// API base URL
const API_BASE = '';

// DOM elements
const videoForm = document.getElementById('videoForm');
const scenesContainer = document.getElementById('scenesContainer');
const addSceneBtn = document.getElementById('addScene');
const statusDiv = document.getElementById('status');
const videosListDiv = document.getElementById('videosList');

let sceneCount = 1;

// Add new scene
addSceneBtn.addEventListener('click', () => {
    sceneCount++;
    const sceneDiv = document.createElement('div');
    sceneDiv.className = 'scene';
    sceneDiv.innerHTML = `
        <div class="form-group">
            <label>Scene ${sceneCount} - Text to Narrate</label>
            <textarea class="scene-text input" rows="3" placeholder="Enter the narration text..." required></textarea>
        </div>
        <div class="form-group">
            <label>Search Keywords (comma separated)</label>
            <input type="text" class="scene-keywords input" placeholder="nature, forest, trees" required>
        </div>
    `;
    scenesContainer.appendChild(sceneDiv);
});

// Submit form
videoForm.addEventListener('submit', async (e) => {
    e.preventDefault();
    
    // Gather scenes
    const scenes = Array.from(document.querySelectorAll('.scene')).map(scene => {
        const text = scene.querySelector('.scene-text').value;
        const keywords = scene.querySelector('.scene-keywords').value;
        return {
            text,
            searchTerms: keywords.split(',').map(k => k.trim()).filter(k => k)
        };
    });
    
    // Gather config
    const config = {
        orientation: document.getElementById('orientation').value,
        voice: document.getElementById('voice').value,
        music: document.getElementById('music').value || null,
        musicVolume: document.getElementById('musicVolume').value,
        captionPosition: document.getElementById('captionPosition').value,
        paddingBack: 0
    };
    
    // Show processing status
    showStatus('Creating video... This may take a few minutes.', 'processing');
    
    try {
        const response = await fetch(`${API_BASE}/api/short-video`, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ scenes, config })
        });
        
        if (!response.ok) {
            throw new Error('Failed to create video');
        }
        
        const data = await response.json();
        const videoId = data.videoId;
        
        showStatus(`Video queued! ID: ${videoId}`, 'success');
        
        // Start polling for status
        pollVideoStatus(videoId);
        
        // Refresh video list
        setTimeout(loadVideos, 1000);
        
    } catch (error) {
        showStatus(`Error: ${error.message}`, 'error');
    }
});

// Poll video status
async function pollVideoStatus(videoId) {
    const maxAttempts = 120; // 10 minutes
    let attempts = 0;
    
    const interval = setInterval(async () => {
        attempts++;
        
        if (attempts > maxAttempts) {
            clearInterval(interval);
            showStatus('Video processing timeout', 'error');
            return;
        }
        
        try {
            const response = await fetch(`${API_BASE}/api/short-video/${videoId}/status`);
            const data = await response.json();
            
            if (data.status === 'ready') {
                clearInterval(interval);
                showStatus('Video ready! Check your videos list below.', 'success');
                loadVideos();
            } else if (data.status === 'failed') {
                clearInterval(interval);
                showStatus('Video processing failed', 'error');
                loadVideos();
            }
        } catch (error) {
            console.error('Error polling status:', error);
        }
    }, 5000); // Poll every 5 seconds
}

// Show status message
function showStatus(message, type) {
    statusDiv.textContent = message;
    statusDiv.className = `status ${type}`;
    statusDiv.classList.remove('hidden');
}

// Load videos list
async function loadVideos() {
    try {
        const response = await fetch(`${API_BASE}/api/short-videos`);
        const data = await response.json();
        
        if (data.videos.length === 0) {
            videosListDiv.innerHTML = '<p class="loading">No videos yet. Create one above!</p>';
            return;
        }
        
        videosListDiv.innerHTML = data.videos.map(video => `
            <div class="video-card">
                <h3>Video ID: ${video.id}</h3>
                <span class="video-status ${video.status}">${video.status.toUpperCase()}</span>
                <div class="video-actions">
                    ${video.status === 'ready' ? `
                        <a href="${API_BASE}/api/short-video/${video.id}" download class="btn btn-primary">Download</a>
                    ` : ''}
                    <button onclick="deleteVideo('${video.id}')" class="btn btn-secondary">Delete</button>
                </div>
            </div>
        `).join('');
        
    } catch (error) {
        console.error('Error loading videos:', error);
        videosListDiv.innerHTML = '<p class="loading">Error loading videos</p>';
    }
}

// Delete video
async function deleteVideo(videoId) {
    if (!confirm('Are you sure you want to delete this video?')) {
        return;
    }
    
    try {
        await fetch(`${API_BASE}/api/short-video/${videoId}`, {
            method: 'DELETE'
        });
        loadVideos();
    } catch (error) {
        alert('Error deleting video');
    }
}

// Load videos on page load
loadVideos();

// Auto-refresh videos list every 10 seconds
setInterval(loadVideos, 10000);