{% extends "base.html" %}

{% block title %}Prepaid Cards - BMC Hub{% endblock %}

{% block content %}
<div class="container-fluid py-4">
    <!-- Header -->
    <div class="row mb-4">
        <div class="col">
            <h1 class="h3 mb-0">💳 Prepaid Cards</h1>
            <p class="text-muted">Oversigt og kontrol af kunders timekort</p>
        </div>
        <div class="col-auto">
            <button class="btn btn-primary" onclick="openCreateModal()">
                <i class="bi bi-plus-circle"></i> Opret Nyt Kort
            </button>
        </div>
    </div>

    <!-- Stats Row -->
    <div class="row g-3 mb-4" id="statsCards">
        <div class="col-md-3">
            <div class="card border-0 shadow-sm">
                <div class="card-body">
                    <div class="d-flex align-items-center">
                        <div class="flex-shrink-0">
                            <div class="rounded-circle bg-success bg-opacity-10 p-3">
                                <i class="bi bi-credit-card-2-front text-success fs-4"></i>
                            </div>
                        </div>
                        <div class="flex-grow-1 ms-3">
                            <p class="text-muted small mb-1">Aktive Kort</p>
                            <h3 class="mb-0" id="activeCount">-</h3>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card border-0 shadow-sm">
                <div class="card-body">
                    <div class="d-flex align-items-center">
                        <div class="flex-shrink-0">
                            <div class="rounded-circle bg-primary bg-opacity-10 p-3">
                                <i class="bi bi-clock-history text-primary fs-4"></i>
                            </div>
                        </div>
                        <div class="flex-grow-1 ms-3">
                            <p class="text-muted small mb-1">Tilbageværende Timer</p>
                            <h3 class="mb-0" id="remainingHours">-</h3>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card border-0 shadow-sm">
                <div class="card-body">
                    <div class="d-flex align-items-center">
                        <div class="flex-shrink-0">
                            <div class="rounded-circle bg-info bg-opacity-10 p-3">
                                <i class="bi bi-hourglass-split text-info fs-4"></i>
                            </div>
                        </div>
                        <div class="flex-grow-1 ms-3">
                            <p class="text-muted small mb-1">Brugte Timer</p>
                            <h3 class="mb-0" id="usedHours">-</h3>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card border-0 shadow-sm">
                <div class="card-body">
                    <div class="d-flex align-items-center">
                        <div class="flex-shrink-0">
                            <div class="rounded-circle bg-warning bg-opacity-10 p-3">
                                <i class="bi bi-currency-dollar text-warning fs-4"></i>
                            </div>
                        </div>
                        <div class="flex-grow-1 ms-3">
                            <p class="text-muted small mb-1">Total Omsætning</p>
                            <h3 class="mb-0" id="totalRevenue">-</h3>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <!-- Filter Bar -->
    <div class="card border-0 shadow-sm mb-4">
        <div class="card-body">
            <div class="row g-3">
                <div class="col-md-3">
                    <label class="form-label small text-muted">Status</label>
                    <select class="form-select" id="statusFilter" onchange="loadCards()">
                        <option value="">Alle</option>
                        <option value="active">Aktive</option>
                        <option value="depleted">Opbrugt</option>
                        <option value="expired">Udløbet</option>
                        <option value="cancelled">Annulleret</option>
                    </select>
                </div>
                <div class="col-md-6">
                    <label class="form-label small text-muted">Søg Kunde</label>
                    <input type="text" class="form-control" id="customerSearch" 
                           placeholder="Søg efter kundenavn eller email...">
                </div>
                <div class="col-md-3 d-flex align-items-end">
                    <button class="btn btn-outline-secondary w-100" onclick="resetFilters()">
                        <i class="bi bi-x-circle"></i> Nulstil
                    </button>
                </div>
            </div>
        </div>
    </div>

    <!-- Cards Table -->
    <div class="card border-0 shadow-sm">
        <div class="card-body">
            <div class="table-responsive">
                <table class="table table-hover align-middle" id="cardsTable">
                    <thead class="table-light">
                        <tr>
                            <th>Kortnummer</th>
                            <th>Kunde</th>
                            <th class="text-end">Købte Timer</th>
                            <th class="text-end">Brugte Timer</th>
                            <th class="text-end">Tilbage</th>
                            <th>Forbrug</th>
                            <th class="text-end">Pris/Time</th>
                            <th class="text-end">Total</th>
                            <th>Status</th>
                            <th>Udløber</th>
                            <th class="text-end">Handlinger</th>
                        </tr>
                    </thead>
                    <tbody id="cardsTableBody">
                        <tr>
                            <td colspan="11" class="text-center py-5">
                                <div class="spinner-border text-primary" role="status">
                                    <span class="visually-hidden">Loading...</span>
                                </div>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </div>
    </div>
</div>

<!-- Create Card Modal -->
<div class="modal fade" id="createCardModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">💳 Opret Nyt Prepaid Kort</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body p-4">
                <form id="createCardForm" class="needs-validation" novalidate>
                    <!-- Customer Dropdown -->
                    <div class="mb-4">
                        <label class="form-label fw-bold">Kunde <span class="text-danger">*</span></label>
                        <div class="dropdown" id="customerDropdown">
                            <button class="form-select text-start d-flex justify-content-between align-items-center" type="button" 
                                    data-bs-toggle="dropdown" aria-expanded="false" id="customerDropdownBtn">
                                <span class="text-muted">Vælg kunde...</span>
                                <i class="bi bi-chevron-down small"></i>
                            </button>
                            <div class="dropdown-menu w-100 p-2 shadow-sm" aria-labelledby="customerDropdownBtn">
                                <div class="px-2 pb-2">
                                    <input type="text" class="form-control form-control-sm" id="customerSearchInput" 
                                           placeholder="🔍 Søg kunde..." autocomplete="off">
                                </div>
                                <div id="customerList" style="max-height: 250px; overflow-y: auto;">
                                    <!-- Options will be injected here -->
                                </div>
                            </div>
                            <input type="hidden" id="customerId" required>
                            <div class="invalid-feedback">
                                Vælg venligst en kunde
                            </div>
                        </div>
                    </div>

                    <div class="row g-3 mb-3">
                        <div class="col-md-7">
                            <label class="form-label fw-bold">Antal Timer <span class="text-danger">*</span></label>
                            <div class="input-group">
                                <span class="input-group-text"><i class="bi bi-clock"></i></span>
                                <input type="number" class="form-control" id="purchasedHours" 
                                       step="0.5" min="1" required placeholder="0.0">
                            </div>
                            <div class="mt-2 d-flex gap-2">
                                <button type="button" class="btn btn-sm btn-outline-secondary flex-fill" onclick="setPurchasedHours(10)">10t</button>
                                <button type="button" class="btn btn-sm btn-outline-secondary flex-fill" onclick="setPurchasedHours(25)">25t</button>
                                <button type="button" class="btn btn-sm btn-outline-secondary flex-fill" onclick="setPurchasedHours(50)">50t</button>
                            </div>
                        </div>
                        <div class="col-md-5">
                            <label class="form-label fw-bold">Pris / Time <span class="text-danger">*</span></label>
                            <div class="input-group">
                                <input type="number" class="form-control text-end" id="pricePerHour" 
                                       step="0.01" min="0" required placeholder="0.00">
                                <span class="input-group-text">kr</span>
                            </div>
                        </div>
                    </div>

                    <div class="mb-3">
                        <label class="form-label fw-bold">Udløbsdato <small class="text-muted fw-normal">(valgfri)</small></label>
                        <div class="input-group">
                            <span class="input-group-text"><i class="bi bi-calendar"></i></span>
                            <input type="date" class="form-control" id="expiresAt">
                        </div>
                    </div>

                    <div class="mb-3">
                        <label class="form-label fw-bold">Bemærkninger</label>
                        <textarea class="form-control" id="notes" rows="3" placeholder="Interne noter..."></textarea>
                    </div>

                    <div class="alert alert-light border small text-muted d-flex align-items-center gap-2">
                        <i class="bi bi-info-circle-fill text-primary"></i> 
                        Kortnummeret genereres automatisk ved 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="createCard()">
                    <i class="bi bi-plus-circle"></i> Opret Kort
                </button>
            </div>
        </div>
    </div>
</div>

<script>
let createCardModal;

// Initialize
document.addEventListener('DOMContentLoaded', () => {
    createCardModal = new bootstrap.Modal(document.getElementById('createCardModal'));
    loadStats();
    loadCards();
    loadCustomers();
});

// Load Statistics
async function loadStats() {
    try {
        const response = await fetch('/api/v1/prepaid-cards/stats/summary');
        const stats = await response.json();
        
        document.getElementById('activeCount').textContent = stats.active_count || 0;
        document.getElementById('remainingHours').textContent = 
            parseFloat(stats.total_remaining_hours || 0).toFixed(1) + ' t';
        document.getElementById('usedHours').textContent = 
            parseFloat(stats.total_used_hours || 0).toFixed(1) + ' t';
        document.getElementById('totalRevenue').textContent = 
            new Intl.NumberFormat('da-DK', { 
                style: 'currency', 
                currency: 'DKK' 
            }).format(parseFloat(stats.total_revenue || 0));
    } catch (error) {
        console.error('Error loading stats:', error);
    }
}

// Load Cards
async function loadCards() {
    const status = document.getElementById('statusFilter').value;
    const search = document.getElementById('customerSearch').value.toLowerCase();
    
    try {
        let url = '/api/v1/prepaid-cards';
        if (status) url += `?status=${status}`;
        
        const response = await fetch(url);
        const cards = await response.json();
        
        // Filter by search
        const filtered = cards.filter(card => {
            if (!search) return true;
            const name = (card.customer_name || '').toLowerCase();
            const email = (card.customer_email || '').toLowerCase();
            return name.includes(search) || email.includes(search);
        });
        
        renderCards(filtered);
    } catch (error) {
        console.error('Error loading cards:', error);
        document.getElementById('cardsTableBody').innerHTML = `
            <tr><td colspan="10" class="text-center text-danger">
                ❌ Fejl ved indlæsning: ${error.message}
            </td></tr>
        `;
    }
}

// Render Cards Table
function renderCards(cards) {
    const tbody = document.getElementById('cardsTableBody');
    
    if (!cards || cards.length === 0) {
        tbody.innerHTML = `
            <tr><td colspan="11" class="text-center text-muted py-5">
                Ingen kort fundet
            </td></tr>
        `;
        return;
    }
    
    tbody.innerHTML = cards.map(card => {
        const statusBadge = getStatusBadge(card.status);
        const expiresAt = card.expires_at ? 
            new Date(card.expires_at).toLocaleDateString('da-DK') : '-';
        
        // Parse decimal strings to numbers
        const purchasedHours = parseFloat(card.purchased_hours);
        const usedHours = parseFloat(card.used_hours);
        const remainingHours = parseFloat(card.remaining_hours);
        const pricePerHour = parseFloat(card.price_per_hour);
        const totalAmount = parseFloat(card.total_amount);
        
        // Calculate usage percentage
        const usedPercent = purchasedHours > 0 ? Math.min(100, Math.max(0, (usedHours / purchasedHours) * 100)) : 0;
        
        // Progress bar color based on usage
        let progressClass = 'bg-success';
        if (usedPercent >= 90) progressClass = 'bg-danger';
        else if (usedPercent >= 75) progressClass = 'bg-warning';
        
        return `
            <tr>
                <td>
                    <a href="/prepaid-cards/${card.id}" class="text-decoration-none">
                        <strong>${card.card_number}</strong>
                    </a>
                </td>
                <td>
                    <div>${card.customer_name || '-'}</div>
                    <small class="text-muted">${card.customer_email || ''}</small>
                </td>
                <td class="text-end">${purchasedHours.toFixed(1)} t</td>
                <td class="text-end">${usedHours.toFixed(1)} t</td>
                <td class="text-end">
                    <strong class="${remainingHours < 5 ? 'text-danger' : 'text-success'}">
                        ${remainingHours.toFixed(1)} t
                    </strong>
                </td>
                <td>
                    <div class="progress" style="height: 20px; min-width: 100px;">
                        <div class="progress-bar ${progressClass}" 
                             role="progressbar" 
                             style="width: ${usedPercent.toFixed(0)}%" 
                             aria-valuenow="${usedPercent.toFixed(0)}" 
                             aria-valuemin="0" 
                             aria-valuemax="100">
                            ${usedPercent.toFixed(0)}%
                        </div>
                    </div>
                    <small class="text-muted">Forbrug</small>
                </td>
                <td class="text-end">${pricePerHour.toFixed(2)} kr</td>
                <td class="text-end"><strong>${totalAmount.toFixed(2)} kr</strong></td>
                <td>${statusBadge}</td>
                <td>${expiresAt}</td>
                <td class="text-end">
                    <div class="btn-group btn-group-sm">
                        <a href="/prepaid-cards/${card.id}" class="btn btn-outline-primary" 
                           title="Se detaljer">
                            <i class="bi bi-eye"></i>
                        </a>
                        ${card.status === 'active' ? `
                            <button class="btn btn-outline-warning" 
                                    onclick="cancelCard(${card.id})" title="Annuller">
                                <i class="bi bi-x-circle"></i>
                            </button>
                        ` : ''}
                    </div>
                </td>
            </tr>
        `;
    }).join('');
}

// Get Status Badge
function getStatusBadge(status) {
    const badges = {
        'active': '<span class="badge bg-success">Aktiv</span>',
        'depleted': '<span class="badge bg-secondary">Opbrugt</span>',
        'expired': '<span class="badge bg-danger">Udløbet</span>',
        'cancelled': '<span class="badge bg-warning">Annulleret</span>'
    };
    return badges[status] || status;
}

// Set purchased hours from quick template buttons
function setPurchasedHours(hours) {
    document.getElementById('purchasedHours').value = hours;
    // Optionally focus next field (pricePerHour) for quick workflow
    document.getElementById('pricePerHour').focus();
}

// Load Customers for Dropdown
let allCustomers = [];

async function loadCustomers() {
    try {
        // Fetch max customers for client-side filtering (up to 1000)
        const response = await fetch('/api/v1/customers?limit=1000');
        const data = await response.json();
        
        // Handle API response format (might be array or paginated object)
        allCustomers = Array.isArray(data) ? data : (data.customers || []);
        
        renderCustomerDropdown(allCustomers);
        
        // Setup search listener
        const searchInput = document.getElementById('customerSearchInput');
        if (searchInput) {
            searchInput.addEventListener('input', (e) => {
                const query = e.target.value.toLowerCase();
                const filtered = allCustomers.filter(c => 
                    (c.name || '').toLowerCase().includes(query) ||
                    (c.email || '').toLowerCase().includes(query)
                );
                renderCustomerDropdown(filtered);
            });
            
            // Prevent dropdown from closing when clicking input
            searchInput.addEventListener('click', (e) => e.stopPropagation());
        }
    } catch (error) {
        console.error('Error loading customers:', error);
        allCustomers = [];
        renderCustomerDropdown([]);
    }
}


function renderCustomerDropdown(customers) {
    const list = document.getElementById('customerList');
    if (!list) return;
    
    if (customers.length === 0) {
        list.innerHTML = '<div class="text-muted p-2 text-center small">Ingen kunder fundet</div>';
        return;
    }
    
    list.innerHTML = customers.map(c => `
        <a href="#" class="dropdown-item py-2 border-bottom" onclick="selectCustomer(${c.id}, '${c.name.replace(/'/g, "\\'")}')">
            <div class="fw-bold">${c.name}</div>
            ${c.email ? `<small class="text-muted">${c.email}</small>` : ''}
        </a>
    `).join('');
}

function selectCustomer(id, name) {
    document.getElementById('customerId').value = id;
    const btn = document.getElementById('customerDropdownBtn');
    btn.innerHTML = `
        <span class="fw-bold text-dark">${name}</span>
        <i class="bi bi-chevron-down small"></i>
    `;
    btn.classList.add('border-primary'); // Highlight selection
    
    // Reset search
    document.getElementById('customerSearchInput').value = '';
    renderCustomerDropdown(allCustomers);
}


// Open Create Modal
function openCreateModal() {
    const form = document.getElementById('createCardForm');
    form.reset();
    form.classList.remove('was-validated');
    
    // Reset dropdown
    document.getElementById('customerId').value = '';
    document.getElementById('customerDropdownBtn').innerHTML = `
        <span class="text-muted">Vælg kunde...</span>
        <i class="bi bi-chevron-down small"></i>
    `;
    document.getElementById('customerDropdownBtn').classList.remove('border-primary', 'is-invalid');
    
    createCardModal.show();
}

// Create Card
async function createCard() {
    const form = document.getElementById('createCardForm');
    
    // Custom validation for dropdown
    const customerId = document.getElementById('customerId').value;
    const dropdownBtn = document.getElementById('customerDropdownBtn');
    
    if (!customerId) {
        dropdownBtn.classList.add('is-invalid');
    } else {
        dropdownBtn.classList.remove('is-invalid');
    }

    if (!form.checkValidity() || !customerId) {
        form.classList.add('was-validated');
        return;
    }
    
    const data = {
        customer_id: parseInt(customerId),
        purchased_hours: parseFloat(document.getElementById('purchasedHours').value),
        price_per_hour: parseFloat(document.getElementById('pricePerHour').value),
        expires_at: document.getElementById('expiresAt').value || null,
        notes: document.getElementById('notes').value || null
    };
    
    try {
        const response = await fetch('/api/v1/prepaid-cards', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(data)
        });
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Fejl ved oprettelse');
        }
        
        createCardModal.hide();
        loadStats();
        loadCards();
        
        // Show success toast or alert
        // alert('✅ Prepaid kort oprettet!'); // Using toast instead if available, keeping alert for now
        // But let's use a nicer non-blocking notification if possible, but sticking to existing pattern
        alert('✅ Prepaid kort oprettet!');
    } catch (error) {
        console.error('Error creating card:', error);
        alert('❌ Fejl: ' + error.message);
    }
}


// Cancel Card
async function cancelCard(cardId) {
    if (!confirm('Er du sikker på at du vil annullere dette kort?')) {
        return;
    }
    
    try {
        const response = await fetch(`/api/v1/prepaid-cards/${cardId}/status`, {
            method: 'PUT',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ status: 'cancelled' })
        });
        
        if (!response.ok) throw new Error('Fejl ved annullering');
        
        loadStats();
        loadCards();
        
        alert('✅ Kort annulleret');
    } catch (error) {
        console.error('Error cancelling card:', error);
        alert('❌ Fejl: ' + error.message);
    }
}

// Reset Filters
function resetFilters() {
    document.getElementById('statusFilter').value = '';
    document.getElementById('customerSearch').value = '';
    loadCards();
}

// Live search on customer input
document.getElementById('customerSearch').addEventListener('input', loadCards);
</script>

<style>
.table th {
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--bs-secondary);
}

.card {
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15) !important;
}

.btn-group-sm .btn {
    padding: 0.25rem 0.5rem;
}

/* Custom Dropdown Styles */
#customerDropdownBtn {
    background-color: #fff;
    border: 1px solid #ced4da;
}

#customerDropdownBtn:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

#customerDropdownBtn.is-invalid {
    border-color: #dc3545;
}

#customerDropdownBtn.is-invalid ~ .invalid-feedback {
    display: block;
}

#customerList .dropdown-item:active, 
#customerList .dropdown-item.active {
    background-color: var(--bs-primary);
    color: white;
}

#customerList .dropdown-item:active small,
#customerList .dropdown-item.active small {
    color: rgba(255,255,255,0.8) !important;
}

/* Modal Styling Improvements */
#createCardModal .modal-content {
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

#createCardModal .modal-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #eee;
}

#createCardModal .input-group-text {
    background-color: #f8f9fa;
    color: #6c757d;
}

</style>
{% endblock %}