{# Article photo gallery — shown on detail page #}
{% set article = entity.instance %}
{% set articleId = article.id.toRfc4122() %}
{% set photos = article.photos|sort((a, b) => a.sortOrder <=> b.sortOrder) %}

<style>
.photo-gallery { margin-top: .5rem; }
.photo-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
    min-height: 80px;
}
.photo-card {
    position: relative;
    width: 160px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    overflow: hidden;
    background: #f8f9fa;
    cursor: grab;
    transition: box-shadow .15s;
}
.photo-card:active { cursor: grabbing; }
.photo-card.is-main { border-color: #0d6efd; }
.photo-card.sortable-ghost { opacity: .4; }
.photo-card img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}
.photo-card-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 6px;
    background: rgba(0,0,0,.04);
}
.photo-main-badge {
    font-size: .65rem;
    font-weight: 700;
    color: #0d6efd;
    text-transform: uppercase;
    letter-spacing: .04em;
}
.photo-card-actions .btn { padding: 2px 6px; font-size: .75rem; }
.upload-zone {
    border: 2px dashed #adb5bd;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    color: #6c757d;
    cursor: pointer;
    margin-bottom: 16px;
    transition: border-color .2s, background .2s;
}
.upload-zone.drag-over {
    border-color: #0d6efd;
    background: #e8f0fe;
}
.upload-zone input[type=file] { display: none; }
</style>

<div class="photo-gallery" id="photo-gallery-{{ articleId }}">
    {# Upload zone #}
    <div class="upload-zone" id="upload-zone-{{ articleId }}">
        <input type="file" id="photo-file-input-{{ articleId }}"
               accept="image/jpeg,image/png,image/webp" multiple>
        <i class="fa fa-cloud-upload-alt fa-lg mb-2 d-block"></i>
        <span>Fotos hier ablegen oder <strong>klicken zum Hochladen</strong></span>
        <div id="upload-status-{{ articleId }}" class="mt-2 small"></div>
    </div>

    {# Photo grid #}
    <div class="photo-grid" id="photo-grid-{{ articleId }}">
        {% for photo in photos %}
        <div class="photo-card {% if photo.isMain %}is-main{% endif %}"
             data-photo-id="{{ photo.id.toRfc4122() }}">
            <img src="{{ path('admin_photo_serve', {filename: photo.filename}) }}"
                 alt="Photo">
            <div class="photo-card-actions">
                <span class="photo-main-badge">{% if photo.isMain %}⭐ Main{% endif %}</span>
                <div class="d-flex gap-1">
                    {% if not photo.isMain %}
                    <button class="btn btn-sm btn-outline-primary photo-btn-main"
                            title="Als Hauptbild setzen">★</button>
                    {% endif %}
                    <button class="btn btn-sm btn-outline-danger photo-btn-delete"
                            title="Löschen">×</button>
                </div>
            </div>
        </div>
        {% endfor %}
    </div>
</div>

<script src="https://cdn.jsdelivr.net/npm/sortablejs@1.15.0/Sortable.min.js"></script>
<script>
(function () {
    const articleId = {{ articleId|json_encode|raw }};
    const grid      = document.getElementById('photo-grid-' + articleId);
    const zone      = document.getElementById('upload-zone-' + articleId);
    const fileInput = document.getElementById('photo-file-input-' + articleId);
    const status    = document.getElementById('upload-status-' + articleId);

    /* ---------- drag-and-drop reorder ---------- */
    Sortable.create(grid, {
        animation: 150,
        ghostClass: 'sortable-ghost',
        onEnd() {
            const order = [...grid.querySelectorAll('.photo-card')]
                .map(el => el.dataset.photoId);
            fetch('/api/articles/' + articleId + '/photos/sort', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ order }),
            });
        },
    });

    /* ---------- upload ---------- */
    zone.addEventListener('click', () => fileInput.click());
    zone.addEventListener('dragover', e => { e.preventDefault(); zone.classList.add('drag-over'); });
    zone.addEventListener('dragleave', () => zone.classList.remove('drag-over'));
    zone.addEventListener('drop', e => {
        e.preventDefault();
        zone.classList.remove('drag-over');
        uploadFiles(e.dataTransfer.files);
    });
    fileInput.addEventListener('change', () => uploadFiles(fileInput.files));

    async function uploadFiles(files) {
        for (const file of files) {
            status.textContent = 'Lade hoch: ' + file.name + '…';
            const fd = new FormData();
            fd.append('photo', file);
            const res = await fetch('/api/articles/' + articleId + '/photos', {
                method: 'POST',
                body: fd,
            });
            if (res.ok) {
                const data = await res.json();
                appendPhotoCard(data.id, '/admin/photos/' + encodeURIComponent(file.name.replace(/^.*[\\/]/, '')), data.isMain, file);
                status.textContent = '';
            } else {
                status.textContent = 'Fehler beim Hochladen von ' + file.name;
            }
        }
        fileInput.value = '';
    }

    function appendPhotoCard(photoId, imgSrc, isMain, file) {
        const card = document.createElement('div');
        card.className = 'photo-card' + (isMain ? ' is-main' : '');
        card.dataset.photoId = photoId;

        const img = document.createElement('img');
        img.src = URL.createObjectURL(file);
        img.alt = 'Photo';
        card.appendChild(img);

        const actions = document.createElement('div');
        actions.className = 'photo-card-actions';
        actions.innerHTML = '<span class="photo-main-badge">' + (isMain ? '⭐ Main' : '') + '</span>'
            + '<div class="d-flex gap-1">'
            + (isMain ? '' : '<button class="btn btn-sm btn-outline-primary photo-btn-main" title="Als Hauptbild setzen">★</button>')
            + '<button class="btn btn-sm btn-outline-danger photo-btn-delete" title="Löschen">×</button>'
            + '</div>';
        card.appendChild(actions);
        grid.appendChild(card);
        wireCard(card);
    }

    /* ---------- set main / delete ---------- */
    function wireCard(card) {
        const btnMain = card.querySelector('.photo-btn-main');
        const btnDel  = card.querySelector('.photo-btn-delete');

        btnMain?.addEventListener('click', async () => {
            await fetch('/api/articles/' + articleId + '/photos/' + card.dataset.photoId + '/main', {
                method: 'PATCH',
            });
            // update badges
            grid.querySelectorAll('.photo-card').forEach(c => {
                c.classList.remove('is-main');
                c.querySelector('.photo-main-badge').textContent = '';
                const bm = c.querySelector('.photo-btn-main');
                if (!bm) {
                    const acts = c.querySelector('.photo-card-actions .d-flex');
                    acts.insertAdjacentHTML('afterbegin',
                        '<button class="btn btn-sm btn-outline-primary photo-btn-main" title="Als Hauptbild setzen">★</button>');
                    wireCard(c);
                }
            });
            card.classList.add('is-main');
            card.querySelector('.photo-main-badge').textContent = '⭐ Main';
            btnMain.remove();
        });

        btnDel?.addEventListener('click', async () => {
            if (!confirm('Foto löschen?')) return;
            const res = await fetch('/api/articles/' + articleId + '/photos/' + card.dataset.photoId, {
                method: 'DELETE',
            });
            if (res.ok) card.remove();
        });
    }

    grid.querySelectorAll('.photo-card').forEach(wireCard);
})();
</script>