// State management
let currentMode = 'template';
let isRecording = false;
let isPlaying = false;
let uploadedImage = null;
let recordingInterval = null;
let recordingTime = 0;
let generationQueue = [];
let currentGeneration = null;
let selectedTemplate = null;
let selectedMusic = null;
let audioContext = null;

// Initialize
document.addEventListener('DOMContentLoaded', () => {
    lucide.createIcons();
    initializeDragDrop();
    initializeSliders();
    initializeCheckboxes();
    initializeGenerations();
});

// Drag and Drop Setup
function initializeDragDrop() {
    const uploadZone = document.getElementById('uploadZone');
    if (!uploadZone) return;
    
    ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
        uploadZone.addEventListener(eventName, preventDefaults, false);
    });
    
    function preventDefaults(e) {
        e.preventDefault();
        e.stopPropagation();
    }
    
    uploadZone.addEventListener('dragenter', () => {
        uploadZone.classList.add('dragover');
    });
    
    uploadZone.addEventListener('dragleave', () => {
        uploadZone.classList.remove('dragover');
    });
    
    uploadZone.addEventListener('drop', (e) => {
        uploadZone.classList.remove('dragover');
        const dt = e.dataTransfer;
        const files = dt.files;
        if (files.length > 0) {
            handleFile(files[0]);
        }
    });
}

// Initialize range sliders with value display
function initializeSliders() {
    const sliders = document.querySelectorAll('.slider-thumb');
    sliders.forEach(slider => {
        const updateValue = () => {
            const valueDisplay = slider.parentElement.querySelector('span:last-child');
            if (valueDisplay) {
                let suffix = '%';
                if (slider.parentElement.textContent.includes('Blink')) suffix = '';
                valueDisplay.textContent = slider.value + suffix;
            }
        };
        slider.addEventListener('input', updateValue);
    });
}

// Initialize checkboxes with visual feedback
function initializeCheckboxes() {
    const checkboxes = document.querySelectorAll('input[type="checkbox"]');
    checkboxes.forEach(checkbox => {
        checkbox.addEventListener('change', (e) => {
            const label = e.target.closest('label');
            if (label) {
                if (e.target.checked) {
                    label.classList.add('bg-violet-50');
                } else {
                    label.classList.remove('bg-violet-50');
                }
            }
        });
    });
}

// Initialize generations with demo data
function initializeGenerations() {
    // Simulate real-time progress updates
    setInterval(() => {
        updateProcessingItems();
    }, 3000);
}

// Mode selection
function selectMode(mode, element) {
    currentMode = mode;
    
    // Update UI
    document.querySelectorAll('.mode-card').forEach(card => {
        card.classList.remove('active');
    });
    element.classList.add('active');
    
    // Show/hide sections with animation
    const sections = {
        template: document.getElementById('templateSection'),
        music: document.getElementById('musicSection'),
        voice: document.getElementById('voiceSection')
    };
    
    Object.values(sections).forEach(section => {
        if (section) {
            section.classList.add('hidden');
            section.style.opacity = '0';
        }
    });
    
    if (sections[mode]) {
        sections[mode].classList.remove('hidden');
        setTimeout(() => {
            sections[mode].style.transition = 'opacity 0.2s ease';
            sections[mode].style.opacity = '1';
        }, 10);
    }
    
    lucide.createIcons();
}

// Image upload handling
function handleImageUpload(event) {
    const file = event.target.files[0];
    if (file) {
        handleFile(file);
    }
}

function handleFile(file) {
    if (!file.type.startsWith('image/')) {
        showNotification('Please upload an image file (JPG, PNG, WEBP)', 'error');
        return;
    }
    
    if (file.size > 10 * 1024 * 1024) {
        showNotification('File size must be less than 10MB', 'error');
        return;
    }
    
    const reader = new FileReader();
    reader.onload = (e) => {
        uploadedImage = e.target.result;
        updateUploadUI(file.name);
        showNotification('Image uploaded successfully!', 'success');
    };
    reader.readAsDataURL(file);
}

function updateUploadUI(filename) {
    const placeholder = document.getElementById('uploadPlaceholder');
    const preview = document.getElementById('imagePreview');
    const previewImg = document.getElementById('previewImage');
    const activePreview = document.getElementById('activePreview');
    const previewPlaceholder = document.getElementById('previewPlaceholder');
    const summaryInput = document.getElementById('summaryInput');
    
    if (placeholder) placeholder.classList.add('hidden');
    if (preview) {
        preview.classList.remove('hidden');
        const img = preview.querySelector('img');
        if (img) img.src = uploadedImage;
    }
    
    if (previewPlaceholder) previewPlaceholder.classList.add('hidden');
    if (activePreview) {
        activePreview.classList.remove('hidden');
        if (previewImg) previewImg.src = uploadedImage;
    }
    
    if (summaryInput) summaryInput.textContent = filename;
}

function removeImage() {
    uploadedImage = null;
    document.getElementById('uploadPlaceholder').classList.remove('hidden');
    document.getElementById('imagePreview').classList.add('hidden');
    document.getElementById('fileInput').value = '';
    
    document.getElementById('previewPlaceholder').classList.remove('hidden');
    document.getElementById('activePreview').classList.add('hidden');
    document.getElementById('summaryInput').textContent = 'No image';
    
    showNotification('Image removed', 'info');
}

// Template selection in sidebar
function selectTemplate(element, templateName) {
    selectedTemplate = templateName;
    
    document.querySelectorAll('.template-option').forEach(opt => {
        opt.classList.remove('bg-violet-50', 'border-violet-300');
        opt.classList.add('border-gray-200');
    });
    
    element.classList.remove('border-gray-200');
    element.classList.add('bg-violet-50', 'border-violet-300');
    
    // Update preview if image is uploaded
    if (uploadedImage) {
        showNotification(`Template "${templateName}" selected`, 'success');
    }
}

// Template selection in grid
function selectTemplateCard(element) {
    document.querySelectorAll('.template-card').forEach(card => {
        card.classList.remove('selected');
    });
    element.classList.add('selected');
    
    // Extract template name
    const nameEl = element.querySelector('h4');
    if (nameEl) selectedTemplate = nameEl.textContent;
    
    // Switch to preview tab with animation
    setTimeout(() => {
        const previewBtn = document.querySelector('button[onclick*="preview"]');
        if (previewBtn) switchTab('preview', previewBtn);
    }, 200);
    
    showNotification('Template selected', 'success');
}

// Tab switching
function switchTab(tabName, element) {
    const tabs = ['previewTab', 'templatesTab', 'audioTab', 'captionsTab'];
    
    tabs.forEach(tab => {
        const el = document.getElementById(tab);
        if (el) {
            el.classList.add('hidden');
            el.style.opacity = '0';
        }
    });
    
    const selectedTab = document.getElementById(tabName + 'Tab');
    if (selectedTab) {
        selectedTab.classList.remove('hidden');
        setTimeout(() => {
            selectedTab.style.transition = 'opacity 0.3s ease';
            selectedTab.style.opacity = '1';
        }, 10);
    }
    
    document.querySelectorAll('.tab-active').forEach(btn => {
        btn.classList.remove('tab-active');
        btn.classList.add('text-gray-500');
    });
    
    if (element) {
        element.classList.remove('text-gray-500');
        element.classList.add('tab-active');
    }
    
    lucide.createIcons();
}

// Aspect ratio selection
function setAspect(btn) {
    document.querySelectorAll('.aspect-btn').forEach(b => {
        b.classList.remove('border-violet-500', 'bg-violet-50', 'text-violet-700');
        b.classList.add('border-gray-200', 'text-gray-600');
    });
    
    btn.classList.remove('border-gray-200', 'text-gray-600');
    btn.classList.add('border-violet-500', 'bg-violet-50', 'text-violet-700');
    
    // Update preview aspect ratio
    const activePreview = document.getElementById('activePreview');
    if (activePreview) {
        const ratio = btn.textContent.trim();
        if (ratio === '1:1') activePreview.style.aspectRatio = '1/1';
        else if (ratio === '4:5') activePreview.style.aspectRatio = '4/5';
        else if (ratio === '9:16') activePreview.style.aspectRatio = '9/16';
        else if (ratio === '16:9') activePreview.style.aspectRatio = '16/9';
    }
}

// Recording functionality
function toggleRecording() {
    const btn = document.getElementById('recordBtn');
    const icon = document.getElementById('recordIcon');
    const text = document.getElementById('recordText');
    
    if (!isRecording) {
        // Start recording
        isRecording = true;
        recordingTime = 0;
        
        if (icon) {
            icon.classList.add('recording-pulse');
            icon.classList.remove('rounded-full');
            icon.classList.add('rounded-sm');
        }
        
        if (text) text.textContent = 'Stop Recording (0:00)';
        if (btn) {
            btn.classList.remove('bg-red-50', 'border-red-200');
            btn.classList.add('bg-red-100', 'border-red-300');
        }
        
        // Simulate recording timer
        recordingInterval = setInterval(() => {
            recordingTime++;
            const mins = Math.floor(recordingTime / 60);
            const secs = recordingTime % 60;
            if (text) {
                text.textContent = `Stop Recording (${mins}:${secs.toString().padStart(2, '0')})`;
            }
        }, 1000);
        
        showNotification('Recording started...', 'info');
        
        // Simulate recording limit
        setTimeout(() => {
            if (isRecording) toggleRecording();
        }, 60000); // Auto stop after 60 seconds
        
    } else {
        // Stop recording
        isRecording = false;
        clearInterval(recordingInterval);
        
        if (icon) {
            icon.classList.remove('recording-pulse');
            icon.classList.add('rounded-full');
            icon.classList.remove('rounded-sm');
        }
        
        if (text) text.textContent = 'Record Voice';
        if (btn) {
            btn.classList.add('bg-red-50', 'border-red-200');
            btn.classList.remove('bg-red-100', 'border-red-300');
        }
        
        showNotification(`Recording saved (${recordingTime}s)`, 'success');
        
        // Add to generations
        addGenerationToQueue({
            name: `Voice Recording (${recordingTime}s)`,
            type: 'Voice',
            status: 'completed',
            duration: `${recordingTime}s`,
            resolution: '1080p'
        });
    }
}

// Play/Pause toggle for preview
function togglePlay() {
    const playIcon = document.getElementById('playIcon');
    const progressBar = document.getElementById('progressBar');
    
    isPlaying = !isPlaying;
    
    if (isPlaying) {
        if (playIcon) {
            playIcon.setAttribute('data-lucide', 'pause');
            lucide.createIcons();
        }
        
        // Simulate progress
        if (progressBar) {
            progressBar.style.width = '0%';
            setTimeout(() => {
                progressBar.style.transition = 'width 15s linear';
                progressBar.style.width = '100%';
            }, 100);
        }
        
        showNotification('Playing preview...', 'info');
        
        setTimeout(() => {
            isPlaying = false;
            if (playIcon) {
                playIcon.setAttribute('data-lucide', 'play');
                lucide.createIcons();
            }
            if (progressBar) {
                progressBar.style.transition = 'none';
                progressBar.style.width = '0%';
            }
        }, 15000);
    } else {
        if (playIcon) {
            playIcon.setAttribute('data-lucide', 'play');
            lucide.createIcons();
        }
        if (progressBar) {
            progressBar.style.transition = 'none';
        }
    }
}

// Generate Lip Sync
function generateLipSync() {
    if (!uploadedImage) {
        showNotification('Please upload a cat photo first', 'error');
        document.getElementById('uploadZone').scrollIntoView({ behavior: 'smooth' });
        return;
    }
    
    if (!selectedTemplate && currentMode === 'template') {
        showNotification('Please select a template', 'error');
        return;
    }
    
    // Deduct credits
    const creditsBadge = document.querySelector('.text-violet-900');
    if (creditsBadge) {
        let credits = parseInt(creditsBadge.textContent.replace(/,/g, ''));
        credits -= 45;
        creditsBadge.textContent = credits.toLocaleString() + ' credits';
    }
    
    // Add to generations
    const generationId = Date.now();
    const newGeneration = {
        id: generationId,
        name: selectedTemplate || 'Custom Generation',
        type: currentMode === 'template' ? 'Template' : currentMode === 'music' ? 'Music' : 'Voice',
        status: 'processing',
        progress: 0,
        timestamp: new Date(),
        duration: '0:15',
        resolution: '1080p'
    };
    
    addGenerationToQueue(newGeneration);
    showNotification('Generation started! Check the Generations panel.', 'success');
    
    // Simulate generation progress
    simulateGenerationProgress(generationId);
}

// Add generation to queue and UI
function addGenerationToQueue(generation) {
    generationQueue.push(generation);
    renderGenerationCard(generation);
}

// Render generation card
function renderGenerationCard(generation) {
    const container = document.querySelector('.overflow-y-auto.custom-scrollbar');
    if (!container) return;
    
    const card = document.createElement('div');
    card.className = 'generation-card bg-white border border-gray-200 rounded-xl p-3 shadow-sm mb-3';
    card.id = `gen-${generation.id}`;
    
    const statusColor = generation.status === 'completed' ? 'green' : generation.status === 'failed' ? 'red' : 'amber';
    
    card.innerHTML = `
        <div class="flex items-start space-x-3">
            <div class="w-16 h-16 bg-gray-100 rounded-lg flex-shrink-0 overflow-hidden relative">
                ${uploadedImage ? `<img src="${uploadedImage}" class="w-full h-full object-cover opacity-50">` : ''}
                ${generation.status === 'processing' ? `
                    <div class="absolute inset-0 flex items-center justify-center">
                        <div class="w-6 h-6 border-2 border-violet-600 border-t-transparent rounded-full animate-spin"></div>
                    </div>
                ` : ''}
            </div>
            <div class="flex-1 min-w-0">
                <div class="flex items-center justify-between mb-1">
                    <span class="text-[10px] font-medium text-${statusColor}-600 bg-${statusColor}-50 px-1.5 py-0.5 rounded capitalize">${generation.status}</span>
                    <button class="text-gray-400 hover:text-gray-600" onclick="deleteGeneration(${generation.id})">
                        <i data-lucide="x" class="w-3 h-3"></i>
                    </button>
                </div>
                <p class="text-xs font-medium text-gray-900 truncate">${generation.name}</p>
                <p class="text-[10px] text-gray-500">${generation.type} • Just now</p>
                ${generation.status === 'processing' ? `
                    <div class="mt-2">
                        <div class="flex justify-between text-[10px] text-gray-500 mb-1">
                            <span>Rendering lip sync...</span>
                            <span class="progress-text">0%</span>
                        </div>
                        <div class="h-1 bg-gray-100 rounded-full overflow-hidden">
                            <div class="h-full progress-bar w-0 rounded-full transition-all duration-300"></div>
                        </div>
                    </div>
                ` : ''}
            </div>
        </div>
    `;
    
    container.insertBefore(card, container.firstChild);
    lucide.createIcons();
}

// Simulate generation progress
function simulateGenerationProgress(generationId) {
    let progress = 0;
    const interval = setInterval(() => {
        progress += Math.random() * 15;
        if (progress >= 100) {
            progress = 100;
            clearInterval(interval);
            completeGeneration(generationId);
        }
        
        updateGenerationProgress(generationId, progress);
    }, 1000);
}

// Update generation progress UI
function updateGenerationProgress(generationId, progress) {
    const card = document.getElementById(`gen-${generationId}`);
    if (!card) return;
    
    const bar = card.querySelector('.progress-bar');
    const text = card.querySelector('.progress-text');
    
    if (bar) bar.style.width = progress + '%';
    if (text) text.textContent = Math.round(progress) + '%';
}

// Complete generation
function completeGeneration(generationId) {
    const card = document.getElementById(`gen-${generationId}`);
    if (!card) return;
    
    card.innerHTML = `
        <div class="flex items-start space-x-3">
            <div class="w-16 h-16 bg-gray-100 rounded-lg flex-shrink-0 overflow-hidden relative group cursor-pointer">
                <img src="${uploadedImage}" class="w-full h-full object-cover">
                <div class="absolute inset-0 bg-black/40 opacity-0 group-hover:opacity-100 transition-opacity flex items-center justify-center">
                    <i data-lucide="play" class="w-6 h-6 text-white fill-current"></i>
                </div>
            </div>
            <div class="flex-1 min-w-0">
                <div class="flex items-center justify-between mb-1">
                    <span class="text-[10px] font-medium text-green-600 bg-green-50 px-1.5 py-0.5 rounded">Completed</span>
                    <button class="text-gray-400 hover:text-gray-600" onclick="deleteGeneration(${generationId})">
                        <i data-lucide="x" class="w-3 h-3"></i>
                    </button>
                </div>
                <p class="text-xs font-medium text-gray-900 truncate">Ready to download</p>
                <p class="text-[10px] text-gray-500">0:15 • 1080p</p>
                <div class="flex items-center space-x-2 mt-2 opacity-0 group-hover:opacity-100 transition-opacity">
                    <button class="text-[10px] text-violet-600 hover:text-violet-700 font-medium" onclick="downloadGeneration(${generationId})">
                        Download
                    </button>
                    <button class="text-[10px] text-gray-500 hover:text-gray-700 font-medium">Duplicate</button>
                </div>
            </div>
        </div>
    `;
    
    card.classList.add('group', 'cursor-pointer');
    lucide.createIcons();
    showNotification('Generation complete!', 'success');
}

// Delete generation
function deleteGeneration(generationId) {
    const card = document.getElementById(`gen-${generationId}`);
    if (card) {
        card.style.opacity = '0';
        card.style.transform = 'translateX(20px)';
        setTimeout(() => card.remove(), 300);
        generationQueue = generationQueue.filter(g => g.id !== generationId);
    }
}

// Download generation
function downloadGeneration(generationId) {
    showNotification('Downloading video...', 'success');
    // Simulate download
    setTimeout(() => {
        showNotification('Download complete!', 'success');
    }, 2000);
}

// Update processing items animation
function updateProcessingItems() {
    const processingBars = document.querySelectorAll('.progress-bar');
    processingBars.forEach(bar => {
        if (bar.style.width && parseInt(bar.style.width) < 100) {
            const currentWidth = parseInt(bar.style.width) || 0;
            const newWidth = Math.min(currentWidth + Math.random() * 10, 95);
            bar.style.width = newWidth + '%';
            
            const text = bar.parentElement.previousElementSibling?.querySelector('.progress-text');
            if (text) text.textContent = Math.round(newWidth) + '%';
        }
    });
}

// Reset form
function resetForm() {
    if (confirm('Reset all settings? This will clear your image and selections.')) {
        removeImage();
        
        document.querySelectorAll('.template-option').forEach(opt => {
            opt.classList.remove('bg-violet-50', 'border-violet-300');
            opt.classList.add('border-gray-200');
        });
        
        document.querySelectorAll('.template-card').forEach(card => {
            card.classList.remove('selected');
        });
        
        document.querySelectorAll('.slider-thumb').forEach(slider => {
            slider.value = 50;
            const display = slider.parentElement.querySelector('span:last-child');
            if (display) display.textContent = '50%';
        });
        
        document.querySelectorAll('input[type="checkbox"]').forEach(cb => {
            cb.checked = false;
        });
        
        selectMode('template', document.querySelector('.mode-card.active'));
        
        document.querySelectorAll('.aspect-btn').forEach((btn, index) => {
            if (index === 0) setAspect(btn);
        });
        
        showNotification('Form reset', 'info');
    }
}

// Notification system
function showNotification(message, type = 'info') {
    const notification = document.createElement('div');
    const colors = {
        success: 'bg-green-500',
        error: 'bg-red-500',
        info: 'bg-violet-500'
    };
    
    notification.className = `fixed bottom-4 right-4 ${colors[type]} text-white px-4 py-2 rounded-lg shadow-lg z-50 text-sm font-medium transform translate-y-0 transition-all duration-300`;
    notification.textContent = message;
    
    document.body.appendChild(notification);
    
    setTimeout(() => {
        notification.style.opacity = '0';
        notification.style.transform = 'translateY(10px)';
        setTimeout(() => notification.remove(), 300);
    }, 3000);
}

// Music selection
function selectMusic(element, trackName) {
    selectedMusic = trackName;
    document.querySelectorAll('.music-track').forEach(track => {
        track.classList.remove('bg-pink-50', 'border-pink-300');
    });
    element.classList.add('bg-pink-50', 'border-pink-300');
    showNotification(`Music track "${trackName}" selected`, 'success');
}

// Keyboard shortcuts
document.addEventListener('keydown', (e) => {
    // Space to play/pause when preview is visible
    if (e.code === 'Space' && uploadedImage && document.activePreview?.classList.contains('hidden')) {
        e.preventDefault();
        togglePlay();
    }
    
    // ESC to close/cancel
    if (e.code === 'Escape' && isRecording) {
        toggleRecording();
    }
    
    // G to generate
    if (e.code === 'KeyG' && e.ctrlKey) {
        e.preventDefault();
        generateLipSync();
    }
});