@extends('admin.layout')

@section('content')
<div class="ad-container">
    <div class="ad-header" style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px;">
        <div>
            <h2 style="font-size: 20px; font-weight: 800; color: var(--text); margin-bottom: 4px;">Quản lý Banner</h2>
            <p style="font-size: 13px; color: var(--text-muted);">Cấu hình các hình ảnh banner quảng cáo (Kéo thả để sắp xếp thứ tự hiển thị).</p>
        </div>
        <button onclick="openAddModal()" class="btn btn-primary" style="padding: 10px 20px; border-radius: 12px; font-weight: 700; display: flex; align-items: center; gap: 8px;">
            <i class="fas fa-plus"></i> Thêm banner mới
        </button>
    </div>

    @if(session('success'))
        <div style="background: #f0fdf4; border: 1px solid #bbf7d0; color: #166534; padding: 12px 16px; border-radius: 12px; margin-bottom: 20px; font-size: 14px; display: flex; align-items: center; gap: 8px;">
            <i class="fas fa-check-circle"></i> {{ session('success') }}
        </div>
    @endif

    @if(session('error'))
        <div style="background: #fef2f2; border: 1px solid #fecdd3; color: #991b1b; padding: 12px 16px; border-radius: 12px; margin-bottom: 20px; font-size: 14px; display: flex; align-items: center; gap: 8px;">
            <i class="fas fa-exclamation-circle"></i> {{ session('error') }}
        </div>
    @endif

    <div class="card">
        <div style="overflow-x: auto;">
            <table class="ad-table">
                <thead>
                    <tr>
                        <th style="width: 40px; text-align: center;"></th>
                        <th style="width: 60px; text-align: center;">Thứ tự</th>
                        <th style="width: 200px;">Hình ảnh</th>
                        <th>Mô tả (Alt)</th>
                        <th>Liên kết</th>
                        <th>Trạng thái</th>
                        <th style="width: 120px; text-align: right;">Thao tác</th>
                    </tr>
                </thead>
                <tbody id="sortableBanners">
                    @foreach($banners as $banner)
                    <tr data-id="{{ $banner->id }}">
                        <td style="text-align: center; cursor: grab;" class="drag-handle">
                            <i class="fas fa-grip-vertical" style="color: var(--text-muted); opacity: 0.5;"></i>
                        </td>
                        <td style="text-align: center;">
                            <div class="banner-order" style="width: 28px; height: 28px; background: var(--accent-light); color: var(--accent); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 12px; margin: 0 auto;">
                                {{ $banner->order }}
                            </div>
                        </td>
                        <td>
                            <div style="position: relative; width: 160px; aspect-ratio: 16/9; background: var(--bg); border-radius: 8px; overflow: hidden; border: 1px solid var(--border);">
                                <img src="{{ asset($banner->image_path) }}" style="width: 100%; height: 100%; object-fit: cover;">
                            </div>
                        </td>
                        <td style="font-weight: 700; color: var(--text);">{{ $banner->alt_text ?? 'Không có' }}</td>
                        <td>
                            @if($banner->link_url)
                                <a href="{{ $banner->link_url }}" target="_blank" style="color: var(--accent-dark); font-size: 13px; font-weight: 600; text-decoration: none;">
                                    <i class="fas fa-link"></i> {{ Str::limit($banner->link_url, 30) }}
                                </a>
                            @else
                                <span style="color: var(--text-muted); font-size: 12px;">Không có</span>
                            @endif
                        </td>
                        <td>
                            @if($banner->is_active)
                                <span style="padding: 4px 10px; background: #f0fdf4; color: #166534; border-radius: 20px; font-size: 10px; font-weight: 800;">HOẠT ĐỘNG</span>
                            @else
                                <span style="padding: 4px 10px; background: #fef2f2; color: #991b1b; border-radius: 20px; font-size: 10px; font-weight: 800;">ẨN</span>
                            @endif
                        </td>
                        <td style="text-align: right;">
                            <div style="display: flex; gap: 8px; justify-content: flex-end;">
                                <button onclick='editBanner(@json($banner))' class="btn btn-outline" style="width: 34px; height: 34px; padding: 0; display: flex; align-items: center; justify-content: center; border-radius: 8px;">
                                    <i class="fas fa-pen" style="font-size: 12px;"></i>
                                </button>
                                <form action="{{ route('admin.banners.delete', $banner->id) }}" method="POST" onsubmit="return confirm('Xóa banner này?')">
                                    @csrf @method('DELETE')
                                    <button type="submit" class="btn btn-danger" style="width: 34px; height: 34px; padding: 0; display: flex; align-items: center; justify-content: center; border-radius: 8px; background: #fff1f2; border: 1px solid #fecdd3; color: #e11d48;">
                                        <i class="fas fa-trash-alt" style="font-size: 12px;"></i>
                                    </button>
                                </form>
                            </div>
                        </td>
                    </tr>
                    @endforeach
                </tbody>
            </table>
        </div>
    </div>
</div>

{{-- Modal Add/Edit --}}
<div id="bannerModal" style="display:none; position:fixed; inset:0; z-index:9999; align-items:center; justify-content:center; background:rgba(0,0,0,0.5); backdrop-filter:blur(4px); padding: 20px;">
    <div class="card" style="width: 100%; max-width: 550px; max-height: 90vh; overflow-y: auto; border-radius: 16px;">
        <div class="card-header" style="display: flex; justify-content: space-between; align-items: center; padding: 18px 24px; border-bottom: 1px solid var(--border);">
            <h3 id="modalTitle" style="font-size: 16px; color: var(--text); font-weight: 800; margin: 0;">Thêm banner mới</h3>
            <button onclick="closeModal()" style="background:none; border:none; color: var(--text-muted); cursor:pointer; font-size: 20px;"><i class="fas fa-times"></i></button>
        </div>
        <div style="padding: 24px;">
            <form id="bannerForm" method="POST" enctype="multipart/form-data">
                @csrf
                <div id="methodField"></div>
                
                <div style="margin-bottom: 16px;">
                    <label style="display:block;font-size:11px;font-weight:700;color:var(--text-muted);text-transform:uppercase;margin-bottom:6px;">Hình ảnh banner</label>
                    <input type="file" name="image" id="f_image" class="ad-input" style="padding: 8px 12px;">
                    <div id="imagePreviewContainer" style="display: none; margin-top: 10px;">
                        <span style="font-size: 11px; color: var(--text-muted); display: block; margin-bottom: 4px;">Xem trước ảnh hiện tại:</span>
                        <img id="imagePreview" src="" style="width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 8px; border: 1px solid var(--border);">
                    </div>
                </div>

                <div style="margin-bottom: 16px;">
                    <label style="display:block;font-size:11px;font-weight:700;color:var(--text-muted);text-transform:uppercase;margin-bottom:6px;">Mô tả (Alt Text)</label>
                    <input type="text" name="alt_text" id="f_alt_text" class="ad-input" placeholder="Nhập mô tả ảnh hoặc tiêu đề..." required>
                </div>

                <div style="display: grid; grid-template-columns: 2fr 1fr; gap: 16px; margin-bottom: 16px;">
                    <div>
                        <label style="display:block;font-size:11px;font-weight:700;color:var(--text-muted);text-transform:uppercase;margin-bottom:6px;">Liên kết click (Link URL)</label>
                        <input type="text" name="link_url" id="f_link_url" class="ad-input" placeholder="https://...">
                    </div>
                    <div>
                        <label style="display:block;font-size:11px;font-weight:700;color:var(--text-muted);text-transform:uppercase;margin-bottom:6px;">Thứ tự hiển thị</label>
                        <input type="number" name="order" id="f_order" class="ad-input" value="0">
                    </div>
                </div>

                <div style="margin-bottom: 24px; padding: 12px; background: var(--bg); border-radius: 12px;">
                    <label style="display:flex; align-items:center; gap:8px; cursor:pointer;">
                        <input type="checkbox" name="is_active" id="f_is_active" checked>
                        <span style="font-size:13px; font-weight:700;">Hiển thị banner này</span>
                    </label>
                </div>

                <div style="display: flex; gap: 12px; justify-content: flex-end; margin-top: 32px; border-top: 1px solid var(--border); padding-top: 20px;">
                    <button type="button" onclick="closeModal()" class="btn btn-outline" style="padding: 10px 24px;">Hủy bỏ</button>
                    <button type="submit" class="btn btn-primary" style="padding: 10px 32px; font-weight: 800;">LƯU THAY ĐỔI</button>
                </div>
            </form>
        </div>
    </div>
</div>

<style>
    .sortable-ghost {
        opacity: 0.3;
        background: var(--accent-light) !important;
    }
</style>

<script src="https://cdn.jsdelivr.net/npm/sortablejs@1.15.2/Sortable.min.js"></script>
<script>
    function openAddModal() {
        document.getElementById('modalTitle').textContent = 'Thêm banner mới';
        document.getElementById('bannerForm').action = "{{ route('admin.banners.store') }}";
        document.getElementById('methodField').innerHTML = '';
        document.getElementById('bannerForm').reset();
        document.getElementById('f_image').required = true;
        document.getElementById('imagePreviewContainer').style.display = 'none';
        document.getElementById('bannerModal').style.display = 'flex';
    }

    function editBanner(banner) {
        document.getElementById('modalTitle').textContent = 'Chỉnh sửa banner #' + banner.id;
        document.getElementById('bannerForm').action = "/admin/banners/" + banner.id;
        document.getElementById('methodField').innerHTML = '@method("PUT")';
        
        document.getElementById('f_alt_text').value = banner.alt_text || '';
        document.getElementById('f_link_url').value = banner.link_url || '';
        document.getElementById('f_order').value = banner.order || 0;
        document.getElementById('f_is_active').checked = !!banner.is_active;
        document.getElementById('f_image').required = false;

        if (banner.image_path) {
            document.getElementById('imagePreview').src = "{{ asset('') }}" + banner.image_path;
            document.getElementById('imagePreviewContainer').style.display = 'block';
        } else {
            document.getElementById('imagePreviewContainer').style.display = 'none';
        }

        document.getElementById('bannerModal').style.display = 'flex';
    }

    function closeModal() {
        document.getElementById('bannerModal').style.display = 'none';
    }

    // Initialize Sortable
    const el = document.getElementById('sortableBanners');
    new Sortable(el, {
        handle: '.drag-handle',
        animation: 150,
        ghostClass: 'sortable-ghost',
        onEnd: function() {
            const orders = [];
            document.querySelectorAll('#sortableBanners tr').forEach((tr, index) => {
                orders.push(tr.dataset.id);
                // Update visual order badge
                tr.querySelector('.banner-order').textContent = index + 1;
            });

            // Send to server
            fetch('{{ route("admin.banners.reorder") }}', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-CSRF-TOKEN': '{{ csrf_token() }}'
                },
                body: JSON.stringify({ orders: orders })
            })
            .then(response => response.json())
            .then(data => {
                if (data.success) {
                    console.log('Banner order saved successfully');
                }
            });
        }
    });
</script>
@endsection