{% extends "admin/base_site.html" %}
{% load static i18n %}

{% block extrahead %}
{{ block.super }}
<script src="https://cdn.jsdelivr.net/npm/sortablejs@1.15.0/Sortable.min.js"></script>
<style>
    .visual-reorder-container {
        padding: 20px;
        max-width: 1400px;
        margin: 0 auto;
    }

    .visual-reorder-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 30px;
        flex-wrap: wrap;
        gap: 15px;
    }

    .visual-reorder-header h1 {
        margin: 0;
        font-size: 24px;
        color: #333;
    }

    .header-actions {
        display: flex;
        gap: 10px;
    }

    .btn-back {
        background: #6c757d;
        color: white;
        padding: 10px 20px;
        border-radius: 6px;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: background 0.2s;
    }

    .btn-back:hover {
        background: #5a6268;
        color: white;
    }

    .btn-save {
        background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
        color: white;
        padding: 10px 24px;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-size: 14px;
        font-weight: 500;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: transform 0.2s, box-shadow 0.2s;
        box-shadow: 0 2px 8px rgba(40, 167, 69, 0.3);
    }

    .btn-save:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
    }

    .btn-save:disabled {
        background: #ccc;
        cursor: not-allowed;
        transform: none;
        box-shadow: none;
    }

    .slides-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 20px;
    }

    .slide-card {
        background: white;
        border-radius: 12px;
        overflow: hidden;
        box-shadow: 0 2px 12px rgba(0,0,0,0.08);
        transition: transform 0.2s, box-shadow 0.2s;
        cursor: grab;
        position: relative;
    }

    .slide-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    }

    .slide-card:active {
        cursor: grabbing;
    }

    .slide-card.sortable-ghost {
        opacity: 0.4;
        transform: scale(0.95);
    }

    .slide-card.sortable-chosen {
        box-shadow: 0 12px 32px rgba(102, 126, 234, 0.3);
    }

    .slide-image {
        width: 100%;
        height: 180px;
        object-fit: cover;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    }

    .slide-image-placeholder {
        width: 100%;
        height: 180px;
        background: linear-gradient(135deg, #e0e0e0 0%, #bdbdbd 100%);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #757575;
        font-size: 14px;
    }

    .slide-content {
        padding: 16px;
    }

    .slide-order {
        position: absolute;
        top: 12px;
        left: 12px;
        background: rgba(0,0,0,0.7);
        color: white;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: bold;
        font-size: 14px;
    }

    .slide-status {
        position: absolute;
        top: 12px;
        right: 12px;
        padding: 4px 10px;
        border-radius: 20px;
        font-size: 11px;
        font-weight: 500;
        text-transform: uppercase;
    }

    .slide-status.active {
        background: #28a745;
        color: white;
    }

    .slide-status.inactive {
        background: #dc3545;
        color: white;
    }

    .slide-title {
        font-size: 16px;
        font-weight: 600;
        color: #333;
        margin: 0 0 8px 0;
        line-height: 1.3;
    }

    .slide-subtitle {
        font-size: 13px;
        color: #666;
        margin: 0;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .slide-meta {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-top: 12px;
        padding-top: 12px;
        border-top: 1px solid #eee;
    }

    .slide-buttons {
        font-size: 12px;
        color: #888;
    }

    .slide-edit {
        font-size: 12px;
        color: #667eea;
        text-decoration: none;
    }

    .slide-edit:hover {
        text-decoration: underline;
    }

    .drag-handle {
        position: absolute;
        top: 50%;
        right: -40px;
        transform: translateY(-50%);
        background: #667eea;
        color: white;
        width: 32px;
        height: 32px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition: opacity 0.2s;
    }

    .slide-card:hover .drag-handle {
        opacity: 1;
    }

    .info-banner {
        background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
        border: 1px solid #90caf9;
        border-radius: 8px;
        padding: 16px 20px;
        margin-bottom: 24px;
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .info-banner svg {
        flex-shrink: 0;
        color: #1976d2;
    }

    .info-banner p {
        margin: 0;
        color: #1565c0;
        font-size: 14px;
    }

    .save-notification {
        position: fixed;
        bottom: 30px;
        right: 30px;
        padding: 16px 24px;
        border-radius: 8px;
        font-size: 14px;
        font-weight: 500;
        z-index: 9999;
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.3s, transform 0.3s;
        box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    }

    .save-notification.show {
        opacity: 1;
        transform: translateY(0);
    }

    .save-notification.success {
        background: #28a745;
        color: white;
    }

    .save-notification.error {
        background: #dc3545;
        color: white;
    }

    .empty-state {
        text-align: center;
        padding: 60px 20px;
        color: #666;
    }

    .empty-state svg {
        width: 80px;
        height: 80px;
        color: #ccc;
        margin-bottom: 20px;
    }

    .empty-state h3 {
        margin: 0 0 10px 0;
        color: #333;
    }

    @media (max-width: 768px) {
        .slides-grid {
            grid-template-columns: 1fr;
        }

        .visual-reorder-header {
            flex-direction: column;
            align-items: flex-start;
        }
    }
</style>
{% endblock %}

{% block content %}
<div class="visual-reorder-container">
    <div class="visual-reorder-header">
        <h1>
            <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" style="vertical-align: middle; margin-right: 8px;">
                <rect x="3" y="3" width="7" height="7"></rect>
                <rect x="14" y="3" width="7" height="7"></rect>
                <rect x="14" y="14" width="7" height="7"></rect>
                <rect x="3" y="14" width="7" height="7"></rect>
            </svg>
            Reordonner les slides du carousel
        </h1>
        <div class="header-actions">
            <a href="../" class="btn-back">
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M19 12H5M12 19l-7-7 7-7"/>
                </svg>
                Retour a la liste
            </a>
            <button type="button" class="btn-save" id="saveOrder" disabled>
                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                    <path d="M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2z"/>
                    <polyline points="17 21 17 13 7 13 7 21"/>
                    <polyline points="7 3 7 8 15 8"/>
                </svg>
                Sauvegarder l'ordre
            </button>
        </div>
    </div>

    <div class="info-banner">
        <svg width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
            <circle cx="12" cy="12" r="10"/>
            <path d="M12 16v-4M12 8h.01"/>
        </svg>
        <p>Glissez et deposez les slides pour modifier leur ordre d'affichage sur la page d'accueil. Cliquez sur "Sauvegarder l'ordre" pour enregistrer vos modifications.</p>
    </div>

    {% if slides %}
    <div class="slides-grid" id="slidesGrid">
        {% for slide in slides %}
        <div class="slide-card" data-id="{{ slide.id }}">
            <span class="slide-order">{{ forloop.counter }}</span>
            <span class="slide-status {% if slide.is_active %}active{% else %}inactive{% endif %}">
                {% if slide.is_active %}Actif{% else %}Inactif{% endif %}
            </span>
            {% if slide.image %}
            <img src="{{ slide.image.url }}" alt="{{ slide.title }}" class="slide-image">
            {% else %}
            <div class="slide-image-placeholder">Pas d'image</div>
            {% endif %}
            <div class="slide-content">
                <h3 class="slide-title">{{ slide.title }}</h3>
                {% if slide.subtitle %}
                <p class="slide-subtitle">{{ slide.subtitle }}</p>
                {% endif %}
                <div class="slide-meta">
                    <span class="slide-buttons">
                        {{ slide.get_active_buttons|length }} bouton(s)
                    </span>
                    <a href="../{{ slide.id }}/change/" class="slide-edit">Modifier</a>
                </div>
            </div>
        </div>
        {% endfor %}
    </div>
    {% else %}
    <div class="empty-state">
        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
            <rect x="2" y="2" width="20" height="20" rx="2"/>
            <path d="M7 2v20M17 2v20M2 12h20M2 7h5M2 17h5M17 17h5M17 7h5"/>
        </svg>
        <h3>Aucun slide</h3>
        <p>Commencez par ajouter des slides au carousel.</p>
        <a href="../add/" class="btn-save" style="margin-top: 20px;">Ajouter un slide</a>
    </div>
    {% endif %}
</div>

<div class="save-notification" id="notification"></div>

<script>
document.addEventListener('DOMContentLoaded', function() {
    const grid = document.getElementById('slidesGrid');
    const saveBtn = document.getElementById('saveOrder');
    const notification = document.getElementById('notification');
    let hasChanges = false;

    if (!grid) return;

    // Initialize SortableJS
    const sortable = new Sortable(grid, {
        animation: 150,
        ghostClass: 'sortable-ghost',
        chosenClass: 'sortable-chosen',
        dragClass: 'sortable-drag',
        onEnd: function(evt) {
            hasChanges = true;
            saveBtn.disabled = false;
            updateOrderNumbers();
        }
    });

    // Update order numbers after drag
    function updateOrderNumbers() {
        const cards = grid.querySelectorAll('.slide-card');
        cards.forEach((card, index) => {
            const orderSpan = card.querySelector('.slide-order');
            if (orderSpan) {
                orderSpan.textContent = index + 1;
            }
        });
    }

    // Save order
    saveBtn.addEventListener('click', function() {
        const cards = grid.querySelectorAll('.slide-card');
        const order = [];

        cards.forEach((card, index) => {
            order.push({
                id: parseInt(card.dataset.id),
                order: index + 1
            });
        });

        saveBtn.disabled = true;
        saveBtn.innerHTML = '<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" class="spin"><circle cx="12" cy="12" r="10"/><path d="M12 6v6l4 2"/></svg> Sauvegarde...';

        fetch('../reorder/', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'X-CSRFToken': getCookie('csrftoken'),
                'X-Requested-With': 'XMLHttpRequest'
            },
            body: JSON.stringify({ order: order })
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                showNotification('Ordre sauvegarde avec succes!', 'success');
                hasChanges = false;
            } else {
                showNotification('Erreur: ' + (data.error || 'Erreur inconnue'), 'error');
                saveBtn.disabled = false;
            }
            saveBtn.innerHTML = '<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2z"/><polyline points="17 21 17 13 7 13 7 21"/><polyline points="7 3 7 8 15 8"/></svg> Sauvegarder l\'ordre';
        })
        .catch(error => {
            console.error('Erreur:', error);
            showNotification('Erreur de sauvegarde', 'error');
            saveBtn.disabled = false;
            saveBtn.innerHTML = '<svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2"><path d="M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2z"/><polyline points="17 21 17 13 7 13 7 21"/><polyline points="7 3 7 8 15 8"/></svg> Sauvegarder l\'ordre';
        });
    });

    // Show notification
    function showNotification(message, type) {
        notification.textContent = message;
        notification.className = 'save-notification ' + type + ' show';

        setTimeout(() => {
            notification.classList.remove('show');
        }, 3000);
    }

    // Get CSRF cookie
    function getCookie(name) {
        let cookieValue = null;
        if (document.cookie && document.cookie !== '') {
            const cookies = document.cookie.split(';');
            for (let i = 0; i < cookies.length; i++) {
                const cookie = cookies[i].trim();
                if (cookie.substring(0, name.length + 1) === (name + '=')) {
                    cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                    break;
                }
            }
        }
        return cookieValue;
    }

    // Warn before leaving with unsaved changes
    window.addEventListener('beforeunload', function(e) {
        if (hasChanges) {
            e.preventDefault();
            e.returnValue = '';
        }
    });
});
</script>

<style>
    @keyframes spin {
        from { transform: rotate(0deg); }
        to { transform: rotate(360deg); }
    }
    .spin {
        animation: spin 1s linear infinite;
    }
</style>
{% endblock %}