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

{% block title %}Abonnementer - BMC Hub{% endblock %}

{% block content %}
<div class="container-fluid py-4">
    <div class="row mb-4">
        <div class="col">
            <h1 class="h3 mb-0">🔁 Abonnementer</h1>
            <p class="text-muted">Alle solgte, aktive abonnementer</p>
        </div>
        <div class="col-auto d-flex gap-2 align-items-start">
            <a href="/subscriptions/simply-imports" class="btn btn-outline-primary">
                <i class="bi bi-cloud-arrow-down me-1"></i>Simply Import Oversigt
            </a>
            <select class="form-select" id="subscriptionStatusFilter" style="min-width: 180px;">
                <option value="all" selected>Alle statuser</option>
                <option value="active">Aktiv</option>
                <option value="paused">Pauset</option>
                <option value="cancelled">Opsagt</option>
                <option value="draft">Kladde</option>
            </select>
        </div>
    </div>

    <div class="row g-3 mb-4" id="statsCards">
        <div class="col-md-4">
            <div class="card border-0 shadow-sm">
                <div class="card-body">
                    <p class="text-muted small mb-1">Aktive Abonnementer</p>
                    <h3 class="mb-0" id="activeCount">-</h3>
                </div>
            </div>
        </div>
        <div class="col-md-4">
            <div class="card border-0 shadow-sm">
                <div class="card-body">
                    <p class="text-muted small mb-1">Total Pris (aktive)</p>
                    <h3 class="mb-0" id="totalAmount">-</h3>
                </div>
            </div>
        </div>
        <div class="col-md-4">
            <div class="card border-0 shadow-sm">
                <div class="card-body">
                    <p class="text-muted small mb-1">Gns. Pris</p>
                    <h3 class="mb-0" id="avgAmount">-</h3>
                </div>
            </div>
        </div>
    </div>

    <div class="card border-0 shadow-sm">
        <div class="card-header bg-white border-0 py-3">
            <h5 class="mb-0" id="subscriptionsTitle">Abonnementer</h5>
        </div>
        <div class="card-body p-0">
            <div class="table-responsive">
                <table class="table table-hover align-middle mb-0">
                    <thead class="bg-light">
                        <tr>
                            <th>Abonnement</th>
                            <th>Kunde</th>
                            <th>Sag</th>
                            <th>Produkt</th>
                            <th>Interval</th>
                            <th>Pris</th>
                            <th>Start</th>
                            <th>Status</th>
                            <th width="150">Handlinger</th>
                        </tr>
                    </thead>
                    <tbody id="subscriptionsBody">
                        <tr>
                            <td colspan="9" class="text-center text-muted py-5">
                                <span class="spinner-border spinner-border-sm me-2"></span>Indlaeser...
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</div>

<!-- Edit Subscription Modal -->
<div class="modal fade" id="editModal" tabindex="-1">
    <div class="modal-dialog modal-xl">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Rediger Abonnement</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <input type="hidden" id="editSubId">
                
                <div class="row">
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Produkt navn</label>
                            <input type="text" class="form-control" id="editProductName">
                        </div>
                    </div>
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Pris (DKK)</label>
                            <input type="number" class="form-control" id="editPrice" step="0.01" min="0">
                        </div>
                    </div>
                </div>
                
                <div class="row">
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Billing interval</label>
                            <select class="form-select" id="editInterval">
                                <option value="daily">Daglig</option>
                                <option value="biweekly">Hver 14. dag</option>
                                <option value="monthly">Månedlig</option>
                                <option value="quarterly">Kvartalsvis</option>
                                <option value="yearly">Årlig</option>
                            </select>
                        </div>
                    </div>
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Billing dag (1-31)</label>
                            <input type="number" class="form-control" id="editBillingDay" min="1" max="31">
                        </div>
                    </div>
                </div>
                
                <div class="row">
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Start dato</label>
                            <input type="date" class="form-control" id="editStartDate">
                        </div>
                    </div>
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Slut dato (valgfri)</label>
                            <input type="date" class="form-control" id="editEndDate">
                        </div>
                    </div>
                </div>
                
                <div class="row">
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Periode start <i class="bi bi-info-circle" title="Startdato for nuværende faktureringsperiode"></i></label>
                            <input type="date" class="form-control" id="editPeriodStart">
                        </div>
                    </div>
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Næste faktura dato <i class="bi bi-info-circle" title="Dato for næste automatiske faktura"></i></label>
                            <input type="date" class="form-control" id="editNextInvoiceDate">
                        </div>
                    </div>
                </div>
                
                <div class="row">
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Opsigelsesfrist (dage)</label>
                            <input type="number" class="form-control" id="editNoticePeriod" min="0" value="30">
                        </div>
                    </div>
                    <div class="col-md-6">
                        <div class="mb-3">
                            <label class="form-label">Status</label>
                            <select class="form-select" id="editStatus">
                                <option value="draft">Kladde</option>
                                <option value="active">Aktiv</option>
                                <option value="paused">Pauset</option>
                                <option value="cancelled">Opsagt</option>
                            </select>
                        </div>
                    </div>
                </div>
                
                <div class="mb-3">
                    <label class="form-label">Noter</label>
                    <textarea class="form-control" id="editNotes" rows="3"></textarea>
                </div>
                
                <hr class="my-4">
                
                <!-- Line Items Section -->
                <div class="mb-3">
                    <div class="d-flex justify-content-between align-items-center mb-3">
                        <h6 class="mb-0">📦 Abonnementsvarer</h6>
                        <button type="button" class="btn btn-sm btn-outline-primary" onclick="addLineItem()">
                            <i class="bi bi-plus-circle"></i> Tilføj vare
                        </button>
                    </div>
                    
                    <div class="table-responsive">
                        <table class="table table-sm table-bordered" id="lineItemsTable">
                            <thead class="table-light">
                                <tr>
                                    <th width="40%">Beskrivelse</th>
                                    <th width="15%">Antal</th>
                                    <th width="20%">Pris/stk</th>
                                    <th width="20%">Total</th>
                                    <th width="5%"></th>
                                </tr>
                            </thead>
                            <tbody id="lineItemsBody">
                                <!-- Line items will be inserted here -->
                            </tbody>
                            <tfoot>
                                <tr class="table-light">
                                    <td colspan="3" class="text-end"><strong>Total:</strong></td>
                                    <td><strong id="lineItemsTotal">0,00 kr</strong></td>
                                    <td></td>
                                </tr>
                            </tfoot>
                        </table>
                    </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="saveEdit()">Gem ændringer</button>
            </div>
        </div>
    </div>
</div>

<!-- Cancel Subscription Modal -->
<div class="modal fade" id="cancelModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header bg-danger text-white">
                <h5 class="modal-title">Opsig Abonnement</h5>
                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <input type="hidden" id="cancelSubId">
                <div class="alert alert-warning">
                    <i class="bi bi-exclamation-triangle me-2"></i>
                    Dette opretter en opsigelsessag og beregner slutdato baseret på opsigelsesfrist.
                </div>
                <p><strong>Abonnement:</strong> <span id="cancelSubName"></span></p>
                <p><strong>Kunde:</strong> <span id="cancelCustomerName"></span></p>
                <p><strong>Opsigelsesfrist:</strong> <span id="cancelNoticeDays"></span> dage</p>
                <p><strong>Beregnet slutdato:</strong> <span id="cancelEndDate"></span></p>
                <div class="mb-3 mt-4">
                    <label class="form-label">Årsag til opsigelse</label>
                    <textarea class="form-control" id="cancelReason" rows="3" placeholder="Angiv årsag..."></textarea>
                </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="confirmCancel()">Opsig abonnement</button>
            </div>
        </div>
    </div>
</div>

<script>
let currentSubscriptions = [];
let currentStagingCustomerKey = null;

function stagingStatusBadge(status) {
    const badges = {
        pending: '<span class="badge bg-light text-dark">Pending</span>',
        mapped: '<span class="badge bg-info text-dark">Mapped</span>',
        approved: '<span class="badge bg-success">Approved</span>',
        error: '<span class="badge bg-danger">Fejl</span>'
    };
    return badges[status] || `<span class="badge bg-light text-dark">${status || '-'}</span>`;
}

function escapeHtml(value) {
    return String(value || '')
        .replaceAll('&', '&amp;')
        .replaceAll('<', '&lt;')
        .replaceAll('>', '&gt;')
        .replaceAll('"', '&quot;')
        .replaceAll("'", '&#039;');
}

async function importSimplyStaging() {
    try {
        const response = await fetch('/api/v1/simply-subscription-staging/import', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' }
        });
        const data = await response.json();
        if (!response.ok) {
            throw new Error(data.detail || 'Import fejlede');
        }

        alert(`✅ Import færdig\nHentet: ${data.fetched}\nUpserted: ${data.upserted}\nAuto-mapped: ${data.auto_mapped}`);
        await loadStagingCustomers();
        await loadStagingOverview();
    } catch (err) {
        alert(`❌ Import fejl: ${err.message}`);
    }
}

async function loadStagingOverview() {
    const tbody = document.getElementById('stagingOverviewBody');
    if (!tbody) return;

    const status = document.getElementById('stagingOverviewStatusFilter')?.value || 'all';
    tbody.innerHTML = '<tr><td colspan="9" class="text-muted text-center py-3">Indlæser...</td></tr>';

    try {
        const response = await fetch(`/api/v1/simply-subscription-staging/rows?status=${encodeURIComponent(status)}&limit=500`);
        const rows = await response.json();
        if (!response.ok) {
            throw new Error(rows.detail || 'Kunne ikke hente oversigt');
        }

        if (!rows || rows.length === 0) {
            tbody.innerHTML = '<tr><td colspan="9" class="text-muted text-center py-3">Ingen importerede rækker</td></tr>';
            return;
        }

        tbody.innerHTML = rows.map(row => {
            const amount = formatCurrency(row.source_total_amount || 0);
            const updated = row.updated_at ? formatDate(row.updated_at) : '-';
            const hubCustomer = row.hub_customer_name
                ? `${escapeHtml(row.hub_customer_name)} (#${row.hub_customer_id})`
                : (row.hub_customer_id ? `#${row.hub_customer_id}` : '-');
            const sag = row.hub_sag_id ? `<a href="/sag/${row.hub_sag_id}">#${row.hub_sag_id}</a>` : '-';
            return `
                <tr>
                    <td>${row.id}</td>
                    <td>${escapeHtml(row.source_salesorder_no || '-')}</td>
                    <td>${escapeHtml(row.source_customer_name || '-')}</td>
                    <td>${hubCustomer}</td>
                    <td>${sag}</td>
                    <td>${escapeHtml(row.source_subject || '-')}</td>
                    <td>${amount}</td>
                    <td>${stagingStatusBadge(row.approval_status)}</td>
                    <td>${updated}</td>
                </tr>
            `;
        }).join('');
    } catch (err) {
        tbody.innerHTML = `<tr><td colspan="9" class="text-danger text-center py-3">${escapeHtml(err.message)}</td></tr>`;
    }
}

async function loadStagingCustomers() {
    const tbody = document.getElementById('stagingCustomersBody');
    if (!tbody) return;

    try {
        const response = await fetch('/api/v1/simply-subscription-staging/customers?status=all');
        const rows = await response.json();
        if (!response.ok) {
            throw new Error(rows.detail || 'Kunne ikke hente kø');
        }

        if (!rows || rows.length === 0) {
            tbody.innerHTML = '<tr><td colspan="4" class="text-muted text-center py-3">Ingen rækker i parkeringsplads</td></tr>';
            return;
        }

        tbody.innerHTML = rows.map(item => {
            const encodedKey = encodeURIComponent(item.customer_key || '');
            const safeName = escapeHtml(item.source_customer_name || 'Ukendt');
            return `
                <tr>
                    <td>${safeName}</td>
                    <td>${item.row_count || 0}</td>
                    <td>${item.mapped_count || 0}</td>
                    <td>
                        <button class="btn btn-sm btn-outline-primary" onclick="openStagingCustomerEncoded('${encodedKey}', '${safeName}')">Åbn</button>
                    </td>
                </tr>
            `;
        }).join('');
    } catch (err) {
        tbody.innerHTML = `<tr><td colspan="4" class="text-danger text-center py-3">${escapeHtml(err.message)}</td></tr>`;
    }
}

function openStagingCustomerEncoded(encodedKey, safeName) {
    const key = decodeURIComponent(encodedKey || '');
    openStagingCustomer(key, safeName);
}

async function openStagingCustomer(customerKey, customerName) {
    currentStagingCustomerKey = customerKey;
    document.getElementById('selectedStagingCustomerName').textContent = customerName || 'Ukendt';
    document.getElementById('approveSelectedBtn').disabled = false;

    const tbody = document.getElementById('stagingRowsBody');
    tbody.innerHTML = '<tr><td colspan="7" class="text-muted text-center py-3">Indlæser...</td></tr>';

    try {
        const response = await fetch(`/api/v1/simply-subscription-staging/customers/${encodeURIComponent(customerKey)}/rows`);
        const rows = await response.json();
        if (!response.ok) {
            throw new Error(rows.detail || 'Kunne ikke hente rækker');
        }

        if (!rows || rows.length === 0) {
            tbody.innerHTML = '<tr><td colspan="7" class="text-muted text-center py-3">Ingen rækker fundet</td></tr>';
            return;
        }

        tbody.innerHTML = rows.map(row => {
            const approved = row.approval_status === 'approved';
            const amount = formatCurrency(row.source_total_amount || 0);
            const title = row.source_subject || row.source_salesorder_no || row.source_record_id || `#${row.id}`;
            return `
                <tr>
                    <td>
                        <input type="checkbox" class="form-check-input staging-row-check" data-row-id="${row.id}" ${approved ? 'disabled' : 'checked'}>
                    </td>
                    <td>
                        <div class="fw-semibold">${escapeHtml(title)}</div>
                        <div class="small text-muted">${escapeHtml(row.source_billing_frequency || '-')}</div>
                    </td>
                    <td>${amount}</td>
                    <td>
                        <input type="number" class="form-control form-control-sm" id="mapCustomer-${row.id}" value="${row.hub_customer_id || ''}" placeholder="kunde id">
                    </td>
                    <td>
                        <input type="number" class="form-control form-control-sm" id="mapSag-${row.id}" value="${row.hub_sag_id || ''}" placeholder="auto">
                    </td>
                    <td>
                        ${stagingStatusBadge(row.approval_status)}
                        ${row.approval_error ? `<div class="small text-danger mt-1">${escapeHtml(row.approval_error)}</div>` : ''}
                    </td>
                    <td>
                        <button class="btn btn-sm btn-outline-secondary" onclick="saveStagingMap(${row.id})" ${approved ? 'disabled' : ''}>Gem map</button>
                    </td>
                </tr>
            `;
        }).join('');
    } catch (err) {
        tbody.innerHTML = `<tr><td colspan="7" class="text-danger text-center py-3">${escapeHtml(err.message)}</td></tr>`;
    }
}

async function saveStagingMap(rowId) {
    const customerValue = document.getElementById(`mapCustomer-${rowId}`)?.value;
    const sagValue = document.getElementById(`mapSag-${rowId}`)?.value;

    if (!customerValue) {
        alert('Angiv Hub kunde-ID før mapping');
        return;
    }

    try {
        const response = await fetch(`/api/v1/simply-subscription-staging/${rowId}/map`, {
            method: 'PATCH',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({
                hub_customer_id: parseInt(customerValue, 10),
                hub_sag_id: sagValue ? parseInt(sagValue, 10) : null,
            })
        });
        const result = await response.json();
        if (!response.ok) {
            throw new Error(result.detail || 'Kunne ikke gemme mapping');
        }

        if (currentStagingCustomerKey) {
            await openStagingCustomer(currentStagingCustomerKey, document.getElementById('selectedStagingCustomerName').textContent);
        }
        await loadStagingCustomers();
        await loadStagingOverview();
    } catch (err) {
        alert(`❌ Mapping fejl: ${err.message}`);
    }
}

async function approveSelectedStagingRows() {
    if (!currentStagingCustomerKey) {
        alert('Vælg en kunde først');
        return;
    }

    const selectedRowIds = Array.from(document.querySelectorAll('.staging-row-check:checked'))
        .map(el => parseInt(el.getAttribute('data-row-id'), 10))
        .filter(Number.isInteger);

    if (selectedRowIds.length === 0) {
        alert('Vælg mindst én række');
        return;
    }

    try {
        const response = await fetch(`/api/v1/simply-subscription-staging/customers/${encodeURIComponent(currentStagingCustomerKey)}/approve`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ row_ids: selectedRowIds })
        });
        const result = await response.json();
        if (!response.ok) {
            throw new Error(result.detail || 'Godkendelse fejlede');
        }

        alert(`✅ Godkendelse færdig\nApproved: ${result.approved_count}\nErrors: ${result.error_count}`);
        await openStagingCustomer(currentStagingCustomerKey, document.getElementById('selectedStagingCustomerName').textContent);
        await loadStagingCustomers();
        await loadStagingOverview();
        await loadSubscriptions();
    } catch (err) {
        alert(`❌ Godkendelsesfejl: ${err.message}`);
    }
}

async function loadSubscriptions() {
    try {
        const status = document.getElementById('subscriptionStatusFilter')?.value || 'all';
        const stats = await fetch(`/api/v1/sag-subscriptions/stats/summary?status=${encodeURIComponent(status)}`).then(r => r.json());
        document.getElementById('activeCount').textContent = stats.subscription_count || 0;
        document.getElementById('totalAmount').textContent = formatCurrency(stats.total_amount || 0);
        document.getElementById('avgAmount').textContent = formatCurrency(stats.avg_amount || 0);

        const subscriptions = await fetch(`/api/v1/sag-subscriptions?status=${encodeURIComponent(status)}`).then(r => r.json());
        currentSubscriptions = subscriptions;
        renderSubscriptions(subscriptions);

        const title = document.getElementById('subscriptionsTitle');
        if (title) {
            const labelMap = {
                all: 'Alle abonnementer',
                active: 'Aktive abonnementer',
                paused: 'Pausede abonnementer',
                cancelled: 'Opsagte abonnementer',
                draft: 'Kladder'
            };
            title.textContent = labelMap[status] || 'Abonnementer';
        }
    } catch (e) {
        console.error('Error loading subscriptions:', e);
        document.getElementById('subscriptionsBody').innerHTML = `
            <tr><td colspan="9" class="text-center text-danger py-5">
                <i class="bi bi-exclamation-triangle fs-1 mb-3"></i>
                <p>Fejl ved indlaesning</p>
            </td></tr>
        `;
    }
}

function renderSubscriptions(subscriptions) {
    const tbody = document.getElementById('subscriptionsBody');

    if (!subscriptions || subscriptions.length === 0) {
        tbody.innerHTML = `
            <tr><td colspan="9" class="text-center text-muted py-5">
                <i class="bi bi-inbox fs-1 mb-3"></i>
                <p>Ingen aktive abonnementer</p>
            </td></tr>
        `;
        return;
    }

    tbody.innerHTML = subscriptions.map(sub => {
        const intervalLabel = formatInterval(sub.billing_interval);
        const statusBadge = getStatusBadge(sub.status);
        const sagLink = sub.sag_id ? `<a href="/sag/${sub.sag_id}">${sub.sag_title || 'Sag #' + sub.sag_id}</a>` : '-';
        const subNumber = sub.subscription_number || `#${sub.id}`;
        
        // Show product name with item count if available
        let productDisplay = sub.product_name || '-';
        if (sub.line_items && sub.line_items.length > 0) {
            productDisplay = `${sub.product_name} <span class="badge bg-light text-dark">${sub.line_items.length} varer</span>`;
        }
        
        const canEdit = sub.status !== 'cancelled';
        const canCancel = sub.status === 'active' || sub.status === 'paused';
        
        const actions = `
            <div class="btn-group btn-group-sm">
                ${canEdit ? `<button class="btn btn-outline-primary" onclick="openEditModal(${sub.id})" title="Rediger">
                    <i class="bi bi-pencil"></i>
                </button>` : ''}
                ${canCancel ? `<button class="btn btn-outline-danger" onclick="openCancelModal(${sub.id})" title="Opsig">
                    <i class="bi bi-x-circle"></i>
                </button>` : ''}
            </div>
        `;

        return `
            <tr>
                <td><strong>${subNumber}</strong></td>
                <td>${sub.customer_name || '-'}</td>
                <td>${sagLink}</td>
                <td>${productDisplay}</td>
                <td>${intervalLabel}${sub.billing_day ? ' (dag ' + sub.billing_day + ')' : ''}</td>
                <td>${formatCurrency(sub.price || 0)}</td>
                <td>${formatDate(sub.start_date)}</td>
                <td>${statusBadge}</td>
                <td>${actions}</td>
            </tr>
        `;
    }).join('');
}

async function openEditModal(subId) {
    try {
        const response = await fetch(`/api/v1/sag-subscriptions/${subId}`);
        if (!response.ok) {
            throw new Error(`HTTP ${response.status}: ${response.statusText}`);
        }
        const sub = await response.json();
        
        console.log('Loaded subscription:', sub);
        
        document.getElementById('editSubId').value = sub.id || '';
        document.getElementById('editProductName').value = sub.product_name || '';
        document.getElementById('editPrice').value = sub.price || 0;
        document.getElementById('editInterval').value = sub.billing_interval || 'monthly';
        document.getElementById('editBillingDay').value = sub.billing_day || 1;
        document.getElementById('editStartDate').value = sub.start_date || '';
        document.getElementById('editEndDate').value = sub.end_date || '';
        document.getElementById('editPeriodStart').value = sub.period_start || '';
        document.getElementById('editNextInvoiceDate').value = sub.next_invoice_date || '';
        document.getElementById('editNoticePeriod').value = sub.notice_period_days || 30;
        document.getElementById('editStatus').value = sub.status || 'draft';
        document.getElementById('editNotes').value = sub.notes || '';
        
        // Load line items
        renderLineItems(sub.line_items || []);
        
        new bootstrap.Modal(document.getElementById('editModal')).show();
    } catch (e) {
        console.error('Error loading subscription:', e);
        alert('Fejl ved indlæsning af abonnement: ' + e.message);
    }
}

let lineItemsData = [];

function renderLineItems(items) {
    lineItemsData = items.map((item, idx) => ({
        id: item.id || null,
        description: item.description || '',
        quantity: item.quantity || 1,
        unit_price: item.unit_price || 0,
        product_id: item.product_id || null
    }));
    
    updateLineItemsTable();
}

function updateLineItemsTable() {
    const tbody = document.getElementById('lineItemsBody');
    
    if (lineItemsData.length === 0) {
        tbody.innerHTML = '<tr><td colspan="5" class="text-center text-muted">Ingen varer - klik "Tilføj vare" for at tilføje</td></tr>';
        document.getElementById('lineItemsTotal').textContent = '0,00 kr';
        return;
    }
    
    tbody.innerHTML = lineItemsData.map((item, idx) => {
        const total = (parseFloat(item.quantity) || 0) * (parseFloat(item.unit_price) || 0);
        return `
            <tr>
                <td>
                    <input type="text" class="form-control form-control-sm" 
                           value="${item.description}" 
                           onchange="updateLineItem(${idx}, 'description', this.value)"
                           placeholder="Beskrivelse">
                </td>
                <td>
                    <input type="number" class="form-control form-control-sm" 
                           value="${item.quantity}" 
                           step="0.01" min="0"
                           onchange="updateLineItem(${idx}, 'quantity', this.value)">
                </td>
                <td>
                    <input type="number" class="form-control form-control-sm" 
                           value="${item.unit_price}" 
                           step="0.01" min="0"
                           onchange="updateLineItem(${idx}, 'unit_price', this.value)">
                </td>
                <td class="align-middle">${formatCurrency(total)}</td>
                <td class="text-center">
                    <button type="button" class="btn btn-sm btn-outline-danger" 
                            onclick="removeLineItem(${idx})" title="Fjern">
                        <i class="bi bi-trash"></i>
                    </button>
                </td>
            </tr>
        `;
    }).join('');
    
    calculateTotal();
}

function addLineItem() {
    lineItemsData.push({
        id: null,
        description: '',
        quantity: 1,
        unit_price: 0,
        product_id: null
    });
    updateLineItemsTable();
}

function removeLineItem(idx) {
    if (confirm('Er du sikker på at du vil fjerne denne vare?')) {
        lineItemsData.splice(idx, 1);
        updateLineItemsTable();
    }
}

function updateLineItem(idx, field, value) {
    lineItemsData[idx][field] = value;
    updateLineItemsTable();
}

function calculateTotal() {
    const total = lineItemsData.reduce((sum, item) => {
        return sum + ((parseFloat(item.quantity) || 0) * (parseFloat(item.unit_price) || 0));
    }, 0);
    document.getElementById('lineItemsTotal').textContent = formatCurrency(total);
    // Also update the main price field
    document.getElementById('editPrice').value = total.toFixed(2);
}

async function saveEdit() {
    try {
        const subId = document.getElementById('editSubId').value;
        
        // Validate line items
        const validLineItems = lineItemsData.filter(item => {
            return item.description && item.description.trim() !== '' && 
                   parseFloat(item.quantity) > 0;
        });
        
        if (validLineItems.length === 0) {
            alert('⚠️ Du skal tilføje mindst én vare');
            return;
        }
        
        const payload = {
            product_name: document.getElementById('editProductName').value,
            price: parseFloat(document.getElementById('editPrice').value),
            billing_interval: document.getElementById('editInterval').value,
            billing_day: parseInt(document.getElementById('editBillingDay').value),
            start_date: document.getElementById('editStartDate').value || null,
            end_date: document.getElementById('editEndDate').value || null,
            period_start: document.getElementById('editPeriodStart').value || null,
            next_invoice_date: document.getElementById('editNextInvoiceDate').value || null,
            notice_period_days: parseInt(document.getElementById('editNoticePeriod').value),
            status: document.getElementById('editStatus').value,
            notes: document.getElementById('editNotes').value,
            line_items: validLineItems
        };
        
        const response = await fetch(`/api/v1/sag-subscriptions/${subId}`, {
            method: 'PATCH',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload)
        });
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Failed to update');
        }
        
        bootstrap.Modal.getInstance(document.getElementById('editModal')).hide();
        loadSubscriptions();
        alert('✅ Abonnement opdateret');
    } catch (e) {
        alert('❌ Fejl ved opdatering: ' + e.message);
    }
}

async function openCancelModal(subId) {
    try {
        const sub = await fetch(`/api/v1/sag-subscriptions/${subId}`).then(r => r.json());
        const noticeDays = sub.notice_period_days || 30;
        const endDate = new Date();
        endDate.setDate(endDate.getDate() + noticeDays);
        
        document.getElementById('cancelSubId').value = sub.id;
        document.getElementById('cancelSubName').textContent = sub.product_name || 'Ukendt';
        document.getElementById('cancelCustomerName').textContent = sub.customer_name || 'Ukendt';
        document.getElementById('cancelNoticeDays').textContent = noticeDays;
        document.getElementById('cancelEndDate').textContent = endDate.toLocaleDateString('da-DK');
        document.getElementById('cancelReason').value = '';
        
        new bootstrap.Modal(document.getElementById('cancelModal')).show();
    } catch (e) {
        alert('Fejl ved indlæsning af abonnement: ' + e.message);
    }
}

async function confirmCancel() {
    try {
        const subId = document.getElementById('cancelSubId').value;
        const reason = document.getElementById('cancelReason').value;
        
        const response = await fetch(`/api/v1/subscriptions/${subId}/cancel`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ reason, user_id: 1 })
        });
        
        if (!response.ok) throw new Error('Failed to cancel');
        
        const result = await response.json();
        bootstrap.Modal.getInstance(document.getElementById('cancelModal')).hide();
        loadSubscriptions();
        
        alert(`✅ Abonnement opsagt\nSlutdato: ${new Date(result.end_date).toLocaleDateString('da-DK')}\nSag oprettet: #${result.cancellation_case_id}`);
    } catch (e) {
        alert('❌ Fejl ved opsigelse: ' + e.message);
    }
}

function formatInterval(interval) {
    const map = {
        'daily': 'Daglig',
        'biweekly': '14-dage',
        'monthly': 'Maaned',
        'quarterly': 'Kvartal',
        'yearly': 'Aar'
    };
    return map[interval] || interval || '-';
}

function getStatusBadge(status) {
    const badges = {
        'active': '<span class="badge bg-success">Aktiv</span>',
        'paused': '<span class="badge bg-warning">Pauset</span>',
        'cancelled': '<span class="badge bg-secondary">Opsagt</span>',
        'draft': '<span class="badge bg-light text-dark">Kladde</span>'
    };
    return badges[status] || status || '-';
}

function formatCurrency(amount) {
    return new Intl.NumberFormat('da-DK', {
        style: 'currency',
        currency: 'DKK',
        minimumFractionDigits: 0,
        maximumFractionDigits: 0
    }).format(amount);
}

function formatDate(dateStr) {
    if (!dateStr) return '-';
    const date = new Date(dateStr);
    return date.toLocaleDateString('da-DK');
}

document.addEventListener('DOMContentLoaded', () => {
    const filter = document.getElementById('subscriptionStatusFilter');
    if (filter) {
        filter.addEventListener('change', loadSubscriptions);
    }
    loadSubscriptions();
});
</script>
{% endblock %}