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

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

{% block extra_css %}
<style>
    .filter-btn {
        background: var(--bg-card);
        border: 1px solid rgba(0,0,0,0.1);
        color: var(--text-secondary);
        padding: 0.5rem 1.2rem;
        border-radius: 20px;
        font-size: 0.9rem;
        transition: all 0.2s;
        cursor: pointer;
    }

    .filter-btn:hover, .filter-btn.active {
        background: var(--accent);
        color: white;
        border-color: var(--accent);
    }
    
    .customer-avatar {
        width: 40px;
        height: 40px;
        border-radius: 8px;
        background: var(--accent-light);
        color: var(--accent);
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        font-size: 0.9rem;
    }
    
    .pagination-btn {
        border: 1px solid rgba(0,0,0,0.1);
        padding: 0.5rem 1rem;
        background: var(--bg-card);
        color: var(--text-primary);
        cursor: pointer;
        transition: all 0.2s;
    }
    
    .pagination-btn:hover:not(:disabled) {
        background: var(--accent-light);
        border-color: var(--accent);
    }
    
    .pagination-btn:disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }
</style>
{% endblock %}

{% block content %}
    <div class="d-flex justify-content-between align-items-center mb-5">
        <div>
            <h2 class="fw-bold mb-1">Kunder</h2>
            <p class="text-muted mb-0">Administrer dine kunder</p>
        </div>
        <div class="d-flex gap-3">
            <input type="text" id="searchInput" class="header-search" placeholder="Søg kunde, CVR, email...">
            <button class="btn btn-primary" onclick="showCreateCustomerModal()">
                <i class="bi bi-plus-lg me-2"></i>Opret Kunde
            </button>
        </div>
    </div>

    <div class="mb-4 d-flex gap-2 flex-wrap">
        <button class="filter-btn active" data-filter="all" onclick="setFilter('all')">
            Alle Kunder <span id="countAll" class="ms-1"></span>
        </button>
        <button class="filter-btn" data-filter="active" onclick="setFilter('active')">
            Aktive <span id="countActive" class="ms-1"></span>
        </button>
        <button class="filter-btn" data-filter="inactive" onclick="setFilter('inactive')">
            Inaktive <span id="countInactive" class="ms-1"></span>
        </button>
        <button class="filter-btn" data-filter="vtiger" onclick="setFilter('vtiger')">
            <i class="bi bi-cloud me-1"></i>vTiger
        </button>
        <button class="filter-btn" data-filter="local" onclick="setFilter('local')">
            <i class="bi bi-hdd me-1"></i>Lokal
        </button>
    </div>

    <div class="card p-4">
        <div class="table-responsive">
            <table class="table table-hover align-middle">
                <thead>
                    <tr>
                        <th>Virksomhed</th>
                        <th>Kontakt Info</th>
                        <th>CVR</th>
                        <th>Kilde</th>
                        <th>Status</th>
                        <th>Kontakter</th>
                        <th class="text-end">Handlinger</th>
                    </tr>
                </thead>
                <tbody id="customersTableBody">
                    <tr>
                        <td colspan="7" 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>
        
        <!-- Pagination -->
        <div class="d-flex justify-content-between align-items-center mt-4">
            <div class="text-muted small">
                Viser <span id="showingStart">0</span>-<span id="showingEnd">0</span> af <span id="totalCount">0</span> kunder
            </div>
            <div class="d-flex gap-2">
                <button class="pagination-btn" id="prevBtn" onclick="previousPage()">
                    <i class="bi bi-chevron-left"></i> Forrige
                </button>
                <button class="pagination-btn" id="nextBtn" onclick="nextPage()">
                    Næste <i class="bi bi-chevron-right"></i>
                </button>
            </div>
        </div>
    </div>
    
    <!-- Create Customer Modal -->
    <div class="modal fade" id="createCustomerModal" tabindex="-1">
        <div class="modal-dialog modal-lg">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title">Opret Ny Kunde</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <form id="createCustomerForm">
                        <!-- CVR Lookup Section -->
                        <div class="mb-4">
                            <label class="form-label">CVR-nummer</label>
                            <div class="input-group">
                                <input type="text" class="form-control" id="cvrInput" placeholder="12345678" maxlength="8">
                                <button class="btn btn-primary" type="button" id="cvrLookupBtn" onclick="lookupCVR()">
                                    <i class="bi bi-search me-2"></i>Søg CVR
                                </button>
                            </div>
                            <div class="form-text">Indtast CVR-nummer for automatisk udfyldning</div>
                            <div id="cvrLookupStatus" class="mt-2"></div>
                        </div>
                        
                        <hr class="my-4">
                        
                        <div class="row g-3">
                            <div class="col-md-12">
                                <label class="form-label">Virksomhedsnavn <span class="text-danger">*</span></label>
                                <input type="text" class="form-control" id="nameInput" required>
                            </div>
                            
                            <div class="col-md-8">
                                <label class="form-label">Adresse</label>
                                <input type="text" class="form-control" id="addressInput">
                            </div>
                            
                            <div class="col-md-4">
                                <label class="form-label">Postnummer</label>
                                <input type="text" class="form-control" id="postalCodeInput">
                            </div>
                            
                            <div class="col-md-6">
                                <label class="form-label">By</label>
                                <input type="text" class="form-control" id="cityInput">
                            </div>
                            
                            <div class="col-md-6">
                                <label class="form-label">Email</label>
                                <input type="email" class="form-control" id="emailInput">
                            </div>
                            
                            <div class="col-md-6">
                                <label class="form-label">Telefon</label>
                                <input type="text" class="form-control" id="phoneInput">
                            </div>
                            
                            <div class="col-md-6">
                                <label class="form-label">Hjemmeside</label>
                                <input type="url" class="form-control" id="websiteInput" placeholder="https://">
                            </div>
                            
                            <div class="col-12">
                                <div class="form-check">
                                    <input class="form-check-input" type="checkbox" id="isActiveInput" checked>
                                    <label class="form-check-label" for="isActiveInput">
                                        Aktiv kunde
                                    </label>
                                </div>
                            </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="createCustomer()">
                        <i class="bi bi-plus-lg me-2"></i>Opret Kunde
                    </button>
                </div>
            </div>
        </div>
    </div>
{% endblock %}

{% block extra_js %}
<script>
let currentPage = 0;
let pageSize = 20;
let currentFilter = 'all';
let searchQuery = '';
let totalCustomers = 0;

// Load customers on page load
document.addEventListener('DOMContentLoaded', () => {
    loadCustomers();
    
    // Search with debounce
    let searchTimeout;
    document.getElementById('searchInput').addEventListener('input', (e) => {
        clearTimeout(searchTimeout);
        searchTimeout = setTimeout(() => {
            searchQuery = e.target.value;
            currentPage = 0;
            loadCustomers();
        }, 300);
    });
});

function setFilter(filter) {
    currentFilter = filter;
    currentPage = 0;
    
    // Update active button
    document.querySelectorAll('.filter-btn').forEach(btn => {
        btn.classList.remove('active');
    });
    event.target.classList.add('active');
    
    loadCustomers();
}

async function loadCustomers() {
    const tbody = document.getElementById('customersTableBody');
    tbody.innerHTML = '<tr><td colspan="7" class="text-center py-5"><div class="spinner-border text-primary"></div></td></tr>';
    
    try {
        // Build query parameters
        let params = new URLSearchParams({
            limit: pageSize,
            offset: currentPage * pageSize
        });
        
        if (searchQuery) {
            params.append('search', searchQuery);
        }
        
        if (currentFilter === 'active') {
            params.append('is_active', 'true');
        } else if (currentFilter === 'inactive') {
            params.append('is_active', 'false');
        } else if (currentFilter === 'vtiger' || currentFilter === 'local') {
            params.append('source', currentFilter);
        }
        
        const response = await fetch(`/api/v1/customers?${params}`);
        const data = await response.json();
        
        totalCustomers = data.total;
        displayCustomers(data.customers);
        updatePagination(data.total);
        
    } catch (error) {
        console.error('Failed to load customers:', error);
        tbody.innerHTML = '<tr><td colspan="7" class="text-center py-5 text-danger">Kunne ikke indlæse kunder</td></tr>';
    }
}

function displayCustomers(customers) {
    const tbody = document.getElementById('customersTableBody');
    
    if (!customers || customers.length === 0) {
        tbody.innerHTML = '<tr><td colspan="7" class="text-center py-5 text-muted">Ingen kunder fundet</td></tr>';
        return;
    }
    
    tbody.innerHTML = customers.map(customer => {
        const initials = getInitials(customer.name);
        const statusBadge = customer.is_active 
            ? '<span class="badge bg-success bg-opacity-10 text-success">Aktiv</span>'
            : '<span class="badge bg-secondary bg-opacity-10 text-secondary">Inaktiv</span>';
        
        const sourceBadge = customer.vtiger_id
            ? '<span class="badge bg-primary bg-opacity-10 text-primary"><i class="bi bi-cloud me-1"></i>vTiger</span>'
            : '<span class="badge bg-secondary bg-opacity-10 text-secondary"><i class="bi bi-hdd me-1"></i>Lokal</span>';
        
        const contactCount = customer.contact_count || 0;
        
        return `
            <tr style="cursor: pointer;" onclick="viewCustomer(${customer.id})">
                <td>
                    <div class="d-flex align-items-center">
                        <div class="customer-avatar me-3">${initials}</div>
                        <div>
                            <div class="fw-bold">${escapeHtml(customer.name)}</div>
                            <div class="small text-muted">${customer.city || customer.address || '-'}</div>
                        </div>
                    </div>
                </td>
                <td>
                    <div class="fw-medium">${customer.email || '-'}</div>
                    <div class="small text-muted">${customer.phone || '-'}</div>
                </td>
                <td class="text-muted">${customer.cvr_number || '-'}</td>
                <td>${sourceBadge}</td>
                <td>${statusBadge}</td>
                <td>
                    <span class="badge bg-light text-dark border">
                        <i class="bi bi-person me-1"></i>${contactCount}
                    </span>
                </td>
                <td class="text-end">
                    <div class="btn-group">
                        <button class="btn btn-sm btn-light" onclick="event.stopPropagation(); viewCustomer(${customer.id})">
                            <i class="bi bi-eye"></i>
                        </button>
                        <button class="btn btn-sm btn-light" onclick="event.stopPropagation(); editCustomer(${customer.id})">
                            <i class="bi bi-pencil"></i>
                        </button>
                    </div>
                </td>
            </tr>
        `;
    }).join('');
}

function updatePagination(total) {
    const start = currentPage * pageSize + 1;
    const end = Math.min((currentPage + 1) * pageSize, total);
    
    document.getElementById('showingStart').textContent = total > 0 ? start : 0;
    document.getElementById('showingEnd').textContent = end;
    document.getElementById('totalCount').textContent = total;
    
    // Update buttons
    document.getElementById('prevBtn').disabled = currentPage === 0;
    document.getElementById('nextBtn').disabled = end >= total;
}

function previousPage() {
    if (currentPage > 0) {
        currentPage--;
        loadCustomers();
    }
}

function nextPage() {
    if ((currentPage + 1) * pageSize < totalCustomers) {
        currentPage++;
        loadCustomers();
    }
}

function viewCustomer(customerId) {
    window.location.href = `/customers/${customerId}`;
}

function editCustomer(customerId) {
    // TODO: Open edit modal
    console.log('Edit customer:', customerId);
}

function showCreateCustomerModal() {
    // Reset form
    document.getElementById('createCustomerForm').reset();
    document.getElementById('cvrLookupStatus').innerHTML = '';
    document.getElementById('isActiveInput').checked = true;
    
    // Show modal
    const modal = new bootstrap.Modal(document.getElementById('createCustomerModal'));
    modal.show();
}

async function lookupCVR() {
    const cvrInput = document.getElementById('cvrInput');
    const cvr = cvrInput.value.trim();
    const statusDiv = document.getElementById('cvrLookupStatus');
    const lookupBtn = document.getElementById('cvrLookupBtn');
    
    if (!cvr || cvr.length !== 8) {
        statusDiv.innerHTML = '<div class="alert alert-warning mb-0"><i class="bi bi-exclamation-triangle me-2"></i>Indtast et gyldigt 8-cifret CVR-nummer</div>';
        return;
    }
    
    // Show loading state
    lookupBtn.disabled = true;
    lookupBtn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Søger...';
    statusDiv.innerHTML = '<div class="alert alert-info mb-0"><i class="bi bi-hourglass-split me-2"></i>Henter virksomhedsoplysninger...</div>';
    
    try {
        const response = await fetch(`/api/v1/cvr/${cvr}`);
        
        if (!response.ok) {
            throw new Error('CVR ikke fundet');
        }
        
        const data = await response.json();
        
        // Auto-fill form fields
        document.getElementById('nameInput').value = data.name || '';
        document.getElementById('addressInput').value = data.address || '';
        document.getElementById('postalCodeInput').value = data.postal_code || '';
        document.getElementById('cityInput').value = data.city || '';
        document.getElementById('phoneInput').value = data.phone || '';
        document.getElementById('emailInput').value = data.email || '';
        
        statusDiv.innerHTML = '<div class="alert alert-success mb-0"><i class="bi bi-check-circle me-2"></i>Virksomhedsoplysninger hentet fra CVR-registeret</div>';
        
    } catch (error) {
        console.error('CVR lookup failed:', error);
        statusDiv.innerHTML = '<div class="alert alert-danger mb-0"><i class="bi bi-x-circle me-2"></i>Kunne ikke finde virksomhed med CVR-nummer ' + cvr + '</div>';
    } finally {
        lookupBtn.disabled = false;
        lookupBtn.innerHTML = '<i class="bi bi-search me-2"></i>Søg CVR';
    }
}

async function createCustomer() {
    const name = document.getElementById('nameInput').value.trim();
    
    if (!name) {
        alert('Virksomhedsnavn er påkrævet');
        return;
    }
    
    const customerData = {
        name: name,
        cvr_number: document.getElementById('cvrInput').value.trim() || null,
        address: document.getElementById('addressInput').value.trim() || null,
        postal_code: document.getElementById('postalCodeInput').value.trim() || null,
        city: document.getElementById('cityInput').value.trim() || null,
        email: document.getElementById('emailInput').value.trim() || null,
        phone: document.getElementById('phoneInput').value.trim() || null,
        website: document.getElementById('websiteInput').value.trim() || null,
        is_active: document.getElementById('isActiveInput').checked
    };
    
    try {
        const response = await fetch('/api/v1/customers', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify(customerData)
        });
        
        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Kunne ikke oprette kunde');
        }
        
        const newCustomer = await response.json();
        
        // Close modal
        const modal = bootstrap.Modal.getInstance(document.getElementById('createCustomerModal'));
        modal.hide();
        
        // Reload customer list
        await loadCustomers();
        
        // Show success message (optional)
        alert('Kunde oprettet succesfuldt!');
        
    } catch (error) {
        console.error('Failed to create customer:', error);
        alert('Fejl ved oprettelse af kunde: ' + error.message);
    }
}

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;
}
</script>
{% endblock %}