// Video Player Application
document.addEventListener('DOMContentLoaded', function() {
    const video = document.getElementById('videoPlayer');
    const playlist = document.getElementById('playlist');
    const overlay = document.getElementById('videoOverlay');
    const currentTitle = document.getElementById('currentTitle');
    const playPauseBtn = document.getElementById('playPauseBtn');
    const prevBtn = document.getElementById('prevBtn');
    const nextBtn = document.getElementById('nextBtn');
    const muteBtn = document.getElementById('muteBtn');
    const volumeSlider = document.getElementById('volumeSlider');
    const fullscreenBtn = document.getElementById('fullscreenBtn');
    
    let videos = [];
    let currentIndex = -1;
    
    // Load playlist from API
    async function loadPlaylist() {
        try {
            const response = await fetch('/api/playlist');
            const data = await response.json();
            videos = data.videos;
            renderPlaylist();
        } catch (error) {
            console.error('Failed to load playlist:', error);
            playlist.innerHTML = `
                <div class="empty-playlist">
                    <span>❌</span>
                    <p>Failed to load playlist</p>
                </div>
            `;
        }
    }
    
    // Render playlist items
    function renderPlaylist() {
        if (videos.length === 0) {
            playlist.innerHTML = `
                <div class="empty-playlist">
                    <span>📭</span>
                    <p>No videos found in playlist folder</p>
                </div>
            `;
            return;
        }
        
        playlist.innerHTML = videos.map((video, index) => `
            <div class="playlist-item ${index === currentIndex ? 'active' : ''}" 
                 data-index="${index}" 
                 onclick="playVideo(${index})">
                <span class="item-icon">🎬</span>
                <div class="item-info">
                    <div class="item-title" title="${video.name}">${video.title}</div>
                    <div class="item-size">${video.size_human}</div>
                </div>
            </div>
        `).join('');
    }
    
    // Play video at index
    window.playVideo = function(index) {
        if (index < 0 || index >= videos.length) return;
        
        currentIndex = index;
        const videoData = videos[index];
        
        video.src = videoData.path;
        video.load();
        video.play().catch(e => console.log('Autoplay prevented:', e));
        
        currentTitle.textContent = videoData.title;
        overlay.classList.add('hidden');
        
        // Update playlist highlight
        document.querySelectorAll('.playlist-item').forEach((item, i) => {
            item.classList.toggle('active', i === index);
        });
        
        updatePlayPauseButton();
    };
    
    // Play/Pause toggle
    function togglePlayPause() {
        if (video.paused) {
            video.play().catch(e => console.log('Play failed:', e));
        } else {
            video.pause();
        }
    }
    
    // Update play/pause button icon
    function updatePlayPauseButton() {
        playPauseBtn.textContent = video.paused ? '▶' : '⏸';
    }
    
    // Play previous video
    function playPrevious() {
        if (videos.length === 0) return;
        const newIndex = currentIndex > 0 ? currentIndex - 1 : videos.length - 1;
        playVideo(newIndex);
    }
    
    // Play next video
    function playNext() {
        if (videos.length === 0) return;
        const newIndex = currentIndex < videos.length - 1 ? currentIndex + 1 : 0;
        playVideo(newIndex);
    }
    
    // Toggle mute
    function toggleMute() {
        video.muted = !video.muted;
        muteBtn.textContent = video.muted ? '🔇' : '🔊';
        volumeSlider.value = video.muted ? 0 : video.volume;
    }
    
    // Update volume
    function updateVolume() {
        video.volume = volumeSlider.value;
        video.muted = video.volume === 0;
        muteBtn.textContent = video.muted ? '🔇' : '🔊';
    }
    
    // Toggle fullscreen
    function toggleFullscreen() {
        const container = document.querySelector('.video-container');
        
        if (document.fullscreenElement) {
            document.exitFullscreen();
        } else if (container.requestFullscreen) {
            container.requestFullscreen();
        } else if (container.webkitRequestFullscreen) {
            container.webkitRequestFullscreen();
        }
    }
    
    // Event listeners
    playPauseBtn.addEventListener('click', togglePlayPause);
    prevBtn.addEventListener('click', playPrevious);
    nextBtn.addEventListener('click', playNext);
    muteBtn.addEventListener('click', toggleMute);
    volumeSlider.addEventListener('input', updateVolume);
    fullscreenBtn.addEventListener('click', toggleFullscreen);
    
    video.addEventListener('play', updatePlayPauseButton);
    video.addEventListener('pause', updatePlayPauseButton);
    video.addEventListener('ended', playNext);
    
    // Keyboard shortcuts
    document.addEventListener('keydown', function(e) {
        if (e.target.tagName === 'INPUT') return;
        
        switch(e.key) {
            case ' ':
            case 'k':
                e.preventDefault();
                togglePlayPause();
                break;
            case 'ArrowLeft':
                e.preventDefault();
                video.currentTime = Math.max(0, video.currentTime - 10);
                break;
            case 'ArrowRight':
                e.preventDefault();
                video.currentTime = Math.min(video.duration, video.currentTime + 10);
                break;
            case 'ArrowUp':
                e.preventDefault();
                video.volume = Math.min(1, video.volume + 0.1);
                volumeSlider.value = video.volume;
                break;
            case 'ArrowDown':
                e.preventDefault();
                video.volume = Math.max(0, video.volume - 0.1);
                volumeSlider.value = video.volume;
                break;
            case 'f':
                e.preventDefault();
                toggleFullscreen();
                break;
            case 'm':
                e.preventDefault();
                toggleMute();
                break;
            case 'n':
                e.preventDefault();
                playNext();
                break;
            case 'p':
                e.preventDefault();
                playPrevious();
                break;
        }
    });
    
    // Initialize
    loadPlaylist();
});