
        border: 1px solid rgba(15, 76, 117, 0.12);
        border-radius: 16px;
        background: var(--bg-card);
        padding: 1rem;
        box-shadow: 0 10px 24px rgba(15, 76, 117, 0.06);
    }

    .internet-connection-card + .internet-connection-card {
        margin-top: 0.9rem;
    }

    .internet-meta-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 0.75rem;
    }

    .internet-meta-item {
        background: rgba(15, 76, 117, 0.04);
        border-radius: 12px;
        padding: 0.75rem;
    }

    .internet-meta-item .label {
        display: block;
        color: var(--text-secondary);
        font-size: 0.74rem;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        margin-bottom: 0.25rem;
    }

    .internet-meta-item .value {
        color: var(--text-primary);
        font-weight: 600;
    }

    .internet-status-pill {
        display: inline-flex;
        align-items: center;
        gap: 0.35rem;
        border-radius: 999px;
        padding: 0.35rem 0.7rem;
        font-size: 0.75rem;
        font-weight: 700;
        letter-spacing: 0.04em;
        text-transform: uppercase;
    }

    .internet-status-active {
        background: rgba(25, 135, 84, 0.12);
        color: #146c43;
    }

    .internet-status-inactive {
        background: rgba(108, 117, 125, 0.14);
        color: #495057;
    }

    .internet-status-pending, .internet-status-planned {
        background: rgba(255, 193, 7, 0.18);
        color: #997404;
    }

    .internet-status-terminated, .internet-status-cancelled {
        background: rgba(220, 53, 69, 0.12);
        color: #b02a37;
    }

    .internet-create-panel {
        border: 1px dashed rgba(15, 76, 117, 0.22);
        border-radius: 16px;
        background: rgba(15, 76, 117, 0.03);
        padding: 1rem;
    }
    
    .info-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }
    
    .info-row:last-child {
        border-bottom: none;
    }
    
    .info-label {
        font-weight: 500;
        color: var(--text-secondary);
    }
    
    .info-value {
        color: var(--text-primary);
        font-weight: 500;
    }
    
    .contact-card {
        background: var(--bg-card);
        border: 1px solid rgba(0, 0, 0, 0.1);
        border-radius: 12px;
        padding: 1.5rem;
        transition: all 0.2s;
    }
    
    .contact-card:hover {
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-2px);
    }

    .session-card {
        background: var(--bg-card);
        border: 1px solid rgba(0, 0, 0, 0.1);
        border-radius: 12px;
        padding: 1rem;
    }

    .session-meta {
        font-size: 0.9rem;
        color: var(--text-secondary);
    }
    
    .activity-item {
        padding: 1.5rem;
        border-left: 3px solid var(--accent-light);
        margin-left: 1rem;
        position: relative;
    }
    
    .subscription-item {
        transition: all 0.3s ease;
        cursor: pointer;
    }
    
    .subscription-item:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12) !important;
    }
    
    .subscription-item.expanded {
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15) !important;
        border-color: var(--accent) !important;
    }
    
    .subscription-column {
        min-height: 200px;
    }
    
    .column-header {
        position: sticky;
        top: 0;
        z-index: 10;
        background: white;
        padding: 1rem;
        margin: -1rem -1rem 1rem -1rem;
        border-radius: 8px 8px 0 0;
    }
    
    .line-item-details {
        background: rgba(0, 0, 0, 0.02);
        border-radius: 6px;
        padding: 0.5rem;
    }
    
    .expandable-item {
        transition: all 0.2s;
    }
    
    .expandable-item:hover {
        background: rgba(0, 0, 0, 0.02);
    }
    
    .chevron-icon {
        transition: transform 0.2s;
    }
    
    .activity-item::before {
        content: '';
        position: absolute;
        left: -8px;
        top: 1.5rem;
        width: 12px;
        height: 12px;
        background: var(--accent);
        border-radius: 50%;
        border: 3px solid var(--bg-body);
    }
    
    /* Enhanced Edit Button */
    .btn-edit-customer {
        background: linear-gradient(135deg, #0f4c75 0%, #1a5f8e 100%);
        color: white;
        border: none;
        padding: 0.75rem 1.75rem;
        border-radius: 10px;
        font-weight: 600;
        letter-spacing: 0.3px;
        box-shadow: 0 4px 15px rgba(15, 76, 117, 0.3);
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        position: relative;
        overflow: hidden;
    }
    
    .btn-edit-customer::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
        transition: left 0.5s;
    }
    
    .btn-edit-customer:hover {
        background: linear-gradient(135deg, #1a5f8e 0%, #0f4c75 100%);
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(15, 76, 117, 0.4);
        color: white;
    }
    
    .btn-edit-customer:hover::before {
        left: 100%;
    }
    
    .btn-edit-customer:active {
        transform: translateY(0);
        box-shadow: 0 2px 8px rgba(15, 76, 117, 0.3);
    }
    
    .btn-edit-customer i {
        transition: transform 0.3s;
    }
    
    .btn-edit-customer:hover i {
        transform: rotate(-15deg) scale(1.1);
    }

    .contacts-panel {
        background: var(--bg-card);
        border: 1px solid rgba(15, 76, 117, 0.14);
        border-radius: 14px;
        overflow: hidden;
        box-shadow: 0 10px 28px rgba(15, 76, 117, 0.08);
    }

    .contacts-toolbar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 0.65rem;
        margin-bottom: 0.9rem;
        padding: 0.78rem 0.9rem;
        background: linear-gradient(135deg, rgba(15, 76, 117, 0.08) 0%, rgba(15, 76, 117, 0.02) 100%);
        border: 1px solid rgba(15, 76, 117, 0.12);
        border-radius: 12px;
    }

    .contacts-search {
        max-width: 460px;
        min-width: 280px;
    }

    .contacts-search .form-control,
    .contacts-search .input-group-text {
        border-color: rgba(15, 76, 117, 0.2);
    }

    .contacts-table {
        margin-bottom: 0;
    }

    .contacts-table thead th {
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        background: rgba(15, 76, 117, 0.06);
        color: var(--text-secondary);
        font-size: 0.78rem;
        font-weight: 700;
        letter-spacing: 0.06em;
        text-transform: uppercase;
        white-space: nowrap;
        padding: 0.82rem 0.8rem;
    }

    .contacts-table tbody td {
        border-color: rgba(0, 0, 0, 0.06);
        padding: 0.85rem 0.8rem;
    }

    .contacts-table .contact-name {
        font-weight: 600;
        color: var(--text-primary);
    }

    .contacts-table .contact-name-link {
        color: var(--text-primary);
        text-decoration: none;
        border-bottom: 1px solid transparent;
        transition: color 0.15s ease, border-color 0.15s ease;
    }

    .contacts-table .contact-name-link:hover {
        color: var(--accent);
        border-color: rgba(15, 76, 117, 0.35);
    }

    .contacts-table .contact-email a {
        overflow-wrap: anywhere;
    }

    .contacts-table .contact-number {
        white-space: nowrap;
    }

    .contacts-table .contact-phone-wrap,
    .contacts-table .contact-mobile-wrap {
        display: inline-flex;
        align-items: center;
        gap: 0.45rem;
        flex-wrap: wrap;
    }

    .contacts-table .btn-voip {
        border-color: rgba(25, 135, 84, 0.6);
        color: #198754;
    }

    .contacts-table .contact-phone-wrap .btn,
    .contacts-table .contact-mobile-wrap .btn {
        padding: 0.18rem 0.52rem;
        line-height: 1.2;
    }

    .contacts-table .primary-pill {
        font-size: 0.72rem;
        font-weight: 700;
    }

    .consistency-contact-comparison {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.75rem;
        margin-top: 0.75rem;
    }

    .consistency-contact-box {
        border: 1px solid rgba(15, 76, 117, 0.14);
        border-radius: 10px;
        padding: 0.75rem;
        background: rgba(15, 76, 117, 0.03);
    }

    .consistency-contact-box--new {
        border-color: rgba(25, 135, 84, 0.24);
        background: rgba(25, 135, 84, 0.05);
    }

    .consistency-contact-box-title {
        font-size: 0.74rem;
        font-weight: 700;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        color: var(--text-secondary);
        margin-bottom: 0.45rem;
    }

    .consistency-contact-line {
        font-size: 0.9rem;
        margin-bottom: 0.3rem;
    }

    .consistency-contact-line:last-child {
        margin-bottom: 0;
    }

    .consistency-contact-line-label {
        color: var(--text-secondary);
        font-weight: 600;
        margin-right: 0.35rem;
    }

    .consistency-diff-list {
        margin-top: 0.6rem;
        padding-top: 0.6rem;
        border-top: 1px dashed rgba(15, 76, 117, 0.14);
    }

    .consistency-diff-row {
        display: grid;
        grid-template-columns: 140px 1fr 1fr;
        gap: 0.6rem;
        font-size: 0.86rem;
        margin-bottom: 0.35rem;
    }

    .consistency-diff-row:last-child {
        margin-bottom: 0;
    }

    .consistency-diff-field {
        font-weight: 600;
        color: var(--text-secondary);
    }

    .consistency-diff-old {
        color: #8b1e3f;
    }

    .consistency-diff-new {
        color: #146c43;
    }

    @media (max-width: 992px) {
        .contacts-toolbar {
            padding: 0.7rem;
        }

        .contacts-search {
            max-width: none;
            min-width: 0;
            width: 100%;
        }

        #contactsContainer {
            min-width: 920px;
        }

        .consistency-contact-comparison,
        .consistency-diff-row {
            grid-template-columns: 1fr;
        }
    }
</style>
{% endblock %}

{% block content %}
    <!-- Customer Header -->
    <div class="customer-header">
        <div class="d-flex justify-content-between align-items-start">
            <div class="d-flex align-items-center">
                <div class="customer-avatar-large me-4" id="customerAvatar">?</div>
                <div>
                    <h1 class="fw-bold mb-2" id="customerName">Loading...</h1>
                    <div class="d-flex gap-3 align-items-center flex-wrap">
                        <span id="customerCity"></span>
                        <span class="badge bg-white bg-opacity-20" id="customerStatus"></span>
                        <span class="badge bg-white bg-opacity-20" id="customerSource"></span>
                        <span id="bmcLockedBadge"></span>
                    </div>
                </div>
            </div>
            <div class="d-flex gap-2">
                <a class="btn btn-light btn-sm" href="/links?customer_id={{ customer_id }}" title="Se links/endpoints for denne kunde">
                    <i class="bi bi-link-45deg me-2"></i>Links
                </a>
                <button class="btn btn-warning btn-sm" onclick="openAlertNoteForm('customer', customerId)" title="Opret vigtig information/advarsel om denne kunde">
                    <i class="bi bi-exclamation-triangle-fill me-2"></i>Alert Note
                </button>
                <button class="btn btn-edit-customer" onclick="editCustomer()">
                    <i class="bi bi-pencil-square me-2"></i>Rediger Kunde
                </button>
                <button class="btn btn-light btn-sm" onclick="window.location.href='/customers'">
                    <i class="bi bi-arrow-left me-2"></i>Tilbage
                </button>
            </div>
        </div>
    </div>

    <!-- Alert Notes Container -->
    <div id="alert-notes-container"></div>

    <!-- Bankruptcy Alert -->
    <div id="bankruptcyAlert" class="alert alert-danger d-flex align-items-center mb-4 d-none border-0 shadow-sm" role="alert" style="background-color: #ffeaea; color: #842029;">
        <i class="bi bi-shield-exclamation flex-shrink-0 me-3 fs-2 animate__animated animate__pulse animate__infinite"></i>
        <div class="flex-grow-1">
            <h5 class="alert-heading mb-1 fw-bold">⚠️ KONKURS ALARM</h5>
            <div>Der er registreret en aktiv konkurs-notifikation på denne kunde. Stop levering og kontakt bogholderiet.</div>
            <div class="mt-2 small">
                <strong>Emne:</strong> <span id="bankruptcySubject" class="fst-italic"></span><br>
                <strong>Modtaget:</strong> <span id="bankruptcyDate"></span>
            </div>
        </div>
        <div>
            <a id="bankruptcyLink" href="#" class="btn btn-sm btn-danger px-3">Se Email <i class="bi bi-arrow-right ms-1"></i></a>
        </div>
    </div>

    <!-- Data Consistency Alert -->
    <div id="consistencyAlert" class="alert alert-warning alert-dismissible fade show d-none mt-4" role="alert">
        <div class="d-flex align-items-center">
            <i class="bi bi-exclamation-triangle-fill fs-4 me-3"></i>
            <div class="flex-grow-1">
                <strong>Data Uoverensstemmelser Fundet!</strong>
                <p class="mb-0">
                    Der er <span id="discrepancyCount" class="fw-bold">0</span> felter med forskellige værdier mellem BMC Hub, vTiger og e-conomic.
                </p>
            </div>
            <button type="button" class="btn btn-warning ms-3" onclick="showConsistencyModal()">
                <i class="bi bi-search me-2"></i>Sammenlign
            </button>
        </div>
        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
    </div>

    <!-- Content Layout with Sidebar Navigation -->
    <div class="row">
        <div class="col-lg-3 col-md-4">
            <!-- Vertical Navigation -->
            <ul class="nav nav-pills nav-pills-vertical flex-column" role="tablist">
                <li class="nav-item">
                    <a class="nav-link active" data-bs-toggle="tab" href="#overview">
                        <i class="bi bi-info-circle"></i>Oversigt
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#contacts">
                        <i class="bi bi-people"></i>Kontakter
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#cases">
                        <i class="bi bi-list-check"></i>Sager
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#kontakt">
                        <i class="bi bi-chat-left-text"></i>Kontakt
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#invoices">
                        <i class="bi bi-receipt"></i>Fakturaer
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#subscriptions">
                        <i class="bi bi-arrow-repeat"></i>Abonnnents tjek
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#pipeline">
                        <i class="bi bi-diagram-3"></i>Kunde pipeline
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#billing-matrix">
                        <i class="bi bi-table"></i>Abonnements Matrix
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#acmp">
                        <i class="bi bi-cloud"></i>ACMP
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#locations">
                        <i class="bi bi-geo-alt"></i>Lokationer
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#internet-connections">
                        <i class="bi bi-hdd-network"></i>Internet
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#hardware">
                        <i class="bi bi-hdd"></i>Hardware
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#links">
                        <i class="bi bi-link-45deg"></i>Links
                    </a>
                </li>
                <li class="nav-item d-none" id="nextcloudTabNav">
                    <a class="nav-link" data-bs-toggle="tab" href="#nextcloud">
                        <i class="bi bi-cloud"></i>Nextcloud
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#remote-sessions">
                        <i class="bi bi-display"></i>Remote Sessions
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#activity">
                        <i class="bi bi-clock-history"></i>Aktivitet
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#conversations">
                        <i class="bi bi-mic"></i>Samtaler
                    </a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" data-bs-toggle="tab" href="#drift">
                        <i class="bi bi-broadcast"></i>Drift
                    </a>
                </li>
            </ul>
        </div>
        
        <div class="col-lg-9 col-md-8">
            <!-- Tab Content -->
            <div class="tab-content">
        <!-- Overview Tab -->
        <div class="tab-pane fade show active" id="overview">
            <div class="row g-4">
                <div class="col-lg-6">
                    <div class="info-card">
                        <h5 class="fw-bold mb-4">Virksomhedsoplysninger</h5>
                        <div class="info-row">
                            <span class="info-label">CVR-nummer</span>
                            <span class="info-value" id="cvrNumber">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Adresse</span>
                            <span class="info-value" id="address">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Postnummer & By</span>
                            <span class="info-value" id="postalCity">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Email</span>
                            <span class="info-value" id="email">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Telefon</span>
                            <span class="info-value" id="phone">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Hjemmeside</span>
                            <span class="info-value" id="website">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Kunde Wiki</span>
                            <span class="info-value" id="wikiLink">-</span>
                        </div>
                    </div>
                </div>
                
                <div class="col-lg-6">
                    <div class="info-card">
                        <h5 class="fw-bold mb-4">Økonomiske Oplysninger</h5>
                        <div class="info-row">
                            <span class="info-label">e-conomic Kundenr.</span>
                            <span class="info-value" id="economicNumber">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Betalingsbetingelser</span>
                            <span class="info-value" id="paymentTerms">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Moms Zone</span>
                            <span class="info-value" id="vatZone">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Valuta</span>
                            <span class="info-value" id="currency">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">EAN-nummer</span>
                            <span class="info-value" id="ean">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Standard avance</span>
                            <span class="info-value" id="standardMarginPercent">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Standard timepris</span>
                            <span class="info-value" id="standardHourlyRate">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Særlig fragtpris</span>
                            <span class="info-value" id="specialFreightPrice">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Leverandørservice</span>
                            <span class="info-value" id="supplierServiceEnrolled">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Faktureringsgebyr</span>
                            <span class="info-value" id="invoiceFeeAmount">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Spærret</span>
                            <span class="info-value" id="barred">-</span>
                        </div>
                    </div>
                </div>
                
                <div class="col-12">
                    <div class="info-card">
                        <h5 class="fw-bold mb-3">Integration</h5>
                        <div class="info-row">
                            <span class="info-label">El-selskab</span>
                            <span class="info-value" id="utilityCompanyName">-</span>
                        </div>
                        <div class="info-row">
                            <span class="info-label">Kontakt</span>
                            <span class="info-value text-muted small" id="utilityCompanyContact">-</span>
                        </div>
                        <div class="row">
                            <div class="col-md-6">
                                <div class="info-row">
                                    <span class="info-label">vTiger ID</span>
                                    <span class="info-value" id="vtigerId">-</span>
                                </div>
                                <div class="info-row">
                                    <span class="info-label">vTiger Sidst Synkroniseret</span>
                                    <span class="info-value" id="vtigerSyncAt">-</span>
                                </div>
                            </div>
                            <div class="col-md-6">
                                <div class="info-row">
                                    <span class="info-label">e-conomic Sidst Synkroniseret</span>
                                    <span class="info-value" id="economicSyncAt">-</span>
                                </div>
                                <div class="info-row">
                                    <span class="info-label">Oprettet</span>
                                    <span class="info-value" id="createdAt">-</span>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>

                <div class="col-12">
                    <div class="info-card">
                        <div class="d-flex justify-content-between align-items-center mb-3">
                            <h5 class="fw-bold mb-0">Tags</h5>
                            <button class="btn btn-sm btn-outline-primary" onclick="openCustomerTagModal()">
                                <i class="bi bi-tag me-1"></i>Tilføj tag
                            </button>
                        </div>
                        <div id="customerTagsContainer" class="d-flex flex-wrap gap-2"></div>
                        <div id="customerTagsEmpty" class="text-muted small">Ingen tags tilføjet endnu.</div>
                    </div>
                </div>

                <div class="col-12">
                    <div class="info-card">
                        <div class="d-flex justify-content-between align-items-center mb-3">
                            <h5 class="fw-bold mb-0">Leverandørrelationer</h5>
                            <span class="badge bg-primary" id="customerVendorsCount">0</span>
                        </div>
                        <div class="row g-2 mb-3">
                            <div class="col-md-8">
                                <input
                                    type="text"
                                    class="form-control"
                                    id="customerVendorSearch"
                                    placeholder="Søg leverandør (navn, CVR, domæne)"
                                    oninput="searchVendorsForCustomer(this.value)"
                                >
                            </div>
                            <div class="col-md-4 text-md-end">
                                <small class="text-muted">Knyt kunde til leverandør</small>
                            </div>
                        </div>
                        <div id="customerVendorSearchResults" class="list-group mb-3" style="display:none;"></div>
                        <div id="customerVendorLinksContainer" class="list-group mb-2"></div>
                        <div id="customerVendorLinksEmpty" class="text-muted small">Ingen linked leverandører endnu.</div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Contacts Tab -->
        <div class="tab-pane fade" id="contacts">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <div>
                    <h5 class="fw-bold mb-0">Kontaktpersoner</h5>
                    <small class="text-muted">Direkte kontaktoplysninger for denne kunde</small>
                </div>
                <button class="btn btn-primary btn-sm" onclick="showAddContactModal()">
                    <i class="bi bi-plus-lg me-2"></i>Tilføj Kontakt
                </button>
            </div>
            <div class="contacts-toolbar">
                <div class="input-group contacts-search">
                    <span class="input-group-text"><i class="bi bi-search"></i></span>
                    <input type="search" class="form-control" id="contactsSearchInput" placeholder="Søg i navn, titel, email eller nummer">
                </div>
                <div class="d-flex align-items-center gap-2 flex-wrap">
                    <button type="button" class="btn btn-sm btn-outline-secondary" id="contactsOnlyCallableToggle">Kun med nummer</button>
                    <button type="button" class="btn btn-sm btn-outline-secondary" id="contactsClearFilters">Nulstil</button>
                    <span class="badge text-bg-light border" id="contactsResultCount">0</span>
                </div>
            </div>
            <div class="contacts-panel">
                <div class="table-responsive" id="contactsContainer">
                    <table class="table table-hover align-middle contacts-table">
                        <thead>
                            <tr>
                                <th>Navn</th>
                                <th>Titel</th>
                                <th>Email</th>
                                <th>Telefon</th>
                                <th>Mobil</th>
                                <th>Primær</th>
                            </tr>
                        </thead>
                        <tbody>
                            <tr>
                                <td colspan="6" class="text-center py-4">
                                    <div class="spinner-border text-primary"></div>
                                </td>
                            </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>

        <!-- Cases Tab -->
        <div class="tab-pane fade" id="cases">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <div>
                    <h5 class="fw-bold mb-0">Kundens sager</h5>
                    <small class="text-muted">Alle sager knyttet til denne kunde</small>
                </div>
                <div class="d-flex gap-2">
                    <a class="btn btn-sm btn-primary" href="/sag/new?customer_id={{ customer_id }}">
                        <i class="bi bi-plus-lg me-2"></i>Opret sag
                    </a>
                    <a class="btn btn-sm btn-outline-secondary" href="/sag?customer_id={{ customer_id }}">
                        <i class="bi bi-box-arrow-up-right me-2"></i>Åbn i sagsmodul
                    </a>
                </div>
            </div>
            <div class="table-responsive" id="customerCasesContainer">
                <table class="table table-hover align-middle mb-0">
                    <thead class="table-light">
                        <tr>
                            <th>SagsID</th>
                            <th>Titel</th>
                            <th>Status</th>
                            <th>Prioritet</th>
                            <th>Oprettet</th>
                            <th class="text-end">Handling</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td colspan="6" class="text-center py-4">
                                <div class="spinner-border text-primary"></div>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
            <div id="customerCasesEmpty" class="text-center py-5 text-muted d-none">
                Ingen sager fundet for denne kunde
            </div>
        </div>

        <!-- Kontakt Tab -->
        <div class="tab-pane fade" id="kontakt">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <h5 class="fw-bold mb-0">Kontakt historik</h5>
                <div class="btn-group btn-group-sm" role="group" aria-label="Kontakt filter">
                    <button type="button" class="btn btn-outline-secondary active" id="customerKontaktFilterAll" onclick="setCustomerKontaktFilter('all')">Alle</button>
                    <button type="button" class="btn btn-outline-secondary" id="customerKontaktFilterSms" onclick="setCustomerKontaktFilter('sms')">SMS</button>
                    <button type="button" class="btn btn-outline-secondary" id="customerKontaktFilterCall" onclick="setCustomerKontaktFilter('call')">Opkald</button>
                </div>
            </div>
            <div id="customerKontaktContainer">
                <div class="text-center py-5">
                    <div class="spinner-border text-primary"></div>
                </div>
            </div>
        </div>

        <!-- Invoices Tab -->
        <div class="tab-pane fade" id="invoices">
            <h5 class="fw-bold mb-4">Fakturaer</h5>
            <div class="text-muted text-center py-5">
                Fakturamodul kommer snart...
            </div>
        </div>

        <!-- Subscriptions Tab -->
        <div class="tab-pane fade" id="subscriptions">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <h5 class="fw-bold mb-0">Abonnnents tjek</h5>
                <div class="btn-group">
                    <button class="btn btn-success btn-sm" onclick="showCreateSubscriptionModal()">
                        <i class="bi bi-plus-circle me-2"></i>Opret Abonnement
                    </button>
                    <button class="btn btn-primary btn-sm" onclick="loadSubscriptions()">
                        <i class="bi bi-arrow-repeat me-2"></i>Opdater fra vTiger
                    </button>
                </div>
            </div>

            <!-- Internal Comment Box -->
            <div class="card mb-4" style="border-left: 4px solid var(--accent);">
                <div class="card-body">
                    <h6 class="fw-bold mb-3">
                        <i class="bi bi-shield-lock me-2"></i>Intern Kommentar
                        <small class="text-muted fw-normal">(kun synlig for medarbejdere)</small>
                    </h6>
                    <div id="internalCommentDisplay" class="mb-3" style="display: none;">
                        <div class="alert alert-light mb-2">
                            <div style="white-space: pre-wrap;" id="commentText"></div>
                        </div>
                        <div class="d-flex justify-content-between align-items-center">
                            <small class="text-muted" id="commentMeta"></small>
                            <button type="button" class="btn btn-sm btn-outline-primary" onclick="editInternalComment()" title="Rediger kommentar">
                                <i class="bi bi-pencil me-1"></i>Rediger
                            </button>
                        </div>
                    </div>
                    <div id="internalCommentEdit">
                        <textarea class="form-control mb-2" id="internalCommentInput" rows="3" 
                                  placeholder="Skriv intern note om kundens abonnementer..."></textarea>
                        <div class="d-flex justify-content-end gap-2">
                            <button class="btn btn-sm btn-primary" onclick="saveInternalComment()">
                                <i class="bi bi-save me-1"></i>Gem Kommentar
                            </button>
                        </div>
                    </div>
                </div>
            </div>
            
            <div id="subscriptionsContainer">
                <div class="text-center py-5">
                    <div class="spinner-border text-primary"></div>
                    <p class="text-muted mt-3">Henter data fra vTiger...</p>
                </div>
            </div>
        </div>

        <!-- Pipeline Tab -->
        <div class="tab-pane fade" id="pipeline">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <div>
                    <h5 class="fw-bold mb-0">Kunde pipeline</h5>
                    <small class="text-muted">Muligheder knyttet til kunden</small>
                </div>
                <button class="btn btn-primary btn-sm" onclick="openCustomerOpportunityModal()">
                    <i class="bi bi-plus-lg me-2"></i>Opret mulighed
                </button>
            </div>
            <div class="card">
                <div class="table-responsive">
                    <table class="table table-hover align-middle mb-0">
                        <thead class="table-light">
                            <tr>
                                <th>Titel</th>
                                <th>Beløb</th>
                                <th>Stage</th>
                                <th>Sandsynlighed</th>
                                <th class="text-end">Handling</th>
                            </tr>
                        </thead>
                        <tbody id="customerOpportunitiesTable">
                            <tr>
                                <td colspan="5" class="text-center py-4">
                                    <div class="spinner-border text-primary"></div>
                                </td>
                            </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>

        <!-- Billing Matrix Tab -->
        <div class="tab-pane fade" id="billing-matrix">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <h5 class="fw-bold mb-0">
                    <i class="bi bi-table me-2"></i>Abonnements-matrix
                    <small class="text-muted fw-normal">(fra e-conomic)</small>
                </h5>
                <button class="btn btn-sm btn-outline-primary" onclick="loadBillingMatrix()" title="Hent fakturaer fra e-conomic">
                    <i class="bi bi-arrow-repeat me-1"></i>Opdater
                </button>
            </div>
            
            <!-- Search field -->
            <div class="mb-3" id="matrixSearchContainer" style="display: none;">
                <div class="input-group">
                    <span class="input-group-text">
                        <i class="bi bi-search"></i>
                    </span>
                    <input type="text" class="form-control" id="matrixSearchInput" placeholder="Søg efter produkt..." onkeyup="filterMatrixProducts()">
                    <button class="btn btn-outline-secondary" type="button" onclick="clearMatrixSearch()">
                        <i class="bi bi-x"></i>
                    </button>
                </div>
            </div>
            
            <div id="billingMatrixContainer" style="display: none;">
                <div class="table-responsive">
                    <table class="table table-sm table-hover mb-0" id="billingMatrixTable">
                        <thead class="table-light">
                            <tr id="matrixHeaderRow">
                                <th style="min-width: 200px;">Vare</th>
                                <!-- Months will be added dynamically -->
                            </tr>
                        </thead>
                        <tbody id="matrixBodyRows">
                            <!-- Rows will be added dynamically -->
                        </tbody>
                    </table>
                </div>
            </div>
            <div id="billingMatrixLoading" class="text-center py-5">
                <div class="spinner-border spinner-border-sm text-primary"></div>
                <p class="text-muted mt-2">Henter fakturamatrix fra e-conomic...</p>
            </div>
            <div id="billingMatrixEmpty" style="display: none;" class="text-center py-5">
                <p class="text-muted">Ingen fakturaer fundet for denne kunde</p>
            </div>
        </div>

        <!-- ACMP Tab -->
        <div class="tab-pane fade" id="acmp">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <h5 class="fw-bold mb-0">
                    <i class="bi bi-cloud me-2"></i>ACMP Detaljer
                    <small class="text-muted fw-normal">(ALSO Cloud Marketplace)</small>
                </h5>
                <button class="btn btn-sm btn-outline-primary" onclick="loadAcmpOverview()" title="Opdater ACMP-data">
                    <i class="bi bi-arrow-repeat me-1"></i>Opdater
                </button>
            </div>

            <div id="acmpLoading" class="text-center py-5">
                <div class="spinner-border spinner-border-sm text-primary"></div>
                <p class="text-muted mt-2">Henter ACMP-data...</p>
            </div>

            <div id="acmpEmpty" class="text-center py-5" style="display:none;">
                <p class="text-muted mb-0">Ingen ACMP-data for denne kunde endnu</p>
            </div>

            <div id="acmpContainer" style="display:none;">
                <div class="row g-3 mb-3">
                    <div class="col-lg-3 col-md-6">
                        <div class="acmp-stat-card">
                            <div class="acmp-stat-label">Månedens omsætning</div>
                            <div class="acmp-stat-value" id="acmpRevenueMonth">0 kr.</div>
                        </div>
                    </div>
                    <div class="col-lg-3 col-md-6">
                        <div class="acmp-stat-card">
                            <div class="acmp-stat-label">Månedens dækningsbidrag</div>
                            <div class="acmp-stat-value" id="acmpMarginMonth">0 kr.</div>
                        </div>
                    </div>
                    <div class="col-lg-3 col-md-6">
                        <div class="acmp-stat-card">
                            <div class="acmp-stat-label">Produkter</div>
                            <div class="acmp-stat-value" id="acmpDistinctProducts">0</div>
                        </div>
                    </div>
                    <div class="col-lg-3 col-md-6">
                        <div class="acmp-stat-card">
                            <div class="acmp-stat-label">Ventende godkendelser</div>
                            <div class="acmp-stat-value" id="acmpPendingApprovals">0</div>
                        </div>
                    </div>
                </div>

                <div class="row g-3 mb-3">
                    <div class="col-lg-6">
                        <div class="info-card">
                            <h6 class="fw-bold mb-3">Statusfordeling</h6>
                            <div id="acmpStatusBreakdown" class="d-flex flex-wrap gap-2"></div>
                        </div>
                    </div>
                    <div class="col-lg-6">
                        <div class="info-card">
                            <h6 class="fw-bold mb-3">Månedlig udvikling (seneste 6 mdr)</h6>
                            <div class="table-responsive">
                                <table class="table table-sm mb-0">
                                    <thead>
                                        <tr>
                                            <th>Måned</th>
                                            <th class="text-end">Oms.</th>
                                            <th class="text-end">DB</th>
                                        </tr>
                                    </thead>
                                    <tbody id="acmpMonthlyRows"></tbody>
                                </table>
                            </div>
                        </div>
                    </div>
                </div>

                <div class="info-card">
                    <div class="d-flex justify-content-between align-items-center mb-3">
                        <h6 class="fw-bold mb-0">Produkter</h6>
                        <small class="text-muted">Top 200 pr. omsætning</small>
                    </div>
                    <div class="table-responsive">
                        <table class="table table-sm table-hover mb-0">
                            <thead class="table-light">
                                <tr>
                                    <th>Produkt</th>
                                    <th>Materiale</th>
                                    <th>Vendor</th>
                                    <th class="text-end">Nu</th>
                                    <th class="text-end">Sidste md.</th>
                                    <th class="text-end">Ændring</th>
                                    <th class="text-end">Antal</th>
                                    <th class="text-end">Omsætning</th>
                                    <th class="text-end">DB</th>
                                </tr>
                            </thead>
                            <tbody id="acmpProductsRows"></tbody>
                        </table>
                    </div>
                </div>

                <div class="row g-3 mt-1">
                    <div class="col-lg-6">
                        <div class="info-card h-100">
                            <div class="d-flex justify-content-between align-items-center mb-3">
                                <h6 class="fw-bold mb-0">Ændringer siden sidste måned</h6>
                                <small class="text-muted">Pr. produkt</small>
                            </div>
                            <div class="table-responsive">
                                <table class="table table-sm table-hover mb-0">
                                    <thead class="table-light">
                                        <tr>
                                            <th>Produkt</th>
                                            <th class="text-end">Sidste md.</th>
                                            <th class="text-end">Nu</th>
                                            <th class="text-end">Delta</th>
                                        </tr>
                                    </thead>
                                    <tbody id="acmpChangesRows"></tbody>
                                </table>
                            </div>
                        </div>
                    </div>
                    <div class="col-lg-6">
                        <div class="info-card h-100">
                            <div class="d-flex justify-content-between align-items-center mb-3">
                                <h6 class="fw-bold mb-0">Seneste ACMP-linjer</h6>
                                <small class="text-muted">Seneste 50 linjer</small>
                            </div>
                            <div class="table-responsive">
                                <table class="table table-sm table-hover mb-0">
                                    <thead class="table-light">
                                        <tr>
                                            <th>Dato</th>
                                            <th>Produkt</th>
                                            <th class="text-end">Antal</th>
                                            <th class="text-end">Oms.</th>
                                            <th>Status</th>
                                        </tr>
                                    </thead>
                                    <tbody id="acmpRecentRows"></tbody>
                                </table>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Locations Tab -->
        <div class="tab-pane fade" id="locations">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <div>
                    <h5 class="fw-bold mb-0">Lokationer</h5>
                    <small class="text-muted">Lokationer knyttet til kunden</small>
                </div>
                <div class="d-flex gap-2">
                    <a href="/app/locations/wizard" class="btn btn-sm btn-primary">
                        <i class="bi bi-plus-lg me-2"></i>Opret lokation
                    </a>
                    <a href="/app/locations" class="btn btn-sm btn-outline-secondary">
                        <i class="bi bi-list-ul me-2"></i>Se alle
                    </a>
                </div>
            </div>
            <div id="customerLocationsList" class="list-group mb-3"></div>
            <div id="customerLocationsEmpty" class="text-center py-5 text-muted">
                Ingen lokationer fundet for denne kunde
            </div>
        </div>

        <div class="tab-pane fade" id="internet-connections">
            <div class="internet-shell">
                <div class="d-flex flex-column flex-lg-row justify-content-between align-items-lg-center gap-3 mb-4">
                    <div>
                        <h5 class="fw-bold mb-1">
                            <i class="bi bi-hdd-network me-2"></i>Internetforbindelser
                        </h5>
                        <div class="text-muted">Fiber, WAN, kredsløb, IP-ranges og økonomi samlet på kunden.</div>
                    </div>
                    <div class="d-flex gap-2 flex-wrap">
                        <a class="btn btn-sm btn-outline-secondary" href="/economy/internet-connections">
                            <i class="bi bi-box-arrow-up-right me-1"></i>Åbn modul
                        </a>
                        <button class="btn btn-sm btn-primary" type="button" onclick="toggleCustomerInternetCreate()">
                            <i class="bi bi-plus-lg me-1"></i>Ny forbindelse
                        </button>
                    </div>
                </div>

                <div class="row g-3 mb-4">
                    <div class="col-6 col-xl-3">
                        <div class="internet-stat-card">
                            <div class="internet-stat-label">Forbindelser</div>
                            <div class="internet-stat-value" id="customerInternetCount">0</div>
                        </div>
                    </div>
                    <div class="col-6 col-xl-3">
                        <div class="internet-stat-card">
                            <div class="internet-stat-label">Månedlig kost</div>
                            <div class="internet-stat-value" id="customerInternetCost">0 kr.</div>
                        </div>
                    </div>
                    <div class="col-6 col-xl-3">
                        <div class="internet-stat-card">
                            <div class="internet-stat-label">Månedligt salg</div>
                            <div class="internet-stat-value" id="customerInternetSales">0 kr.</div>
                        </div>
                    </div>
                    <div class="col-6 col-xl-3">
                        <div class="internet-stat-card">
                            <div class="internet-stat-label">Aktive IP'er</div>
                            <div class="internet-stat-value" id="customerInternetIps">0</div>
                        </div>
                    </div>
                </div>

                <div class="internet-create-panel mb-4 d-none" id="customerInternetCreatePanel">
                    <div class="d-flex justify-content-between align-items-center mb-3">
                        <div>
                            <div class="fw-semibold">Opret forbindelse på kunden</div>
                            <div class="small text-muted">Knytter automatisk forbindelsen til denne kunde.</div>
                        </div>
                        <button class="btn btn-sm btn-outline-secondary" type="button" onclick="toggleCustomerInternetCreate(false)">Luk</button>
                    </div>
                    <div class="row g-2">
                        <div class="col-md-4">
                            <input type="text" class="form-control" id="customerInternetName" placeholder="Navn på forbindelse">
                        </div>
                        <div class="col-md-3">
                            <input type="text" class="form-control" id="customerInternetProvider" placeholder="Leverandør">
                        </div>
                        <div class="col-md-2">
                            <input type="text" class="form-control" id="customerInternetCircuit" placeholder="Kredsløb">
                        </div>
                        <div class="col-md-3">
                            <input type="text" class="form-control" id="customerInternetTechnology" placeholder="Teknologi">
                        </div>
                        <div class="col-md-4">
                            <input type="text" class="form-control" id="customerInternetAddress" placeholder="Installationsadresse">
                        </div>
                        <div class="col-md-2">
                            <input type="number" class="form-control" id="customerInternetDownload" placeholder="Download">
                        </div>
                        <div class="col-md-2">
                            <input type="number" class="form-control" id="customerInternetUpload" placeholder="Upload">
                        </div>
                        <div class="col-md-2">
                            <input type="number" class="form-control" id="customerInternetCostInput" placeholder="Kost">
                        </div>
                        <div class="col-md-2">
                            <input type="number" class="form-control" id="customerInternetSalesInput" placeholder="Salg">
                        </div>
                        <div class="col-md-12">
                            <textarea class="form-control" id="customerInternetNotes" rows="2" placeholder="Noter, SLA, overvågning, aftaler..."></textarea>
                        </div>
                    </div>
                    <div class="mt-3 d-flex gap-2">
                        <button class="btn btn-primary" type="button" onclick="createCustomerInternetConnection()">Gem forbindelse</button>
                        <div class="small text-muted align-self-center" id="customerInternetCreateFeedback"></div>
                    </div>
                </div>

                <div id="customerInternetLoading" class="text-center py-5">
                    <div class="spinner-border spinner-border-sm text-primary"></div>
                    <div class="text-muted mt-2">Henter internetforbindelser...</div>
                </div>

                <div id="customerInternetEmpty" class="text-center py-5 d-none">
                    <div class="fw-semibold mb-1">Ingen internetforbindelser på kunden endnu</div>
                    <div class="text-muted">Opret den første forbindelse direkte her eller i internetmodulet.</div>
                </div>

                <div id="customerInternetList" class="d-none"></div>
            </div>
        </div>

        <!-- Hardware Tab -->
        <div class="tab-pane fade" id="hardware">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <div>
                    <h5 class="fw-bold mb-0">Hardware</h5>
                    <small class="text-muted">Hardware knyttet til kunden</small>
                </div>
                <div class="d-flex align-items-center gap-2">
                    <a class="btn btn-sm btn-primary" href="/hardware/new">
                        <i class="bi bi-plus-lg me-2"></i>Tilføj hardware
                    </a>
                    <label for="hardwareGroupBy" class="form-label mb-0 small text-muted">Gruppér efter</label>
                    <select class="form-select form-select-sm" id="hardwareGroupBy" style="min-width: 180px;">
                        <option value="location">Lokation</option>
                        <option value="type">Type</option>
                        <option value="model">Model/Version</option>
                        <option value="vendor">Leverandør</option>
                    </select>
                </div>
            </div>
            <div class="table-responsive" id="customerHardwareContainer">
                <table class="table table-hover align-middle mb-0">
                    <thead class="table-light">
                        <tr>
                            <th>Hardware</th>
                            <th>Type</th>
                            <th>Serienr.</th>
                            <th>Lokation</th>
                            <th>Status</th>
                            <th class="text-end">Handling</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td colspan="6" class="text-center py-4">
                                <div class="spinner-border text-primary"></div>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
            <div id="customerHardwareEmpty" class="text-center py-5 text-muted d-none">
                Ingen hardware fundet for denne kunde
            </div>
        </div>

        <!-- Links Tab -->
        <div class="tab-pane fade" id="links">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <div>
                    <h5 class="fw-bold mb-0">Links / Endpoints</h5>
                    <small class="text-muted">Driftslinks knyttet til denne kunde</small>
                </div>
                <a class="btn btn-sm btn-outline-primary" href="/links?customer_id={{ customer_id }}">
                    <i class="bi bi-box-arrow-up-right me-2"></i>Åbn fuld visning
                </a>
            </div>
            <div class="table-responsive" id="customerLinksContainer">
                <table class="table table-hover align-middle mb-0">
                    <thead class="table-light">
                        <tr>
                            <th>Navn</th>
                            <th>Type</th>
                            <th>Mål</th>
                            <th>Miljø</th>
                            <th class="text-end">Handling</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td colspan="5" class="text-center py-4">
                                <div class="spinner-border text-primary"></div>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
            <div id="customerLinksEmpty" class="text-center py-5 text-muted d-none">
                Ingen links fundet for denne kunde
            </div>
        </div>

        <!-- Nextcloud Tab -->
        <div class="tab-pane fade d-none" id="nextcloud">
            {% include "modules/nextcloud/templates/tab.html" %}
        </div>

        <!-- Remote Sessions Tab -->
        <div class="tab-pane fade" id="remote-sessions">
            <div class="d-flex flex-wrap justify-content-between align-items-center gap-3 mb-4">
                <h5 class="fw-bold mb-0">Remote Sessions</h5>
                <div class="d-flex flex-wrap gap-2">
                    <input type="text" class="form-control form-control-sm" id="customerSessionDescription" placeholder="Beskrivelse (valgfri)" style="min-width: 240px;">
                    <button class="btn btn-primary btn-sm" onclick="startCustomerSession()">
                        <i class="bi bi-play-circle me-2"></i>Start Session
                    </button>
                    <button class="btn btn-outline-secondary btn-sm" onclick="loadCustomerSessions()">
                        <i class="bi bi-arrow-repeat me-2"></i>Opdater
                    </button>
                </div>
            </div>
            <div id="customerSessionAlert" class="alert alert-info d-none"></div>
            <div class="row g-3" id="customerSessionsContainer">
                <div class="col-12 text-center py-5">
                    <div class="spinner-border text-primary"></div>
                </div>
            </div>
        </div>

        <!-- Activity Tab -->
        <div class="tab-pane fade" id="activity">
            <h5 class="fw-bold mb-4">Aktivitet</h5>
            <div id="activityContainer">
                <div class="text-center py-5">
                    <div class="spinner-border text-primary"></div>
                </div>
            </div>
        </div>

        <!-- Conversations Tab -->
        <div class="tab-pane fade" id="conversations">
             <div class="d-flex justify-content-between align-items-center mb-4">
                <h5 class="fw-bold mb-0">Samtaler</h5>
                <!-- 
                <button class="btn btn-primary btn-sm" onclick="showUploadConversationModal()">
                    <i class="bi bi-upload me-2"></i>Upload Samtale
                </button> 
                -->
            </div>
            
            <div class="input-group mb-4">
                <span class="input-group-text"><i class="bi bi-search"></i></span>
                <input type="text" class="form-control" id="conversationSearch" placeholder="Søg i transskriberinger..." onkeyup="filterConversations()">
            </div>

            <div id="conversationsContainer">
                <!-- Loaded via JS -->
                 <div class="text-center py-5">
                    <span class="text-muted">Henter samtaler...</span>
                </div>
            </div>
        </div>

        <!-- Drift Tab -->
        <div class="tab-pane fade" id="drift">
            <div class="d-flex justify-content-between align-items-center mb-4">
                <h5 class="fw-bold mb-0">Drift historik</h5>
                <button class="btn btn-sm btn-outline-primary" onclick="loadCustomerDrift()">
                    <i class="bi bi-arrow-repeat me-1"></i>Opdater
                </button>
            </div>

            <div class="row g-3 mb-4">
                <div class="col-6 col-lg-3">
                    <div class="card border-0 shadow-sm h-100"><div class="card-body"><div class="small text-muted">Aktive</div><div class="fs-4 fw-bold" id="customerDriftActive">0</div></div></div>
                </div>
                <div class="col-6 col-lg-3">
                    <div class="card border-0 shadow-sm h-100"><div class="card-body"><div class="small text-muted">Kritiske</div><div class="fs-4 fw-bold text-danger" id="customerDriftCritical">0</div></div></div>
                </div>
                <div class="col-6 col-lg-3">
                    <div class="card border-0 shadow-sm h-100"><div class="card-body"><div class="small text-muted">Godkendte</div><div class="fs-4 fw-bold text-warning" id="customerDriftAcknowledged">0</div></div></div>
                </div>
                <div class="col-6 col-lg-3">
                    <div class="card border-0 shadow-sm h-100"><div class="card-body"><div class="small text-muted">Løste</div><div class="fs-4 fw-bold text-success" id="customerDriftResolved">0</div></div></div>
                </div>
            </div>

            <div class="table-responsive">
                <table class="table table-hover align-middle">
                    <thead>
                        <tr>
                            <th>Status</th>
                            <th>Severity</th>
                            <th>Enhed</th>
                            <th>Besked</th>
                            <th>Start</th>
                            <th>Kilde</th>
                        </tr>
                    </thead>
                    <tbody id="customerDriftEventsBody">
                        <tr><td colspan="6" class="text-muted">Åbn fanen for at hente drift-data...</td></tr>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
        </div>
    </div>
    
    <!-- Edit Customer Modal -->
    <div class="modal fade" id="editCustomerModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title">
                        <i class="bi bi-pencil-square me-2"></i>Rediger Kunde
                    </h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <form id="editCustomerForm">
                        <div class="row g-3">
                            <!-- Basic Info -->
                            <div class="col-12">
                                <h6 class="text-muted text-uppercase small fw-bold mb-3">
                                    <i class="bi bi-building me-2"></i>Grundlæggende Oplysninger
                                </h6>
                            </div>
                            
                            <div class="col-md-6">
                                <label for="editName" class="form-label">Virksomhedsnavn *</label>
                                <input type="text" class="form-control" id="editName" required>
                            </div>
                            
                            <div class="col-md-6">
                                <label for="editCvrNumber" class="form-label">CVR-nummer</label>
                                <input type="text" class="form-control" id="editCvrNumber" maxlength="20">
                            </div>
                            
                            <div class="col-md-6">
                                <label for="editEmail" class="form-label">Email</label>
                                <input type="email" class="form-control" id="editEmail">
                            </div>
                            
                            <div class="col-md-6">
                                <label for="editInvoiceEmail" class="form-label">Faktura Email</label>
                                <input type="email" class="form-control" id="editInvoiceEmail">
                            </div>
                            
                            <div class="col-md-6">
                                <label for="editPhone" class="form-label">Telefon</label>
                                <input type="tel" class="form-control" id="editPhone">
                            </div>
                            
                            <div class="col-md-6">
                                <label for="editMobilePhone" class="form-label">Mobil</label>
                                <input type="tel" class="form-control" id="editMobilePhone">
                            </div>
                            
                            <div class="col-md-6">
                                <label for="editWebsite" class="form-label">Hjemmeside</label>
                                <input type="url" class="form-control" id="editWebsite" placeholder="https://">
                            </div>

                            <div class="col-md-6">
                                <label for="editWikiSlug" class="form-label">Wiki slug</label>
                                <input type="text" class="form-control" id="editWikiSlug" placeholder="norva24">
                                <div class="form-text">Bygger https://wiki.bmcnetworks.dk/en/Kunder/{slug}</div>
                            </div>
                            
                            <div class="col-md-6">
                                <label for="editCountry" class="form-label">Land</label>
                                <select class="form-select" id="editCountry">
                                    <option value="DK">Danmark</option>
                                    <option value="NO">Norge</option>
                                    <option value="SE">Sverige</option>
                                    <option value="DE">Tyskland</option>
                                    <option value="GB">Storbritannien</option>
                                </select>
                            </div>
                            
                            <!-- Address -->
                            <div class="col-12 mt-4">
                                <h6 class="text-muted text-uppercase small fw-bold mb-3">
                                    <i class="bi bi-geo-alt me-2"></i>Adresse
                                </h6>
                            </div>
                            
                            <div class="col-12">
                                <label for="editAddress" class="form-label">Adresse</label>
                                <input type="text" class="form-control" id="editAddress">
                            </div>
                            
                            <div class="col-md-4">
                                <label for="editPostalCode" class="form-label">Postnummer</label>
                                <input type="text" class="form-control" id="editPostalCode" maxlength="10">
                            </div>
                            
                            <div class="col-md-8">
                                <label for="editCity" class="form-label">By</label>
                                <input type="text" class="form-control" id="editCity">
                            </div>

                            <!-- Economic defaults -->
                            <div class="col-12 mt-4">
                                <h6 class="text-muted text-uppercase small fw-bold mb-3">
                                    <i class="bi bi-currency-exchange me-2"></i>Økonomiske standarder
                                </h6>
                            </div>

                            <div class="col-md-6">
                                <label for="editStandardMarginPercent" class="form-label">Standard avance (%)</label>
                                <input type="number" class="form-control" id="editStandardMarginPercent" min="0" max="1000" step="0.01">
                            </div>

                            <div class="col-md-6">
                                <label for="editStandardHourlyRate" class="form-label">Standard timepris (DKK)</label>
                                <input type="number" class="form-control" id="editStandardHourlyRate" min="0" step="0.01">
                            </div>

                            <div class="col-md-6">
                                <label for="editSpecialFreightPrice" class="form-label">Særlig fragtpris (DKK)</label>
                                <input type="number" class="form-control" id="editSpecialFreightPrice" min="0" step="0.01">
                            </div>

                            <div class="col-md-6">
                                <label for="editInvoiceFeeAmount" class="form-label">Faktureringsgebyr (DKK)</label>
                                <input type="number" class="form-control" id="editInvoiceFeeAmount" min="0" step="0.01">
                                <div class="form-text">Sæt 0 for at slå gebyr fra på ordren.</div>
                            </div>

                            <div class="col-md-6 d-flex align-items-end">
                                <div class="form-check form-switch mb-2">
                                    <input class="form-check-input" type="checkbox" id="editSupplierServiceEnrolled">
                                    <label class="form-check-label" for="editSupplierServiceEnrolled">
                                        Tilmeldt leverandørservice
                                    </label>
                                </div>
                            </div>
                            
                            <!-- Status -->
                            <div class="col-12 mt-4">
                                <div class="form-check form-switch">
                                    <input class="form-check-input" type="checkbox" id="editIsActive" checked>
                                    <label class="form-check-label" for="editIsActive">
                                        <strong>Aktiv kunde</strong>
                                        <div class="small text-muted">Deaktiver for at skjule kunden fra lister</div>
                                    </label>
                                </div>
                            </div>
                        </div>
                    </form>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">
                        <i class="bi bi-x-lg me-2"></i>Annuller
                    </button>
                    <button type="button" class="btn btn-primary" onclick="saveCustomerEdit()">
                        <i class="bi bi-check-lg me-2"></i>Gem Ændringer
                    </button>
                </div>
            </div>
        </div>
    </div>

    <!-- Customer Tag Modal -->
    <div class="modal fade" id="customerTagModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title"><i class="bi bi-tag me-2"></i>Tilføj tag</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label">Vælg tag</label>
                        <select class="form-select" id="customerTagSelect"></select>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Annuller</button>
                    <button type="button" class="btn btn-primary" onclick="addCustomerTag()">Tilføj</button>
                </div>
            </div>
        </div>
    </div>

    <!-- Nextcloud Create User Modal -->
    <div class="modal fade" id="nextcloudCreateUserModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header bg-primary text-white">
                    <h5 class="modal-title"><i class="bi bi-person-plus me-2"></i>Opret Nextcloud bruger</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label">Søg eksisterende bruger</label>
                        <input type="text" class="form-control" id="ncCreateSearch" placeholder="Skriv for at søge">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Vælg bruger (til grupper)</label>
                        <select class="form-select" id="ncCreateUserSelect"></select>
                        <div class="form-text">Vælg en eksisterende bruger for at kopiere grupper.</div>
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Brugernavn *</label>
                        <input type="text" class="form-control" id="ncCreateUid" placeholder="f.eks. fornavn.efternavn" required>
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Navn (display)</label>
                        <input type="text" class="form-control" id="ncCreateDisplayName" placeholder="Visningsnavn">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Email</label>
                        <input type="email" class="form-control" id="ncCreateEmail" placeholder="mail@firma.dk">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Grupper</label>
                        <select class="form-select" id="ncCreateGroups" multiple size="6"></select>
                        <div class="form-text">Hold Cmd/Ctrl nede for at vælge flere.</div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Annuller</button>
                    <button type="button" class="btn btn-primary" onclick="createNextcloudUser()">Opret bruger</button>
                </div>
            </div>
        </div>
    </div>

    <!-- Nextcloud Reset Password Modal -->
    <div class="modal fade" id="nextcloudResetPasswordModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header bg-secondary text-white">
                    <h5 class="modal-title"><i class="bi bi-key me-2"></i>Reset Nextcloud password</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label">Søg bruger</label>
                        <input type="text" class="form-control" id="ncResetSearch" placeholder="Skriv for at søge">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Vælg bruger</label>
                        <select class="form-select" id="ncResetUserSelect"></select>
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Brugernavn *</label>
                        <input type="text" class="form-control" id="ncResetUid" placeholder="f.eks. fornavn.efternavn" required readonly>
                    </div>
                    <div class="form-check">
                        <input class="form-check-input" type="checkbox" id="ncResetSendEmail" checked>
                        <label class="form-check-label" for="ncResetSendEmail">Send email med nyt password</label>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Annuller</button>
                    <button type="button" class="btn btn-outline-secondary" onclick="resetNextcloudPassword()">Reset</button>
                </div>
            </div>
        </div>
    </div>

    <!-- Nextcloud Disable User Modal -->
    <div class="modal fade" id="nextcloudDisableUserModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header bg-danger text-white">
                    <h5 class="modal-title"><i class="bi bi-person-x me-2"></i>Luk Nextcloud bruger</h5>
                    <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label">Søg bruger</label>
                        <input type="text" class="form-control" id="ncDisableSearch" placeholder="Skriv for at søge">
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Vælg bruger</label>
                        <select class="form-select" id="ncDisableUserSelect"></select>
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Brugernavn *</label>
                        <input type="text" class="form-control" id="ncDisableUid" placeholder="f.eks. fornavn.efternavn" required readonly>
                    </div>
                    <div class="alert alert-warning mb-0">
                        <i class="bi bi-exclamation-triangle me-2"></i>
                        Brugeren bliver deaktiveret i Nextcloud.
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Annuller</button>
                    <button type="button" class="btn btn-danger" onclick="disableNextcloudUser()">Luk bruger</button>
                </div>
            </div>
        </div>
    </div>
    
    <!-- Subscription Modal -->
    <div class="modal fade" id="subscriptionModal" tabindex="-1">
        <div class="modal-dialog">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title" id="subscriptionModalLabel">Opret Abonnement</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <form id="subscriptionForm">
                        <input type="hidden" id="subscriptionId">
                        
                        <div class="mb-3">
                            <label for="subjectInput" class="form-label">Emne/Navn *</label>
                            <input type="text" class="form-control" id="subjectInput" required>
                        </div>
                        
                        <div class="row">
                            <div class="col-md-6 mb-3">
                                <label for="startdateInput" class="form-label">Startdato *</label>
                                <input type="date" class="form-control" id="startdateInput" required>
                            </div>
                            <div class="col-md-6 mb-3">
                                <label for="enddateInput" class="form-label">Slutdato</label>
                                <input type="date" class="form-control" id="enddateInput">
                            </div>
                        </div>
                        
                        <div class="mb-3">
                            <label for="frequencyInput" class="form-label">Frekvens *</label>
                            <select class="form-select" id="frequencyInput" required>
                                <option value="Monthly">Månedlig</option>
                                <option value="Quarterly">Kvartalsvis</option>
                                <option value="Half-Yearly">Halvårlig</option>
                                <option value="Yearly">Årlig</option>
                            </select>
                        </div>
                        
                        <div class="mb-3">
                            <label for="statusInput" class="form-label">Status *</label>
                            <select class="form-select" id="statusInput" required>
                                <option value="Active">Aktiv</option>
                                <option value="Stopped">Stoppet</option>
                                <option value="Cancelled">Annulleret</option>
                            </select>
                        </div>
                        
                        <div class="alert alert-info">
                            <i class="bi bi-info-circle me-2"></i>
                            Produkter skal tilføjes i vTiger efter oprettelse
                        </div>
                    </form>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Annuller</button>
                    <button type="button" class="btn btn-primary" onclick="saveSubscription()">Gem</button>
                </div>
            </div>
        </div>
    </div>

    <!-- Customer Opportunity Modal -->
    <div class="modal fade" id="customerOpportunityModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">Opret mulighed</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <form id="customerOpportunityForm">
                        <div class="row g-3">
                            <div class="col-md-6">
                                <label class="form-label">Titel *</label>
                                <input type="text" class="form-control" id="customerOpportunityTitle" required>
                            </div>
                            <div class="col-md-6">
                                <label class="form-label">Stage</label>
                                <select class="form-select" id="customerOpportunityStage"></select>
                            </div>
                            <div class="col-md-6">
                                <label class="form-label">Beløb</label>
                                <input type="number" step="0.01" class="form-control" id="customerOpportunityAmount">
                            </div>
                            <div class="col-md-6">
                                <label class="form-label">Valuta</label>
                                <select class="form-select" id="customerOpportunityCurrency">
                                    <option value="DKK">DKK</option>
                                    <option value="EUR">EUR</option>
                                    <option value="USD">USD</option>
                                </select>
                            </div>
                            <div class="col-md-6">
                                <label class="form-label">Forventet lukning</label>
                                <input type="date" class="form-control" id="customerOpportunityCloseDate">
                            </div>
                            <div class="col-12">
                                <label class="form-label">Beskrivelse</label>
                                <textarea class="form-control" id="customerOpportunityDescription" rows="3"></textarea>
                            </div>
                        </div>
                    </form>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Annuller</button>
                    <button type="button" class="btn btn-primary" onclick="createCustomerOpportunity()">Gem</button>
                </div>
            </div>
        </div>
    </div>

                <!-- Worklog Suggestion Modal -->
                <div class="modal fade" id="customerWorklogSuggestionModal" tabindex="-1">
                    <div class="modal-dialog">
                        <div class="modal-content">
                            <div class="modal-header">
                                <h5 class="modal-title">Forslag til tidsregistrering</h5>
                                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                            </div>
                            <div class="modal-body" id="customerWorklogSuggestionBody"></div>
                            <div class="modal-footer">
                                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Luk</button>
                            </div>
                        </div>
                    </div>
                </div>
{% endblock %}

{% block extra_js %}
<!-- Alert Notes Components -->
<script src="/static/alert_notes/alert_check.js"></script>
{% include "alert_notes/frontend/alert_box.html" %}
{% include "alert_notes/frontend/alert_modal.html" %}
{% include "alert_notes/frontend/alert_form_modal.html" %}

<script>
const customerId = parseInt(window.location.pathname.split('/').pop());
const customerDefaultMarginPercent = Number({{ customer_default_margin_percent | tojson }} || 20);
const customerDefaultInvoiceFee = Number({{ customer_default_invoice_fee | tojson }} || 49);
const customerDefaultHourlyRate = Number({{ customer_default_hourly_rate | tojson }} || 1200);
let customerData = null;
let pipelineStages = [];
let allTagsCache = [];
let customerKontaktItems = [];
let customerKontaktFilter = 'all';

let eventListenersAdded = false;

function getAuthHeaders() {
    const token = localStorage.getItem('access_token') || sessionStorage.getItem('access_token');
    return token ? { Authorization: `Bearer ${token}` } : {};
}

document.addEventListener('DOMContentLoaded', () => {
    if (eventListenersAdded) {
        console.log('Event listeners already added, skipping...');
        return;
    }
    
    loadCustomer();
    
    // Load contacts when tab is shown
    const contactsTab = document.querySelector('a[href="#contacts"]');
    if (contactsTab) {
        contactsTab.addEventListener('shown.bs.tab', () => {
            loadContacts();
        }, { once: false });
    }

    const casesTab = document.querySelector('a[href="#cases"]');
    if (casesTab) {
        casesTab.addEventListener('shown.bs.tab', () => {
            loadCustomerCases();
        }, { once: false });
    }

    const kontaktTab = document.querySelector('a[href="#kontakt"]');
    if (kontaktTab) {
        kontaktTab.addEventListener('shown.bs.tab', () => {
            loadCustomerKontakt();
        }, { once: false });
    }
    
    // Load subscriptions when tab is shown
    const subscriptionsTab = document.querySelector('a[href="#subscriptions"]');
    if (subscriptionsTab) {
        subscriptionsTab.addEventListener('shown.bs.tab', () => {
            loadSubscriptions();
            loadInternalComment();
        }, { once: false });
    }

    // Load pipeline when tab is shown
    const pipelineTab = document.querySelector('a[href="#pipeline"]');
    if (pipelineTab) {
        pipelineTab.addEventListener('shown.bs.tab', () => {
            loadCustomerPipeline();
        }, { once: false });
    }

    // Load locations when tab is shown
    const locationsTab = document.querySelector('a[href="#locations"]');
    if (locationsTab) {
        locationsTab.addEventListener('shown.bs.tab', () => {
            loadCustomerLocations();
        }, { once: false });
    }

    const internetConnectionsTab = document.querySelector('a[href="#internet-connections"]');
    if (internetConnectionsTab) {
        internetConnectionsTab.addEventListener('shown.bs.tab', () => {
            loadCustomerInternetConnections();
        }, { once: false });
    }

    // Load hardware when tab is shown
    const hardwareTab = document.querySelector('a[href="#hardware"]');
    if (hardwareTab) {
        hardwareTab.addEventListener('shown.bs.tab', () => {
            loadCustomerHardware();
        }, { once: false });
    }

    const linksTab = document.querySelector('a[href="#links"]');
    if (linksTab) {
        linksTab.addEventListener('shown.bs.tab', () => {
            loadCustomerLinks();
        }, { once: false });
    }
    
    // Load activity when tab is shown
    const activityTab = document.querySelector('a[href="#activity"]');
    if (activityTab) {
        activityTab.addEventListener('shown.bs.tab', () => {
            loadActivity();
        }, { once: false });
    }

    // Load conversations when tab is shown
    const conversationsTab = document.querySelector('a[href="#conversations"]');
    if (conversationsTab) {
        conversationsTab.addEventListener('shown.bs.tab', () => {
            loadConversations();
        }, { once: false });
    }

    // Load drift when tab is shown
    const driftTab = document.querySelector('a[href="#drift"]');
    if (driftTab) {
        driftTab.addEventListener('shown.bs.tab', () => {
            loadCustomerDrift();
        }, { once: false });
    }

    // Load Nextcloud status when tab is shown
    const nextcloudTab = document.querySelector('a[href="#nextcloud"]');
    if (nextcloudTab) {
        nextcloudTab.addEventListener('shown.bs.tab', () => {
            loadNextcloudStatus();
        }, { once: false });
    }

    // Load remote sessions when tab is shown
    const remoteSessionsTab = document.querySelector('a[href="#remote-sessions"]');
    if (remoteSessionsTab) {
        remoteSessionsTab.addEventListener('shown.bs.tab', () => {
            loadCustomerSessions();
        }, { once: false });
    }

    if (window.location.hash) {
        const hashTab = document.querySelector(`a[data-bs-toggle="tab"][href="${window.location.hash}"]`);
        if (hashTab && window.bootstrap?.Tab) {
            bootstrap.Tab.getOrCreateInstance(hashTab).show();
        }
    }
    
    eventListenersAdded = true;
});

async function loadCustomer() {
    try {
        const response = await fetch(`/api/v1/customers/${customerId}`);
        if (!response.ok) {
            throw new Error('Customer not found');
        }
        
        customerData = await response.json();
        displayCustomer(customerData);
        
        await loadUtilityCompany();
        await loadCustomerTags();
        await loadCustomerVendorLinks();

        // Check data consistency
        await checkDataConsistency();
    } catch (error) {
        console.error('Failed to load customer:', error);
        alert('Kunne ikke indlæse kunde');
        window.location.href = '/customers';
    }
}

async function loadCustomerVendorLinks() {
    const container = document.getElementById('customerVendorLinksContainer');
    const empty = document.getElementById('customerVendorLinksEmpty');
    const countEl = document.getElementById('customerVendorsCount');

    if (!container || !empty || !countEl) return;

    try {
        const response = await fetch(`/api/v1/customers/${customerId}/vendors`);
        if (!response.ok) throw new Error('Kunne ikke hente leverandørlinks');
        const links = await response.json();
        const rows = Array.isArray(links) ? links : [];

        countEl.textContent = String(rows.length);
        if (!rows.length) {
            container.innerHTML = '';
            empty.classList.remove('d-none');
            return;
        }

        empty.classList.add('d-none');
        container.innerHTML = rows.map((row) => `
            <div class="list-group-item d-flex justify-content-between align-items-center">
                <div>
                    <div class="fw-semibold">${escapeHtml(row.vendor_name || `Vendor #${row.vendor_id}`)}</div>
                    <div class="small text-muted">
                        ${row.vendor_cvr ? `CVR ${escapeHtml(row.vendor_cvr)} · ` : ''}
                        ${row.vendor_email ? escapeHtml(row.vendor_email) : '-'}
                    </div>
                </div>
                <div class="d-flex align-items-center gap-2">
                    <span class="badge bg-light text-dark border">${escapeHtml(row.relationship_type || 'supplier')}</span>
                    <a class="btn btn-sm btn-outline-primary" href="/vendors/${row.vendor_id}">
                        <i class="bi bi-box-arrow-up-right"></i>
                    </a>
                    <button class="btn btn-sm btn-outline-danger" onclick="unlinkVendorFromCustomer(${row.vendor_id})">
                        <i class="bi bi-x-lg"></i>
                    </button>
                </div>
            </div>
        `).join('');
    } catch (error) {
        console.error('Failed to load customer vendor links:', error);
        container.innerHTML = '';
        empty.classList.remove('d-none');
    }
}

let vendorSearchDebounce = null;
async function searchVendorsForCustomer(query) {
    const resultsEl = document.getElementById('customerVendorSearchResults');
    if (!resultsEl) return;

    const q = String(query || '').trim();
    if (!q) {
        resultsEl.style.display = 'none';
        resultsEl.innerHTML = '';
        return;
    }

    if (vendorSearchDebounce) window.clearTimeout(vendorSearchDebounce);
    vendorSearchDebounce = window.setTimeout(async () => {
        try {
            const response = await fetch(`/api/v1/vendors?search=${encodeURIComponent(q)}&limit=10`);
            if (!response.ok) throw new Error('Søgning fejlede');
            const vendors = await response.json();
            const rows = Array.isArray(vendors) ? vendors : [];

            if (!rows.length) {
                resultsEl.innerHTML = '<div class="list-group-item text-muted">Ingen leverandører fundet</div>';
                resultsEl.style.display = 'block';
                return;
            }

            resultsEl.innerHTML = rows.map((v) => `
                <div class="list-group-item d-flex justify-content-between align-items-center">
                    <div>
                        <div class="fw-semibold">${escapeHtml(v.name || '')}</div>
                        <div class="small text-muted">${v.cvr_number ? `CVR ${escapeHtml(v.cvr_number)} · ` : ''}${v.email ? escapeHtml(v.email) : '-'}</div>
                    </div>
                    <button class="btn btn-sm btn-primary" onclick="linkVendorToCustomerFromUI(${v.id})">
                        <i class="bi bi-link-45deg me-1"></i>Link
                    </button>
                </div>
            `).join('');
            resultsEl.style.display = 'block';
        } catch (error) {
            console.error('Vendor search failed:', error);
            resultsEl.innerHTML = '<div class="list-group-item text-danger">Søgning fejlede</div>';
            resultsEl.style.display = 'block';
        }
    }, 220);
}

async function linkVendorToCustomerFromUI(vendorId) {
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/vendors/${vendorId}?relationship_type=supplier`, {
            method: 'POST'
        });
        if (!response.ok) {
            const payload = await response.json().catch(() => ({}));
            throw new Error(payload.detail || 'Kunne ikke linke leverandør');
        }

        const input = document.getElementById('customerVendorSearch');
        const results = document.getElementById('customerVendorSearchResults');
        if (input) input.value = '';
        if (results) {
            results.innerHTML = '';
            results.style.display = 'none';
        }

        await loadCustomerVendorLinks();
        await loadCustomerTags();
    } catch (error) {
        alert(error.message || 'Kunne ikke linke leverandør');
    }
}

async function unlinkVendorFromCustomer(vendorId) {
    if (!confirm('Fjern link mellem kunde og leverandør?')) return;
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/vendors/${vendorId}`, {
            method: 'DELETE'
        });
        if (!response.ok) {
            const payload = await response.json().catch(() => ({}));
            throw new Error(payload.detail || 'Kunne ikke fjerne link');
        }
        await loadCustomerVendorLinks();
    } catch (error) {
        alert(error.message || 'Kunne ikke fjerne link');
    }
}

function displayCustomer(customer) {
    // Update page title
    document.title = `${customer.name} - BMC Hub`;
    
    // Bankruptcy Alert
    const bankruptcyAlert = document.getElementById('bankruptcyAlert');
    if (customer.bankruptcy_alert) {
        document.getElementById('bankruptcySubject').textContent = customer.bankruptcy_alert.subject;
        document.getElementById('bankruptcyDate').textContent = new Date(customer.bankruptcy_alert.received_date).toLocaleString('da-DK');
        document.getElementById('bankruptcyLink').href = `/emails?id=${customer.bankruptcy_alert.id}`;
        bankruptcyAlert.classList.remove('d-none');
        
        // Also add a badge to the header
        const extraBadge = document.createElement('span');
        extraBadge.className = 'badge bg-danger animate__animated animate__pulse animate__infinite ms-2';
        extraBadge.innerHTML = '<i class="bi bi-shield-exclamation me-1"></i>KONKURS';
        document.getElementById('customerStatus').parentNode.appendChild(extraBadge);
    } else {
        bankruptcyAlert.classList.add('d-none');
    }
    
    // Header
    document.getElementById('customerAvatar').textContent = getInitials(customer.name);
    document.getElementById('customerName').textContent = customer.name;
    document.getElementById('customerCity').textContent = customer.city || '';
    
    const statusBadge = customer.is_active 
        ? '<i class="bi bi-check-circle me-1"></i>Aktiv'
        : '<i class="bi bi-x-circle me-1"></i>Inaktiv';
    document.getElementById('customerStatus').innerHTML = statusBadge;
    
    const sourceBadge = customer.vtiger_id
        ? '<i class="bi bi-cloud me-1"></i>vTiger'
        : '<i class="bi bi-hdd me-1"></i>Lokal';
    document.getElementById('customerSource').innerHTML = sourceBadge;
    
    // BMC Låst badge
    const bmcLockedBadge = document.getElementById('bmcLockedBadge');
    if (customer.bmc_locked) {
        bmcLockedBadge.innerHTML = `
            <span class="badge bg-danger bg-opacity-90 px-3 py-2" style="font-size: 0.9rem;" title="Dette firma skal faktureres fra BMC">
                <i class="bi bi-lock-fill me-2"></i>
                <strong>BMC LÅST</strong>
            </span>
        `;
    } else {
        bmcLockedBadge.innerHTML = '';
    }
    
    // Company Information
    document.getElementById('cvrNumber').textContent = customer.cvr_number || '-';
    document.getElementById('address').textContent = customer.address || '-';
    document.getElementById('postalCity').textContent = customer.postal_code && customer.city 
        ? `${customer.postal_code} ${customer.city}` 
        : customer.city || '-';
    document.getElementById('email').textContent = customer.email || '-';
    document.getElementById('phone').innerHTML = renderCustomerCallNumber(customer.phone);
    document.getElementById('website').textContent = customer.website || '-';

    const wikiEl = document.getElementById('wikiLink');
    if (wikiEl) {
        const slug = (customer.wiki_slug || '').trim();
        if (slug) {
            const encoded = encodeURIComponent(slug);
            const url = `https://wiki.bmcnetworks.dk/en/Kunder/${encoded}/`;
            wikiEl.innerHTML = `<a href="${url}" target="_blank" rel="noopener">/en/Kunder/${escapeHtml(slug)}</a>`;
        } else {
            wikiEl.textContent = '-';
        }
    }
    
    // Economic Information
    document.getElementById('economicNumber').textContent = customer.economic_customer_number || '-';
    document.getElementById('paymentTerms').textContent = customer.payment_terms_days 
        ? `${customer.payment_terms_days} dage netto`
        : '-';
    document.getElementById('vatZone').textContent = customer.vat_zone || '-';
    document.getElementById('currency').textContent = customer.currency_code || 'DKK';
    document.getElementById('ean').textContent = customer.ean || '-';
    const standardMargin = customer.standard_margin_percent ?? customerDefaultMarginPercent;
    const invoiceFee = customer.invoice_fee_amount ?? customerDefaultInvoiceFee;
    const standardHourlyRate = customer.standard_hourly_rate ?? customerDefaultHourlyRate;
    const freight = customer.special_freight_price;

    document.getElementById('standardMarginPercent').textContent = `${Number(standardMargin).toFixed(2)} %`;
    document.getElementById('standardHourlyRate').textContent = `${Number(standardHourlyRate).toFixed(2)} DKK`;
    document.getElementById('specialFreightPrice').textContent = (freight === null || typeof freight === 'undefined')
        ? '-'
        : `${Number(freight).toFixed(2)} DKK`;
    document.getElementById('supplierServiceEnrolled').innerHTML = customer.supplier_service_enrolled
        ? '<span class="badge bg-success">Tilmeldt</span>'
        : '<span class="badge bg-secondary">Ikke tilmeldt</span>';
    document.getElementById('invoiceFeeAmount').textContent = Number(invoiceFee) === 0
        ? '0,00 DKK (deaktiveret)'
        : `${Number(invoiceFee).toFixed(2)} DKK`;
    document.getElementById('barred').innerHTML = customer.barred 
        ? '<span class="badge bg-danger">Ja</span>'
        : '<span class="badge bg-success">Nej</span>';
    
    // Integration
    document.getElementById('vtigerId').textContent = customer.vtiger_id || '-';
    document.getElementById('vtigerSyncAt').textContent = customer.vtiger_last_sync_at 
        ? new Date(customer.vtiger_last_sync_at).toLocaleString('da-DK')
        : '-';
    document.getElementById('economicSyncAt').textContent = customer.economic_last_sync_at
        ? new Date(customer.economic_last_sync_at).toLocaleString('da-DK')
        : '-';
    document.getElementById('createdAt').textContent = new Date(customer.created_at).toLocaleString('da-DK');
    
    // Load Alert Notes for this customer
    loadAndDisplayAlerts('customer', customer.id, 'inline', 'alert-notes-container');
}

function renderCustomerCallNumber(number) {
    const clean = normalizePhoneValue(number);
    if (!clean) return '-';
    return `
        <div class="d-flex gap-2 align-items-center justify-content-end flex-wrap">
            <span>${escapeHtml(clean)}</span>
            <button type="button" class="btn btn-sm btn-outline-success" onclick="customerDetailCallViaYealink('${escapeHtml(clean)}')">Ring op</button>
            <button type="button" class="btn btn-sm btn-outline-primary" onclick="openSmsPrompt('${escapeHtml(clean)}', '', null)">SMS</button>
        </div>
    `;
}

let customerDetailCurrentUserId = null;

async function ensureCustomerDetailCurrentUserId() {
    if (customerDetailCurrentUserId !== null) return customerDetailCurrentUserId;
    try {
        const res = await fetch('/api/v1/auth/me', { credentials: 'include' });
        if (!res.ok) return null;
        const me = await res.json();
        customerDetailCurrentUserId = Number(me?.id) || null;
        return customerDetailCurrentUserId;
    } catch (e) {
        return null;
    }
}

async function customerDetailCallViaYealink(number) {
    const clean = normalizePhoneValue(number);
    if (!clean) {
        alert('Intet gyldigt nummer at ringe til');
        return;
    }

    const userId = await ensureCustomerDetailCurrentUserId();
    try {
        const res = await fetch('/api/v1/telefoni/click-to-call', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            credentials: 'include',
            body: JSON.stringify({ number: clean, user_id: userId })
        });

        if (!res.ok) {
            const t = await res.text();
            alert('Ring ud fejlede: ' + t);
            return;
        }
        alert('Ringer ud via Yealink...');
    } catch (e) {
        alert('Kunne ikke starte opkald');
    }
}

async function loadCustomerTags() {
    try {
        const response = await fetch(`/api/v1/tags/entity/customer/${customerId}`);
        if (!response.ok) return;

        const tags = await response.json();
        const hasNextcloud = (tags || []).some(tag => (tag.name || '').toLowerCase() === 'nextcloud');

        const nextcloudNav = document.getElementById('nextcloudTabNav');
        const nextcloudPane = document.getElementById('nextcloud');

        if (hasNextcloud) {
            nextcloudNav?.classList.remove('d-none');
            nextcloudPane?.classList.remove('d-none');
        } else {
            nextcloudNav?.classList.add('d-none');
            nextcloudPane?.classList.add('d-none');
        }

        renderCustomerTags(tags || []);
    } catch (error) {
        console.error('Failed to load customer tags:', error);
    }
}

async function loadCustomerLocations() {
    const list = document.getElementById('customerLocationsList');
    const empty = document.getElementById('customerLocationsEmpty');

    if (!list || !empty) return;

    list.innerHTML = `
        <div class="text-center py-4">
            <div class="spinner-border text-primary"></div>
        </div>
    `;
    empty.classList.add('d-none');

    try {
        const response = await fetch(`/api/v1/locations/by-customer/${customerId}`);
        if (!response.ok) {
            throw new Error('Kunne ikke hente lokationer');
        }

        const locations = await response.json();
        if (!Array.isArray(locations) || locations.length === 0) {
            list.innerHTML = '';
            empty.classList.remove('d-none');
            return;
        }

        const typeLabels = {
            kompleks: 'Kompleks',
            bygning: 'Bygning',
            etage: 'Etage',
            customer_site: 'Kundesite',
            rum: 'Rum',
            kantine: 'Kantine',
            moedelokale: 'Mødelokale',
            vehicle: 'Køretøj'
        };

        const typeColors = {
            kompleks: '#0f4c75',
            bygning: '#1abc9c',
            etage: '#3498db',
            customer_site: '#9b59b6',
            rum: '#e67e22',
            kantine: '#d35400',
            moedelokale: '#16a085',
            vehicle: '#8e44ad'
        };

        list.innerHTML = locations.map(loc => {
            const typeLabel = typeLabels[loc.location_type] || loc.location_type || '-';
            const typeColor = typeColors[loc.location_type] || '#6c757d';
            const city = loc.address_city ? escapeHtml(loc.address_city) : '—';
            const parent = loc.parent_location_name ? ` · ${escapeHtml(loc.parent_location_name)}` : '';

            return `
                <a href="/app/locations/${loc.id}" class="list-group-item list-group-item-action">
                    <div class="d-flex justify-content-between align-items-center">
                        <div>
                            <div class="fw-semibold">${escapeHtml(loc.name)}${parent}</div>
                            <div class="text-muted small">${city}</div>
                        </div>
                        <span class="badge" style="background-color: ${typeColor}; color: white;">
                            ${typeLabel}
                        </span>
                    </div>
                </a>
            `;
        }).join('');
    } catch (error) {
        console.error('Failed to load locations:', error);
        list.innerHTML = '';
        empty.classList.remove('d-none');
    }
}

function renderCustomerTags(tags) {
    const container = document.getElementById('customerTagsContainer');
    const emptyState = document.getElementById('customerTagsEmpty');

    if (!container || !emptyState) return;

    if (!tags.length) {
        container.innerHTML = '';
        emptyState.classList.remove('d-none');
        return;
    }

    emptyState.classList.add('d-none');
    container.innerHTML = tags.map(tag => `
        <span class="badge" style="background:${tag.color || '#0f4c75'}; color: white;">
            ${escapeHtml(tag.name)}
            <button class="btn btn-sm btn-link text-white p-0 ms-2" onclick="removeCustomerTag(${tag.id})" title="Fjern tag">
                <i class="bi bi-x"></i>
            </button>
        </span>
    `).join('');
}

async function openCustomerTagModal() {
    const modal = new bootstrap.Modal(document.getElementById('customerTagModal'));
    await loadAllTags();
    modal.show();
}

async function loadAllTags() {
    try {
        const response = await fetch('/api/v1/tags?is_active=true');
        if (!response.ok) return;

        allTagsCache = await response.json();
        const currentTagsResponse = await fetch(`/api/v1/tags/entity/customer/${customerId}`);
        const currentTags = currentTagsResponse.ok ? await currentTagsResponse.json() : [];
        const currentTagIds = new Set(currentTags.map(tag => tag.id));

        const select = document.getElementById('customerTagSelect');
        if (!select) return;

        const options = allTagsCache
            .filter(tag => !currentTagIds.has(tag.id))
            .map(tag => `<option value="${tag.id}">${escapeHtml(tag.name)}</option>`)
            .join('');

        select.innerHTML = options || '<option value="">Ingen flere tags</option>';
    } catch (error) {
        console.error('Failed to load tags:', error);
    }
}

async function addCustomerTag() {
    const select = document.getElementById('customerTagSelect');
    if (!select || !select.value) return;

    const payload = {
        entity_type: 'customer',
        entity_id: customerId,
        tag_id: parseInt(select.value, 10)
    };

    try {
        const response = await fetch('/api/v1/tags/entity', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });

        if (!response.ok) {
            const error = await response.json();
            alert(error.detail || 'Kunne ikke tilføje tag');
            return;
        }

        bootstrap.Modal.getInstance(document.getElementById('customerTagModal')).hide();
        await loadCustomerTags();
    } catch (error) {
        console.error('Failed to add tag:', error);
    }
}

async function removeCustomerTag(tagId) {
    try {
        const response = await fetch(`/api/v1/tags/entity?entity_type=customer&entity_id=${customerId}&tag_id=${tagId}`, {
            method: 'DELETE'
        });

        if (!response.ok) {
            const error = await response.json();
            alert(error.detail || 'Kunne ikke fjerne tag');
            return;
        }

        await loadCustomerTags();
    } catch (error) {
        console.error('Failed to remove tag:', error);
    }
}

async function loadNextcloudStatus() {
    const statusBadge = document.getElementById('ncStatusBadge');
    const lastUpdated = document.getElementById('ncLastUpdated');
    const cpuLoad = document.getElementById('ncCpuLoad');
    const freeDisk = document.getElementById('ncFreeDisk');
    const ramUsage = document.getElementById('ncRamUsage');
    const opcache = document.getElementById('ncOpcache');
    const fileGrowth = document.getElementById('ncFileGrowth');
    const publicShares = document.getElementById('ncPublicShares');
    const activeUsers = document.getElementById('ncActiveUsers');
    const alerts = document.getElementById('ncAlerts');

    if (!statusBadge || !lastUpdated) return;

    statusBadge.className = 'badge bg-secondary';
    statusBadge.textContent = 'Henter...';
    lastUpdated.textContent = '-';

    try {
        const instanceResponse = await fetch(`/api/v1/nextcloud/customers/${customerId}/instance`);
        if (!instanceResponse.ok) {
            statusBadge.textContent = 'Ukendt';
            return;
        }

        const instance = await instanceResponse.json();
        if (!instance?.id) {
            statusBadge.textContent = 'Ikke konfigureret';
            return;
        }

        const response = await fetch(`/api/v1/nextcloud/instances/${instance.id}/status?customer_id=${customerId}`);
        if (!response.ok) {
            statusBadge.textContent = 'Ukendt';
            return;
        }

        const payload = await response.json();
        const isOnline = payload.status === 'online';

        statusBadge.className = `badge ${isOnline ? 'bg-success' : 'bg-warning text-dark'}`;
        statusBadge.textContent = isOnline ? 'Online' : 'Ukendt';
        lastUpdated.textContent = new Date().toLocaleString('da-DK');

        const info = payload.raw?.payload?.ocs?.data || {};
        const system = info?.nextcloud?.system || {};
        const sharesInfo = info?.nextcloud?.shares || {};
        const storageInfo = info?.nextcloud?.storage || {};
        const activeUsersInfo = info?.activeUsers || {};
        const phpInfo = info?.server?.php || {};
        const opcacheStats = phpInfo?.opcache?.opcache_statistics || {};

        const loadAvg = Array.isArray(system?.cpuload) ? system.cpuload : [];
        const cpuCores = system?.cpucount || system?.cpu_count || system?.num_cores || 0;
        const loadValue = loadAvg.length ? loadAvg[0] : null;
        const loadText = loadAvg.length ? loadAvg.map(v => Number(v).toFixed(2)).join(' / ') : '-';

        const memTotal = system?.mem_total || null;
        const memFree = system?.mem_free || null;
        const freeRamPct = memTotal && memFree ? (memFree / memTotal) * 100 : null;
        const ramUsageText = freeRamPct !== null ? `${(100 - freeRamPct).toFixed(1)} %` : '-';

        const freeDiskBytes = system?.freespace ?? null;
        const freeDiskText = freeDiskBytes !== null ? formatBytes(freeDiskBytes) : '-';

        const opcacheHitRate = opcacheStats?.opcache_hit_rate ?? null;
        const opcacheText = opcacheHitRate !== null ? `${Number(opcacheHitRate).toFixed(2)} %` : '-';

        if (cpuLoad) cpuLoad.textContent = loadText;
        if (freeDisk) freeDisk.textContent = freeDiskText;
        if (ramUsage) ramUsage.textContent = ramUsageText;
        if (opcache) opcache.textContent = opcacheText;
        if (activeUsers) activeUsers.textContent = activeUsersInfo?.last24hours ?? '-';

        // File count growth (localStorage diff)
        const fileCount = storageInfo?.num_files ?? null;
        if (fileGrowth) {
            if (fileCount === null) {
                fileGrowth.textContent = '-';
            } else {
                const key = `nextcloud_file_count_${instance.id}`;
                const prev = parseInt(localStorage.getItem(key) || '0', 10);
                const diff = prev ? fileCount - prev : 0;
                fileGrowth.textContent = prev ? `${fileCount} (${diff >= 0 ? '+' : ''}${diff})` : `${fileCount}`;
                localStorage.setItem(key, `${fileCount}`);
            }
        }

        // Public shares without password
        if (publicShares) {
            if (typeof sharesInfo?.num_shares_link_no_password !== 'undefined') {
                publicShares.textContent = `${sharesInfo.num_shares_link_no_password}`;
            } else {
                const sharesResponse = await fetch(`/api/v1/nextcloud/instances/${instance.id}/shares?customer_id=${customerId}`);
                if (sharesResponse.ok) {
                    const sharesPayload = await sharesResponse.json();
                    const list = sharesPayload?.payload?.ocs?.data || [];
                    const withoutPassword = list.filter(s => s.share_type === 3 && (!s.password || s.password === '')).length;
                    publicShares.textContent = `${withoutPassword}`;
                } else {
                    publicShares.textContent = '-';
                }
            }
        }

        if (alerts) {
            const items = [];
            if (freeDiskBytes !== null && freeDiskBytes <= 0) items.push('⚠️ Free disk kritisk');
            if (loadValue !== null && cpuCores && loadValue > cpuCores) items.push('⚠️ CPU load > cores');
            if (freeRamPct !== null && freeRamPct < 10) items.push('⚠️ Free RAM < 10%');
            if (opcacheHitRate !== null && opcacheHitRate < 95) items.push('⚠️ OPCache hit rate < 95%');
            const sharesText = publicShares?.textContent;
            if (sharesText && parseInt(sharesText, 10) > 0) items.push('⚠️ Public shares uden password');

            alerts.innerHTML = items.length
                ? items.map(text => `<span class="badge bg-warning text-dark">${text}</span>`).join('')
                : '<span class="badge bg-success">✅ Ingen alarmer</span>';
        }
    } catch (error) {
        console.error('Failed to load Nextcloud status:', error);
        statusBadge.textContent = 'Ukendt';
    }
}

function formatBytes(value) {
    if (value === null || typeof value === 'undefined') return '-';
    const units = ['B', 'KB', 'MB', 'GB', 'TB'];
    let size = Number(value);
    let unitIndex = 0;
    while (size >= 1024 && unitIndex < units.length - 1) {
        size /= 1024;
        unitIndex += 1;
    }
    return `${size.toFixed(1)} ${units[unitIndex]}`;
}

let nextcloudInstanceCache = null;

async function resolveNextcloudInstance() {
    if (nextcloudInstanceCache?.id) return nextcloudInstanceCache;
    const response = await fetch(`/api/v1/nextcloud/customers/${customerId}/instance`);
    if (!response.ok) return null;
    const instance = await response.json();
    if (!instance?.id) return null;
    nextcloudInstanceCache = instance;
    return instance;
}

async function loadNextcloudGroups() {
    const select = document.getElementById('ncCreateGroups');
    if (!select) return;

    select.innerHTML = '<option value="">Henter grupper...</option>';

    const instance = await resolveNextcloudInstance();
    if (!instance) {
        select.innerHTML = '<option value="">Ingen Nextcloud instance</option>';
        return;
    }

    try {
        const response = await fetch(`/api/v1/nextcloud/instances/${instance.id}/groups?customer_id=${customerId}`);
        if (!response.ok) {
            select.innerHTML = '<option value="">Kunne ikke hente grupper</option>';
            return;
        }

        const payload = await response.json();
        const groups = payload?.payload?.ocs?.data?.groups || payload?.groups || [];
        if (!Array.isArray(groups) || groups.length === 0) {
            select.innerHTML = '<option value="">Ingen grupper fundet</option>';
            return;
        }

        select.innerHTML = groups.map(group => `<option value="${escapeHtml(group)}">${escapeHtml(group)}</option>`).join('');
    } catch (error) {
        console.error('Failed to load Nextcloud groups:', error);
        select.innerHTML = '<option value="">Kunne ikke hente grupper</option>';
    }
}

async function loadNextcloudUsers(selectId, inputId, searchValue = '', requireSearch = false) {
    const select = document.getElementById(selectId);
    if (!select) return;

    if (requireSearch && !searchValue.trim()) {
        select.innerHTML = '<option value="">Skriv for at søge</option>';
        return;
    }

    select.innerHTML = '<option value="">Henter brugere...</option>';

    const instance = await resolveNextcloudInstance();
    if (!instance) {
        select.innerHTML = '<option value="">Ingen Nextcloud instance</option>';
        return;
    }

    try {
        const search = encodeURIComponent(searchValue.trim());
        const url = new URL(`/api/v1/nextcloud/instances/${instance.id}/users`, window.location.origin);
        url.searchParams.set('customer_id', customerId);
        url.searchParams.set('include_details', 'true');
        url.searchParams.set('limit', '200');
        if (search) url.searchParams.set('search', search);
        const response = await fetch(url.toString());
        if (!response.ok) {
            select.innerHTML = '<option value="">Kunne ikke hente brugere</option>';
            return;
        }

        const payload = await response.json();
        const users = payload?.users || [];
        if (!Array.isArray(users) || users.length === 0) {
            select.innerHTML = '<option value="">Ingen brugere fundet</option>';
            return;
        }

        const options = users
            .map(user => {
                const uid = escapeHtml(user.uid || '');
                const display = escapeHtml(user.display_name || '-');
                const email = escapeHtml(user.email || '-');
                const label = `${uid} - ${display} (${email})`;
                return `<option value="${uid}">${label}</option>`;
            })
            .join('');
        select.innerHTML = options;

        if (inputId) {
            const input = document.getElementById(inputId);
            if (input) {
                input.value = select.value || '';
            }

            if (!select.dataset.bound) {
                select.addEventListener('change', () => {
                    const target = document.getElementById(inputId);
                    if (target) target.value = select.value;
                });
                select.dataset.bound = 'true';
            }
        }
    } catch (error) {
        console.error('Failed to load Nextcloud users:', error);
        select.innerHTML = '<option value="">Kunne ikke hente brugere</option>';
    }
}

async function applyNextcloudUserGroups(uid) {
    if (!uid) return;
    const instance = await resolveNextcloudInstance();
    if (!instance) return;

    try {
        const response = await fetch(`/api/v1/nextcloud/instances/${instance.id}/users/${encodeURIComponent(uid)}?customer_id=${customerId}`);
        if (!response.ok) return;
        const payload = await response.json();
        const data = payload?.payload?.ocs?.data || {};
        const groups = Array.isArray(data.groups) ? data.groups : [];

        const groupSelect = document.getElementById('ncCreateGroups');
        if (!groupSelect) return;

        Array.from(groupSelect.options).forEach(option => {
            option.selected = groups.includes(option.value);
        });

        const displayInput = document.getElementById('ncCreateDisplayName');
        const emailInput = document.getElementById('ncCreateEmail');
        if (displayInput && !displayInput.value && data.displayname) {
            displayInput.value = data.displayname;
        }
        if (emailInput && !emailInput.value && data.email) {
            emailInput.value = data.email;
        }
    } catch (error) {
        console.error('Failed to apply Nextcloud groups:', error);
    }
}

async function openNextcloudCreateUser() {
    document.getElementById('ncCreateUid').value = '';
    document.getElementById('ncCreateDisplayName').value = '';
    document.getElementById('ncCreateEmail').value = '';
    const searchInput = document.getElementById('ncCreateSearch');
    const userSelect = document.getElementById('ncCreateUserSelect');

    if (searchInput) {
        searchInput.value = '';
        if (!searchInput.dataset.bound) {
            let createTimer = null;
            searchInput.addEventListener('input', () => {
                clearTimeout(createTimer);
                createTimer = setTimeout(() => {
                    loadNextcloudUsers('ncCreateUserSelect', null, searchInput.value, false);
                }, 300);
            });
            searchInput.dataset.bound = 'true';
        }
    }

    if (userSelect && !userSelect.dataset.bound) {
        userSelect.addEventListener('change', () => {
            const uid = userSelect.value;
            if (uid) applyNextcloudUserGroups(uid);
        });
        userSelect.dataset.bound = 'true';
    }

    await loadNextcloudGroups();
    await loadNextcloudUsers('ncCreateUserSelect', null, searchInput ? searchInput.value : '', false);
    const modal = new bootstrap.Modal(document.getElementById('nextcloudCreateUserModal'));
    modal.show();
}

function openNextcloudResetPassword() {
    document.getElementById('ncResetUid').value = '';
    document.getElementById('ncResetSendEmail').checked = true;
    const searchInput = document.getElementById('ncResetSearch');
    if (searchInput) {
        searchInput.value = '';
        if (!searchInput.dataset.bound) {
            let resetTimer = null;
            searchInput.addEventListener('input', () => {
                clearTimeout(resetTimer);
                resetTimer = setTimeout(() => {
                    loadNextcloudUsers('ncResetUserSelect', 'ncResetUid', searchInput.value, true);
                }, 300);
            });
            searchInput.dataset.bound = 'true';
        }
    }
    loadNextcloudUsers('ncResetUserSelect', 'ncResetUid', searchInput ? searchInput.value : '', true);
    const modal = new bootstrap.Modal(document.getElementById('nextcloudResetPasswordModal'));
    modal.show();
}

function openNextcloudDisableUser() {
    document.getElementById('ncDisableUid').value = '';
    const searchInput = document.getElementById('ncDisableSearch');
    if (searchInput) {
        searchInput.value = '';
        if (!searchInput.dataset.bound) {
            let disableTimer = null;
            searchInput.addEventListener('input', () => {
                clearTimeout(disableTimer);
                disableTimer = setTimeout(() => {
                    loadNextcloudUsers('ncDisableUserSelect', 'ncDisableUid', searchInput.value, true);
                }, 300);
            });
            searchInput.dataset.bound = 'true';
        }
    }
    loadNextcloudUsers('ncDisableUserSelect', 'ncDisableUid', searchInput ? searchInput.value : '', true);
    const modal = new bootstrap.Modal(document.getElementById('nextcloudDisableUserModal'));
    modal.show();
}

async function createNextcloudUser() {
    const uid = document.getElementById('ncCreateUid').value.trim();
    if (!uid) {
        alert('Brugernavn er påkrævet.');
        return;
    }

    const instance = await resolveNextcloudInstance();
    if (!instance) {
        alert('Ingen Nextcloud instance konfigureret for denne kunde.');
        return;
    }

    const groupsSelect = document.getElementById('ncCreateGroups');
    const groups = Array.from(groupsSelect.selectedOptions || []).map(opt => opt.value).filter(Boolean);

    const payload = {
        uid,
        display_name: document.getElementById('ncCreateDisplayName').value.trim() || null,
        email: document.getElementById('ncCreateEmail').value.trim() || null,
        groups,
        send_welcome: true
    };

    try {
        const response = await fetch(`/api/v1/nextcloud/instances/${instance.id}/users?customer_id=${customerId}`,
            {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(payload)
            }
        );

        const result = await response.json();
        if (!response.ok) {
            alert(result.detail || 'Kunne ikke oprette bruger.');
            return;
        }

        if (result.generated_password) {
            alert(`Bruger oprettet. Genereret password: ${result.generated_password}`);
        } else {
            alert('Bruger oprettet.');
        }

        bootstrap.Modal.getInstance(document.getElementById('nextcloudCreateUserModal')).hide();
    } catch (error) {
        console.error('Failed to create Nextcloud user:', error);
        alert('Kunne ikke oprette bruger.');
    }
}

async function resetNextcloudPassword() {
    const uid = document.getElementById('ncResetUid').value.trim();
    if (!uid) {
        alert('Brugernavn er påkrævet.');
        return;
    }

    const instance = await resolveNextcloudInstance();
    if (!instance) {
        alert('Ingen Nextcloud instance konfigureret for denne kunde.');
        return;
    }

    const payload = {
        send_email: document.getElementById('ncResetSendEmail').checked
    };

    try {
        const response = await fetch(`/api/v1/nextcloud/instances/${instance.id}/users/${encodeURIComponent(uid)}/reset-password?customer_id=${customerId}`,
            {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(payload)
            }
        );

        const result = await response.json();
        if (!response.ok) {
            alert(result.detail || 'Kunne ikke reset password.');
            return;
        }

        if (result.generated_password) {
            alert(`Password nulstillet. Genereret password: ${result.generated_password}`);
        } else {
            alert('Password nulstillet.');
        }

        bootstrap.Modal.getInstance(document.getElementById('nextcloudResetPasswordModal')).hide();
    } catch (error) {
        console.error('Failed to reset Nextcloud password:', error);
        alert('Kunne ikke reset password.');
    }
}

async function disableNextcloudUser() {
    const uid = document.getElementById('ncDisableUid').value.trim();
    if (!uid) {
        alert('Brugernavn er påkrævet.');
        return;
    }

    if (!confirm(`Er du sikker på, at du vil deaktivere brugeren ${uid}?`)) {
        return;
    }

    const instance = await resolveNextcloudInstance();
    if (!instance) {
        alert('Ingen Nextcloud instance konfigureret for denne kunde.');
        return;
    }

    try {
        const response = await fetch(`/api/v1/nextcloud/instances/${instance.id}/users/${encodeURIComponent(uid)}/disable?customer_id=${customerId}`,
            { method: 'POST' }
        );

        const result = await response.json();
        if (!response.ok) {
            alert(result.detail || 'Kunne ikke deaktivere bruger.');
            return;
        }

        alert('Bruger deaktiveret.');
        bootstrap.Modal.getInstance(document.getElementById('nextcloudDisableUserModal')).hide();
    } catch (error) {
        console.error('Failed to disable Nextcloud user:', error);
        alert('Kunne ikke deaktivere bruger.');
    }
}

async function loadUtilityCompany() {
    const nameEl = document.getElementById('utilityCompanyName');
    const contactEl = document.getElementById('utilityCompanyContact');
    if (!nameEl || !contactEl) return;

    if (!customerData?.address) {
        nameEl.textContent = 'Ingen adresse angivet';
        contactEl.textContent = 'Tilføj adresse for at hente netselskab';
        return;
    }

    nameEl.innerHTML = '<span class="spinner-border spinner-border-sm text-primary me-2" role="status" aria-hidden="true"></span>Henter netselskab...';
    contactEl.textContent = '';

    try {
        const response = await fetch(`/api/v1/customers/${customerId}/utility-company`);
        let payload = {};
        try {
            payload = await response.json();
        } catch (err) {
            console.warn('Utility payload could not be parsed', err);
        }

        if (!response.ok) {
            throw new Error(payload.detail || 'Fejl ved netselskabsopslag');
        }

        if (!payload.found) {
            nameEl.textContent = 'Netselskab ikke fundet';
            contactEl.textContent = payload.message || 'Kontroller adressen og prøv igen';
            return;
        }

        displayUtilityCompany(payload);
    } catch (error) {
        console.error('Error fetching utility company:', error);
        nameEl.textContent = 'Kunne ikke hente netselskab';
        contactEl.textContent = 'Prøv igen senere';
    }
}

function displayUtilityCompany(payload) {
    const nameEl = document.getElementById('utilityCompanyName');
    const contactEl = document.getElementById('utilityCompanyContact');
    if (!nameEl || !contactEl) return;

    const supplier = payload?.supplier;
    if (!supplier) {
        nameEl.textContent = 'Netselskab ikke fundet';
        contactEl.textContent = payload?.message || 'Ingen data fra API';
        return;
    }

    nameEl.textContent = supplier.name || 'Ukendt netselskab';

    const contactPieces = [];
    if (supplier.phone) {
        contactPieces.push(`Tlf. ${escapeHtml(supplier.phone)}`);
    }

    if (supplier.website) {
        const normalized = supplier.website.toLowerCase().startsWith('http')
            ? supplier.website
            : `https://${supplier.website}`;
        const href = escapeHtml(normalized);
        const label = escapeHtml(supplier.website);
        contactPieces.push(`<a href="${href}" target="_blank" rel="noreferrer noopener">${label}</a>`);
    }

    contactEl.innerHTML = contactPieces.length > 0 ? contactPieces.join(' • ') : 'Ingen kontaktinfo';
}

function normalizePhoneValue(value) {
    const clean = String(value || '').trim();
    if (!clean) return '';

    const lowered = clean.toLowerCase();
    if (clean === '-' || clean === '—' || lowered === 'n/a' || lowered === 'null' || lowered === 'none') {
        return '';
    }

    // Require at least one digit to treat value as a callable/SMS-capable number.
    if (!/[0-9]/.test(clean)) {
        return '';
    }

    return clean;
}

let customerContactsData = [];
let contactsSearchQuery = '';
let contactsOnlyCallable = false;
let contactsFilterControlsInitialized = false;

function getContactDisplayName(contact) {
    const firstName = String(contact.first_name || '').trim();
    const lastName = String(contact.last_name || '').trim();
    return [firstName, lastName].filter(Boolean).join(' ') || String(contact.name || '').trim() || '—';
}

function getContactPhoneValue(contact) {
    return normalizePhoneValue(contact.phone);
}

function getContactMobileValue(contact) {
    return normalizePhoneValue(contact.mobile || contact.mobile_phone);
}

function renderContactActionButtons(number, displayName, contactId) {
    const safeNumber = escapeHtml(number);
    const safeDisplayName = escapeHtml(displayName || '');
    const safeContactId = contactId || 'null';
    return `
        <div class="d-flex align-items-center gap-2 flex-wrap">
            <button type="button" class="btn btn-sm btn-outline-success btn-voip js-contact-voip" data-number="${safeNumber}">
                <i class="bi bi-telephone-outbound me-1"></i>VOIP
            </button>
            <button type="button" class="btn btn-sm btn-outline-primary" onclick="openSmsPrompt('${safeNumber}', '${safeDisplayName}', ${safeContactId})">SMS</button>
        </div>
    `;
}

function buildContactsRows(contacts) {
    return contacts.map(contact => {
        const displayName = getContactDisplayName(contact);
        const contactId = Number(contact.id) || null;
        const mobileValue = getContactMobileValue(contact);
        const phoneValue = getContactPhoneValue(contact);
        const titleValue = String(contact.title || contact.role || '').trim();
        const nameCell = contactId
            ? `<a class="contact-name-link" href="/contacts/${contactId}">${escapeHtml(displayName)}</a>`
            : escapeHtml(displayName);

        const email = contact.email ? `<a href="mailto:${contact.email}">${escapeHtml(contact.email)}</a>` : '—';
        const phone = phoneValue
            ? `<div class="contact-phone-wrap"><span class="contact-number"><a href="tel:${phoneValue}">${escapeHtml(phoneValue)}</a></span>${renderContactActionButtons(phoneValue, displayName, contactId)}</div>`
            : '—';
        const mobile = mobileValue
            ? `<div class="contact-mobile-wrap"><span class="contact-number"><a href="tel:${mobileValue}">${escapeHtml(mobileValue)}</a></span>${renderContactActionButtons(mobileValue, displayName, contactId)}</div>`
            : '—';
        const title = titleValue ? escapeHtml(titleValue) : '—';
        const primaryBadge = contact.is_primary ? '<span class="badge bg-primary primary-pill">Primær</span>' : '—';

        return `
            <tr>
                <td class="contact-name">${nameCell}</td>
                <td>${title}</td>
                <td class="contact-email">${email}</td>
                <td class="contact-number">${phone}</td>
                <td>${mobile}</td>
                <td>${primaryBadge}</td>
            </tr>
        `;
    }).join('');
}

function getFilteredContacts() {
    const query = contactsSearchQuery.toLowerCase();
    return customerContactsData.filter(contact => {
        const displayName = getContactDisplayName(contact);
        const phoneValue = getContactPhoneValue(contact);
        const mobileValue = getContactMobileValue(contact);
        const searchable = [
            displayName,
            String(contact.title || contact.role || ''),
            String(contact.email || ''),
            phoneValue,
            mobileValue
        ].join(' ').toLowerCase();

        const matchesQuery = !query || searchable.includes(query);
        const matchesCallable = !contactsOnlyCallable || Boolean(phoneValue || mobileValue);
        return matchesQuery && matchesCallable;
    });
}

function updateContactsResultCount(current, total) {
    const countEl = document.getElementById('contactsResultCount');
    if (!countEl) return;
    countEl.textContent = `${current} / ${total}`;
}

function bindContactVoipButtons() {
    document.querySelectorAll('.js-contact-voip').forEach((btn) => {
        btn.addEventListener('click', () => {
            const number = String(btn.getAttribute('data-number') || '').trim();
            customerDetailCallViaYealink(number);
        });
    });
}

function renderContactsFromState() {
    const container = document.getElementById('contactsContainer');
    if (!container) return;

    const renderContactsTable = (bodyHtml) => `
        <table class="table table-hover align-middle contacts-table">
            <thead>
                <tr>
                    <th>Navn</th>
                    <th>Titel</th>
                    <th>Email</th>
                    <th>Telefon</th>
                    <th>Mobil</th>
                    <th>Primær</th>
                </tr>
            </thead>
            <tbody>
                ${bodyHtml}
            </tbody>
        </table>
    `;

    if (!customerContactsData.length) {
        container.innerHTML = '<div class="text-center py-5 text-muted">Ingen kontakter endnu</div>';
        updateContactsResultCount(0, 0);
        return;
    }

    const filteredContacts = getFilteredContacts();
    updateContactsResultCount(filteredContacts.length, customerContactsData.length);

    if (!filteredContacts.length) {
        container.innerHTML = '<div class="text-center py-5 text-muted">Ingen kontakter matcher søgningen</div>';
        return;
    }

    container.innerHTML = renderContactsTable(buildContactsRows(filteredContacts));
    bindContactVoipButtons();
}

function initContactsFilterControls() {
    if (contactsFilterControlsInitialized) return;

    const searchInput = document.getElementById('contactsSearchInput');
    const callableBtn = document.getElementById('contactsOnlyCallableToggle');
    const clearBtn = document.getElementById('contactsClearFilters');

    if (!searchInput || !callableBtn || !clearBtn) return;

    const syncCallableBtn = () => {
        callableBtn.classList.toggle('btn-outline-secondary', !contactsOnlyCallable);
        callableBtn.classList.toggle('btn-primary', contactsOnlyCallable);
    };

    searchInput.addEventListener('input', (event) => {
        contactsSearchQuery = String(event.target.value || '').trim();
        renderContactsFromState();
    });

    callableBtn.addEventListener('click', () => {
        contactsOnlyCallable = !contactsOnlyCallable;
        syncCallableBtn();
        renderContactsFromState();
    });

    clearBtn.addEventListener('click', () => {
        contactsSearchQuery = '';
        contactsOnlyCallable = false;
        searchInput.value = '';
        syncCallableBtn();
        renderContactsFromState();
    });

    syncCallableBtn();
    contactsFilterControlsInitialized = true;
}

async function loadContacts() {
    const container = document.getElementById('contactsContainer');

    initContactsFilterControls();

    const renderContactsTable = (bodyHtml) => `
        <table class="table table-hover align-middle contacts-table">
            <thead>
                <tr>
                    <th>Navn</th>
                    <th>Titel</th>
                    <th>Email</th>
                    <th>Telefon</th>
                    <th>Mobil</th>
                    <th>Primær</th>
                </tr>
            </thead>
            <tbody>
                ${bodyHtml}
            </tbody>
        </table>
    `;

    container.innerHTML = `
        ${renderContactsTable(`
            <tr>
                <td colspan="6" class="text-center py-4">
                    <div class="spinner-border text-primary"></div>
                </td>
            </tr>
        `)}
    `;
    
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/contacts`);
        const contacts = await response.json();
        customerContactsData = Array.isArray(contacts) ? contacts : [];
        renderContactsFromState();
    } catch (error) {
        console.error('Failed to load contacts:', error);
        customerContactsData = [];
        updateContactsResultCount(0, 0);
        container.innerHTML = '<div class="text-center py-5 text-danger">Kunne ikke indlæse kontakter</div>';
    }
}

async function loadCustomerCases() {
    const container = document.getElementById('customerCasesContainer');
    const empty = document.getElementById('customerCasesEmpty');

    if (!container || !empty) {
        return;
    }

    container.classList.remove('d-none');
    empty.classList.add('d-none');

    container.innerHTML = `
        <table class="table table-hover align-middle mb-0">
            <thead class="table-light">
                <tr>
                    <th>SagsID</th>
                    <th>Titel</th>
                    <th>Status</th>
                    <th>Prioritet</th>
                    <th>Oprettet</th>
                    <th class="text-end">Handling</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td colspan="6" class="text-center py-4">
                        <div class="spinner-border text-primary"></div>
                    </td>
                </tr>
            </tbody>
        </table>
    `;

    try {
        const response = await fetch(`/api/v1/sag?customer_id=${customerId}`);
        const cases = await response.json();

        if (!response.ok) {
            throw new Error(cases?.detail || 'Kunne ikke hente kundens sager');
        }

        const list = Array.isArray(cases) ? cases : [];

        if (!list.length) {
            container.classList.add('d-none');
            empty.classList.remove('d-none');
            return;
        }

        const rows = list.map((item) => {
            const id = Number(item.id) || 0;
            const title = escapeHtml(item.titel || '-');
            const statusRaw = String(item.status || 'ukendt');
            const statusLabel = escapeHtml(statusRaw);
            const priority = escapeHtml(item.priority || 'normal');
            const created = item.created_at ? new Date(item.created_at).toLocaleDateString('da-DK') : '-';

            const statusClass =
                statusRaw.toLowerCase() === 'lukket' ? 'bg-success-subtle text-success-emphasis' :
                statusRaw.toLowerCase() === 'afventer' ? 'bg-warning-subtle text-warning-emphasis' :
                'bg-primary-subtle text-primary-emphasis';

            return `
                <tr>
                    <td><a href="/sag/${id}/v3" class="fw-semibold text-decoration-none">#${id}</a></td>
                    <td>${title}</td>
                    <td><span class="badge ${statusClass}">${statusLabel}</span></td>
                    <td><span class="badge bg-light text-dark border">${priority}</span></td>
                    <td>${created}</td>
                    <td class="text-end">
                        <a class="btn btn-sm btn-outline-primary" href="/sag/${id}/v3" title="Åbn sag">
                            <i class="bi bi-arrow-right"></i>
                        </a>
                    </td>
                </tr>
            `;
        }).join('');

        container.innerHTML = `
            <table class="table table-hover align-middle mb-0">
                <thead class="table-light">
                    <tr>
                        <th>SagsID</th>
                        <th>Titel</th>
                        <th>Status</th>
                        <th>Prioritet</th>
                        <th>Oprettet</th>
                        <th class="text-end">Handling</th>
                    </tr>
                </thead>
                <tbody>
                    ${rows}
                </tbody>
            </table>
        `;
    } catch (error) {
        console.error('Failed to load customer cases:', error);
        container.innerHTML = `<div class="alert alert-danger mb-0"><i class="bi bi-exclamation-circle me-2"></i>${escapeHtml(error.message || 'Fejl ved hentning af sager')}</div>`;
    }
}

let subscriptionsLoaded = false;

async function loadSubscriptions() {
    const container = document.getElementById('subscriptionsContainer');
    
    // Prevent duplicate loads
    if (subscriptionsLoaded && container.innerHTML.includes('row g-4')) {
        console.log('Subscriptions already loaded, skipping...');
        return;
    }
    
    container.innerHTML = '<div class="text-center py-5"><div class="spinner-border text-primary"></div><p class="text-muted mt-3">Henter data fra vTiger...</p></div>';
    
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/subscriptions`);
        const data = await response.json();
        
        console.log('Loaded subscriptions:', data);
        
        if (!response.ok) {
            throw new Error(data.detail || 'Failed to load subscriptions');
        }
        
        if (data.status === 'no_vtiger_link') {
            container.innerHTML = `
                <div class="alert alert-warning">
                    <i class="bi bi-exclamation-triangle me-2"></i>
                    ${data.message}
                </div>
            `;
            return;
        }
        
        displaySubscriptions(data);
        subscriptionsLoaded = true;
    } catch (error) {
        console.error('Failed to load subscriptions:', error);
        container.innerHTML = '<div class="alert alert-danger">Kunne ikke indlæse abonnementer</div>';
    }
}

async function loadPipelineStages() {
    if (pipelineStages.length > 0) return;
    const response = await fetch('/api/v1/pipeline/stages');
    pipelineStages = await response.json();

    const select = document.getElementById('customerOpportunityStage');
    if (select) {
        select.innerHTML = pipelineStages.map(stage => `<option value="${stage.id}">${stage.name}</option>`).join('');
    }
}

async function loadCustomerPipeline() {
    await loadPipelineStages();
    const response = await fetch(`/api/v1/opportunities?customer_id=${customerId}`);
    const opportunities = await response.json();
    renderCustomerPipeline(opportunities);
}

let customerHardware = [];
let hardwareLocationsById = {};
let customerLinks = [];

function getHardwareGroupLabel(item, groupBy) {
    if (groupBy === 'location') {
        return item.location_name || 'Ukendt lokation';
    }
    if (groupBy === 'type') {
        return item.asset_type ? item.asset_type.replace('_', ' ') : 'Ukendt type';
    }
    if (groupBy === 'model') {
        const brand = item.brand || '';
        const model = item.model || '';
        const label = `${brand} ${model}`.trim();
        return label || 'Ukendt model';
    }
    if (groupBy === 'vendor') {
        return item.brand || 'Ukendt leverandør';
    }
    return 'Ukendt';
}

function renderHardwareTable(groupBy) {
    const container = document.getElementById('customerHardwareContainer');
    const empty = document.getElementById('customerHardwareEmpty');

    if (!container || !empty) return;

    if (!customerHardware.length) {
        container.classList.add('d-none');
        empty.classList.remove('d-none');
        return;
    }

    container.classList.remove('d-none');
    empty.classList.add('d-none');

    const grouped = {};
    customerHardware.forEach(item => {
        const label = getHardwareGroupLabel(item, groupBy);
        if (!grouped[label]) {
            grouped[label] = [];
        }
        grouped[label].push(item);
    });

    const sortedGroups = Object.keys(grouped).sort((a, b) => a.localeCompare(b, 'da-DK'));

    const rows = sortedGroups.map(group => {
        const items = grouped[group];
        const groupRow = `
            <tr class="table-secondary">
                <td colspan="6" class="fw-semibold">${escapeHtml(group)} (${items.length})</td>
            </tr>
        `;

        const itemRows = items.map(item => {
            const assetLabel = `${item.brand || ''} ${item.model || ''}`.trim() || 'Ukendt hardware';
            const serial = item.serial_number || '—';
            const location = item.location_name || '—';
            const status = item.status || '—';

            return `
                <tr>
                    <td class="fw-semibold">${escapeHtml(assetLabel)}</td>
                    <td>${escapeHtml(item.asset_type || '—')}</td>
                    <td>${escapeHtml(serial)}</td>
                    <td>${escapeHtml(location)}</td>
                    <td>${escapeHtml(status)}</td>
                    <td class="text-end">
                        <a class="btn btn-sm btn-outline-primary" href="/hardware/${item.id}">
                            <i class="bi bi-eye"></i>
                        </a>
                    </td>
                </tr>
            `;
        }).join('');

        return groupRow + itemRows;
    }).join('');

    container.innerHTML = `
        <table class="table table-hover align-middle mb-0">
            <thead class="table-light">
                <tr>
                    <th>Hardware</th>
                    <th>Type</th>
                    <th>Serienr.</th>
                    <th>Lokation</th>
                    <th>Status</th>
                    <th class="text-end">Handling</th>
                </tr>
            </thead>
            <tbody>
                ${rows}
            </tbody>
        </table>
    `;
}

async function loadCustomerHardware() {
    const container = document.getElementById('customerHardwareContainer');
    const empty = document.getElementById('customerHardwareEmpty');
    const groupBySelect = document.getElementById('hardwareGroupBy');

    if (!container || !empty || !groupBySelect) return;

    container.classList.remove('d-none');
    empty.classList.add('d-none');
    container.innerHTML = `
        <table class="table table-hover align-middle mb-0">
            <thead class="table-light">
                <tr>
                    <th>Hardware</th>
                    <th>Type</th>
                    <th>Serienr.</th>
                    <th>Lokation</th>
                    <th>Status</th>
                    <th class="text-end">Handling</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td colspan="6" class="text-center py-4">
                        <div class="spinner-border text-primary"></div>
                    </td>
                </tr>
            </tbody>
        </table>
    `;

    try {
        const response = await fetch(`/api/v1/hardware?customer_id=${customerId}`);
        if (!response.ok) {
            throw new Error('Kunne ikke hente hardware');
        }
        const hardware = await response.json();
        customerHardware = Array.isArray(hardware) ? hardware : [];

        const locationIds = customerHardware
            .map(item => item.current_location_id)
            .filter(id => id !== null && id !== undefined);

        hardwareLocationsById = {};
        if (locationIds.length > 0) {
            const uniqueIds = Array.from(new Set(locationIds));
            const locationsResponse = await fetch(`/api/v1/locations/by-ids?ids=${uniqueIds.join(',')}`);
            if (locationsResponse.ok) {
                const locations = await locationsResponse.json();
                (locations || []).forEach(loc => {
                    hardwareLocationsById[loc.id] = loc.name;
                });
            }
        }

        customerHardware = customerHardware.map(item => ({
            ...item,
            location_name: hardwareLocationsById[item.current_location_id] || item.location_name || null
        }));

        renderHardwareTable(groupBySelect.value || 'location');
    } catch (error) {
        console.error('Failed to load hardware:', error);
        container.classList.add('d-none');
        empty.classList.remove('d-none');
    }
}

document.addEventListener('change', (event) => {
    if (event.target && event.target.id === 'hardwareGroupBy') {
        renderHardwareTable(event.target.value);
    }
});

function renderCustomerLinksTable() {
    const container = document.getElementById('customerLinksContainer');
    const empty = document.getElementById('customerLinksEmpty');
    if (!container || !empty) return;

    if (!customerLinks.length) {
        container.classList.add('d-none');
        empty.classList.remove('d-none');
        return;
    }

    container.classList.remove('d-none');
    empty.classList.add('d-none');

    container.innerHTML = `
        <table class="table table-hover align-middle mb-0">
            <thead class="table-light">
                <tr>
                    <th>Navn</th>
                    <th>Type</th>
                    <th>Mål</th>
                    <th>Miljø</th>
                    <th class="text-end">Handling</th>
                </tr>
            </thead>
            <tbody>
                ${customerLinks.map((link) => {
                    const type = (link.type || 'http').toUpperCase();
                    const target = link.url || link.host || '-';
                    const environment = link.environment || 'prod';
                    return `
                        <tr>
                            <td class="fw-semibold">${escapeHtml(link.name || 'Uden navn')}</td>
                            <td><span class="badge text-bg-secondary">${escapeHtml(type)}</span></td>
                            <td>${escapeHtml(target)}</td>
                            <td>${escapeHtml(environment)}</td>
                            <td class="text-end">
                                <a class="btn btn-sm btn-outline-primary" href="/links?customer_id=${customerId}">
                                    <i class="bi bi-box-arrow-up-right"></i>
                                </a>
                            </td>
                        </tr>
                    `;
                }).join('')}
            </tbody>
        </table>
    `;
}

async function loadCustomerLinks() {
    const container = document.getElementById('customerLinksContainer');
    const empty = document.getElementById('customerLinksEmpty');
    if (!container || !empty) return;

    container.classList.remove('d-none');
    empty.classList.add('d-none');
    container.innerHTML = `
        <table class="table table-hover align-middle mb-0">
            <thead class="table-light">
                <tr>
                    <th>Navn</th>
                    <th>Type</th>
                    <th>Mål</th>
                    <th>Miljø</th>
                    <th class="text-end">Handling</th>
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td colspan="5" class="text-center py-4"><div class="spinner-border text-primary"></div></td>
                </tr>
            </tbody>
        </table>
    `;

    try {
        const response = await fetch(`/api/v1/links?customer_id=${customerId}`, {
            headers: {
                ...getAuthHeaders()
            },
            credentials: 'include'
        });
        if (!response.ok) {
            if (response.status === 401 || response.status === 403) {
                throw new Error('Ingen adgang til links. Log ind igen eller tjek links.read permission.');
            }
            if (response.status === 404) {
                throw new Error('Links-endpoint ikke fundet (modul ikke aktivt eller API ikke genstartet).');
            }
            throw new Error('Kunne ikke hente links');
        }

        const links = await response.json();
        customerLinks = Array.isArray(links) ? links : [];
        renderCustomerLinksTable();
    } catch (error) {
        console.error('Failed to load customer links:', error);
        container.classList.add('d-none');
        empty.classList.remove('d-none');
        empty.textContent = error.message || 'Kunne ikke hente links for kunden';
    }
}

function renderCustomerPipeline(opportunities) {
    const tbody = document.getElementById('customerOpportunitiesTable');
    if (!opportunities || opportunities.length === 0) {
        tbody.innerHTML = '<tr><td colspan="5" class="text-center text-muted py-4">Ingen muligheder endnu</td></tr>';
        return;
    }

    tbody.innerHTML = opportunities.map(o => `
        <tr>
            <td class="fw-semibold">${escapeHtml(o.title)}</td>
            <td>${formatCurrency(o.amount, o.currency)}</td>
            <td>
                <span class="badge" style="background:${o.stage_color || '#0f4c75'}; color: white;">${escapeHtml(o.stage_name || '-')}</span>
            </td>
            <td>${o.probability || 0}%</td>
            <td class="text-end">
                <button class="btn btn-sm btn-outline-primary" onclick="window.location.href='/opportunities/${o.id}'">
                    <i class="bi bi-arrow-right"></i>
                </button>
            </td>
        </tr>
    `).join('');
}

function openCustomerOpportunityModal() {
    const form = document.getElementById('customerOpportunityForm');
    if (form) form.reset();
    loadPipelineStages();
    const modal = new bootstrap.Modal(document.getElementById('customerOpportunityModal'));
    modal.show();
}

async function createCustomerOpportunity() {
    const payload = {
        customer_id: customerId,
        title: document.getElementById('customerOpportunityTitle').value,
        description: document.getElementById('customerOpportunityDescription').value || null,
        amount: parseFloat(document.getElementById('customerOpportunityAmount').value || 0),
        currency: document.getElementById('customerOpportunityCurrency').value || 'DKK',
        stage_id: parseInt(document.getElementById('customerOpportunityStage').value || 0) || null,
        expected_close_date: document.getElementById('customerOpportunityCloseDate').value || null
    };

    if (!payload.title) {
        alert('Titel er påkrævet');
        return;
    }

    const response = await fetch('/api/v1/opportunities', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(payload)
    });

    if (!response.ok) {
        alert('Kunne ikke oprette mulighed');
        return;
    }

    bootstrap.Modal.getInstance(document.getElementById('customerOpportunityModal')).hide();
    loadCustomerPipeline();
}

function displaySubscriptions(data) {
    const container = document.getElementById('subscriptionsContainer');
    const { recurring_orders, sales_orders, subscriptions, expired_subscriptions, bmc_office_subscriptions } = data;
    
    // Store subscriptions for editing
    currentSubscriptions = subscriptions || [];
    
    const totalItems = (sales_orders?.length || 0) + (subscriptions?.length || 0) + (bmc_office_subscriptions?.length || 0);
    
    if (totalItems === 0) {
        container.innerHTML = '<div class="text-center text-muted py-5">Ingen abonnementer eller salgsordre fundet</div>';
        return;
    }
    
    // Create 3-column layout
    let html = '<div class="row g-3">';
    
    const isLocked = customerData?.subscriptions_locked || false;
    
    // Column 1: vTiger Subscriptions
    html += `
        <div class="col-lg-4">
            <div class="subscription-column">
                <div class="column-header bg-primary bg-opacity-10 border-start border-primary border-4 p-3 mb-3 rounded">
                    <div class="d-flex justify-content-between align-items-start">
                        <div>
                            <h5 class="fw-bold mb-1">
                                <i class="bi bi-arrow-repeat text-primary me-2"></i>
                                vTiger Abonnementer
                                ${isLocked ? '<i class="bi bi-lock-fill text-danger ms-2" title="Abonnementer låst"></i>' : ''}
                            </h5>
                            <small class="text-muted">Fra vTiger Cloud</small>
                        </div>
                        <button class="btn btn-sm ${isLocked ? 'btn-danger' : 'btn-outline-secondary'}" 
                                onclick="toggleSubscriptionsLock()" 
                                title="${isLocked ? 'Lås op' : 'Lås abonnementer'}">
                            <i class="bi bi-${isLocked ? 'unlock' : 'lock'}-fill"></i>
                            ${isLocked ? 'Låst' : 'Lås'}
                        </button>
                    </div>
                </div>
                ${isLocked ? '<div class="alert alert-warning small mb-3"><i class="bi bi-lock-fill me-2"></i>Abonnementer er låst - kan kun redigeres i vTiger</div>' : ''}
                ${renderSubscriptionsList(subscriptions || [], isLocked)}
            </div>
        </div>

    `;
    
    // Column 2: Sales Orders
    html += `
        <div class="col-lg-4">
            <div class="subscription-column">
                <div class="column-header bg-success bg-opacity-10 border-start border-success border-4 p-3 mb-3 rounded">
                    <h5 class="fw-bold mb-1">
                        <i class="bi bi-cart-check text-success me-2"></i>
                        Åbne Salgsordre
                    </h5>
                    <small class="text-muted">Fra Simply-CRM</small>
                </div>
                ${renderSalesOrdersList(sales_orders || [])}
            </div>
        </div>
    `;
    
    // Column 3: BMC Office Subscriptions
    html += `
        <div class="col-lg-4">
            <div class="subscription-column">
                <div class="column-header bg-info bg-opacity-10 border-start border-info border-4 p-3 mb-3 rounded">
                    <h5 class="fw-bold mb-1">
                        <i class="bi bi-database text-info me-2"></i>
                        BMC Office Abonnementer
                    </h5>
                    <small class="text-muted">Fra lokalt system</small>
                </div>
                ${renderBmcOfficeSubscriptionsList(bmc_office_subscriptions || [])}
            </div>
        </div>
    `;
    
    html += '</div>';
    
    // Add comparison stats at bottom
    const subTotal = subscriptions?.reduce((sum, sub) => sum + parseFloat(sub.hdnGrandTotal || 0), 0) || 0;
    const orderTotal = sales_orders?.reduce((sum, order) => sum + parseFloat(order.hdnGrandTotal || 0), 0) || 0;
    const bmcOfficeTotal = bmc_office_subscriptions?.reduce((sum, sub) => sum + parseFloat(sub.total_inkl_moms || 0), 0) || 0;
    
    if (totalItems > 0) {
        html += `
            <div class="row g-4 mt-2">
                <div class="col-12">
                    <div class="info-card bg-light">
                        <h6 class="fw-bold mb-3">Sammenligning</h6>
                        <div class="row text-center">
                            <div class="col-md-3">
                                <div class="stat-item">
                                    <div class="text-muted small">vTiger Abonnementer</div>
                                    <div class="fs-4 fw-bold text-primary">${subscriptions?.length || 0}</div>
                                    <div class="text-muted small">${subTotal.toFixed(2)} DKK</div>
                                </div>
                            </div>
                            <div class="col-md-3">
                                <div class="stat-item">
                                    <div class="text-muted small">Åbne Salgsordre</div>
                                    <div class="fs-4 fw-bold text-success">${sales_orders?.length || 0}</div>
                                    <div class="text-muted small">${orderTotal.toFixed(2)} DKK</div>
                                </div>
                            </div>
                            <div class="col-md-3">
                                <div class="stat-item">
                                    <div class="text-muted small">BMC Office Abonnementer</div>
                                    <div class="fs-4 fw-bold text-info">${bmc_office_subscriptions?.length || 0}</div>
                                    <div class="text-muted small">${bmcOfficeTotal.toFixed(2)} DKK</div>
                                </div>
                            </div>
                            <div class="col-md-3">
                                <div class="stat-item">
                                    <div class="text-muted small">Total Værdi</div>
                                    <div class="fs-4 fw-bold text-dark">${(subTotal + orderTotal + bmcOfficeTotal).toFixed(2)} DKK</div>
                                    <div class="text-muted small">Samlet omsætning</div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        `;
    }
    
    container.innerHTML = html;
}

function renderRecurringOrdersList(orders) {
    if (!orders || orders.length === 0) {
        return '<p class="text-muted small">Ingen tilbagevendende ordrer</p>';
    }
    
    return orders.map((order, idx) => {
        const itemId = `recurring-${idx}`;
        const lineItems = order.lineItems || [];
        const hasLineItems = Array.isArray(lineItems) && lineItems.length > 0;
        
        return `
        <div class="border-bottom pb-3 mb-3">
            <div class="d-flex justify-content-between align-items-start mb-2" style="cursor: pointer;" onclick="toggleLineItems('${itemId}')">
                <div class="fw-bold">
                    <i class="bi bi-chevron-right me-1" id="${itemId}-icon"></i>
                    ${escapeHtml(order.subject || order.salesorder_no || 'Unnamed')}
                </div>
                <span class="badge bg-${getStatusColor(order.sostatus)}">${escapeHtml(order.sostatus || 'Open')}</span>
            </div>
            ${order.description ? `<p class="text-muted small mb-2">${escapeHtml(order.description).substring(0, 100)}...</p>` : ''}
            <div class="d-flex gap-3 small text-muted flex-wrap">
                ${order.recurring_frequency ? `<span><i class="bi bi-arrow-repeat me-1"></i>${escapeHtml(order.recurring_frequency)}</span>` : ''}
                ${order.start_period ? `<span><i class="bi bi-calendar-event me-1"></i>${formatDate(order.start_period)}</span>` : ''}
                ${order.end_period ? `<span><i class="bi bi-calendar-x me-1"></i>${formatDate(order.end_period)}</span>` : ''}
                ${order.hdnGrandTotal ? `<span><i class="bi bi-currency-dollar me-1"></i>${parseFloat(order.hdnGrandTotal).toFixed(2)} DKK</span>` : ''}
            </div>
            ${hasLineItems ? `
            <div id="${itemId}-lines" class="mt-3 ps-3" style="display: none;">
                <div class="small">
                    <strong>Produktlinjer:</strong>
                    ${lineItems.map(line => `
                        <div class="border-start border-2 border-primary ps-2 py-1 mt-2">
                            <div class="fw-bold">${escapeHtml(line.product_name || line.productid)}</div>
                            <div class="text-muted">
                                Antal: ${line.quantity || 0} × ${parseFloat(line.listprice || 0).toFixed(2)} DKK = 
                                <strong>${parseFloat(line.netprice || 0).toFixed(2)} DKK</strong>
                            </div>
                            ${line.comment ? `<div class="text-muted small">${escapeHtml(line.comment)}</div>` : ''}
                        </div>
                    `).join('')}
                </div>
            </div>
            ` : ''}
        </div>
        `;
    }).join('');
}

function renderSalesOrdersList(orders) {
    if (!orders || orders.length === 0) {
        return '<div class="text-center text-muted py-4"><i class="bi bi-inbox fs-1 d-block mb-2"></i>Ingen salgsordre</div>';
    }
    
    return orders.map((order, idx) => {
        const itemId = `salesorder-${idx}`;
        const lineItems = order.lineItems || [];
        const hasLineItems = Array.isArray(lineItems) && lineItems.length > 0;
        const total = parseFloat(order.hdnGrandTotal || 0);
        const recordId = order.id.includes('x') ? order.id.split('x')[1] : order.id;
        const simplycrmUrl = `https://bmcnetworks.simply-crm.dk/index.php?module=SalesOrder&view=Detail&record=${recordId}`;
        
        return `
        <div class="subscription-item border rounded p-3 mb-3 bg-white shadow-sm">
            <div class="d-flex justify-content-between align-items-start mb-2">
                <div class="flex-grow-1" style="cursor: pointer;" onclick="toggleLineItems('${itemId}')">
                    <div class="fw-bold d-flex align-items-center">
                        <i class="bi bi-chevron-right me-2 text-success" id="${itemId}-icon" style="font-size: 0.8rem;"></i>
                        ${escapeHtml(order.subject || order.salesorder_no || 'Unnamed')}
                    </div>
                    <div class="small text-muted mt-1">
                        ${order.salesorder_no ? `#${escapeHtml(order.salesorder_no)}` : ''}
                    </div>
                </div>
                <div class="text-end ms-3">
                    <div class="btn-group btn-group-sm mb-2" role="group">
                        <a href="${simplycrmUrl}" target="_blank" class="btn btn-outline-success" title="Åbn i Simply-CRM">
                            <i class="bi bi-box-arrow-up-right"></i> Simply-CRM
                        </a>
                    </div>
                    <div>
                        <div class="badge bg-${getStatusColor(order.sostatus)} mb-1">${escapeHtml(order.sostatus || 'Open')}</div>
                        <div class="fw-bold text-success">${total.toFixed(2)} DKK</div>
                    </div>
                </div>
            </div>
            
            <div class="d-flex gap-2 flex-wrap small text-muted mt-2">
                ${order.recurring_frequency ? `<span class="badge bg-light text-dark"><i class="bi bi-arrow-repeat me-1"></i>${escapeHtml(order.recurring_frequency)}</span>` : ''}
                ${order.last_recurring_date ? `<span class="badge bg-info text-dark"><i class="bi bi-calendar-check me-1"></i>Sidste: ${formatDate(order.last_recurring_date)}</span>` : ''}
                ${order.start_period && order.end_period ? `<span class="badge bg-light text-dark"><i class="bi bi-calendar-range me-1"></i>${formatDate(order.start_period)} - ${formatDate(order.end_period)}</span>` : ''}
                ${order.start_period && !order.end_period ? `<span class="badge bg-light text-dark"><i class="bi bi-calendar-check me-1"></i>Start: ${formatDate(order.start_period)}</span>` : ''}
            </div>
            
            ${hasLineItems ? `
            <div id="${itemId}-lines" class="mt-3 pt-3 border-top" style="display: none;">
                <div class="small">
                    ${lineItems.map(line => `
                        <div class="d-flex justify-content-between align-items-start py-2 border-bottom">
                            <div class="flex-grow-1">
                                <div class="fw-bold">${escapeHtml(line.product_name || line.productid)}</div>
                                <div class="text-muted small">
                                    ${line.quantity || 0} stk × ${parseFloat(line.listprice || 0).toFixed(2)} DKK
                                </div>
                            </div>
                            <div class="text-end fw-bold">
                                ${parseFloat(line.netprice || 0).toFixed(2)} DKK
                            </div>
                        </div>
                    `).join('')}
                    <div class="d-flex justify-content-between mt-3 pt-2">
                        <span class="text-muted">Subtotal:</span>
                        <strong>${parseFloat(order.hdnSubTotal || 0).toFixed(2)} DKK</strong>
                    </div>
                    <div class="d-flex justify-content-between text-success fw-bold fs-5">
                        <span>Total inkl. moms:</span>
                        <strong>${total.toFixed(2)} DKK</strong>
                    </div>
                </div>
            </div>
            ` : ''}
        </div>
        `;
    }).join('');
}

function renderBmcOfficeSubscriptionsList(subscriptions) {
    if (!subscriptions || subscriptions.length === 0) {
        return '<div class="text-center text-muted py-4"><i class="bi bi-inbox fs-1 d-block mb-2"></i>Ingen BMC Office abonnementer</div>';
    }
    
    return subscriptions.map((sub, idx) => {
        const itemId = `bmcoffice-${idx}`;
        const total = parseFloat(sub.total_inkl_moms || 0);
        const subtotal = parseFloat(sub.subtotal || 0);
        const rabat = parseFloat(sub.rabat || 0);
        
        return `
        <div class="subscription-item border rounded p-3 mb-3 bg-white shadow-sm">
            <div class="d-flex justify-content-between align-items-start mb-2">
                <div class="flex-grow-1">
                    <div class="fw-bold d-flex align-items-center">
                        <i class="bi bi-box-seam text-info me-2" style="font-size: 0.8rem;"></i>
                        ${escapeHtml(sub.text || 'Unnamed')}
                    </div>
                    <div class="small text-muted mt-1">
                        ${sub.firma_name ? `${escapeHtml(sub.firma_name)}` : ''}
                    </div>
                </div>
                <div class="text-end ms-3">
                    <div class="badge bg-${sub.active ? 'success' : 'secondary'} mb-1">${sub.active ? 'Aktiv' : 'Inaktiv'}</div>
                    <div class="fw-bold text-info">${total.toFixed(2)} DKK</div>
                </div>
            </div>
            
            <div class="d-flex gap-2 flex-wrap small text-muted mt-2">
                ${sub.start_date ? `<span class="badge bg-light text-dark"><i class="bi bi-calendar-check me-1"></i>Start: ${formatDate(sub.start_date)}</span>` : ''}
                ${sub.antal ? `<span class="badge bg-light text-dark"><i class="bi bi-stack me-1"></i>Antal: ${sub.antal}</span>` : ''}
                ${sub.faktura_firma_name && sub.faktura_firma_name !== sub.firma_name ? `<span class="badge bg-light text-dark"><i class="bi bi-receipt me-1"></i>${escapeHtml(sub.faktura_firma_name)}</span>` : ''}
            </div>
            
            <div class="mt-3 pt-3 border-top">
                <div class="small">
                    <div class="d-flex justify-content-between py-1">
                        <span class="text-muted">Antal:</span>
                        <strong>${sub.antal}</strong>
                    </div>
                    <div class="d-flex justify-content-between py-1">
                        <span class="text-muted">Pris pr. stk:</span>
                        <strong>${parseFloat(sub.pris || 0).toFixed(2)} DKK</strong>
                    </div>
                    ${rabat > 0 ? `
                    <div class="d-flex justify-content-between py-1 text-danger">
                        <span>Rabat:</span>
                        <strong>-${rabat.toFixed(2)} DKK</strong>
                    </div>
                    ` : ''}
                    ${sub.beskrivelse ? `
                    <div class="py-1 text-muted small">
                        <em>${escapeHtml(sub.beskrivelse)}</em>
                    </div>
                    ` : ''}
                    <div class="d-flex justify-content-between mt-2 pt-2 border-top">
                        <span class="text-muted">Subtotal:</span>
                        <strong>${subtotal.toFixed(2)} DKK</strong>
                    </div>
                    <div class="d-flex justify-content-between text-info fw-bold fs-5">
                        <span>Total inkl. moms:</span>
                        <strong>${total.toFixed(2)} DKK</strong>
                    </div>
                </div>
            </div>
        </div>
        `;
    }).join('');
}

function renderSubscriptionsList(subscriptions, isLocked = false) {
    if (!subscriptions || subscriptions.length === 0) {
        return '<div class="text-center text-muted py-4"><i class="bi bi-inbox fs-1 d-block mb-2"></i>Ingen abonnementer</div>';
    }
    
    return subscriptions.map((sub, idx) => {
        const itemId = `subscription-${idx}`;
        const total = parseFloat(sub.hdnGrandTotal || 0);
        // Extract numeric record ID from vTiger ID (e.g., "72x29932" -> "29932")
        const recordId = sub.id.includes('x') ? sub.id.split('x')[1] : sub.id;
        const vtigerUrl = `https://bmcnetworks.od2.vtiger.com/view/detail?module=Subscription&id=${recordId}&viewtype=summary`;
        
        return `
        <div class="subscription-item border rounded p-3 mb-3 bg-white shadow-sm ${sub.cf_subscription_bmclst === '1' ? 'border-danger border-3' : ''}">
            <div class="d-flex justify-content-between align-items-start mb-2">
                <div class="flex-grow-1" style="cursor: pointer;" onclick="toggleSubscriptionDetails('${sub.id}', '${itemId}')">
                    <div class="fw-bold d-flex align-items-center">
                        <i class="bi bi-chevron-right me-2 text-primary" id="${itemId}-icon" style="font-size: 0.8rem;"></i>
                        ${escapeHtml(sub.subject || sub.subscription_no || 'Unnamed')}
                        ${sub.cf_subscription_bmclst === '1' ? '<i class="bi bi-lock-fill text-danger ms-2" title="BMC Låst - Skal faktureres fra BMC"></i>' : ''}
                    </div>
                    <div class="small text-muted mt-1">
                        ${sub.subscription_no ? `#${escapeHtml(sub.subscription_no)}` : ''}
                    </div>
                </div>
                <div class="text-end ms-3">
                    <div class="btn-group btn-group-sm mb-2" role="group">
                        <a href="${vtigerUrl}" target="_blank" class="btn btn-outline-success" title="Åbn i vTiger (for at ændre priser)">
                            <i class="bi bi-box-arrow-up-right"></i> vTiger
                        </a>
                        ${!isLocked ? `
                        <button class="btn btn-outline-danger" onclick="deleteSubscription('${sub.id}', event)" title="Slet">
                            <i class="bi bi-trash"></i>
                        </button>
                        ` : ''}
                    </div>
                    <div>
                        ${sub.cf_subscription_bmclst === '1' ? '<div class="badge bg-danger mb-1"><i class="bi bi-lock-fill me-1"></i>BMC LÅST</div>' : ''}
                        <div class="badge bg-${getStatusColor(sub.subscriptionstatus)} mb-1">${escapeHtml(sub.subscriptionstatus || 'Active')}</div>
                        <div class="fw-bold text-primary">${total.toFixed(2)} DKK</div>
                    </div>
                </div>
            </div>
            
            <div class="d-flex gap-2 flex-wrap small text-muted mt-2">
                ${sub.generateinvoiceevery ? `<span class="badge bg-light text-dark"><i class="bi bi-arrow-repeat me-1"></i>${escapeHtml(sub.generateinvoiceevery)}</span>` : ''}
                ${sub.next_subscription_date ? `<span class="badge bg-warning text-dark"><i class="bi bi-calendar-event me-1"></i>Next: ${formatDate(sub.next_subscription_date)}</span>` : ''}
                ${sub.startdate && sub.enddate ? `<span class="badge bg-light text-dark"><i class="bi bi-calendar-range me-1"></i>${formatDate(sub.startdate)} - ${formatDate(sub.enddate)}</span>` : ''}
                ${sub.startdate ? `<span class="badge bg-light text-dark"><i class="bi bi-calendar-check me-1"></i>Start: ${formatDate(sub.startdate)}</span>` : ''}
            </div>
            
            <div id="${itemId}-lines" class="mt-3 pt-3 border-top" style="display: none;">
                <div class="text-center py-3">
                    <div class="spinner-border spinner-border-sm text-primary" role="status">
                        <span class="visually-hidden">Indlæser...</span>
                    </div>
                    <div class="small text-muted mt-2">Henter produktlinjer...</div>
                </div>
            </div>
        </div>
        `;
    }).join('');
}

function renderInvoicesList(invoices) {
    if (!invoices || invoices.length === 0) {
        return '<p class="text-muted small">Ingen fakturaer</p>';
    }
    
    return invoices.map((inv, idx) => {
        const itemId = `regular-invoice-${idx}`;
        const lineItems = inv.lineItems || [];
        const hasLineItems = Array.isArray(lineItems) && lineItems.length > 0;
        
        return `
        <div class="border-bottom pb-3 mb-3">
            <div class="d-flex justify-content-between align-items-start mb-2" style="cursor: pointer;" onclick="toggleLineItems('${itemId}')">
                <div class="fw-bold">
                    <i class="bi bi-chevron-right me-1" id="${itemId}-icon"></i>
                    ${escapeHtml(inv.subject || inv.invoice_no || 'Unnamed')}
                </div>
                <span class="badge bg-${getStatusColor(inv.invoicestatus)}">${escapeHtml(inv.invoicestatus || 'Draft')}</span>
            </div>
            <div class="d-flex gap-3 small text-muted flex-wrap">
                ${inv.invoicedate ? `<span><i class="bi bi-calendar me-1"></i>${formatDate(inv.invoicedate)}</span>` : ''}
                ${inv.invoice_no ? `<span><i class="bi bi-hash me-1"></i>${escapeHtml(inv.invoice_no)}</span>` : ''}
                ${inv.hdnGrandTotal ? `<span><i class="bi bi-currency-dollar me-1"></i>${parseFloat(inv.hdnGrandTotal).toFixed(2)} DKK</span>` : ''}
            </div>
            ${hasLineItems ? `
            <div id="${itemId}-lines" class="mt-3 ps-3" style="display: none;">
                <div class="small">
                    <strong>Produktlinjer:</strong>
                    ${lineItems.map(line => `
                        <div class="border-start border-2 border-secondary ps-2 py-1 mt-2">
                            <div class="fw-bold">${escapeHtml(line.product_name || line.productid)}</div>
                            <div class="text-muted">
                                Antal: ${line.quantity || 0} × ${parseFloat(line.listprice || 0).toFixed(2)} DKK = 
                                <strong>${parseFloat(line.netprice || 0).toFixed(2)} DKK</strong>
                            </div>
                            ${line.comment ? `<div class="text-muted small">${escapeHtml(line.comment)}</div>` : ''}
                        </div>
                    `).join('')}
                    <div class="border-top mt-2 pt-2">
                        <div class="d-flex justify-content-between">
                            <span>Subtotal:</span>
                            <strong>${parseFloat(inv.hdnSubTotal || 0).toFixed(2)} DKK</strong>
                        </div>
                        <div class="d-flex justify-content-between text-info fw-bold">
                            <span>Total inkl. moms:</span>
                            <strong>${parseFloat(inv.hdnGrandTotal || 0).toFixed(2)} DKK</strong>
                        </div>
                    </div>
                </div>
            </div>
            ` : ''}
        </div>
        `;
    }).join('');
}

function getStatusColor(status) {
    if (!status) return 'secondary';
    const s = status.toLowerCase();
    if (s.includes('active') || s.includes('approved')) return 'success';
    if (s.includes('pending')) return 'warning';
    if (s.includes('cancelled') || s.includes('expired')) return 'danger';
    return 'info';
}

function formatDate(dateStr) {
    if (!dateStr) return '';
    try {
        const date = new Date(dateStr);
        return date.toLocaleDateString('da-DK', { day: '2-digit', month: '2-digit', year: 'numeric' });
    } catch {
        return dateStr;
    }
}

function formatCurrency(value, currency) {
    const num = parseFloat(value || 0);
    return new Intl.NumberFormat('da-DK', { style: 'currency', currency: currency || 'DKK' }).format(num);
}

async function loadActivity() {
    const container = document.getElementById('activityContainer');
    container.innerHTML = '<div class="text-center py-5"><div class="spinner-border text-primary"></div></div>';
    
    // TODO: Implement activity log API endpoint
    setTimeout(() => {
        container.innerHTML = '<div class="text-muted text-center py-5">Ingen aktivitet at vise</div>';
    }, 500);
}

async function loadCustomerDrift() {
    const body = document.getElementById('customerDriftEventsBody');
    if (!body) return;

    body.innerHTML = '<tr><td colspan="6" class="text-muted">Indlæser drift-data...</td></tr>';

    try {
        const [summaryRes, eventsRes] = await Promise.all([
            fetch(`/api/v1/drift/customers/${customerId}/summary`, { credentials: 'include' }),
            fetch(`/api/v1/drift/customers/${customerId}/events?limit=100`, { credentials: 'include' }),
        ]);

        if (!summaryRes.ok) throw new Error(`Summary HTTP ${summaryRes.status}`);
        if (!eventsRes.ok) throw new Error(`Events HTTP ${eventsRes.status}`);

        const summary = await summaryRes.json();
        const events = await eventsRes.json();

        document.getElementById('customerDriftActive').textContent = Number(summary.active || 0);
        document.getElementById('customerDriftCritical').textContent = Number(summary.critical || 0);
        document.getElementById('customerDriftAcknowledged').textContent = Number(summary.acknowledged || 0);
        document.getElementById('customerDriftResolved').textContent = Number(summary.resolved || 0);

        if (!Array.isArray(events) || events.length === 0) {
            body.innerHTML = '<tr><td colspan="6" class="text-muted">Ingen drift-hændelser fundet for kunden.</td></tr>';
            return;
        }

        body.innerHTML = events.map(event => {
            const status = String(event.status || 'new');
            const statusClass = status === 'active' ? 'danger' : (status === 'acknowledged' ? 'warning' : 'success');
            const severity = String(event.severity || 'info');
            const severityClass = severity === 'critical' ? 'danger' : (severity === 'warning' ? 'warning' : 'secondary');
            const startText = event.started ? new Date(event.started).toLocaleString('da-DK') : '-';
            const sourceLink = event.source_link
                ? `<a href="${event.source_link}" target="_blank" rel="noopener noreferrer" class="btn btn-sm btn-outline-secondary"><i class="bi bi-box-arrow-up-right"></i></a>`
                : '-';

            return `
                <tr>
                    <td><span class="badge bg-${statusClass}">${status}</span></td>
                    <td><span class="badge bg-${severityClass}">${severity}</span></td>
                    <td>${event.device || '-'}</td>
                    <td class="text-muted">${event.message || '-'}</td>
                    <td>${startText}</td>
                    <td>${sourceLink}</td>
                </tr>
            `;
        }).join('');
    } catch (error) {
        console.error('Failed to load customer drift:', error);
        body.innerHTML = '<tr><td colspan="6" class="text-danger">Kunne ikke indlæse drift-data.</td></tr>';
    }
}

async function loadCustomerKontakt() {
    const container = document.getElementById('customerKontaktContainer');
    if (!container) return;

    container.innerHTML = '<div class="text-center py-5"><div class="spinner-border text-primary"></div></div>';

    try {
        const response = await fetch(`/api/v1/customers/${customerId}/kontakt?limit=300`);
        if (!response.ok) throw new Error('Kunne ikke hente kontakt historik');

        const data = await response.json();
        customerKontaktItems = data.items || [];
        renderCustomerKontaktTable();
    } catch (error) {
        console.error('Failed to load customer kontakt history:', error);
        container.innerHTML = '<div class="alert alert-danger">Kunne ikke hente kontakt historik</div>';
    }
}

function setCustomerKontaktFilter(filter) {
    customerKontaktFilter = filter;
    document.getElementById('customerKontaktFilterAll')?.classList.toggle('active', filter === 'all');
    document.getElementById('customerKontaktFilterSms')?.classList.toggle('active', filter === 'sms');
    document.getElementById('customerKontaktFilterCall')?.classList.toggle('active', filter === 'call');
    renderCustomerKontaktTable();
}

function renderCustomerKontaktTable() {
    const container = document.getElementById('customerKontaktContainer');
    if (!container) return;

    const filtered = (customerKontaktItems || []).filter(item => {
        if (customerKontaktFilter === 'all') return true;
        return item.type === customerKontaktFilter;
    });

    if (!filtered.length) {
        const msg = customerKontaktItems.length
            ? 'Ingen hændelser matcher filteret'
            : 'Ingen opkald eller SMS fundet for virksomhedens kontakter';
        container.innerHTML = `<div class="text-muted text-center py-5">${msg}</div>`;
        return;
    }

    container.innerHTML = `
        <div class="table-responsive">
            <table class="table table-hover align-middle mb-0">
                <thead class="table-light">
                    <tr>
                        <th>Tid</th>
                        <th>Kontakt</th>
                        <th>Type</th>
                        <th>Retning/Status</th>
                        <th>Nummer</th>
                        <th>Indhold</th>
                        <th>Varighed</th>
                        <th>Bruger</th>
                    </tr>
                </thead>
                <tbody>
                    ${filtered.map(renderCustomerKontaktRow).join('')}
                </tbody>
            </table>
        </div>
    `;
}

function renderCustomerKontaktRow(item) {
    const ts = item.happened_at ? new Date(item.happened_at).toLocaleString('da-DK') : '-';
    const typeBadge = item.type === 'sms'
        ? '<span class="badge bg-primary-subtle text-primary-emphasis">SMS</span>'
        : '<span class="badge bg-success-subtle text-success-emphasis">Opkald</span>';

    const dirOrStatus = item.type === 'sms'
        ? (item.sms_status || '-')
        : (item.direction === 'outbound' ? 'Udgående' : 'Indgående');

    const message = item.type === 'sms' ? escapeHtml(item.message || '-') : '-';
    const duration = item.duration_sec && Number(item.duration_sec) > 0
        ? `${Math.floor(Number(item.duration_sec) / 60)}:${String(Number(item.duration_sec) % 60).padStart(2, '0')}`
        : '-';

    const contactName = item.contact_id
        ? `<a href="/contacts/${item.contact_id}">${escapeHtml(item.contact_name || 'Ukendt')}</a>`
        : escapeHtml(item.contact_name || '-');

    return `
        <tr>
            <td>${ts}</td>
            <td>${contactName}</td>
            <td>${typeBadge}</td>
            <td>${escapeHtml(dirOrStatus || '-')}</td>
            <td>${escapeHtml(item.number || '-')}</td>
            <td class="text-break" style="max-width: 380px;">${message}</td>
            <td>${duration}</td>
            <td>${escapeHtml(item.user_name || '-')}</td>
        </tr>
    `;
}

async function loadConversations() {
    const container = document.getElementById('conversationsContainer');
    container.innerHTML = '<div class="text-center py-5"><div class="spinner-border text-primary"></div></div>';
    
    try {
        const response = await fetch(`/api/v1/conversations?customer_id=${customerId}`);
        if (!response.ok) throw new Error('Failed to load conversations');
        
        const conversations = await response.json();
        
        if (conversations.length === 0) {
            container.innerHTML = '<div class="text-muted text-center py-5">Ingen samtaler fundet</div>';
            return;
        }
        
        container.innerHTML = conversations.map(c => renderConversationCard(c)).join('');
        
    } catch (error) {
        console.error('Error loading conversations:', error);
        container.innerHTML = '<div class="alert alert-danger">Kunne ikke hente samtaler</div>';
    }
}

function renderConversationCard(c) {
    const date = new Date(c.created_at).toLocaleString();
    const duration = c.duration_seconds ? `${Math.floor(c.duration_seconds/60)}:${(c.duration_seconds%60).toString().padStart(2,'0')}` : '';
    
    return `
    <div class="card mb-3 shadow-sm conversation-item ${c.is_private ? 'border-warning' : ''}" data-text="${(c.transcript || '') + ' ' + (c.title || '')}">
        <div class="card-body">
            <div class="d-flex justify-content-between align-items-start mb-2">
                <div>
                    <h6 class="card-title fw-bold mb-1">
                        ${c.is_private ? '<i class="bi bi-lock-fill text-warning" title="Privat"></i> ' : ''}
                        ${c.title}
                    </h6>
                    <div class="small text-muted">
                        <i class="bi bi-calendar me-1"></i> ${date}
                        ${duration ? `• <i class="bi bi-clock me-1"></i> ${duration}` : ''}
                        • <span class="badge bg-light text-dark border">${c.source}</span>
                        • <span class="badge bg-secondary">${c.category || 'General'}</span>
                    </div>
                </div>
                <div class="dropdown">
                    <button class="btn btn-link text-muted p-0" data-bs-toggle="dropdown">
                        <i class="bi bi-three-dots-vertical"></i>
                    </button>
                    <ul class="dropdown-menu dropdown-menu-end">
                        <li><a class="dropdown-item" href="#" onclick="togglePrivacy(${c.id}, ${!c.is_private})">
                            ${c.is_private ? 'Gør Offentlig' : 'Gør Privat'}
                        </a></li>
                        <li><hr class="dropdown-divider"></li>
                        <li><a class="dropdown-item text-danger" href="#" onclick="deleteConversation(${c.id})">Slet</a></li>
                    </ul>
                </div>
            </div>
            
            <audio controls class="w-100 mb-3 bg-light rounded">
                <source src="/api/v1/conversations/${c.id}/audio" type="audio/mpeg">
                Your browser does not support the audio element.
            </audio>
            
            ${c.transcript ? `
            <div class="accordion" id="accordion-${c.id}">
                <div class="accordion-item border-0">
                    <h2 class="accordion-header">
                        <button class="accordion-button collapsed py-2 bg-light rounded" type="button" data-bs-toggle="collapse" data-bs-target="#collapse-${c.id}">
                            <i class="bi bi-file-text me-2"></i> Vis Transskribering
                        </button>
                    </h2>
                    <div id="collapse-${c.id}" class="accordion-collapse collapse" data-bs-parent="#accordion-${c.id}">
                        <div class="accordion-body bg-light rounded mt-2 small font-monospace" style="white-space: pre-wrap;">${c.transcript}</div>
                    </div>
                </div>
            </div>
            ` : ''}
        </div>
    </div>
    `;
}

function filterConversations() {
    const query = document.getElementById('conversationSearch').value.toLowerCase();
    const items = document.querySelectorAll('.conversation-item');
    
    items.forEach(item => {
        const text = item.getAttribute('data-text').toLowerCase();
        item.style.display = text.includes(query) ? 'block' : 'none';
    });
}

async function togglePrivacy(id, makePrivate) {
    try {
        await fetch(`/api/v1/conversations/${id}`, {
            method: 'PATCH',
            headers: {'Content-Type': 'application/json'},
            body: JSON.stringify({is_private: makePrivate})
        });
        loadConversations(); // Reload
    } catch(e) { alert('Fejl'); }
}

async function deleteConversation(id) {
    if(!confirm('Vil du slette denne samtale?')) return;
    
    // User requested "SLET alt" capability.
    // If user confirms again, we do hard delete.
    const hard = confirm('ADVARSEL: Skal dette være en permanent sletning af fil og data? (Kan ikke fortrydes)\n\nTryk OK for Permanent Sletning.\nTryk Cancel for Papirkurv.');
    
    try {
        await fetch(`/api/v1/conversations/${id}?hard_delete=${hard}`, { method: 'DELETE' });
        loadConversations();
    } catch(e) { alert('Fejl under sletning'); }
}

async function toggleSubscriptionDetails(subscriptionId, itemId) {
    const linesDiv = document.getElementById(`${itemId}-lines`);
    const icon = document.getElementById(`${itemId}-icon`);
    
    if (!linesDiv) return;
    
    const item = linesDiv.closest('.subscription-item');
    
    if (linesDiv.style.display === 'none') {
        linesDiv.style.display = 'block';
        if (icon) icon.className = 'bi bi-chevron-down me-2 text-primary';
        if (item) item.classList.add('expanded');
        
        // Fetch line items if not already loaded
        if (linesDiv.querySelector('.spinner-border')) {
            try {
                const response = await fetch(`/api/v1/subscriptions/${subscriptionId}`);
                const data = await response.json();
                
                if (data.status === 'success') {
                    const sub = data.subscription;
                    const lineItems = sub.LineItems || [];
                    const total = parseFloat(sub.hdnGrandTotal || 0);
                    
                    if (lineItems.length > 0) {
                        linesDiv.innerHTML = `
                            <div class="small">
                                <div class="d-flex justify-content-between align-items-center mb-2">
                                    <strong>Produktlinjer:</strong>
                                    <span class="text-muted small">
                                        <i class="bi bi-info-circle me-1"></i>
                                        For at ændre priser, klik "Åbn i vTiger"
                                    </span>
                                </div>
                                ${lineItems.map(line => `
                                    <div class="d-flex justify-content-between align-items-start py-2 border-bottom">
                                        <div class="flex-grow-1">
                                            <div class="fw-bold">${escapeHtml(line.product_name || line.productid)}</div>
                                            <div class="text-muted small">
                                                ${line.quantity} stk × ${parseFloat(line.listprice).toFixed(2)} DKK
                                            </div>
                                            ${line.comment ? `<div class="text-muted small"><i class="bi bi-chat-left-text me-1"></i>${escapeHtml(line.comment)}</div>` : ''}
                                        </div>
                                        <div class="text-end fw-bold">
                                            ${parseFloat(line.netprice || 0).toFixed(2)} DKK
                                        </div>
                                    </div>
                                `).join('')}
                                <div class="d-flex justify-content-between mt-3 pt-2">
                                    <span class="text-muted">Subtotal:</span>
                                    <strong>${parseFloat(sub.hdnSubTotal || 0).toFixed(2)} DKK</strong>
                                </div>
                                <div class="d-flex justify-content-between text-primary fw-bold fs-5">
                                    <span>Total inkl. moms:</span>
                                    <strong>${total.toFixed(2)} DKK</strong>
                                </div>
                            </div>
                        `;
                    } else {
                        linesDiv.innerHTML = '<div class="text-muted small">Ingen produktlinjer</div>';
                    }
                } else {
                    linesDiv.innerHTML = '<div class="text-danger small">Kunne ikke hente produktlinjer</div>';
                }
            } catch (error) {
                console.error('Error fetching subscription details:', error);
                linesDiv.innerHTML = '<div class="text-danger small">Fejl ved indlæsning</div>';
            }
        }
    } else {
        linesDiv.style.display = 'none';
        if (icon) icon.className = 'bi bi-chevron-right me-2 text-primary';
        if (item) item.classList.remove('expanded');
    }
}

function toggleLineItems(itemId) {
    const linesDiv = document.getElementById(`${itemId}-lines`);
    const icon = document.getElementById(`${itemId}-icon`);
    
    if (!linesDiv) return;
    
    const item = linesDiv.closest('.subscription-item');
    
    if (linesDiv.style.display === 'none') {
        linesDiv.style.display = 'block';
        if (icon) icon.className = 'bi bi-chevron-down me-2 text-success';
        if (item) item.classList.add('expanded');
    } else {
        linesDiv.style.display = 'none';
        if (icon) icon.className = 'bi bi-chevron-right me-2 text-success';
        if (item) item.classList.remove('expanded');
    }
}

function editCustomer() {
    if (!customerData) {
        alert('Kunde data ikke indlæst endnu');
        return;
    }
    
    // Pre-fill form with current data
    document.getElementById('editName').value = customerData.name || '';
    document.getElementById('editCvrNumber').value = customerData.cvr_number || '';
    document.getElementById('editEmail').value = customerData.email || '';
    document.getElementById('editInvoiceEmail').value = customerData.invoice_email || '';
    document.getElementById('editPhone').value = customerData.phone || '';
    document.getElementById('editMobilePhone').value = customerData.mobile_phone || '';
    document.getElementById('editWebsite').value = customerData.website || '';
    document.getElementById('editWikiSlug').value = customerData.wiki_slug || '';
    document.getElementById('editCountry').value = customerData.country || 'DK';
    document.getElementById('editAddress').value = customerData.address || '';
    document.getElementById('editPostalCode').value = customerData.postal_code || '';
    document.getElementById('editCity').value = customerData.city || '';
    document.getElementById('editStandardMarginPercent').value = (customerData.standard_margin_percent ?? customerDefaultMarginPercent);
    document.getElementById('editStandardHourlyRate').value = (customerData.standard_hourly_rate ?? customerDefaultHourlyRate);
    document.getElementById('editSpecialFreightPrice').value = customerData.special_freight_price ?? '';
    document.getElementById('editInvoiceFeeAmount').value = (customerData.invoice_fee_amount ?? customerDefaultInvoiceFee);
    document.getElementById('editSupplierServiceEnrolled').checked = !!customerData.supplier_service_enrolled;
    document.getElementById('editIsActive').checked = customerData.is_active !== false;
    
    // Show modal
    const modal = new bootstrap.Modal(document.getElementById('editCustomerModal'));
    modal.show();
}

async function saveCustomerEdit() {
    const marginValue = document.getElementById('editStandardMarginPercent').value;
    const hourlyRateValue = document.getElementById('editStandardHourlyRate').value;
    const freightValue = document.getElementById('editSpecialFreightPrice').value;
    const invoiceFeeValue = document.getElementById('editInvoiceFeeAmount').value;

    const updateData = {
        name: document.getElementById('editName').value,
        cvr_number: document.getElementById('editCvrNumber').value || null,
        email: document.getElementById('editEmail').value || null,
        invoice_email: document.getElementById('editInvoiceEmail').value || null,
        phone: document.getElementById('editPhone').value || null,
        mobile_phone: document.getElementById('editMobilePhone').value || null,
        website: document.getElementById('editWebsite').value || null,
        wiki_slug: document.getElementById('editWikiSlug').value || null,
        country: document.getElementById('editCountry').value || 'DK',
        address: document.getElementById('editAddress').value || null,
        postal_code: document.getElementById('editPostalCode').value || null,
        city: document.getElementById('editCity').value || null,
        standard_margin_percent: marginValue === '' ? customerDefaultMarginPercent : Number(marginValue),
        standard_hourly_rate: hourlyRateValue === '' ? customerDefaultHourlyRate : Number(hourlyRateValue),
        special_freight_price: freightValue === '' ? null : Number(freightValue),
        supplier_service_enrolled: document.getElementById('editSupplierServiceEnrolled').checked,
        invoice_fee_amount: invoiceFeeValue === '' ? customerDefaultInvoiceFee : Number(invoiceFeeValue),
        is_active: document.getElementById('editIsActive').checked
    };
    
    // Validate required fields
    if (!updateData.name || updateData.name.trim() === '') {
        alert('Virksomhedsnavn er påkrævet');
        return;
    }
    
    try {
        const response = await fetch(`/api/v1/customers/${customerId}`, {
            method: 'PUT',
            headers: {'Content-Type': 'application/json'},
            body: JSON.stringify(updateData)
        });
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Kunne ikke opdatere kunde');
        }
        
        const updatedCustomer = await response.json();
        
        // Close modal
        bootstrap.Modal.getInstance(document.getElementById('editCustomerModal')).hide();
        
        // Reload customer data
        await loadCustomer();
        
        // Show success message
        alert('✓ Kunde opdateret succesfuldt!');
        
    } catch (error) {
        console.error('Error updating customer:', error);
        alert('Fejl ved opdatering: ' + error.message);
    }
}

// Data Consistency Functions
let consistencyData = null;

function escapeAttribute(value) {
    return String(value ?? '')
        .replace(/&/g, '&amp;')
        .replace(/"/g, '&quot;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;');
}

function renderConsistencyValue(value) {
    if (value === null || value === undefined || String(value).trim() === '') {
        return '<em class="text-muted">Tom</em>';
    }
    return escapeHtml(String(value));
}

function getContactFieldLabel(field) {
    const labels = {
        first_name: 'Fornavn',
        last_name: 'Efternavn',
        email: 'Email',
        phone: 'Telefon',
        mobile: 'Mobil',
        title: 'Titel',
        department: 'Afdeling'
    };
    return labels[field] || field;
}

function buildContactComparisonLines(contact) {
    return [
        ['Navn', contact?.display_name],
        ['Email', contact?.email],
        ['Telefon', contact?.phone],
        ['Mobil', contact?.mobile],
        ['Titel', contact?.title],
        ['Afdeling', contact?.department]
    ].map(([label, value]) => `
        <div class="consistency-contact-line">
            <span class="consistency-contact-line-label">${escapeHtml(label)}:</span>
            <span>${renderConsistencyValue(value)}</span>
        </div>
    `).join('');
}

function buildChangedFieldsDetails(hub, vtiger, changedFields) {
    if (!Array.isArray(changedFields) || !changedFields.length) {
        return '';
    }

    return `
        <div class="consistency-diff-list">
            ${changedFields.map((field) => `
                <div class="consistency-diff-row">
                    <div class="consistency-diff-field">${escapeHtml(getContactFieldLabel(field))}</div>
                    <div class="consistency-diff-old"><strong>Hub nu:</strong> ${renderConsistencyValue(hub?.[field])}</div>
                    <div class="consistency-diff-new"><strong>Ny fra vTiger:</strong> ${renderConsistencyValue(vtiger?.[field])}</div>
                </div>
            `).join('')}
        </div>
    `;
}

function buildFieldDifferenceSummary(fieldData) {
    const comparisons = [];
    const hubValue = String(fieldData?.hub ?? '').trim();
    const vtigerValue = String(fieldData?.vtiger ?? '').trim();
    const economicValue = String(fieldData?.economic ?? '').trim();

    if (fieldData && fieldData.vtiger !== undefined && hubValue !== vtigerValue) {
        comparisons.push('Hub/vTiger');
    }
    if (fieldData && fieldData.economic !== undefined && hubValue !== economicValue) {
        comparisons.push('Hub/e-conomic');
    }
    if (
        fieldData &&
        fieldData.vtiger !== undefined &&
        fieldData.economic !== undefined &&
        vtigerValue !== economicValue
    ) {
        comparisons.push('vTiger/e-conomic');
    }

    if (!comparisons.length) {
        return '<span class="text-muted">Ingen</span>';
    }

    return comparisons.map(item => `<span class="badge text-bg-warning me-1">${escapeHtml(item)}</span>`).join('');
}

async function checkDataConsistency() {
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/data-consistency`);
        const data = await response.json();
        
        if (!data.enabled) {
            console.log('Data consistency checking is disabled');
            return;
        }
        
        consistencyData = data;
        
        // Show alert if there are discrepancies
        if (data.discrepancy_count > 0) {
            document.getElementById('discrepancyCount').textContent = data.discrepancy_count;
            document.getElementById('consistencyAlert').classList.remove('d-none');
        } else {
            document.getElementById('consistencyAlert').classList.add('d-none');
        }
        
    } catch (error) {
        console.error('Error checking data consistency:', error);
    }
}

function showConsistencyModal() {
    if (!consistencyData) {
        alert('Ingen data tilgængelig');
        return;
    }
    
    const tbody = document.getElementById('consistencyTableBody');
    const contactsContainer = document.getElementById('consistencyContactsContainer');
    const contactsSection = document.getElementById('consistencyContactsSection');
    const syncOkCheckbox = document.getElementById('consistencyAddSyncOkTag');
    tbody.innerHTML = '';
    if (contactsContainer) {
        contactsContainer.innerHTML = '';
    }
    if (syncOkCheckbox) {
        syncOkCheckbox.checked = false;
    }
    
    // Field labels in Danish
    const fieldLabels = {
        'name': 'Navn',
        'cvr_number': 'CVR Nummer',
        'address': 'Adresse',
        'city': 'By',
        'postal_code': 'Postnummer',
        'country': 'Land',
        'phone': 'Telefon',
        'mobile_phone': 'Mobil',
        'email': 'Email',
        'website': 'Hjemmeside',
        'invoice_email': 'Faktura Email'
    };
    
    // Only show fields with discrepancies
    for (const [fieldName, fieldData] of Object.entries(consistencyData.discrepancies)) {
        if (!fieldData.discrepancy) continue;
        
        const row = document.createElement('tr');
        row.className = 'table-warning';
        
        // Field name
        const fieldCell = document.createElement('td');
        fieldCell.innerHTML = `
            <strong>${fieldLabels[fieldName] || fieldName}</strong>
            <div class="small text-muted mt-1">Forskellig værdi fundet på dette felt</div>
        `;
        row.appendChild(fieldCell);
        
        // Hub value
        const hubCell = document.createElement('td');
        hubCell.innerHTML = `
            <div class="form-check">
                <input class="form-check-input" type="radio" name="field_${fieldName}" 
                       id="hub_${fieldName}" value="hub" data-value="${escapeAttribute(fieldData.hub || '')}">
                <label class="form-check-label" for="hub_${fieldName}">
                    ${fieldData.hub ? escapeHtml(fieldData.hub) : '<em class="text-muted">Tom</em>'}
                </label>
            </div>
        `;
        row.appendChild(hubCell);
        
        // vTiger value
        const vtigerCell = document.createElement('td');
        if (consistencyData.systems_available.vtiger) {
            vtigerCell.innerHTML = `
                <div class="form-check">
                    <input class="form-check-input" type="radio" name="field_${fieldName}" 
                           id="vtiger_${fieldName}" value="vtiger" data-value="${escapeAttribute(fieldData.vtiger || '')}">
                    <label class="form-check-label" for="vtiger_${fieldName}">
                        ${fieldData.vtiger ? escapeHtml(fieldData.vtiger) : '<em class="text-muted">Tom</em>'}
                    </label>
                </div>
            `;
        } else {
            vtigerCell.innerHTML = '<em class="text-muted">Ikke tilgængelig</em>';
        }
        row.appendChild(vtigerCell);
        
        // e-conomic value
        const economicCell = document.createElement('td');
        if (consistencyData.systems_available.economic) {
            economicCell.innerHTML = `
                <div class="form-check">
                    <input class="form-check-input" type="radio" name="field_${fieldName}" 
                           id="economic_${fieldName}" value="economic" data-value="${escapeAttribute(fieldData.economic || '')}">
                    <label class="form-check-label" for="economic_${fieldName}">
                        ${fieldData.economic ? escapeHtml(fieldData.economic) : '<em class="text-muted">Tom</em>'}
                    </label>
                </div>
            `;
        } else {
            economicCell.innerHTML = '<em class="text-muted">Ikke tilgængelig</em>';
        }
        row.appendChild(economicCell);
        
        // Action cell (which system to use)
        const actionCell = document.createElement('td');
        actionCell.innerHTML = `
            <div class="small mb-2"><strong>Forskelle:</strong> ${buildFieldDifferenceSummary(fieldData)}</div>
            <span class="text-muted">Vælg hvilken værdi der skal bruges som ny korrekt værdi</span>
        `;
        row.appendChild(actionCell);
        
        tbody.appendChild(row);
    }

    const contactDiscrepancies = Array.isArray(consistencyData.contact_discrepancies)
        ? consistencyData.contact_discrepancies
        : [];

    if (contactsSection) {
        contactsSection.classList.toggle('d-none', contactDiscrepancies.length === 0);
    }

    if (contactsContainer && contactDiscrepancies.length > 0) {
        contactsContainer.innerHTML = contactDiscrepancies.map((item, index) => {
            const vtiger = item.vtiger || {};
            const hub = item.hub || null;
            const selectable = item.selectable !== false;
            const checkedAttr = selectable ? '' : 'disabled';
            const statusClass = item.action === 'matched' ? 'bg-success-subtle text-success border-success-subtle' : 'bg-light text-dark border';
            const changedFields = buildChangedFieldsDetails(hub, vtiger, item.changed_fields || []);
            const hubSummary = hub
                ? `
                    <div class="consistency-contact-box">
                        <div class="consistency-contact-box-title">Nuværende i Hub</div>
                        ${buildContactComparisonLines(hub)}
                    </div>
                `
                : `
                    <div class="consistency-contact-box">
                        <div class="consistency-contact-box-title">Nuværende i Hub</div>
                        <div class="small text-muted">Ingen kontakt tilknyttet denne kunde endnu</div>
                    </div>
                `;
            const vtigerSummary = `
                <div class="consistency-contact-box consistency-contact-box--new">
                    <div class="consistency-contact-box-title">Ny værdi fra vTiger</div>
                    ${buildContactComparisonLines(vtiger)}
                </div>
            `;

            return `
                <label class="list-group-item list-group-item-action ${selectable ? '' : 'opacity-75'}">
                    <div class="form-check">
                        <input class="form-check-input me-2 consistency-contact-check" type="checkbox"
                               value="${escapeAttribute(item.match_key || '')}" id="consistency_contact_${index}" ${checkedAttr}>
                        <span class="fw-semibold">${escapeHtml(vtiger.display_name || 'Ukendt kontakt')}</span>
                        <span class="badge ${statusClass} ms-2">${escapeHtml(item.action || 'sync')}</span>
                    </div>
                    <div class="small mt-1">${escapeHtml(item.reason || '')}</div>
                    <div class="consistency-contact-comparison">
                        ${hubSummary}
                        ${vtigerSummary}
                    </div>
                    ${changedFields}
                </label>
            `;
        }).join('');
    }
    
    const modal = new bootstrap.Modal(document.getElementById('consistencyModal'));
    modal.show();
}

async function syncSelectedFields() {
    const selections = [];
    const selectedContactKeys = [];
    
    // Gather all selected values
    const radioButtons = document.querySelectorAll('#consistencyTableBody input[type="radio"]:checked');
    const contactCheckboxes = document.querySelectorAll('.consistency-contact-check:checked');
    const addSyncOkTag = Boolean(document.getElementById('consistencyAddSyncOkTag')?.checked);
    
    if (radioButtons.length === 0 && contactCheckboxes.length === 0) {
        alert('Vælg venligst mindst ét felt eller én kontakt at synkronisere');
        return;
    }
    
    radioButtons.forEach(radio => {
        const fieldName = radio.name.replace('field_', '');
        const sourceSystem = radio.value;
        const sourceValue = radio.dataset.value;
        
        selections.push({
            field_name: fieldName,
            source_system: sourceSystem,
            source_value: sourceValue
        });
    });

    contactCheckboxes.forEach((checkbox) => {
        if (checkbox.value) {
            selectedContactKeys.push(checkbox.value);
        }
    });
    
    // Confirm action
    if (!confirm(`Du er ved at synkronisere ${selections.length} felt(er) og ${selectedContactKeys.length} kontakt(er). Fortsæt?`)) {
        return;
    }
    
    let fieldSuccessCount = 0;
    let failCount = 0;
    let contactSummary = null;
    
    for (const selection of selections) {
        try {
            const response = await fetch(
                `/api/v1/customers/${customerId}/sync-field?` + 
                new URLSearchParams(selection),
                { method: 'POST' }
            );
            
            if (response.ok) {
                fieldSuccessCount++;
            } else {
                failCount++;
                console.error(`Failed to sync ${selection.field_name}`);
            }
        } catch (error) {
            failCount++;
            console.error(`Error syncing ${selection.field_name}:`, error);
        }
    }

    if (selectedContactKeys.length > 0) {
        try {
            const response = await fetch(`/api/v1/customers/${customerId}/sync-contacts`, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    selected_match_keys: selectedContactKeys,
                    add_sync_ok_tag: false
                })
            });

            if (response.ok) {
                const payload = await response.json();
                contactSummary = payload.stats || null;
            } else {
                failCount++;
                console.error('Failed to sync selected contacts');
            }
        } catch (error) {
            failCount++;
            console.error('Error syncing selected contacts:', error);
        }
    }

    if (addSyncOkTag && failCount === 0 && (fieldSuccessCount > 0 || (contactSummary && contactSummary.selected > 0))) {
        try {
            await addSyncOkTagToCustomer();
        } catch (error) {
            failCount++;
            console.error('Failed to add Sync OK tag:', error);
        }
    }
    
    // Close modal
    const modal = bootstrap.Modal.getInstance(document.getElementById('consistencyModal'));
    modal.hide();
    
    // Show result
    if (failCount === 0) {
        const parts = [];
        if (fieldSuccessCount > 0) {
            parts.push(`${fieldSuccessCount} felt`);
        }
        if (contactSummary && contactSummary.selected > 0) {
            parts.push(`${contactSummary.selected} kontakt(er)`);
        }
        if (addSyncOkTag) {
            parts.push('tag "Sync OK"');
        }
        alert(`✓ Synkroniseret: ${parts.join(', ')}`);
    } else {
        alert(`⚠️ ${fieldSuccessCount} felt synkroniseret, ${selectedContactKeys.length} kontakt(er) forsøgt, ${failCount} fejl`);
    }
    
    // Reload customer data and recheck consistency
    await loadCustomer();
    await checkDataConsistency();
}

async function addSyncOkTagToCustomer() {
    const response = await fetch(`/api/v1/customers/${customerId}/mark-sync-ok`, {
        method: 'POST'
    });

    if (!response.ok) {
        const error = await response.json().catch(() => ({}));
        throw new Error(error.detail || 'Kunne ikke tilføje Sync OK tag');
    }
}

function showAddContactModal() {
    if (!customerId) {
        alert('Kunde-ID mangler');
        return;
    }
    const returnTo = `/customers/${customerId}#contacts`;
    window.location.href = `/contacts?customer_id=${encodeURIComponent(customerId)}&create=1&return_to=${encodeURIComponent(returnTo)}`;
}

// Subscription management functions
let currentSubscriptions = [];

function showCreateSubscriptionModal() {
    if (!customerData || !customerData.vtiger_id) {
        alert('Kunden er ikke linket til vTiger');
        return;
    }
    
    const modal = new bootstrap.Modal(document.getElementById('subscriptionModal'));
    document.getElementById('subscriptionModalLabel').textContent = 'Opret Nyt Abonnement';
    document.getElementById('subscriptionForm').reset();
    document.getElementById('subscriptionId').value = '';
    modal.show();
}

async function editSubscription(subscriptionId, event) {
    event.stopPropagation();
    
    // Find subscription data
    const sub = currentSubscriptions.find(s => s.id === subscriptionId);
    if (!sub) {
        alert('Abonnement ikke fundet');
        return;
    }
    
    // Fill form
    document.getElementById('subscriptionId').value = subscriptionId;
    document.getElementById('subjectInput').value = sub.subject || '';
    document.getElementById('startdateInput').value = sub.startdate || '';
    document.getElementById('enddateInput').value = sub.enddate || '';
    document.getElementById('frequencyInput').value = sub.generateinvoiceevery || 'Monthly';
    document.getElementById('statusInput').value = sub.subscriptionstatus || 'Active';
    
    // Show modal
    const modal = new bootstrap.Modal(document.getElementById('subscriptionModal'));
    document.getElementById('subscriptionModalLabel').textContent = 'Rediger Abonnement';
    modal.show();
}

async function deleteSubscription(subscriptionId, event) {
    event.stopPropagation();
    
    if (!confirm('Er du sikker på at du vil slette dette abonnement?')) {
        return;
    }
    
    try {
        const response = await fetch(`/api/v1/subscriptions/${subscriptionId}`, {
            method: 'DELETE'
        });
        
        if (!response.ok) {
            throw new Error('Failed to delete subscription');
        }
        
        alert('Abonnement slettet');
        loadSubscriptions(); // Reload
    } catch (error) {
        console.error('Error deleting subscription:', error);
        alert('Kunne ikke slette abonnement: ' + error.message);
    }
}

async function saveSubscription() {
    const subscriptionId = document.getElementById('subscriptionId').value;
    const isEdit = !!subscriptionId;
    
    const data = {
        subject: document.getElementById('subjectInput').value,
        startdate: document.getElementById('startdateInput').value,
        enddate: document.getElementById('enddateInput').value || null,
        generateinvoiceevery: document.getElementById('frequencyInput').value,
        subscriptionstatus: document.getElementById('statusInput').value,
        products: [] // TODO: Add product picker
    };
    
    if (!isEdit) {
        data.account_id = customerData.vtiger_id;
    }
    
    try {
        let response;
        if (isEdit) {
            response = await fetch(`/api/v1/subscriptions/${subscriptionId}`, {
                method: 'PUT',
                headers: {'Content-Type': 'application/json'},
                body: JSON.stringify(data)
            });
        } else {
            response = await fetch(`/api/v1/customers/${customerId}/subscriptions`, {
                method: 'POST',
                headers: {'Content-Type': 'application/json'},
                body: JSON.stringify(data)
            });
        }
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Failed to save subscription');
        }
        
        alert(isEdit ? 'Abonnement opdateret' : 'Abonnement oprettet');
        bootstrap.Modal.getInstance(document.getElementById('subscriptionModal')).hide();
        loadSubscriptions(); // Reload
    } catch (error) {
        console.error('Error saving subscription:', error);
        alert('Kunne ikke gemme abonnement: ' + error.message);
    }
}

async function loadCustomerSessions() {
    const container = document.getElementById('customerSessionsContainer');
    if (!container) return;

    container.innerHTML = `
        <div class="col-12 text-center py-5">
            <div class="spinner-border text-primary"></div>
        </div>
    `;

    try {
        const response = await fetch(`/api/v1/anydesk/sessions?customer_id=${customerId}`);
        if (!response.ok) {
            throw new Error('Kunne ikke hente sessioner');
        }

        const data = await response.json();
        displayCustomerSessions(data.sessions || []);
    } catch (error) {
        console.error('Failed to load sessions:', error);
        container.innerHTML = '<div class="col-12 text-center py-5 text-muted">Kunne ikke hente sessioner</div>';
    }
}

function displayCustomerSessions(sessions) {
    const container = document.getElementById('customerSessionsContainer');
    if (!container) return;

    if (!sessions || sessions.length === 0) {
        container.innerHTML = '<div class="col-12 text-center py-5 text-muted">Ingen remote sessions endnu</div>';
        return;
    }

    container.innerHTML = sessions.map(session => {
        const badgeClass = getSessionBadgeClass(session.status);
        const duration = session.duration_minutes ? `${session.duration_minutes} min` : '—';
        const startedAt = session.started_at ? new Date(session.started_at).toLocaleString('da-DK') : '-';
        const endedAt = session.ended_at ? new Date(session.ended_at).toLocaleString('da-DK') : '-';
        const linkButton = session.session_link
            ? `<a class="btn btn-sm btn-outline-primary" href="${session.session_link}" target="_blank">Åbn Link</a>`
            : '';
        const worklogButton = session.status === 'completed'
            ? `<button class="btn btn-sm btn-outline-secondary" onclick="showCustomerWorklogSuggestion(${session.id})">Vis forslag</button>`
            : '';

        return `
            <div class="col-12">
                <div class="session-card">
                    <div class="d-flex flex-wrap justify-content-between align-items-start gap-3">
                        <div>
                            <div class="d-flex align-items-center gap-2 mb-2">
                                <span class="badge ${badgeClass}">${escapeHtml(session.status || 'ukendt')}</span>
                                <strong>Session #${session.id}</strong>
                            </div>
                            <div class="session-meta">Start: ${startedAt} | Slut: ${endedAt} | Varighed: ${duration}</div>
                            ${session.contact_name ? `<div class="session-meta">Kontakt: ${escapeHtml(session.contact_name)}</div>` : ''}
                            ${session.sag_id ? `<div class="session-meta">Sag ID: ${session.sag_id}</div>` : ''}
                        </div>
                        <div class="d-flex gap-2">
                            ${linkButton}
                            ${worklogButton}
                        </div>
                    </div>
                </div>
            </div>
        `;
    }).join('');
}

async function startCustomerSession() {
    const alertBox = document.getElementById('customerSessionAlert');
    const description = document.getElementById('customerSessionDescription')?.value?.trim() || null;

    try {
        const response = await fetch('/api/v1/anydesk/start-session', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
                customer_id: customerId,
                description: description || `Remote support for ${customerData?.name || 'customer'}`
            })
        });

        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Kunne ikke starte session');
        }

        const data = await response.json();
        if (alertBox) {
            alertBox.classList.remove('d-none');
            alertBox.innerHTML = `Session startet. ${data.session_link ? `Link: <a href="${data.session_link}" target="_blank">${data.session_link}</a>` : ''}`;
        }

        if (data.session_link) {
            window.open(data.session_link, '_blank');
        }

        await loadCustomerSessions();
    } catch (error) {
        console.error('Failed to start session:', error);
        alert('Fejl: ' + error.message);
    }
}

async function showCustomerWorklogSuggestion(sessionId) {
    try {
        const response = await fetch(`/api/v1/anydesk/sessions/${sessionId}/worklog-suggestion`);
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Kunne ikke hente forslag');
        }

        const suggestion = await response.json();
        const body = document.getElementById('customerWorklogSuggestionBody');
        if (body) {
            body.innerHTML = `
                <div class="mb-2"><strong>Varighed:</strong> ${suggestion.duration_hours} timer</div>
                <div class="mb-2"><strong>Start:</strong> ${new Date(suggestion.start_time).toLocaleString('da-DK')}</div>
                <div class="mb-2"><strong>Slut:</strong> ${new Date(suggestion.end_time).toLocaleString('da-DK')}</div>
                <div class="mb-2"><strong>Beskrivelse:</strong> ${escapeHtml(suggestion.description || '')}</div>
                <div class="small text-muted">Forslaget kan bruges til manuel tidsregistrering</div>
            `;
        }

        const modal = new bootstrap.Modal(document.getElementById('customerWorklogSuggestionModal'));
        modal.show();
    } catch (error) {
        console.error('Failed to load suggestion:', error);
        alert('Fejl: ' + error.message);
    }
}

function getSessionBadgeClass(status) {
    switch ((status || '').toLowerCase()) {
        case 'active':
            return 'bg-success';
        case 'completed':
            return 'bg-primary';
        case 'failed':
            return 'bg-danger';
        case 'cancelled':
            return 'bg-secondary';
        default:
            return 'bg-light text-dark';
    }
}

function getInitials(name) {
    if (!name) return '?';
    const words = name.trim().split(' ');
    if (words.length === 1) return words[0].substring(0, 2).toUpperCase();
    return (words[0][0] + words[words.length - 1][0]).toUpperCase();
}

function escapeHtml(text) {
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

async function toggleSubscriptionsLock() {
    const currentlyLocked = customerData?.subscriptions_locked || false;
    const action = currentlyLocked ? 'låse op' : 'låse';
    
    if (!confirm(`Er du sikker på at du vil ${action} abonnementer for denne kunde?\n\n${currentlyLocked ? 'Efter oplåsning kan abonnementer redigeres i BMC Hub.' : 'Efter låsning kan abonnementer kun redigeres direkte i vTiger.'}`)) {
        return;
    }
    
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/subscriptions/lock`, {
            method: 'POST',
            headers: {'Content-Type': 'application/json'},
            body: JSON.stringify({ locked: !currentlyLocked })
        });
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Kunne ikke opdatere låsestatus');
        }
        
        const result = await response.json();
        
        // Reload customer and subscriptions
        await loadCustomer();
        await loadSubscriptions();
        
        alert(`✓ ${result.message}\n\n${result.note || ''}`);
        
    } catch (error) {
        console.error('Error toggling lock:', error);
        alert('Fejl: ' + error.message);
    }
}

async function saveInternalComment() {
    const commentInput = document.getElementById('internalCommentInput');
    const commentText = commentInput.value.trim();
    
    if (!commentText) {
        alert('Indtast venligst en kommentar');
        return;
    }
    
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/subscription-comment`, {
            method: 'POST',
            headers: {'Content-Type': 'application/json'},
            body: JSON.stringify({ comment: commentText })
        });
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Kunne ikke gemme kommentar');
        }
        
        const result = await response.json();
        
        // Clear input
        commentInput.value = '';
        
        // Show saved comment
        displayInternalComment(result);
        
        alert('✓ Kommentar gemt');
        
    } catch (error) {
        console.error('Error saving comment:', error);
        alert('Fejl: ' + error.message);
    }
}

async function loadInternalComment() {
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/subscription-comment`);
        
        if (response.status === 404) {
            // No comment yet, that's fine
            return;
        }
        
        if (!response.ok) {
            throw new Error('Kunne ikke hente kommentar');
        }
        
        const result = await response.json();
        displayInternalComment(result);
        
    } catch (error) {
        console.error('Error loading comment:', error);
    }
}

function displayInternalComment(data) {
    const displayDiv = document.getElementById('internalCommentDisplay');
    const editDiv = document.getElementById('internalCommentEdit');
    const commentMeta = document.getElementById('commentMeta');
    const commentText = document.getElementById('commentText');
    
    if (data && data.comment) {
        commentText.textContent = data.comment;
        
        // Format timestamp
        const timestamp = new Date(data.created_at).toLocaleString('da-DK', {
            year: 'numeric',
            month: '2-digit',
            day: '2-digit',
            hour: '2-digit',
            minute: '2-digit'
        });
        
        commentMeta.textContent = `Oprettet af ${data.created_by || 'System'} • ${timestamp}`;
        displayDiv.style.display = 'block';
        editDiv.style.display = 'none';
    } else {
        displayDiv.style.display = 'none';
        editDiv.style.display = 'block';
    }
}

async function loadAcmpOverview() {
    const loading = document.getElementById('acmpLoading');
    const container = document.getElementById('acmpContainer');
    const empty = document.getElementById('acmpEmpty');

    loading.style.display = 'block';
    container.style.display = 'none';
    empty.style.display = 'none';

    try {
        const response = await fetch(`/api/v1/customers/${customerId}/acmp?months=6`);
        const payload = await response.json();

        if (!response.ok) {
            throw new Error(payload.detail || 'Kunne ikke hente ACMP-data');
        }

        if (!payload.available || (!payload.products || payload.products.length === 0)) {
            empty.style.display = 'block';
            loading.style.display = 'none';
            return;
        }

        renderAcmpOverview(payload);
        container.style.display = 'block';
        loading.style.display = 'none';
    } catch (error) {
        console.error('Failed to load ACMP overview:', error);
        loading.innerHTML = `<div class="alert alert-danger"><i class="bi bi-exclamation-circle me-2"></i>${error.message}</div>`;
    }
}

function renderAcmpOverview(payload) {
    const summary = payload.summary || {};

    document.getElementById('acmpRevenueMonth').textContent = formatDKK(Number(summary.revenue_month || 0));
    document.getElementById('acmpMarginMonth').textContent = formatDKK(Number(summary.margin_month || 0));
    document.getElementById('acmpDistinctProducts').textContent = Number(summary.distinct_products || 0).toLocaleString('da-DK');
    document.getElementById('acmpPendingApprovals').textContent = Number(summary.pending_approvals || 0).toLocaleString('da-DK');

    const statusContainer = document.getElementById('acmpStatusBreakdown');
    const statusRows = payload.status_breakdown || [];
    statusContainer.innerHTML = statusRows.length > 0
        ? statusRows.map(row => `<span class="badge text-bg-light border">${escapeHtml(row.queue_status)}: ${Number(row.count || 0).toLocaleString('da-DK')}</span>`).join('')
        : '<span class="text-muted">Ingen statusdata</span>';

    const monthlyRows = document.getElementById('acmpMonthlyRows');
    const monthly = payload.monthly || [];
    monthlyRows.innerHTML = monthly.length > 0
        ? monthly.map(row => `
            <tr>
                <td>${escapeHtml(row.month || '-')}</td>
                <td class="text-end">${formatDKK(Number(row.revenue_total || 0))}</td>
                <td class="text-end">${formatDKK(Number(row.margin_total || 0))}</td>
            </tr>
        `).join('')
        : '<tr><td colspan="3" class="text-center text-muted">Ingen månedlige data</td></tr>';

    const productsRows = document.getElementById('acmpProductsRows');
    const products = payload.products || [];
    productsRows.innerHTML = products.length > 0
        ? products.map(row => `
            <tr>
                <td>${escapeHtml(row.product_name || '-')}</td>
                <td>${escapeHtml(row.material_number || '-')}</td>
                <td>${escapeHtml(row.vendor || '-')}</td>
                <td class="text-end">${Number(row.current_month_qty || 0).toLocaleString('da-DK')}</td>
                <td class="text-end">${Number(row.previous_month_qty || 0).toLocaleString('da-DK')}</td>
                <td class="text-end">${formatSignedNumber(Number(row.current_month_qty || 0) - Number(row.previous_month_qty || 0))}</td>
                <td class="text-end">${Number(row.quantity_total || 0).toLocaleString('da-DK')}</td>
                <td class="text-end">${formatDKK(Number(row.revenue_total || 0))}</td>
                <td class="text-end">${formatDKK(Number(row.margin_total || 0))}</td>
            </tr>
        `).join('')
        : '<tr><td colspan="9" class="text-center text-muted">Ingen produkter fundet</td></tr>';

    const changesRows = document.getElementById('acmpChangesRows');
    const changes = payload.changes || [];
    changesRows.innerHTML = changes.length > 0
        ? changes.map(row => `
            <tr>
                <td>
                    <div>${escapeHtml(row.product_name || '-')}</div>
                    <div class="small text-muted">${escapeHtml(row.material_number || '-')}</div>
                </td>
                <td class="text-end">${Number(row.previous_month_qty || 0).toLocaleString('da-DK')}</td>
                <td class="text-end">${Number(row.current_month_qty || 0).toLocaleString('da-DK')}</td>
                <td class="text-end">${formatSignedNumber(Number(row.quantity_delta || 0))}</td>
            </tr>
        `).join('')
        : '<tr><td colspan="4" class="text-center text-muted">Ingen ændringer fundet</td></tr>';

    const recentRows = document.getElementById('acmpRecentRows');
    const recent = payload.recent_lines || [];
    recentRows.innerHTML = recent.length > 0
        ? recent.map(row => `
            <tr>
                <td>${formatShortDate(row.billing_start || row.created_at)}</td>
                <td>
                    <div>${escapeHtml(row.product_name || '-')}</div>
                    <div class="small text-muted">${escapeHtml(row.material_number || '-')}</div>
                </td>
                <td class="text-end">${Number(row.quantity || 0).toLocaleString('da-DK')}</td>
                <td class="text-end">${formatDKK(Number(row.revenue || 0))}</td>
                <td>${escapeHtml(row.queue_status || '-')}</td>
            </tr>
        `).join('')
        : '<tr><td colspan="5" class="text-center text-muted">Ingen linjer fundet</td></tr>';
}

function formatSignedNumber(value) {
    const number = Number(value || 0);
    const prefix = number > 0 ? '+' : '';
    return `${prefix}${number.toLocaleString('da-DK')}`;
}

function formatShortDate(value) {
    if (!value) return '-';
    const date = new Date(value);
    if (Number.isNaN(date.getTime())) return escapeHtml(String(value));
    return date.toLocaleDateString('da-DK');
}

async function loadCustomerInternetConnections() {
    const loading = document.getElementById('customerInternetLoading');
    const empty = document.getElementById('customerInternetEmpty');
    const list = document.getElementById('customerInternetList');

    if (!loading || !empty || !list) return;

    loading.classList.remove('d-none');
    empty.classList.add('d-none');
    list.classList.add('d-none');

    try {
        const response = await fetch(`/api/v1/internet-connections?customer_id=${customerId}`);
        const payload = await response.json();
        if (!response.ok) {
            throw new Error(payload.detail || 'Kunne ikke hente internetforbindelser');
        }

        const connections = Array.isArray(payload) ? payload : [];
        window.__customerInternetConnections = connections;
        renderCustomerInternetConnections(connections);
    } catch (error) {
        loading.innerHTML = `<div class="alert alert-danger mb-0"><i class="bi bi-exclamation-circle me-2"></i>${escapeHtml(error.message || 'Ukendt fejl')}</div>`;
    }
}

function renderCustomerInternetConnections(connections) {
    const loading = document.getElementById('customerInternetLoading');
    const empty = document.getElementById('customerInternetEmpty');
    const list = document.getElementById('customerInternetList');

    const items = Array.isArray(connections) ? connections : [];
    const totalCost = items.reduce((sum, item) => sum + Number(item.monthly_cost || 0), 0);
    const totalSales = items.reduce((sum, item) => sum + Number(item.sales_price || 0), 0);
    const totalInUseIps = items.reduce((sum, item) => sum + Number(item.in_use_ip_addresses || 0), 0);

    document.getElementById('customerInternetCount').textContent = String(items.length);
    document.getElementById('customerInternetCost').textContent = formatDKK(totalCost);
    document.getElementById('customerInternetSales').textContent = formatDKK(totalSales);
    document.getElementById('customerInternetIps').textContent = String(totalInUseIps);

    loading.classList.add('d-none');

    if (!items.length) {
        empty.classList.remove('d-none');
        list.classList.add('d-none');
        list.innerHTML = '';
        return;
    }

    empty.classList.add('d-none');
    list.classList.remove('d-none');
    list.innerHTML = items.map((item) => {
        const status = String(item.status || 'active').toLowerCase();
        const statusClass = {
            active: 'internet-status-active',
            inactive: 'internet-status-inactive',
            planned: 'internet-status-planned',
            pending: 'internet-status-pending',
            terminated: 'internet-status-terminated',
            cancelled: 'internet-status-cancelled',
        }[status] || 'internet-status-inactive';

        const parentLabel = item.parent_name
            ? `<div class="small text-muted"><i class="bi bi-diagram-2 me-1"></i>Ligger under ${escapeHtml(item.parent_name)}</div>`
            : '';

        const monitoring = item.monitoring_url
            ? `<a href="${escapeHtml(item.monitoring_url)}" target="_blank" class="btn btn-sm btn-outline-secondary"><i class="bi bi-activity me-1"></i>Overvågning</a>`
            : '';

        return `
            <div class="internet-connection-card">
                <div class="d-flex flex-column flex-lg-row justify-content-between align-items-lg-start gap-3 mb-3">
                    <div>
                        <div class="d-flex align-items-center gap-2 flex-wrap">
                            <h6 class="mb-0">${escapeHtml(item.name || '-')}</h6>
                            <span class="internet-status-pill ${statusClass}">${escapeHtml(item.status || '-')}</span>
                        </div>
                        <div class="text-muted mt-1">${escapeHtml(item.provider || 'Ingen leverandør')} · ${escapeHtml(item.connection_type || item.technology || 'Forbindelse')}</div>
                        ${parentLabel}
                    </div>
                    <div class="d-flex gap-2 flex-wrap">
                        ${monitoring}
                        <a href="/economy/internet-connections/${item.id}" class="btn btn-sm btn-primary">
                            <i class="bi bi-eye me-1"></i>Åbn
                        </a>
                    </div>
                </div>
                <div class="internet-meta-grid">
                    <div class="internet-meta-item">
                        <span class="label">Adresse</span>
                        <span class="value">${escapeHtml(item.address || '-')}</span>
                    </div>
                    <div class="internet-meta-item">
                        <span class="label">Kredsløb</span>
                        <span class="value">${escapeHtml(item.circuit_number || '-')}</span>
                    </div>
                    <div class="internet-meta-item">
                        <span class="label">Hastighed</span>
                        <span class="value">${formatConnectionSpeed(item)}</span>
                    </div>
                    <div class="internet-meta-item">
                        <span class="label">Kost / salg</span>
                        <span class="value">${formatDKK(Number(item.monthly_cost || 0))} / ${formatDKK(Number(item.sales_price || 0))}</span>
                    </div>
                    <div class="internet-meta-item">
                        <span class="label">DB</span>
                        <span class="value">${formatDKK(Number(item.margin_amount || 0))}</span>
                    </div>
                    <div class="internet-meta-item">
                        <span class="label">IP i brug</span>
                        <span class="value">${Number(item.in_use_ip_addresses || 0)} af ${Number(item.total_ip_addresses || 0)}</span>
                    </div>
                </div>
            </div>
        `;
    }).join('');
}

function formatConnectionSpeed(item) {
    const download = Number(item.download_mbps || 0);
    const upload = Number(item.upload_mbps || 0);
    const speed = Number(item.speed_mbps || 0);
    if (download || upload) {
        return `${download || 0}/${upload || 0} Mbps`;
    }
    if (speed) {
        return `${speed} Mbps`;
    }
    return '-';
}

function toggleCustomerInternetCreate(forceState) {
    const panel = document.getElementById('customerInternetCreatePanel');
    if (!panel) return;
    const shouldShow = typeof forceState === 'boolean' ? forceState : panel.classList.contains('d-none');
    panel.classList.toggle('d-none', !shouldShow);
}

async function createCustomerInternetConnection() {
    const feedback = document.getElementById('customerInternetCreateFeedback');
    const payload = {
        customer_id: customerId,
        name: document.getElementById('customerInternetName').value.trim(),
        provider: document.getElementById('customerInternetProvider').value.trim() || null,
        circuit_number: document.getElementById('customerInternetCircuit').value.trim() || null,
        technology: document.getElementById('customerInternetTechnology').value.trim() || null,
        address: document.getElementById('customerInternetAddress').value.trim() || null,
        download_mbps: Number(document.getElementById('customerInternetDownload').value || 0) || null,
        upload_mbps: Number(document.getElementById('customerInternetUpload').value || 0) || null,
        monthly_cost: Number(document.getElementById('customerInternetCostInput').value || 0),
        sales_price: Number(document.getElementById('customerInternetSalesInput').value || 0),
        notes: document.getElementById('customerInternetNotes').value.trim() || null,
        status: 'active',
        connection_type: 'fiber',
    };

    if (!payload.name) {
        feedback.textContent = 'Navn er påkrævet.';
        return;
    }

    feedback.textContent = 'Gemmer...';
    try {
        const response = await fetch('/api/v1/internet-connections', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload),
        });
        const result = await response.json();
        if (!response.ok) {
            throw new Error(result.detail || 'Kunne ikke oprette forbindelse');
        }

        [
            'customerInternetName',
            'customerInternetProvider',
            'customerInternetCircuit',
            'customerInternetTechnology',
            'customerInternetAddress',
            'customerInternetDownload',
            'customerInternetUpload',
            'customerInternetCostInput',
            'customerInternetSalesInput',
            'customerInternetNotes',
        ].forEach((id) => {
            const field = document.getElementById(id);
            if (field) field.value = '';
        });
        feedback.textContent = 'Forbindelse oprettet.';
        await loadCustomerInternetConnections();
        toggleCustomerInternetCreate(false);
    } catch (error) {
        feedback.textContent = error.message || 'Kunne ikke oprette forbindelse';
    }
}

function editInternalComment() {
    const commentText = document.getElementById('commentText').textContent;
    const commentInput = document.getElementById('internalCommentInput');
    const displayDiv = document.getElementById('internalCommentDisplay');
    const editDiv = document.getElementById('internalCommentEdit');
    
    // Show input, populate with existing text
    commentInput.value = commentText;
    editDiv.style.display = 'block';
    displayDiv.style.display = 'none';
}

/**
 * Load and render subscription billing matrix from e-conomic
 */
async function loadBillingMatrix() {
    const loading = document.getElementById('billingMatrixLoading');
    const container = document.getElementById('billingMatrixContainer');
    const empty = document.getElementById('billingMatrixEmpty');
    
    // Show loading state
    loading.style.display = 'block';
    container.style.display = 'none';
    empty.style.display = 'none';
    
    try {
        const response = await fetch(`/api/v1/customers/${customerId}/subscriptions/billing-matrix`);
        const matrix = await response.json();
        
        console.log('📊 Billing matrix:', matrix);
        
        if (!response.ok) {
            throw new Error(matrix.detail || 'Failed to load billing matrix');
        }
        
        // Check if matrix has products
        if (!matrix.products || matrix.products.length === 0) {
            empty.style.display = 'block';
            loading.style.display = 'none';
            return;
        }
        
        // Render matrix
        renderBillingMatrix(matrix);
        
    } catch (error) {
        console.error('Failed to load billing matrix:', error);
        loading.innerHTML = `<div class="alert alert-danger"><i class="bi bi-exclamation-circle me-2"></i>${error.message}</div>`;
    }
}

function renderBillingMatrix(matrix) {
    const headerRow = document.getElementById('matrixHeaderRow');
    const bodyRows = document.getElementById('matrixBodyRows');
    
    // Get all unique months across all products
    const monthsSet = new Set();
    matrix.products.forEach(product => {
        product.rows.forEach(row => {
            monthsSet.add(row.year_month);
        });
    });
    
    const months = Array.from(monthsSet).sort();
    
    if (months.length === 0) {
        document.getElementById('billingMatrixEmpty').style.display = 'block';
        document.getElementById('billingMatrixLoading').style.display = 'none';
        return;
    }
    
    // Build header with month columns
    headerRow.innerHTML = '<th style="min-width: 200px;">Vare</th>' +
        months.map(month => {
            const date = new Date(month + '-01');
            const label = date.toLocaleDateString('da-DK', { month: 'short', year: '2-digit' });
            return `<th style="min-width: 100px; text-align: center; font-size: 0.9rem;">${label}</th>`;
        }).join('') +
        '<th style="min-width: 80px; text-align: right;">I alt</th>';
    
    // Build body with product rows
    bodyRows.innerHTML = matrix.products.map(product => {
        const monthCells = months.map(month => {
            const cell = product.rows.find(r => r.year_month === month);
            if (!cell) {
                return '<td class="text-muted text-center" style="font-size: 0.85rem;">-</td>';
            }
            
            const amount = cell.amount || 0;
            const statusBadge = getStatusBadge(cell.status);
            const tooltip = cell.period_label ? ` title="${cell.period_label}${cell.invoice_number ? ' • ' + cell.invoice_number : ''}"` : '';
            
            return `<td class="text-center" style="font-size: 0.9rem;"${tooltip}>
                <div class="d-flex flex-column align-items-center">
                    <div class="fw-500">${formatDKK(amount)}</div>
                    <div>${statusBadge}</div>
                </div>
            </td>`;
        }).join('');
        
        return `<tr>
            <td class="fw-500">${escapeHtml(product.product_name)}</td>
            ${monthCells}
            <td class="text-right fw-bold" style="text-align: right;">${formatDKK(product.total_amount)}</td>
        </tr>`;
    }).join('');
    
    // Show search container if there are products
    const searchContainer = document.getElementById('matrixSearchContainer');
    if (matrix.products.length > 0) {
        searchContainer.style.display = 'block';
    } else {
        searchContainer.style.display = 'none';
    }
    
    // Show matrix, hide loading
    document.getElementById('billingMatrixContainer').style.display = 'block';
    document.getElementById('billingMatrixLoading').style.display = 'none';
}

function getStatusBadge(status) {
    const badgeMap = {
        'paid': { color: 'success', icon: 'check-circle', label: 'Betalt' },
        'invoiced': { color: 'warning', icon: 'file-text', label: 'Faktureret' },
        'draft': { color: 'secondary', icon: 'file-earmark', label: 'Kladde' },
        'missing': { color: 'danger', icon: 'exclamation-triangle', label: 'Manglende' },
        'credited': { color: 'info', icon: 'arrow-counterclockwise', label: 'Krediteret' }
    };
    
    const badge = badgeMap[status] || { color: 'secondary', icon: 'question-circle', label: status };
    return `<span class="badge bg-${badge.color}" style="font-size: 0.75rem; margin-top: 2px;">
        <i class="bi bi-${badge.icon}" style="font-size: 0.65rem;"></i> ${badge.label}
    </span>`;
}

function formatDKK(amount) {
    if (!amount || amount === 0) return '0 kr';
    return amount.toLocaleString('da-DK', { style: 'currency', currency: 'DKK', minimumFractionDigits: 0 });
}

/**
 * Filter products in billing matrix based on search input
 */
function filterMatrixProducts() {
    const searchInput = document.getElementById('matrixSearchInput');
    const searchTerm = searchInput.value.toLowerCase();
    const tableBody = document.getElementById('matrixBodyRows');
    const rows = tableBody.getElementsByTagName('tr');
    
    let visibleCount = 0;
    
    for (let i = 0; i < rows.length; i++) {
        const row = rows[i];
        const productName = row.cells[0].textContent.toLowerCase();
        
        if (productName.includes(searchTerm)) {
            row.style.display = '';
            visibleCount++;
        } else {
            row.style.display = 'none';
        }
    }
    
    // Show message if no results
    if (visibleCount === 0 && searchTerm.length > 0) {
        if (!document.getElementById('matrixNoResults')) {
            const noResultsRow = document.createElement('tr');
            noResultsRow.id = 'matrixNoResults';
            noResultsRow.innerHTML = '<td colspan="100" class="text-center text-muted py-3"><i class="bi bi-search me-2"></i>Ingen produkter matcher søgningen</td>';
            tableBody.appendChild(noResultsRow);
        }
    } else {
        const noResultsRow = document.getElementById('matrixNoResults');
        if (noResultsRow) {
            noResultsRow.remove();
        }
    }
}

/**
 * Clear matrix search filter
 */
function clearMatrixSearch() {
    const searchInput = document.getElementById('matrixSearchInput');
    searchInput.value = '';
    filterMatrixProducts();
    searchInput.focus();
}

// Auto-load matrix when subscriptions tab is shown
document.addEventListener('DOMContentLoaded', () => {
    const subscriptionsTab = document.querySelector('a[href="#subscriptions"]');
    if (subscriptionsTab) {
        subscriptionsTab.addEventListener('shown.bs.tab', () => {
            // Load matrix if not already loaded
            if (!document.getElementById('billingMatrixContainer').innerHTML.includes('table-responsive')) {
                setTimeout(() => loadBillingMatrix(), 300);
            }
        });
    }
    
    // Auto-load matrix when billing-matrix tab is shown
    const billingMatrixTab = document.querySelector('a[href="#billing-matrix"]');
    if (billingMatrixTab) {
        billingMatrixTab.addEventListener('shown.bs.tab', () => {
            const container = document.getElementById('billingMatrixContainer');
            const loading = document.getElementById('billingMatrixLoading');
            
            // Check if we need to load
            if (loading.style.display !== 'none' && container.style.display === 'none') {
                loadBillingMatrix();
            }
        });
    }

    const acmpTab = document.querySelector('a[href="#acmp"]');
    if (acmpTab) {
        acmpTab.addEventListener('shown.bs.tab', () => {
            const loading = document.getElementById('acmpLoading');
            const container = document.getElementById('acmpContainer');
            if (loading && container && loading.style.display !== 'none' && container.style.display === 'none') {
                loadAcmpOverview();
            }
        });
    }
});
</script>

<!-- Data Consistency Comparison Modal -->
<div class="modal fade" id="consistencyModal" tabindex="-1" aria-labelledby="consistencyModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-xl">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="consistencyModalLabel">
                    <i class="bi bi-diagram-3 me-2"></i>Sammenlign Kundedata
                </h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body">
                <div class="alert alert-info">
                    <i class="bi bi-info-circle me-2"></i>
                    <strong>Vejledning:</strong> Vælg den korrekte værdi for hvert felt med uoverensstemmelser. 
                    vTiger bruges kun som læsekilde. Synkronisering skriver kun til BMC Hub og evt. e-conomic.
                </div>
                
                <div class="table-responsive">
                    <table class="table table-hover">
                        <thead>
                            <tr>
                                <th style="width: 20%;">Felt</th>
                                <th style="width: 20%;">BMC Hub</th>
                                <th style="width: 20%;">vTiger</th>
                                <th style="width: 20%;">e-conomic</th>
                                <th style="width: 20%;">Vælg Korrekt</th>
                            </tr>
                        </thead>
                        <tbody id="consistencyTableBody">
                            <!-- Populated by JavaScript -->
                        </tbody>
                    </table>
                </div>

                <div id="consistencyContactsSection" class="mt-4 d-none">
                    <h6 class="mb-3">
                        <i class="bi bi-people me-2"></i>Kontaktpersoner fra vTiger
                    </h6>
                    <div class="small text-muted mb-2">
                        Alle fundne vTiger-kontakter vises her. Marker kun de kontakter der skal oprettes, opdateres eller linkes til denne kunde i Hub.
                    </div>
                    <div id="consistencyContactsContainer" class="list-group"></div>
                </div>

                <div class="form-check mt-4">
                    <input class="form-check-input" type="checkbox" id="consistencyAddSyncOkTag">
                    <label class="form-check-label" for="consistencyAddSyncOkTag">
                        Tilføj tag "Sync OK" hvis alt lykkes
                    </label>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">
                    <i class="bi bi-x-circle me-2"></i>Luk
                </button>
                <button type="button" class="btn btn-primary" onclick="syncSelectedFields()">
                    <i class="bi bi-arrow-repeat me-2"></i>Synkroniser Valgte
                </button>
            </div>
        </div>
    </div>
</div>

{% endblock %}