{% extends "base.html" %}

{% block title %}{{ source.name }} - Drive Browser{% endblock %}

{% block styles %}
<style>
    /* Modern Drive Browser Styles */
    .browser-header {
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-radius: 12px;
        padding: 16px 20px;
        margin-bottom: 20px;
    }

    .breadcrumb {
        margin-bottom: 0;
        padding: 0;
        background: transparent;
    }

    .breadcrumb-item a {
        color: var(--accent-primary);
        text-decoration: none;
    }

    .breadcrumb-item a:hover {
        text-decoration: underline;
    }

    .breadcrumb-item.active {
        color: var(--text-primary);
    }

    .view-toggle .btn {
        padding: 8px 12px;
        border-radius: 8px;
    }

    .view-toggle .btn.active {
        background: var(--accent-primary);
        border-color: var(--accent-primary);
        color: white;
    }

    /* File Cards */
    .file-card {
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-radius: 12px;
        transition: all 0.2s ease;
        cursor: pointer;
        overflow: hidden;
    }

    .file-card:hover {
        transform: translateY(-4px);
        border-color: var(--accent-primary);
        box-shadow: 0 8px 20px rgba(13, 110, 253, 0.2);
    }

    .file-card .card-body {
        padding: 20px;
        text-align: center;
        position: relative;
    }

    .file-card .copy-btn {
        position: absolute;
        top: 8px;
        right: 8px;
        width: 28px;
        height: 28px;
        border-radius: 6px;
        background: rgba(255,255,255,0.1);
        border: none;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition: all 0.2s ease;
        z-index: 10;
    }

    .file-card:hover .copy-btn {
        opacity: 1;
    }

    .file-card .copy-btn:hover {
        background: var(--accent-primary);
        color: white;
        transform: scale(1.1);
    }

    .file-card .copy-btn.copied {
        background: #198754;
        color: white;
    }

    .file-icon {
        width: 64px;
        height: 64px;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 2rem;
        margin: 0 auto 12px;
    }

    .file-icon.folder {
        background: linear-gradient(135deg, rgba(255,193,7,0.2) 0%, rgba(255,152,0,0.2) 100%);
        color: #ffc107;
    }

    .file-icon.pdf {
        background: linear-gradient(135deg, rgba(220,53,69,0.2) 0%, rgba(255,87,34,0.2) 100%);
        color: #dc3545;
    }

    .file-icon.image {
        background: linear-gradient(135deg, rgba(13,202,240,0.2) 0%, rgba(32,201,151,0.2) 100%);
        color: #0dcaf0;
    }

    .file-icon.file {
        background: linear-gradient(135deg, rgba(108,117,125,0.2) 0%, rgba(73,80,87,0.2) 100%);
        color: #6c757d;
    }

    .file-icon.slides {
        background: linear-gradient(135deg, rgba(251,188,5,0.2) 0%, rgba(234,88,12,0.2) 100%);
        color: #f59e0b;
    }

    .file-icon.sheet {
        background: linear-gradient(135deg, rgba(34,197,94,0.2) 0%, rgba(22,163,74,0.2) 100%);
        color: #22c55e;
    }

    .file-icon.doc {
        background: linear-gradient(135deg, rgba(59,130,246,0.2) 0%, rgba(37,99,235,0.2) 100%);
        color: #3b82f6;
    }

    .file-icon.video {
        background: linear-gradient(135deg, rgba(168,85,247,0.2) 0%, rgba(139,92,246,0.2) 100%);
        color: #a855f7;
    }

    .file-name {
        font-size: 0.9rem;
        font-weight: 500;
        word-break: break-word;
        line-height: 1.3;
    }

    /* List View */
    .list-view {
        display: none;
    }

    .list-view.active {
        display: block;
    }

    .grid-view {
        display: flex;
    }

    .grid-view.hidden {
        display: none !important;
    }

    .file-row {
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-radius: 8px;
        margin-bottom: 8px;
        padding: 12px 16px;
        cursor: pointer;
        transition: all 0.2s ease;
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .file-row:hover {
        background: rgba(13, 110, 253, 0.1);
        border-color: var(--accent-primary);
    }

    .file-row .file-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        margin: 0;
        flex-shrink: 0;
    }

    .file-row .file-name {
        flex-grow: 1;
        text-align: left;
    }

    .file-row .copy-btn {
        width: 32px;
        height: 32px;
        border-radius: 6px;
        background: rgba(255,255,255,0.1);
        border: none;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.2s ease;
        flex-shrink: 0;
    }

    .file-row .copy-btn:hover {
        background: var(--accent-primary);
        color: white;
    }

    .file-row .copy-btn.copied {
        background: #198754;
        color: white;
    }

    /* Action buttons for files */
    .file-actions {
        display: flex;
        gap: 4px;
        flex-shrink: 0;
    }

    .action-btn-sm {
        width: 28px;
        height: 28px;
        border-radius: 6px;
        background: rgba(255,255,255,0.1);
        border: none;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.2s ease;
        font-size: 0.85rem;
    }

    .action-btn-sm:hover {
        background: var(--accent-primary);
        color: white;
    }

    .action-btn-sm.google-btn:hover {
        background: #4285f4;
    }

    /* Loading more indicator */
    .loading-more {
        display: none;
        text-align: center;
        padding: 20px;
        color: var(--text-muted);
    }

    .loading-more.active {
        display: block;
    }

    .loading-more .spinner-border {
        width: 1.5rem;
        height: 1.5rem;
    }

    /* Skeleton loader */
    .skeleton-card {
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-radius: 12px;
        padding: 20px;
        text-align: center;
    }

    .skeleton-icon {
        width: 64px;
        height: 64px;
        border-radius: 16px;
        background: linear-gradient(90deg, var(--bg-elevated) 25%, var(--bg-card) 50%, var(--bg-elevated) 75%);
        background-size: 200% 100%;
        animation: shimmer 1.5s infinite;
        margin: 0 auto 12px;
    }

    .skeleton-text {
        height: 14px;
        border-radius: 4px;
        background: linear-gradient(90deg, var(--bg-elevated) 25%, var(--bg-card) 50%, var(--bg-elevated) 75%);
        background-size: 200% 100%;
        animation: shimmer 1.5s infinite;
        width: 70%;
        margin: 0 auto;
    }

    @keyframes shimmer {
        0% { background-position: 200% 0; }
        100% { background-position: -200% 0; }
    }

    /* Empty State */
    .empty-state {
        text-align: center;
        padding: 80px 20px;
        color: var(--text-muted);
    }

    .empty-state i {
        font-size: 4rem;
        opacity: 0.3;
        margin-bottom: 16px;
    }

    /* Loader */
    .loader-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.8);
        z-index: 9999;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        color: white;
    }

    .loader-overlay.active {
        display: flex;
    }

    .selection-bar {
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-radius: 8px;
        padding: 8px 16px;
        margin-bottom: 16px;
    }
</style>
{% endblock %}

{% block content %}
<div class="container-fluid px-4 py-4">
    <!-- Header with Breadcrumb -->
    <div class="browser-header d-flex justify-content-between align-items-center flex-wrap gap-3">
        <nav aria-label="breadcrumb">
            <ol class="breadcrumb">
                <li class="breadcrumb-item"><a href="/drive_manager"><i class="bi bi-cloud me-1"></i>Drives</a></li>
                {% if is_api %}
                <li class="breadcrumb-item"><a href="/drive/api/browse/root?title=My Drive">My Drive</a></li>
                {% for crumb in breadcrumbs %}
                <li class="breadcrumb-item"><a href="/drive/api/browse/{{ crumb.id }}?title={{ crumb.name }}&breadcrumbs={{ crumb.trail | tojson | urlencode }}">{{ crumb.name }}</a></li>
                {% endfor %}
                {% if folder_id != 'root' and not breadcrumbs %}
                <li class="breadcrumb-item active">{{ source.name }}</li>
                {% endif %}
                {% else %}
                <li class="breadcrumb-item"><a href="/drive/browse/{{ source.id }}">{{ source.name }}</a></li>
                {% for crumb in breadcrumbs %}
                <li class="breadcrumb-item active">{{ crumb.name }}</li>
                {% endfor %}
                {% endif %}
            </ol>
        </nav>

        <div class="d-flex gap-2 align-items-center">
            <div class="btn-group view-toggle" role="group">
                <button type="button" class="btn btn-outline-secondary active" id="btn-grid" onclick="switchView('grid')">
                    <i class="bi bi-grid-3x3-gap-fill"></i>
                </button>
                <button type="button" class="btn btn-outline-secondary" id="btn-list" onclick="switchView('list')">
                    <i class="bi bi-list"></i>
                </button>
            </div>
        </div>
    </div>

    <!-- Selection Bar -->
    <div class="selection-bar d-flex align-items-center justify-content-between">
        <div class="d-flex align-items-center gap-3">
            <div class="form-check">
                <input class="form-check-input" type="checkbox" id="select-all">
                <label class="form-check-label small" for="select-all">Select All</label>
            </div>
            <span class="text-muted small"><span id="item-count">{{ items|length }}</span> items</span>
        </div>
        <div id="bulk-actions" style="display: none;">
            <span class="text-muted me-2 small"><span id="selected-count">0</span> selected</span>
        </div>
    </div>

    <!-- Grid View -->
    <div class="row row-cols-2 row-cols-sm-3 row-cols-md-4 row-cols-lg-5 row-cols-xl-6 g-3 grid-view" id="grid-view">
        {% for item in items %}
        {% if item.type == 'folder' %}
            {% set link = '/drive/api/browse/' + item.path if is_api else '/drive/browse/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'folder' %}
            {% set icon = 'bi-folder-fill' %}
            {% set google_link = '' %}
        {% elif item.type == 'pdf' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '/drive/api/download/' + item.path if is_api else '/drive/raw/' + source.id|string + '/' + item.path %}
            {% set icon_class = 'pdf' %}
            {% set icon = 'bi-file-earmark-pdf-fill' %}
            {% set google_link = '' %}
        {% elif item.type == 'image' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '/drive/api/download/' + item.path if is_api else '/drive/raw/' + source.id|string + '/' + item.path %}
            {% set icon_class = 'image' %}
            {% set icon = 'bi-file-earmark-image-fill' %}
            {% set google_link = '' %}
        {% elif item.type == 'slides' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'slides' %}
            {% set icon = 'bi-file-earmark-slides-fill' %}
            {% set google_link = 'https://docs.google.com/presentation/d/' + item.path + '/edit' if is_api else '' %}
        {% elif item.type == 'sheet' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'sheet' %}
            {% set icon = 'bi-file-earmark-spreadsheet-fill' %}
            {% set google_link = 'https://docs.google.com/spreadsheets/d/' + item.path + '/edit' if is_api else '' %}
        {% elif item.type == 'doc' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'doc' %}
            {% set icon = 'bi-file-earmark-word-fill' %}
            {% set google_link = 'https://docs.google.com/document/d/' + item.path + '/edit' if is_api else '' %}
        {% elif item.type == 'video' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'video' %}
            {% set icon = 'bi-file-earmark-play-fill' %}
            {% set google_link = '' %}
        {% else %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '/drive/api/download/' + item.path if is_api else '/drive/raw/' + source.id|string + '/' + item.path %}
            {% set icon_class = 'file' %}
            {% set icon = 'bi-file-earmark-fill' %}
            {% set google_link = '' %}
        {% endif %}

        <div class="col">
            <div class="file-card" onclick="navigate('{{ link }}')" data-file-type="{{ item.type }}">
                <div class="card-body">
                    {% if item.type != 'folder' %}
                    <div class="file-actions" style="position: absolute; top: 8px; right: 8px; opacity: 0; transition: opacity 0.2s;">
                        {% if raw_link %}
                        <button class="action-btn-sm" onclick="event.stopPropagation(); copyFileLink('{{ raw_link }}', this)" title="Copy download link">
                            <i class="bi bi-link-45deg"></i>
                        </button>
                        {% endif %}
                        {% if google_link %}
                        <a href="{{ google_link }}" target="_blank" class="action-btn-sm google-btn" onclick="event.stopPropagation()" title="Open in Google">
                            <i class="bi bi-google"></i>
                        </a>
                        {% endif %}
                    </div>
                    {% endif %}
                    <div class="file-icon {{ icon_class }}">
                        <i class="bi {{ icon }}"></i>
                    </div>
                    <div class="file-name text-truncate" title="{{ item.name }}">{{ item.name }}</div>
                </div>
            </div>
        </div>
        {% else %}
        <div class="col-12">
            <div class="empty-state">
                <i class="bi bi-folder2-open d-block"></i>
                <h5>Empty Folder</h5>
                <p class="text-muted">This folder is empty or not synced yet</p>
                <a href="/drive_manager" class="btn btn-outline-primary">
                    <i class="bi bi-arrow-left me-1"></i>Back to Drive Manager
                </a>
            </div>
        </div>
        {% endfor %}
    </div>

    <!-- List View -->
    <div class="list-view" id="list-view">
        {% for item in items %}
        {% if item.type == 'folder' %}
            {% set link = '/drive/api/browse/' + item.path if is_api else '/drive/browse/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'folder' %}
            {% set icon = 'bi-folder-fill' %}
            {% set google_link = '' %}
        {% elif item.type == 'pdf' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '/drive/api/download/' + item.path if is_api else '/drive/raw/' + source.id|string + '/' + item.path %}
            {% set icon_class = 'pdf' %}
            {% set icon = 'bi-file-earmark-pdf-fill' %}
            {% set google_link = '' %}
        {% elif item.type == 'image' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '/drive/api/download/' + item.path if is_api else '/drive/raw/' + source.id|string + '/' + item.path %}
            {% set icon_class = 'image' %}
            {% set icon = 'bi-file-earmark-image-fill' %}
            {% set google_link = '' %}
        {% elif item.type == 'slides' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'slides' %}
            {% set icon = 'bi-file-earmark-slides-fill' %}
            {% set google_link = 'https://docs.google.com/presentation/d/' + item.path + '/edit' if is_api else '' %}
        {% elif item.type == 'sheet' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'sheet' %}
            {% set icon = 'bi-file-earmark-spreadsheet-fill' %}
            {% set google_link = 'https://docs.google.com/spreadsheets/d/' + item.path + '/edit' if is_api else '' %}
        {% elif item.type == 'doc' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'doc' %}
            {% set icon = 'bi-file-earmark-word-fill' %}
            {% set google_link = 'https://docs.google.com/document/d/' + item.path + '/edit' if is_api else '' %}
        {% elif item.type == 'video' %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '' %}
            {% set icon_class = 'video' %}
            {% set icon = 'bi-file-earmark-play-fill' %}
            {% set google_link = '' %}
        {% else %}
            {% set link = '/drive/api/open/' + item.path if is_api else '/drive/file/' + source.id|string + '/' + item.path %}
            {% set raw_link = '/drive/api/download/' + item.path if is_api else '/drive/raw/' + source.id|string + '/' + item.path %}
            {% set icon_class = 'file' %}
            {% set icon = 'bi-file-earmark-fill' %}
            {% set google_link = '' %}
        {% endif %}

        <div class="file-row" onclick="navigate('{{ link }}')">
            <div class="file-icon {{ icon_class }}">
                <i class="bi {{ icon }}"></i>
            </div>
            <div class="file-name">{{ item.name }}</div>
            <span class="badge bg-secondary">{{ item.type }}</span>
            {% if item.type != 'folder' %}
            <div class="file-actions">
                {% if raw_link %}
                <button class="action-btn-sm" onclick="event.stopPropagation(); copyFileLink('{{ raw_link }}', this)" title="Copy download link">
                    <i class="bi bi-link-45deg"></i>
                </button>
                {% endif %}
                {% if google_link %}
                <a href="{{ google_link }}" target="_blank" class="action-btn-sm google-btn" onclick="event.stopPropagation()" title="Open in Google">
                    <i class="bi bi-google"></i>
                </a>
                {% endif %}
            </div>
            {% endif %}
        </div>
        {% endfor %}
    </div>
</div>

<!-- Loading More Indicator -->
<div class="loading-more" id="loadingMore">
    <div class="spinner-border text-primary" role="status"></div>
    <div class="mt-2">Loading more files...</div>
</div>

<!-- Loader Overlay -->
<div class="loader-overlay" id="loader">
    <div class="spinner-border text-primary mb-3" style="width: 3rem; height: 3rem;"></div>
    <div class="fs-5">Opening file...</div>
</div>

<!-- Toast -->
<div class="position-fixed bottom-0 end-0 p-3" style="z-index: 1100">
    <div class="toast align-items-center text-bg-success border-0" id="copyToast" role="alert">
        <div class="d-flex">
            <div class="toast-body">
                <i class="bi bi-check-circle me-2"></i>Link copied!
            </div>
            <button type="button" class="btn-close btn-close-white me-2 m-auto" data-bs-dismiss="toast"></button>
        </div>
    </div>
</div>
{% endblock %}

{% block scripts %}
<script>
    // Configuration
    const CONFIG = {
        isApi: {{ 'true' if is_api else 'false' }},
        isLocal: {{ 'true' if is_local is defined and is_local else 'false' }},
        lazyLoad: {{ 'true' if lazy_load is defined and lazy_load else 'false' }},
        sourceId: '{{ source.id }}',
        folderId: '{{ folder_id if folder_id is defined else "" }}',
        sourceName: '{{ source.name }}',
        subpath: '{{ current_subpath if current_subpath is defined else "" }}',
        breadcrumbs: {{ breadcrumbs | tojson }}
    };

    // Lazy loading state
    const lazyState = {
        nextToken: null,
        offset: 0,
        loading: false,
        hasMore: true,
        itemCount: 0
    };

    // Build folder URL with breadcrumb tracking for API
    function buildFolderUrl(folderId, folderName) {
        if (CONFIG.isApi) {
            // Build new breadcrumb trail
            const newTrail = [...CONFIG.breadcrumbs, { id: CONFIG.folderId, name: CONFIG.sourceName }];
            const breadcrumbsParam = encodeURIComponent(JSON.stringify(newTrail));
            return `/drive/api/browse/${folderId}?title=${encodeURIComponent(folderName)}&breadcrumbs=${breadcrumbsParam}`;
        }
        return `/drive/browse/${CONFIG.sourceId}/${folderId}`;
    }

    // Navigation with loader
    function navigate(url) {
        document.getElementById('loader').classList.add('active');
        window.location.href = url;
    }

    // Hide loader on back navigation
    window.addEventListener('pageshow', () => {
        document.getElementById('loader').classList.remove('active');
    });

    // View switching
    function switchView(view) {
        const gridView = document.getElementById('grid-view');
        const listView = document.getElementById('list-view');
        const btnGrid = document.getElementById('btn-grid');
        const btnList = document.getElementById('btn-list');

        if (view === 'list') {
            gridView.classList.add('hidden');
            listView.classList.add('active');
            btnList.classList.add('active');
            btnGrid.classList.remove('active');
        } else {
            gridView.classList.remove('hidden');
            listView.classList.remove('active');
            btnGrid.classList.add('active');
            btnList.classList.remove('active');
        }

        localStorage.setItem('driveViewMode', view);
    }

    // Copy file link - for API files, get public token first
    async function copyFileLink(path, btn) {
        let urlToCopy = window.location.origin + path;

        // For API files, get the public token URL
        if (CONFIG.isApi && path.includes('/drive/api/download/')) {
            const fileId = path.split('/drive/api/download/')[1];
            try {
                const response = await fetch(`/drive/api/token/${fileId}`);
                if (response.ok) {
                    const data = await response.json();
                    urlToCopy = data.public_url;
                }
            } catch (e) {
                console.error('Failed to get public token:', e);
            }
        }

        navigator.clipboard.writeText(urlToCopy).then(() => {
            const originalHtml = btn.innerHTML;
            btn.innerHTML = '<i class="bi bi-check"></i>';
            btn.style.background = '#198754';
            btn.style.color = 'white';

            const toast = document.getElementById('copyToast');
            new bootstrap.Toast(toast).show();

            setTimeout(() => {
                btn.innerHTML = originalHtml;
                btn.style.background = '';
                btn.style.color = '';
            }, 2000);
        });
    }

    // Create file card HTML
    function createFileCard(item) {
        const typeConfig = {
            folder: { icon: 'bi-folder-fill', class: 'folder' },
            pdf: { icon: 'bi-file-earmark-pdf-fill', class: 'pdf' },
            image: { icon: 'bi-file-earmark-image-fill', class: 'image' },
            slides: { icon: 'bi-file-earmark-slides-fill', class: 'slides' },
            sheet: { icon: 'bi-file-earmark-spreadsheet-fill', class: 'sheet' },
            doc: { icon: 'bi-file-earmark-word-fill', class: 'doc' },
            video: { icon: 'bi-file-earmark-play-fill', class: 'video' },
            file: { icon: 'bi-file-earmark-fill', class: 'file' }
        };

        const cfg = typeConfig[item.type] || typeConfig.file;
        let link, rawLink = '', googleLink = '';

        if (CONFIG.isApi) {
            link = item.type === 'folder'
                ? buildFolderUrl(item.path, item.name)
                : `/drive/api/open/${item.path}`;

            // For API files, use download endpoint for copy link
            if (item.type !== 'folder' && !['slides', 'sheet', 'doc', 'video'].includes(item.type)) {
                rawLink = `/drive/api/download/${item.path}`;
            }

            if (item.type === 'slides') googleLink = `https://docs.google.com/presentation/d/${item.path}/edit`;
            else if (item.type === 'sheet') googleLink = `https://docs.google.com/spreadsheets/d/${item.path}/edit`;
            else if (item.type === 'doc') googleLink = `https://docs.google.com/document/d/${item.path}/edit`;
        } else {
            link = item.type === 'folder'
                ? `/drive/browse/${CONFIG.sourceId}/${item.path}`
                : `/drive/file/${CONFIG.sourceId}/${item.path}`;

            if (item.type !== 'folder' && !['slides', 'sheet', 'doc', 'video'].includes(item.type)) {
                rawLink = `/drive/raw/${CONFIG.sourceId}/${item.path}`;
            }
        }

        let actionsHtml = '';
        if (item.type !== 'folder') {
            actionsHtml = '<div class="file-actions" style="position: absolute; top: 8px; right: 8px; opacity: 0; transition: opacity 0.2s;">';
            if (rawLink) {
                actionsHtml += `<button class="action-btn-sm" onclick="event.stopPropagation(); copyFileLink('${rawLink}', this)" title="Copy download link"><i class="bi bi-link-45deg"></i></button>`;
            }
            if (googleLink) {
                actionsHtml += `<a href="${googleLink}" target="_blank" class="action-btn-sm google-btn" onclick="event.stopPropagation()" title="Open in Google"><i class="bi bi-google"></i></a>`;
            }
            actionsHtml += '</div>';
        }

        return `
            <div class="col">
                <div class="file-card" onclick="navigate('${link}')" data-file-type="${item.type}">
                    <div class="card-body">
                        ${actionsHtml}
                        <div class="file-icon ${cfg.class}">
                            <i class="bi ${cfg.icon}"></i>
                        </div>
                        <div class="file-name text-truncate" title="${item.name}">${item.name}</div>
                    </div>
                </div>
            </div>
        `;
    }

    // Create list row HTML
    function createFileRow(item) {
        const typeConfig = {
            folder: { icon: 'bi-folder-fill', class: 'folder' },
            pdf: { icon: 'bi-file-earmark-pdf-fill', class: 'pdf' },
            image: { icon: 'bi-file-earmark-image-fill', class: 'image' },
            slides: { icon: 'bi-file-earmark-slides-fill', class: 'slides' },
            sheet: { icon: 'bi-file-earmark-spreadsheet-fill', class: 'sheet' },
            doc: { icon: 'bi-file-earmark-word-fill', class: 'doc' },
            video: { icon: 'bi-file-earmark-play-fill', class: 'video' },
            file: { icon: 'bi-file-earmark-fill', class: 'file' }
        };

        const cfg = typeConfig[item.type] || typeConfig.file;
        let link, rawLink = '', googleLink = '';

        if (CONFIG.isApi) {
            link = item.type === 'folder' ? `/drive/api/browse/${item.path}` : `/drive/api/open/${item.path}`;
            // For API files, use download endpoint for copy link
            if (item.type !== 'folder' && !['slides', 'sheet', 'doc', 'video'].includes(item.type)) {
                rawLink = `/drive/api/download/${item.path}`;
            }
            if (item.type === 'slides') googleLink = `https://docs.google.com/presentation/d/${item.path}/edit`;
            else if (item.type === 'sheet') googleLink = `https://docs.google.com/spreadsheets/d/${item.path}/edit`;
            else if (item.type === 'doc') googleLink = `https://docs.google.com/document/d/${item.path}/edit`;
        } else {
            link = item.type === 'folder' ? `/drive/browse/${CONFIG.sourceId}/${item.path}` : `/drive/file/${CONFIG.sourceId}/${item.path}`;
            if (item.type !== 'folder' && !['slides', 'sheet', 'doc', 'video'].includes(item.type)) {
                rawLink = `/drive/raw/${CONFIG.sourceId}/${item.path}`;
            }
        }

        let actionsHtml = '';
        if (item.type !== 'folder') {
            actionsHtml = '<div class="file-actions">';
            if (rawLink) {
                actionsHtml += `<button class="action-btn-sm" onclick="event.stopPropagation(); copyFileLink('${rawLink}', this)" title="Copy download link"><i class="bi bi-link-45deg"></i></button>`;
            }
            if (googleLink) {
                actionsHtml += `<a href="${googleLink}" target="_blank" class="action-btn-sm google-btn" onclick="event.stopPropagation()" title="Open in Google"><i class="bi bi-google"></i></a>`;
            }
            actionsHtml += '</div>';
        }

        return `
            <div class="file-row" onclick="navigate('${link}')">
                <div class="file-icon ${cfg.class}">
                    <i class="bi ${cfg.icon}"></i>
                </div>
                <div class="file-name">${item.name}</div>
                <span class="badge bg-secondary">${item.type}</span>
                ${actionsHtml}
            </div>
        `;
    }

    // Load more files
    async function loadMoreFiles() {
        if (lazyState.loading || !lazyState.hasMore) return;

        lazyState.loading = true;
        document.getElementById('loadingMore').classList.add('active');

        try {
            let url;
            if (CONFIG.isApi) {
                url = `/drive/api/files/${CONFIG.folderId}`;
                if (lazyState.nextToken) url += `?page_token=${lazyState.nextToken}`;
            } else {
                url = `/drive/local/files/${CONFIG.sourceId}?offset=${lazyState.offset}&limit=50`;
                if (CONFIG.subpath) url += `&path=${encodeURIComponent(CONFIG.subpath)}`;
            }

            const response = await fetch(url);
            const data = await response.json();

            if (data.error) {
                console.error(data.error);
                return;
            }

            const gridView = document.getElementById('grid-view');
            const listView = document.getElementById('list-view');

            data.items.forEach(item => {
                gridView.insertAdjacentHTML('beforeend', createFileCard(item));
                listView.insertAdjacentHTML('beforeend', createFileRow(item));
                lazyState.itemCount++;
            });

            // Update item count
            document.getElementById('item-count').textContent = lazyState.itemCount;

            // Re-attach hover listeners for new cards
            attachHoverListeners();

            // Update pagination state
            if (CONFIG.isApi) {
                lazyState.nextToken = data.next_token;
                lazyState.hasMore = data.has_more;
            } else {
                lazyState.offset += data.items.length;
                lazyState.hasMore = data.has_more;
            }

        } catch (error) {
            console.error('Failed to load files:', error);
        } finally {
            lazyState.loading = false;
            document.getElementById('loadingMore').classList.remove('active');
        }
    }

    // Attach hover listeners for file actions
    function attachHoverListeners() {
        document.querySelectorAll('.file-card').forEach(card => {
            const actions = card.querySelector('.file-actions');
            if (actions && !card.dataset.hoverAttached) {
                card.addEventListener('mouseenter', () => actions.style.opacity = '1');
                card.addEventListener('mouseleave', () => actions.style.opacity = '0');
                card.dataset.hoverAttached = 'true';
            }
        });
    }

    // Infinite scroll
    function setupInfiniteScroll() {
        const observer = new IntersectionObserver((entries) => {
            if (entries[0].isIntersecting && lazyState.hasMore) {
                loadMoreFiles();
            }
        }, { rootMargin: '200px' });

        observer.observe(document.getElementById('loadingMore'));
    }

    // Initialize
    document.addEventListener('DOMContentLoaded', () => {
        const savedView = localStorage.getItem('driveViewMode') || 'grid';
        switchView(savedView);
        attachHoverListeners();

        // Start lazy loading if enabled
        if (CONFIG.lazyLoad) {
            setupInfiniteScroll();
            loadMoreFiles();
        }
    });
</script>
{% endblock %}