{% extends 'administration/base.html.twig' %}

{% block title %}Rechnungen verwalten{% endblock %}

{% block body %}
<nav aria-label="breadcrumb" class="mb-4">
  <ol class="breadcrumb bg-light p-2 rounded">
    <li class="breadcrumb-item"><a href="/admin/license-server">Lizenzserver</a></li>
    <li class="breadcrumb-item active" aria-current="page">Rechnungen</li>
  </ol>
</nav>
<div class="container-fluid">
    <div class="row mb-4">
        <div class="col-12">
            <div class="admin-card p-4">
                <div class="d-flex flex-column flex-md-row justify-content-between align-items-start align-items-md-center">
                    <div class="mb-3 mb-md-0">
                        <h2 class="gradient-text fw-bold mb-2">
                            <i class="bi bi-receipt me-3"></i>
                            Rechnungen verwalten
                        </h2>
                        <p class="text-muted mb-0">Verwalten Sie alle Rechnungen und deren Status</p>
                    </div>
                    <div class="d-flex gap-2">
                        <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#newInvoiceModal">
                            <i class="bi bi-plus me-2"></i>
                            Neue Rechnung
                        </button>
                        <button type="button" class="btn btn-success" onclick="generateRecurringInvoices()">
                            <i class="bi bi-arrow-clockwise me-2"></i>
                            Wiederkehrende Rechnungen
                        </button>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-12">
            <div class="admin-card p-4">
                <div class="d-flex justify-content-between align-items-center mb-3">
                    <h5 class="fw-bold mb-0">Alle Rechnungen</h5>
                    <div class="d-flex gap-2">
                        <input type="text" class="form-control form-control-sm" placeholder="Suchen..." value="{{ search }}" id="searchInput">
                        <select class="form-select form-select-sm" id="statusFilter">
                            <option value="">Alle Status</option>
                            <option value="pending" {{ status == 'pending' ? 'selected' : '' }}>Offen</option>
                            <option value="paid" {{ status == 'paid' ? 'selected' : '' }}>Bezahlt</option>
                            <option value="overdue" {{ status == 'overdue' ? 'selected' : '' }}>Überfällig</option>
                        </select>
                    </div>
                </div>

                <div class="table-responsive">
                    <table class="table table-hover">
                        <thead>
                            <tr>
                                <th>Rechnungsnummer</th>
                                <th>Kunde</th>
                                <th>Datum</th>
                                <th>Fällig</th>
                                <th>Betrag</th>
                                <th>Status</th>
                                <th>Aktionen</th>
                            </tr>
                        </thead>
                        <tbody>
                            {% for invoice in invoices %}
                            <tr>
                                <td>
                                    <code>{{ invoice.invoiceNumber }}</code>
                                </td>
                                <td>
                                    <div>
                                        <div class="fw-semibold">{{ invoice.customer.name }}</div>
                                        <small class="text-muted">{{ invoice.customer.email }}</small>
                                    </div>
                                </td>
                                <td>{{ invoice.invoiceDate|date('d.m.Y') }}</td>
                                <td>
                                    {% if invoice.isOverdue() %}
                                        <span class="text-danger">{{ invoice.dueDate|date('d.m.Y') }}</span>
                                    {% else %}
                                        <span class="text-success">{{ invoice.dueDate|date('d.m.Y') }}</span>
                                    {% endif %}
                                </td>
                                <td class="fw-semibold">{{ invoice.formattedTotal }}</td>
                                <td>
                                    {% if invoice.status == 'paid' %}
                                        <span class="badge bg-success">Bezahlt</span>
                                    {% elseif invoice.status == 'pending' %}
                                        {% if invoice.isOverdue() %}
                                            <span class="badge bg-danger">Überfällig</span>
                                        {% else %}
                                            <span class="badge bg-warning">Offen</span>
                                        {% endif %}
                                    {% else %}
                                        <span class="badge bg-secondary">{{ invoice.status|title }}</span>
                                    {% endif %}
                                </td>
                                <td>
                                    <div class="btn-group btn-group-sm">
                                        <button type="button" class="btn btn-outline-primary" onclick="viewInvoice({{ invoice.id }})">
                                            <i class="bi bi-eye"></i>
                                        </button>
                                        <button type="button" class="btn btn-outline-secondary" onclick="editInvoice({{ invoice.id }})">
                                            <i class="bi bi-pencil"></i>
                                        </button>
                                        <button type="button" class="btn btn-outline-success" onclick="downloadInvoice({{ invoice.id }})">
                                            <i class="bi bi-download"></i>
                                        </button>
                                        <button type="button" class="btn btn-outline-warning" onclick="sendInvoice({{ invoice.id }})">
                                            <i class="bi bi-envelope"></i>
                                        </button>
                                        {% if invoice.status == 'pending' %}
                                        <button type="button" class="btn btn-outline-info" onclick="markAsPaid({{ invoice.id }})">
                                            <i class="bi bi-check-circle"></i>
                                        </button>
                                        {% endif %}
                                    </div>
                                </td>
                            </tr>
                            {% else %}
                            <tr>
                                <td colspan="7" class="text-center text-muted py-4">
                                    <i class="bi bi-inbox fs-1 d-block mb-2"></i>
                                    Keine Rechnungen gefunden
                                </td>
                            </tr>
                            {% endfor %}
                        </tbody>
                    </table>
                </div>

                {% if totalPages > 1 %}
                <nav aria-label="Seitennavigation" class="mt-4">
                    <ul class="pagination justify-content-center">
                        {% for i in 1..totalPages %}
                        <li class="page-item {{ i == currentPage ? 'active' : '' }}">
                            <a class="page-link" href="?page={{ i }}{{ search ? '&search=' ~ search : '' }}{{ status ? '&status=' ~ status : '' }}">{{ i }}</a>
                        </li>
                        {% endfor %}
                    </ul>
                </nav>
                {% endif %}
            </div>
        </div>
    </div>
</div>

<!-- Neue Rechnung Modal -->
<div class="modal fade" id="newInvoiceModal" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Neue Rechnung erstellen</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <form id="newInvoiceForm">
                    <div class="row">
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label class="form-label">Kunden-E-Mail *</label>
                                <input type="email" class="form-control" name="customerEmail" required>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label class="form-label">Kundenname *</label>
                                <input type="text" class="form-control" name="customerName" required>
                            </div>
                        </div>
                    </div>
                    <div class="row">
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label class="form-label">Firma</label>
                                <input type="text" class="form-control" name="customerCompany">
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="mb-3">
                                <label class="form-label">Fälligkeitsdatum *</label>
                                <input type="date" class="form-control" name="dueDate" required>
                            </div>
                        </div>
                    </div>
                    <div class="mb-3">
                        <label class="form-label">Rechnungspositionen</label>
                        <div id="invoiceItems">
                            <div class="row mb-2">
                                <div class="col-md-6">
                                    <input type="text" class="form-control" name="items[0][description]" placeholder="Beschreibung" required>
                                </div>
                                <div class="col-md-2">
                                    <input type="number" class="form-control" name="items[0][quantity]" placeholder="Menge" value="1" min="1" required>
                                </div>
                                <div class="col-md-2">
                                    <input type="number" class="form-control" name="items[0][price]" placeholder="Preis" step="0.01" min="0" required>
                                </div>
                                <div class="col-md-2">
                                    <button type="button" class="btn btn-outline-danger btn-sm" onclick="removeItem(this)">
                                        <i class="bi bi-trash"></i>
                                    </button>
                                </div>
                            </div>
                        </div>
                        <button type="button" class="btn btn-outline-primary btn-sm" onclick="addItem()">
                            <i class="bi bi-plus"></i> Position hinzufügen
                        </button>
                    </div>
                </form>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Abbrechen</button>
                <button type="button" class="btn btn-primary" onclick="createInvoice()">Rechnung erstellen</button>
            </div>
        </div>
    </div>
</div>

<style>
.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
</style>

<script>
let itemCounter = 1;

function addItem() {
    const container = document.getElementById('invoiceItems');
    const newItem = document.createElement('div');
    newItem.className = 'row mb-2';
    newItem.innerHTML = `
        <div class="col-md-6">
            <input type="text" class="form-control" name="items[${itemCounter}][description]" placeholder="Beschreibung" required>
        </div>
        <div class="col-md-2">
            <input type="number" class="form-control" name="items[${itemCounter}][quantity]" placeholder="Menge" value="1" min="1" required>
        </div>
        <div class="col-md-2">
            <input type="number" class="form-control" name="items[${itemCounter}][price]" placeholder="Preis" step="0.01" min="0" required>
        </div>
        <div class="col-md-2">
            <button type="button" class="btn btn-outline-danger btn-sm" onclick="removeItem(this)">
                <i class="bi bi-trash"></i>
            </button>
        </div>
    `;
    container.appendChild(newItem);
    itemCounter++;
}

function removeItem(button) {
    button.closest('.row').remove();
}

function createInvoice() {
    const form = document.getElementById('newInvoiceForm');
    const formData = new FormData(form);
    
    // Show loading state
    const submitBtn = document.querySelector('#newInvoiceModal .btn-primary');
    const originalText = submitBtn.innerHTML;
    submitBtn.innerHTML = '<i class="bi bi-hourglass-split"></i> Erstelle...';
    submitBtn.disabled = true;
    
    fetch('/admin/license-server/invoices/create', {
        method: 'POST',
        body: formData,
        headers: {
            'X-Requested-With': 'XMLHttpRequest'
        }
    })
    .then(response => {
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }
        return response.json();
    })
    .then(data => {
        if (data.success) {
            // Close modal and reload
            const modal = bootstrap.Modal.getInstance(document.getElementById('newInvoiceModal'));
            modal.hide();
            location.reload();
        } else {
            alert('Fehler beim Erstellen der Rechnung: ' + (data.error || 'Unbekannter Fehler'));
        }
    })
    .catch(error => {
        console.error('Error:', error);
        alert('Ein Fehler ist aufgetreten: ' + error.message);
    })
    .finally(() => {
        // Reset button state
        submitBtn.innerHTML = originalText;
        submitBtn.disabled = false;
    });
}

function viewInvoice(id) {
    window.open(`/admin/license-server/invoices/${id}/view`, '_blank');
}

function editInvoice(id) {
    window.location.href = `/admin/license-server/invoices/${id}/edit`;
}

function downloadInvoice(id) {
    window.open(`/admin/license-server/invoices/${id}/download`, '_blank');
}

function sendInvoice(id) {
    if (confirm('Rechnung wirklich per E-Mail senden?')) {
        fetch(`/admin/license-server/invoices/${id}/send`, {
            method: 'POST',
            headers: {
                'X-Requested-With': 'XMLHttpRequest'
            }
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                alert('Rechnung wurde erfolgreich gesendet!');
            } else {
                alert('Fehler beim Senden: ' + data.error);
            }
        })
        .catch(error => {
            console.error('Error:', error);
            alert('Ein Fehler ist aufgetreten. Bitte versuchen Sie es erneut.');
        });
    }
}

function markAsPaid(id) {
    if (confirm('Rechnung als bezahlt markieren?')) {
        fetch(`/admin/license-server/invoices/${id}/mark-paid`, {
            method: 'POST',
            headers: {
                'X-Requested-With': 'XMLHttpRequest'
            }
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                location.reload();
            } else {
                alert('Fehler beim Markieren: ' + data.error);
            }
        })
        .catch(error => {
            console.error('Error:', error);
            alert('Ein Fehler ist aufgetreten. Bitte versuchen Sie es erneut.');
        });
    }
}

function generateRecurringInvoices() {
    if (confirm('Wiederkehrende Rechnungen generieren?')) {
        fetch('/admin/license-server/invoices/generate-recurring', {
            method: 'POST',
            headers: {
                'X-Requested-With': 'XMLHttpRequest'
            }
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                alert(`Erfolgreich ${data.count} Rechnungen generiert!`);
                location.reload();
            } else {
                alert('Fehler beim Generieren: ' + data.error);
            }
        })
        .catch(error => {
            console.error('Error:', error);
            alert('Ein Fehler ist aufgetreten. Bitte versuchen Sie es erneut.');
        });
    }
}

// Filter-Funktionalität
document.getElementById('searchInput').addEventListener('input', function() {
    const search = this.value;
    const status = document.getElementById('statusFilter').value;
    const url = new URL(window.location);
    url.searchParams.set('search', search);
    if (status) url.searchParams.set('status', status);
    window.location.href = url.toString();
});

document.getElementById('statusFilter').addEventListener('change', function() {
    const search = document.getElementById('searchInput').value;
    const status = this.value;
    const url = new URL(window.location);
    url.searchParams.set('search', search);
    if (status) url.searchParams.set('status', status);
    window.location.href = url.toString();
});

// Set default due date to 14 days from now
document.addEventListener('DOMContentLoaded', function() {
    const dueDateInput = document.querySelector('input[name="dueDate"]');
    if (dueDateInput) {
        const today = new Date();
        const dueDate = new Date(today.getTime() + (14 * 24 * 60 * 60 * 1000));
        dueDateInput.value = dueDate.toISOString().split('T')[0];
    }
});
</script>
{% endblock %}