{% extends "base.html" %}

{% block title %}Backend Verwaltung{% endblock %}

{% block head %}
<script src="https://unpkg.com/react@18/umd/react.production.min.js"></script>
<script src="https://unpkg.com/react-dom@18/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/recharts/umd/Recharts.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.7.2/font/bootstrap-icons.css" rel="stylesheet">
<style>
.hoverable-row:hover {
    background-color: rgba(0,0,0,0.05);
    cursor: pointer;
}
.card {
    transition: transform 0.2s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}
.stat-card {
    border-radius: 10px;
    border: none;
    background: linear-gradient(45deg, #3498db, #2980b9);
    color: white;
}
.stat-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}
.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
}
.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}
.action-button {
    transition: all 0.2s;
}
.action-button:hover {
    transform: scale(1.05);
}
.toast-container {
    z-index: 1051;
}
.chart-container {
    position: relative;
    margin: 20px 0;
    height: 300px;
}
.loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
</style>
{% endblock %}

{% block content %}
<form id="generateForm" class="needs-validation custom-bg p-3 rounded" novalidate>
  <div class="container-fluid py-4">
    <div class="d-flex justify-content-between align-items-center mb-4">
        <div class="btn-group">
            <button class="btn btn-primary" onclick="refreshData()">
                <i class="bi bi-arrow-clockwise"></i> Aktualisieren
            </button>
			<button class="btn btn-secondary" onclick="toggleDarkMode()">
				<i class="bi bi-moon"></i> Dark Mode
			</button>
        </div>
    </div>

    <!-- Quick Stats Row -->
    <div class="row mb-4">
        <div class="col-md-3">
            <div class="card stat-card mb-3">
                <div class="card-body text-center">
                    <i class="bi bi-images stat-icon"></i>
                    <div class="stat-value" id="totalImages">0</div>
                    <div class="stat-label">Gesamt Bilder</div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card stat-card mb-3">
                <div class="card-body text-center">
                    <i class="bi bi-folder stat-icon"></i>
                    <div class="stat-value" id="totalAlbums">0</div>
                    <div class="stat-label">Alben</div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card stat-card mb-3">
                <div class="card-body text-center">
                    <i class="bi bi-tags stat-icon"></i>
                    <div class="stat-value" id="totalCategories">0</div>
                    <div class="stat-label">Kategorien</div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card stat-card mb-3">
                <div class="card-body text-center">
                    <i class="bi bi-hdd stat-icon"></i>
                    <div class="stat-value" id="storageUsage">0 MB</div>
                    <div class="stat-label">Speicherplatz</div>
                </div>
            </div>
        </div>
    </div>

    <!-- Main Content -->
    <div class="row">
        <!-- Album Management -->
        <div id="albumStats" class="col-12 col-lg-6 mb-4">
            <div class="card h-100">
                <div class="card-header bg-primary text-white d-flex justify-content-between align-items-center">
                    <h5 class="mb-0">Album Verwaltung</h5>
                    <button class="btn btn-light btn-sm" onclick="showNewAlbumModal()">
                        <i class="bi bi-plus-lg"></i> Neu
                    </button>
                </div>
                <div class="card-body">
                    <div class="table-responsive">
                        <table class="table table-hover" id="albumTable">
                            <thead>
                                <tr>
                                    <th>
                                        <input type="checkbox" class="form-check-input" id="selectAllAlbums">
                                    </th>
                                    <th>Name</th>
                                    <th>Bilder</th>
                                    <th>Erstellt</th>
                                    <th>Aktionen</th>
                                </tr>
                            </thead>
								<tr>
								  <td>
									<div class="album-list d-flex flex-wrap">
										{% for album in albums %}
											<div class="album-item p-2">
												{{ album[1] }}
											</div>
										{% endfor %}
									</div>
								  </td>
								</tr>
                        </table>
                    </div>
                    <div id="albumPagination" class="d-flex justify-content-between align-items-center mt-3">
                        <div class="d-flex align-items-center">
                            <select class="form-select me-2" id="albumPageSize">
                                <option value="10">10</option>
                                <option value="25">25</option>
                                <option value="50">50</option>
                            </select>
                            <span>Einträge pro Seite</span>
                        </div>
                        <nav>
                            <ul class="pagination mb-0">
                                <!-- Pagination will be inserted here -->
                            </ul>
                        </nav>
                    </div>
                </div>
            </div>
        </div>

        <!-- Category Management -->
        <div id="categoryStats" class="col-12 col-lg-6 mb-4">
            <div class="card h-100">
                <div class="card-header bg-primary text-white d-flex justify-content-between align-items-center">
                    <h5 class="mb-0">Kategorie Verwaltung</h5>
                    <button class="btn btn-light btn-sm" onclick="showNewCategoryModal()">
                        <i class="bi bi-plus-lg"></i> Neu
                    </button>
                </div>
                <div class="card-body">
                    <div class="table-responsive">
                        <table class="table table-hover" id="categoryTable">
                            <thead>
                                <tr>
                                    <th>
                                        <input type="checkbox" class="form-check-input" id="selectAllCategories">
                                    </th>
                                    <th>Name</th>
                                    <th>Bilder</th>
                                    <th>Erstellt</th>
                                    <th>Aktionen</th>
                                </tr>
                            </thead>
                            <tbody id="categoryList">
                                <!-- Category rows will be inserted here -->
                            </tbody>
                        </table>
                    </div>
                    <div id="categoryPagination" class="d-flex justify-content-between align-items-center mt-3">
                        <div class="d-flex align-items-center">
                            <select class="form-select me-2" id="categoryPageSize">
                                <option value="10">10</option>
                                <option value="25">25</option>
                                <option value="50">50</option>
                            </select>
                            <span>Einträge pro Seite</span>
                        </div>
                        <nav>
                            <ul class="pagination mb-0">
                                <!-- Pagination will be inserted here -->
                            </ul>
                        </nav>
                    </div>
                </div>
            </div>
        </div>
    </div>
 </div>
</form>
    <!-- Statistics Row -->
    <!-- <div class="row">
        <div class="col-12">
            <div class="card">
                <div class="card-header bg-primary text-white">
                    <h5 class="mb-0">Statistiken</h5>
                </div>
                <div class="card-body">
                    <div class="row">
                        <div class="col-md-6">
                            <div class="chart-container">
                                <canvas id="monthlyStats"></canvas>
                                <div class="loader" id="monthlyStatsLoader">
                                    <div class="spinner-border text-primary" role="status">
                                        <span class="visually-hidden">Laden...</span>
                                    </div>
                                </div>
                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="chart-container">
                                <canvas id="categoryStats"></canvas>
                                <div class="loader" id="categoryStatsLoader">
                                    <div class="spinner-border text-primary" role="status">
                                        <span class="visually-hidden">Laden...</span>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                    <div class="row mt-4">
                        <div class="col-md-12">
                            <div class="chart-container">
                                <canvas id="storageStats"></canvas>
                                <div class="loader" id="storageStatsLoader">
                                    <div class="spinner-border text-primary" role="status">
                                        <span class="visually-hidden">Laden...</span>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div> 
  </div> -->

<!-- Modals -->
<!-- New Album Modal -->
<div class="modal fade" id="newAlbumModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Neues Album erstellen</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body">
                <form id="newAlbumForm">
                    <div class="mb-3">
                        <label for="albumName" class="form-label">Album Name</label>
                        <input type="text" class="form-control" id="albumName" required>
                    </div>
                    <div class="mb-3">
                        <label for="albumDescription" class="form-label">Beschreibung (optional)</label>
                        <textarea class="form-control" id="albumDescription" rows="3"></textarea>
                    </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="createAlbum()">Erstellen</button>
            </div>
        </div>
    </div>
</div>

<!-- New Category Modal -->
<div class="modal fade" id="newCategoryModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Neue Kategorie erstellen</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body">
                <form id="newCategoryForm">
                    <div class="mb-3">
                        <label for="categoryName" class="form-label">Kategorie Name</label>
                        <input type="text" class="form-control" id="categoryName" required>
                    </div>
                    <div class="mb-3">
                        <label for="categoryDescription" class="form-label">Beschreibung (optional)</label>
                        <textarea class="form-control" id="categoryDescription" rows="3"></textarea>
                    </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="createCategory()">Erstellen</button>
            </div>
        </div>
    </div>
</div>

<!-- Delete Confirmation Modal -->
<div class="modal fade" id="deleteModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Löschen bestätigen</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <p>Möchten Sie <span id="deleteItemName"></span> wirklich löschen?</p>
                <p class="text-danger">Diese Aktion kann nicht rückgängig gemacht werden!</p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Abbrechen</button>
                <button type="button" class="btn btn-danger" onclick="confirmDelete()">Löschen</button>
            </div>
        </div>
    </div>
</div>

<!-- Bulk Action Modal -->
<div class="modal fade" id="bulkActionModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Massenbearbeitung</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <p>Ausgewählte Elemente: <span id="selectedCount">0</span></p>
                <div class="list-group">
                    <button type="button" class="list-group-item list-group-item-action" onclick="bulkDelete()">
                        <i class="bi bi-trash"></i> Alle löschen
                    </button>
                    <button type="button" class="list-group-item list-group-item-action" onclick="mergeSelected()">
                        <i class="bi bi-arrow-join"></i> Zusammenführen
                    </button>
                    <button type="button" class="list-group-item list-group-item-action" onclick="exportSelected()">
                        <i class="bi bi-download"></i> Exportieren
                    </button>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Schließen</button>
            </div>
        </div>
    </div>
</div>

<!-- Toast Container -->
<!-- <div class="toast-container position-fixed bottom-0 end-0 p-3">
    <div id="toast" class="toast" role="alert" aria-live="assertive" aria-atomic="true">
        <div class="toast-header">
            <i class="bi bi-info-circle me-2"></i>
            <strong class="me-auto" id="toastTitle"></strong>
            <button type="button" class="btn-close" data-bs-dismiss="toast" aria-label="Close"></button>
        </div>
        <div class="toast-body" id="toastMessage"></div>
    </div>
</div> -->
{% endblock %}

{% block scripts %}
<!-- Chart.js für Statistiken -->
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>

<!-- Backend Manager Script -->
<script src="/static/backend.js"></script>

<!-- React Components -->
<script type="module">
    import AlbumManager from '/static/components/AlbumManager.js';
    import CategoryManager from '/static/components/CategoryManager.js';
    import StatsVisualization from '/static/components/StatsVisualization.js';

    // React Components initialisieren
    ReactDOM.createRoot(document.getElementById('albumManagerRoot')).render(
        React.createElement(AlbumManager)
    );

    ReactDOM.createRoot(document.getElementById('categoryManagerRoot')).render(
        React.createElement(CategoryManager)
    );

    ReactDOM.createRoot(document.getElementById('statsRoot')).render(
        React.createElement(StatsVisualization)
    );
</script>

<!-- Inline Script für zusätzliche Funktionalität -->
<script>
document.addEventListener('DOMContentLoaded', function() {
    // Dark Mode Toggle
    const darkModeToggle = document.getElementById('darkModeToggle');
    if (darkModeToggle) {
        darkModeToggle.addEventListener('click', function() {
            document.body.classList.toggle('dark-mode');
            localStorage.setItem('darkMode', document.body.classList.contains('dark-mode'));
        });

        // Dark Mode aus localStorage wiederherstellen
        if (localStorage.getItem('darkMode') === 'true') {
            document.body.classList.add('dark-mode');
        }
    }

    // Toast Funktionalität
    window.showToast = function(title, message, type = 'info') {
        const toast = document.getElementById('toast');
        const toastTitle = document.getElementById('toastTitle');
        const toastMessage = document.getElementById('toastMessage');
        
        toast.classList.remove('bg-success', 'bg-danger', 'bg-info');
        toast.classList.add(`bg-${type}`);
        toastTitle.textContent = title;
        toastMessage.textContent = message;
        
        const bsToast = new bootstrap.Toast(toast);
        bsToast.show();
    };

    // Pagination Event Listener
    document.querySelectorAll('.page-link').forEach(button => {
        button.addEventListener('click', function(e) {
            e.preventDefault();
            const page = this.getAttribute('data-page');
            loadPage(page);
        });
    });

    // Items per Page Event Listener
    document.querySelectorAll('.items-per-page').forEach(select => {
        select.addEventListener('change', function() {
            loadPage(1);
        });
    });

    // Select All Checkboxes
    document.querySelectorAll('.select-all').forEach(checkbox => {
        checkbox.addEventListener('change', function() {
            const itemCheckboxes = document.querySelectorAll(
                `.item-checkbox[data-type="${this.dataset.type}"]`
            );
            itemCheckboxes.forEach(item => item.checked = this.checked);
            updateBulkActionButton();
        });
    });

    // Bulk Action Button Update
    function updateBulkActionButton() {
        const selectedCount = document.querySelectorAll('.item-checkbox:checked').length;
        const bulkActionBtn = document.getElementById('bulkActionBtn');
        if (bulkActionBtn) {
            bulkActionBtn.disabled = selectedCount === 0;
            document.getElementById('selectedCount').textContent = selectedCount;
        }
    }

    // Initial Load
    loadPage(1);
    updateStatistics();
});

// Refresh Funktionen
async function refreshData() {
    try {
        await Promise.all([
            loadPage(1),
            updateStatistics()
        ]);
        showToast('Erfolg', 'Daten erfolgreich aktualisiert', 'success');
    } catch (error) {
        showToast('Fehler', 'Fehler beim Aktualisieren der Daten', 'danger');
    }
}

// Statistik Aktualisierung
async function updateStatistics() {
    try {
        const response = await fetch('/backend/stats');
        const stats = await response.json();
        
        // Update Quick Stats
        document.getElementById('totalImages').textContent = stats.total_images;
        document.getElementById('totalAlbums').textContent = stats.albums.total;
        document.getElementById('totalCategories').textContent = stats.categories.total;
        document.getElementById('storageUsage').textContent = 
            `${Math.round(stats.storage_usage_mb * 100) / 100} MB`;
        
        // Update Charts
        updateCharts(stats);
    } catch (error) {
        console.error('Fehler beim Laden der Statistiken:', error);
    }
}

// Chart Aktualisierung
function updateCharts(stats) {
    updateMonthlyChart(stats.monthly);
    updateCategoryChart(stats.categories);
    updateStorageChart(stats.storage);
}

function createChart(ctx, config) {
    if (window.charts && window.charts[ctx.id]) {
        window.charts[ctx.id].destroy();
    }
    window.charts = window.charts || {};
    window.charts[ctx.id] = new Chart(ctx, config);
}

// Export Funktion
async function exportSelected() {
    const selectedIds = Array.from(document.querySelectorAll('.item-checkbox:checked'))
        .map(cb => cb.dataset.id);
    
    if (selectedIds.length === 0) {
        showToast('Warnung', 'Keine Elemente ausgewählt', 'warning');
        return;
    }

    try {
        const response = await fetch('/backend/export', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ ids: selectedIds })
        });

        if (!response.ok) throw new Error('Export fehlgeschlagen');

        const blob = await response.blob();
        const url = window.URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = 'export.csv';
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
        window.URL.revokeObjectURL(url);

        showToast('Erfolg', 'Export erfolgreich', 'success');
    } catch (error) {
        showToast('Fehler', 'Export fehlgeschlagen', 'danger');
    }
}

// Error Handler
function handleError(error) {
    console.error('Fehler:', error);
    showToast('Fehler', error.message || 'Ein Fehler ist aufgetreten', 'danger');
}
</script>
{% endblock %}