package cn.edu.caztc.sokobangame;

import javax.sound.sampled.*;
import java.io.File;

public class MusicPlayer {
    private static MusicPlayer instance;
    private Clip clip;
    private int currentTrackIndex = -1;
    private boolean isMuted = true;
    
    public int getCurrentTrackIndex() {
        return currentTrackIndex;
    }
    
    private MusicPlayer() {}

    public static synchronized MusicPlayer getInstance() {
        if (instance == null) {
            instance = new MusicPlayer();
        }
        return instance;
    }

    public void playMusic(int index) {
        if (index < 0 || index >= MapConfig.MUSIC_FILES.length) return;
        
        stopMusic();
        currentTrackIndex = index;
        isMuted = false;
        
        try {
            AudioInputStream audioInput = AudioSystem.getAudioInputStream(
                new File(MapConfig.MUSIC_PATH + MapConfig.MUSIC_FILES[index]));
            clip = AudioSystem.getClip();
            clip.open(audioInput);
            clip.loop(Clip.LOOP_CONTINUOUSLY);
            clip.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void stopMusic() {
        if (clip != null && clip.isRunning()) {
            clip.stop();
            clip.close();
        }
        isMuted = true;
    }

    public void toggleMute() {
        if (isMuted) {
            playMusic(currentTrackIndex);
        } else {
            stopMusic();
        }
    }

    public void nextTrack() {
        if (currentTrackIndex == -1) return;
        int newIndex = (currentTrackIndex + 1) % MapConfig.MUSIC_FILES.length;
        playMusic(newIndex);
    }

    public boolean isMuted() {
        return isMuted;
    }
}