{% extends "base.html" %}

{% block title %}Question Table Generator{% endblock %}

{% block head %}
<style>
    body {
        padding-bottom: 100px; /* Extra space at bottom for device chrome */
    }

    .qtab-container {
        max-width: 1400px;
        margin: 0 auto;
        padding: 20px;
        min-height: calc(100vh - 150px); /* Dynamic height with bottom space */
    }

    .upload-section {
        background: #212529;
        padding: 30px;
        border-radius: 12px;
        margin-bottom: 30px;
        border: 2px dashed #495057;
        text-align: center;
        transition: all 0.3s;
    }

    .upload-section.dragover {
        border-color: #0d6efd;
        background: #1a1d20;
    }

    .upload-section.paste-active {
        border-color: #28a745;
        background: #1a2520;
    }

    .folder-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 15px;
        margin-bottom: 30px;
    }

    .folder-card {
        background: #212529;
        padding: 20px;
        border-radius: 8px;
        text-align: center;
        cursor: pointer;
        transition: all 0.3s;
        border: 1px solid #495057;
        position: relative;
    }

    .folder-card:hover {
        background: #2c3136;
        border-color: #0d6efd;
        transform: translateY(-2px);
    }

    .folder-card i {
        font-size: 48px;
        color: #0d6efd;
        margin-bottom: 10px;
    }

    .images-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 20px;
    }

    .image-card {
        background: #212529;
        border-radius: 12px;
        overflow: hidden;
        border: 1px solid #495057;
        transition: all 0.3s;
        position: relative;
    }

    .image-card.selected {
        border-color: #0d6efd;
        box-shadow: 0 0 10px rgba(13, 110, 253, 0.5);
    }

    .image-card:hover {
        border-color: #0d6efd;
        transform: translateY(-2px);
    }

    .image-card .selection-checkbox {
        position: absolute;
        top: 10px;
        left: 10px;
        z-index: 10;
        width: 20px;
        height: 20px;
        cursor: pointer;
    }

    .image-preview {
        width: 100%;
        height: 200px;
        object-fit: cover;
        background: #343a40;
    }

    .image-content {
        padding: 15px;
    }

    .result-section {
        margin-top: 10px;
        padding: 10px;
        background: #343a40;
        border-radius: 6px;
        max-height: 300px;
        overflow-y: auto;
    }

    .result-success {
        border-left: 3px solid #28a745;
    }

    .result-error {
        border-left: 3px solid #dc3545;
    }

    .section-group {
        margin-bottom: 15px;
    }

    .section-title {
        font-weight: bold;
        color: #0d6efd;
        margin-bottom: 5px;
    }

    .qa-pair {
        display: flex;
        justify-content: space-between;
        padding: 5px;
        margin: 2px 0;
        background: #212529;
        border-radius: 4px;
    }

    .upload-btn {
        display: inline-block;
        padding: 12px 30px;
        background: #0d6efd;
        color: white;
        border-radius: 8px;
        cursor: pointer;
        transition: all 0.3s;
    }

    .upload-btn:hover {
        background: #0b5ed7;
        transform: scale(1.05);
    }

    #imageInput {
        display: none;
    }

    .loading-spinner {
        display: none;
        margin: 20px auto;
    }

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

    /* Paste indicator */
    .paste-hint {
        font-size: 0.9em;
        color: #6c757d;
        margin-top: 10px;
    }

    .paste-hint .kbd {
        background: #343a40;
        padding: 2px 6px;
        border-radius: 4px;
        font-family: monospace;
    }
</style>
{% endblock %}

{% block content %}
<div class="qtab-container">
    <!-- Toolbar -->
    <div class="d-flex justify-content-between align-items-center mb-3">
        <div>
            <h2 class="mb-0"><i class="bi bi-table"></i> Question Table Generator</h2>
            <nav aria-label="breadcrumb">
                <ol class="breadcrumb mb-0">
                    <li class="breadcrumb-item"><a href="{{ url_for('qtab.qtab_list') }}">Home</a></li>
                    {% for crumb in breadcrumbs %}
                        <li class="breadcrumb-item"><a href="{{ url_for('qtab.qtab_list', folder_path=crumb.path) }}">{{ crumb.name }}</a></li>
                    {% endfor %}
                </ol>
            </nav>
        </div>
        <div class="btn-group">
            <button type="button" class="btn btn-primary" onclick="showCreateFolderModal()">
                <i class="bi bi-folder-plus"></i> New Folder
            </button>
            <button type="button" class="btn btn-warning text-dark" id="moveBtn" disabled data-bs-toggle="modal" data-bs-target="#moveModal">
                <i class="bi bi-arrow-right-square"></i> Move Selected
            </button>
            <button type="button" class="btn btn-danger" id="deleteBtn" disabled onclick="deleteSelectedImages()">
                <i class="bi bi-trash"></i> Delete Selected
            </button>
        </div>
    </div>

    <!-- Flash Messages -->
    {% with messages = get_flashed_messages(with_categories=true) %}
        {% if messages %}
            {% for category, message in messages %}
                <div class="alert alert-{{ category }} alert-dismissible fade show" role="alert">
                    {{ message }}
                    <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
                </div>
            {% endfor %}
        {% endif %}
    {% endwith %}

    <!-- Upload Section -->
    <div class="upload-section" id="uploadSection">
        <i class="fas fa-cloud-upload-alt fa-3x mb-3"></i>
        <h4>Upload Image for Question Extraction</h4>
        <p class="text-muted">Drag and drop an image here, or click to select</p>
        <label for="imageInput" class="upload-btn">
            <i class="fas fa-upload"></i> Choose Image
        </label>
        <input type="file" id="imageInput" accept="image/*">
        <div class="paste-hint">
            <span class="kbd">Ctrl+V</span> to paste image from clipboard
        </div>
        <div class="spinner-border loading-spinner" role="status">
            <span class="visually-hidden">Processing...</span>
        </div>
    </div>

    <!-- Folders Section -->
    {% if subfolders %}
    <h3 class="mb-3"><i class="fas fa-folder"></i> Folders</h3>
    <div class="folder-grid">
        {% for folder in subfolders %}
        <div class="folder-card" onclick="navigateToFolder('{{ folder.name }}')">
            <i class="fas fa-folder"></i>
            <div>{{ folder.name }}</div>
        </div>
        {% endfor %}
    </div>
    {% endif %}

    <!-- Images Section -->
    {% if images %}
    <h3 class="mb-3"><i class="fas fa-images"></i> Processed Images</h3>
    <div class="images-grid" id="imagesGrid">
        {% for image in images %}
        <div class="image-card" data-image-id="{{ image.id }}">
            <input type="checkbox" class="form-check-input selection-checkbox image-checkbox" value="{{ image.id }}">
            <img src="{{ url_for('qtab.serve_qtab_image', filename=image.filename) }}" 
                 class="image-preview" 
                 alt="{{ image.original_name }}"
                 onerror="this.src='data:image/svg+xml,%3Csvg xmlns=%22http://www.w3.org/2000/svg%22 width=%22100%22 height=%22100%22%3E%3Crect fill=%22%23343a40%22 width=%22100%22 height=%22100%22/%3E%3Ctext fill=%22%236c757d%22 x=%2250%25%22 y=%2250%25%22 text-anchor=%22middle%22 dy=%22.3em%22%3ENo Preview%3C/text%3E%3C/svg%3E'">
            <div class="image-content">
                <div class="d-flex justify-content-between align-items-start">
                    <h6 class="mb-1">{{ image.original_name }}</h6>
                    <button class="btn btn-sm btn-link p-0" onclick="renameImage({{ image.id }}, '{{ image.original_name }}')" title="Rename">
                        <i class="bi bi-pencil"></i>
                    </button>
                </div>
                <small class="text-muted">{{ image.created_at }}</small>
                
                {% if image.result_json %}
                <div class="result-section result-{{ image.status }}">
                    <div id="result-{{ image.id }}"></div>
                </div>
                <script>
                    (function() {
                        try {
                            const result = {{ image.result_json | safe }};
                            const container = document.getElementById('result-{{ image.id }}');
                            
                            if (result.status === 'success') {
                                if (Array.isArray(result.data)) {
                                    // No sections
                                    container.innerHTML = result.data.map(qa => 
                                        `<div class="qa-pair"><span>Q${qa.question_number}</span><span><strong>${qa.answer}</strong></span></div>`
                                    ).join('');
                                } else {
                                    // With sections
                                    container.innerHTML = Object.entries(result.data).map(([section, questions]) =>
                                        `<div class="section-group">
                                            <div class="section-title">${section}</div>
                                            ${questions.map(qa => 
                                                `<div class="qa-pair"><span>Q${qa.question_number}</span><span><strong>${qa.answer}</strong></span></div>`
                                            ).join('')}
                                        </div>`
                                    ).join('');
                                }
                            } else {
                                container.innerHTML = `<div class="text-danger"><i class="fas fa-exclamation-triangle"></i> ${result.message || 'Processing failed'}</div>`;
                            }
                        } catch(e) {
                            console.error('Error rendering result:', e);
                        }
                    })();
                </script>
                {% endif %}
                
                <div class="d-flex gap-2 mt-2">
                    <a href="{{ url_for('qtab.qtab_exam_mode', image_id=image.id) }}" class="btn btn-sm btn-primary flex-grow-1">
                        <i class="fas fa-graduation-cap"></i> Exam Mode
                    </a>
                    <button class="btn btn-sm btn-danger" onclick="deleteImage({{ image.id }})">
                        <i class="fas fa-trash"></i>
                    </button>
                </div>
            </div>
        </div>
        {% endfor %}
    </div>
    {% elif not subfolders %}
    <div class="alert alert-info">
        <i class="fas fa-info-circle"></i> No images uploaded yet. Upload an image to get started!
    </div>
    {% endif %}
</div>

<!-- Create Folder Modal -->
<div class="modal fade" id="createFolderModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content bg-dark">
            <div class="modal-header">
                <h5 class="modal-title">Create New Folder</h5>
                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="mb-3">
                    <label for="folderName" class="form-label">Folder Name</label>
                    <input type="text" class="form-control" id="folderName" placeholder="Enter folder name">
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-primary" onclick="createFolder()">Create</button>
            </div>
        </div>
    </div>
</div>

<!-- Move Modal -->
<div class="modal fade" id="moveModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content bg-dark">
            <div class="modal-header">
                <h5 class="modal-title">Move Images</h5>
                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="mb-3">
                    <label for="targetFolder" class="form-label">Select Destination Folder</label>
                    <select class="form-select" id="targetFolder">
                        <option value="">Root</option>
                        {% if folder_tree %}
                            {% for folder in folder_tree %}
                                <option value="{{ folder.id }}">{{ folder.path }}</option>
                            {% endfor %}
                        {% endif %}
                    </select>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-warning text-dark" onclick="moveSelectedImages()">Move</button>
            </div>
        </div>
    </div>
</div>

<!-- Rename Image Modal -->
<div class="modal fade" id="renameModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content bg-dark">
            <div class="modal-header">
                <h5 class="modal-title">Rename Image</h5>
                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="mb-3">
                    <label for="newImageName" class="form-label">New Name</label>
                    <input type="text" class="form-control" id="newImageName" placeholder="Enter new name">
                    <input type="hidden" id="renameImageId">
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                <button type="button" class="btn btn-primary" onclick="submitRename()">Rename</button>
            </div>
        </div>
    </div>
</div>

<script>
const currentFolderId = {{ current_folder_id | tojson }};
const currentFolderPath = '{{ breadcrumbs[-1].path if breadcrumbs else "" }}';

// File upload handling
const uploadSection = document.getElementById('uploadSection');
const imageInput = document.getElementById('imageInput');
const loadingSpinner = document.querySelector('.loading-spinner');

imageInput.addEventListener('change', handleFileSelect);

uploadSection.addEventListener('dragover', (e) => {
    e.preventDefault();
    uploadSection.classList.add('dragover');
});

uploadSection.addEventListener('dragleave', () => {
    uploadSection.classList.remove('dragover');
});

uploadSection.addEventListener('drop', (e) => {
    e.preventDefault();
    uploadSection.classList.remove('dragover');
    const files = e.dataTransfer.files;
    if (files.length > 0) {
        handleFile(files[0]);
    }
});

// Ctrl+V paste image support
document.addEventListener('paste', async (e) => {
    const items = e.clipboardData.items;
    for (let i = 0; i < items.length; i++) {
        if (items[i].type.indexOf('image') !== -1) {
            e.preventDefault();
            const blob = items[i].getAsFile();
            
            // Visual feedback
            uploadSection.classList.add('paste-active');
            setTimeout(() => uploadSection.classList.remove('paste-active'), 300);
            
            handleFile(blob);
            break;
        }
    }
});

function handleFileSelect(e) {
    const file = e.target.files[0];
    if (file) {
        handleFile(file);
    }
}

async function handleFile(file) {
    if (!file.type.startsWith('image/')) {
        alert('Please select an image file');
        return;
    }

    const formData = new FormData();
    formData.append('image', file);
    formData.append('folder_id', currentFolderId || '');

    loadingSpinner.classList.add('active');

    try {
        const response = await fetch('{{ url_for("qtab.qtab_upload") }}', {
            method: 'POST',
            body: formData
        });

        const result = await response.json();

        if (result.status === 'success' || result.status === 'error') {
            // Reload page to show new image
            window.location.reload();
        } else {
            alert('Upload failed: ' + (result.message || 'Unknown error'));
        }
    } catch (error) {
        console.error('Upload error:', error);
        alert('Upload failed: ' + error.message);
    } finally {
        loadingSpinner.classList.remove('active');
        imageInput.value = '';
    }
}

// Selection handling
const imageCheckboxes = document.querySelectorAll('.image-checkbox');
const moveBtn = document.getElementById('moveBtn');
const deleteBtn = document.getElementById('deleteBtn');

imageCheckboxes.forEach(checkbox => {
    checkbox.addEventListener('change', updateSelectionButtons);
});

function updateSelectionButtons() {
    const selectedCount = document.querySelectorAll('.image-checkbox:checked').length;
    moveBtn.disabled = selectedCount === 0;
    deleteBtn.disabled = selectedCount === 0;
    
    // Update card styling
    document.querySelectorAll('.image-card').forEach(card => {
        const checkbox = card.querySelector('.image-checkbox');
        if (checkbox && checkbox.checked) {
            card.classList.add('selected');
        } else {
            card.classList.remove('selected');
        }
    });
}

function navigateToFolder(folderName) {
    const newPath = currentFolderPath ? `${currentFolderPath}/${folderName}` : folderName;
    window.location.href = `{{ url_for('qtab.qtab_list') }}/${newPath}`;
}

function showCreateFolderModal() {
    const modal = new bootstrap.Modal(document.getElementById('createFolderModal'));
    modal.show();
}

async function createFolder() {
    const folderName = document.getElementById('folderName').value.trim();
    
    if (!folderName) {
        alert('Please enter a folder name');
        return;
    }

    try {
        const response = await fetch('{{ url_for("qtab.qtab_create_folder") }}', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                name: folderName,
                parent_id: currentFolderId
            })
        });

        const result = await response.json();

        if (result.success) {
            window.location.reload();
        } else {
            alert('Error: ' + (result.error || 'Failed to create folder'));
        }
    } catch (error) {
        console.error('Error creating folder:', error);
        alert('Error: ' + error.message);
    }
}

// Rename image
function renameImage(imageId, currentName) {
    document.getElementById('renameImageId').value = imageId;
    document.getElementById('newImageName').value = currentName;
    const modal = new bootstrap.Modal(document.getElementById('renameModal'));
    modal.show();
}

async function submitRename() {
    const imageId = document.getElementById('renameImageId').value;
    const newName = document.getElementById('newImageName').value.trim();
    
    if (!newName) {
        alert('Please enter a name');
        return;
    }

    try {
        const response = await fetch('{{ url_for("qtab.qtab_rename_image", image_id=0) }}'.replace('0', imageId), {
            method: 'PUT',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ name: newName })
        });

        const result = await response.json();

        if (result.success) {
            window.location.reload();
        } else {
            alert('Error: ' + (result.error || 'Failed to rename image'));
        }
    } catch (error) {
        console.error('Error renaming image:', error);
        alert('Error: ' + error.message);
    }
}

// Move selected images
async function moveSelectedImages() {
    const selectedIds = Array.from(document.querySelectorAll('.image-checkbox:checked'))
        .map(cb => parseInt(cb.value));
    
    if (selectedIds.length === 0) {
        alert('No images selected');
        return;
    }

    const targetFolderId = document.getElementById('targetFolder').value || null;

    try {
        const response = await fetch('{{ url_for("qtab.qtab_move_images") }}', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({
                image_ids: selectedIds,
                target_folder_id: targetFolderId
            })
        });

        const result = await response.json();

        if (result.success) {
            window.location.reload();
        } else {
            alert('Error: ' + (result.error || 'Failed to move images'));
        }
    } catch (error) {
        console.error('Error moving images:', error);
        alert('Error: ' + error.message);
    }
}

// Delete selected images
async function deleteSelectedImages() {
    const selectedIds = Array.from(document.querySelectorAll('.image-checkbox:checked'))
        .map(cb => parseInt(cb.value));
    
    if (selectedIds.length === 0) {
        alert('No images selected');
        return;
    }

    if (!confirm(`Are you sure you want to delete ${selectedIds.length} image(s)?`)) {
        return;
    }

    try {
        // Delete each image
        for (const imageId of selectedIds) {
            await fetch(`{{ url_for('qtab.qtab_delete_image', image_id=0) }}`.replace('0', imageId), {
                method: 'DELETE'
            });
        }
        window.location.reload();
    } catch (error) {
        console.error('Error deleting images:', error);
        alert('Error: ' + error.message);
    }
}

async function deleteImage(imageId) {
    if (!confirm('Are you sure you want to delete this image?')) {
        return;
    }

    try {
        const response = await fetch(`{{ url_for('qtab.qtab_delete_image', image_id=0) }}`.replace('0', imageId), {
            method: 'DELETE'
        });

        const result = await response.json();

        if (result.success) {
            // Remove card from DOM
            const card = document.querySelector(`[data-image-id="${imageId}"]`);
            if (card) {
                card.remove();
            }
        } else {
            alert('Error: ' + (result.error || 'Failed to delete image'));
        }
    } catch (error) {
        console.error('Error deleting image:', error);
        alert('Error: ' + error.message);
    }
}
</script>
{% endblock %}