// Shared JavaScript across all pages
document.addEventListener('DOMContentLoaded', function() {
    // Sample playlist data
    const playlist = [
        {
            id: 1,
            title: "Bohemian Rhapsody",
            artist: "Queen",
            duration: "355",
            url: "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3"
        },
        {
            id: 2,
            title: "Blinding Lights",
            artist: "The Weeknd",
            duration: "200",
            url: "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-2.mp3"
        },
        {
            id: 3,
            title: "Shape of You",
            artist: "Ed Sheeran",
            duration: "233",
            url: "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-3.mp3"
        },
        {
            id: 4,
            title: "Dance Monkey",
            artist: "Tones and I",
            duration: "209",
            url: "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-4.mp3"
        },
        {
            id: 5,
            title: "Uptown Funk",
            artist: "Mark Ronson ft. Bruno Mars",
            duration: "270",
            url: "https://www.soundhelix.com/examples/mp3/SoundHelix-Song-5.mp3"
        }
    ];

    // DOM Elements
    const playBtn = document.getElementById('play-btn');
    const prevBtn = document.getElementById('prev-btn');
    const nextBtn = document.getElementById('next-btn');
    const playlistContainer = document.getElementById('playlist');
    const trackTitle = document.getElementById('track-title');
    const trackArtist = document.getElementById('track-artist');
    const currentTimeEl = document.getElementById('current-time');
    const totalTimeEl = document.getElementById('total-time');
    const progressBar = document.getElementById('progress-bar');
    const vinyl = document.querySelector('.w-64.h-64');
    const needle = document.getElementById('vinyl-needle');

    // Player state
    let currentTrackIndex = 0;
    let isPlaying = false;
    let sound = null;

    // Initialize playlist
    function initPlaylist() {
        playlistContainer.innerHTML = '';
        playlist.forEach((track, index) => {
            const item = document.createElement('div');
            item.className = `playlist-item p-3 rounded-lg cursor-pointer ${index === currentTrackIndex ? 'active' : ''}`;
            item.innerHTML = `
                <div class="flex justify-between items-center">
                    <div>
                        <div class="font-medium">${track.title}</div>
                        <div class="text-sm text-gray-400">${track.artist}</div>
                    </div>
                    <div class="text-sm text-gray-400">${formatTime(track.duration)}</div>
                </div>
            `;
            item.addEventListener('click', () => {
                playTrack(index);
            });
            playlistContainer.appendChild(item);
        });
    }

    // Play track
    function playTrack(index) {
        // Stop current sound if playing
        if (sound) {
            sound.stop();
        }

        // Update current track index
        currentTrackIndex = index;

        // Update UI
        const track = playlist[currentTrackIndex];
        trackTitle.textContent = track.title;
        trackArtist.textContent = track.artist;
        totalTimeEl.textContent = formatTime(track.duration);
        
        // Update playlist active item
        document.querySelectorAll('.playlist-item').forEach((item, i) => {
            if (i === currentTrackIndex) {
                item.classList.add('active');
            } else {
                item.classList.remove('active');
            }
        });

        // Create new sound
        sound = new Howl({
            src: [track.url],
            html5: true,
            onplay: function() {
                isPlaying = true;
                updatePlayButton();
                rotateVinyl(true);
                moveNeedle(true);
                requestAnimationFrame(updateProgress);
            },
            onpause: function() {
                isPlaying = false;
                updatePlayButton();
                rotateVinyl(false);
                moveNeedle(false);
            },
            onend: function() {
                isPlaying = false;
                updatePlayButton();
                rotateVinyl(false);
                moveNeedle(false);
                nextTrack();
            }
        });

        // Play the sound
        sound.play();
    }

    // Toggle play/pause
    function togglePlay() {
        if (sound) {
            if (isPlaying) {
                sound.pause();
            } else {
                sound.play();
            }
        } else {
            playTrack(currentTrackIndex);
        }
    }

    // Next track
    function nextTrack() {
        currentTrackIndex = (currentTrackIndex + 1) % playlist.length;
        playTrack(currentTrackIndex);
    }

    // Previous track
    function prevTrack() {
        currentTrackIndex = (currentTrackIndex - 1 + playlist.length) % playlist.length;
        playTrack(currentTrackIndex);
    }

    // Update play button icon
    function updatePlayButton() {
        const playIcon = playBtn.querySelector('i');
        if (isPlaying) {
            playIcon.setAttribute('data-feather', 'pause');
        } else {
            playIcon.setAttribute('data-feather', 'play');
        }
        feather.replace();
    }

    // Rotate vinyl
    function rotateVinyl(playing) {
        if (playing) {
            vinyl.classList.add('vinyl-rotation', 'vinyl-playing');
            vinyl.classList.remove('vinyl-paused');
        } else {
            vinyl.classList.remove('vinyl-playing');
            vinyl.classList.add('vinyl-paused');
        }
    }

    // Move needle
    function moveNeedle(playing) {
        if (playing) {
            needle.style.transform = 'rotate(0deg)';
        } else {
            needle.style.transform = 'rotate(-30deg)';
        }
    }

    // Update progress bar
    function updateProgress() {
        if (!sound) return;
        
        const seek = sound.seek() || 0;
        const duration = sound.duration();
        const progress = (seek / duration) * 100;
        
        progressBar.style.width = `${progress}%`;
        currentTimeEl.textContent = formatTime(Math.floor(seek));
        
        if (isPlaying) {
            requestAnimationFrame(updateProgress);
        }
    }

    // Format time (seconds to mm:ss)
    function formatTime(seconds) {
        const mins = Math.floor(seconds / 60);
        const secs = seconds % 60;
        return `${mins}:${secs < 10 ? '0' : ''}${secs}`;
    }

    // Event listeners
    playBtn.addEventListener('click', togglePlay);
    nextBtn.addEventListener('click', nextTrack);
    prevBtn.addEventListener('click', prevTrack);

    // Initialize
    initPlaylist();
    updatePlayButton();
});