tiny_settlement_schule/src/main/java/view/sound/MusicManager.java

package view.sound;

import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.FloatControl;
import java.net.URL;
import java.util.EnumMap;

public class MusicManager {
    private static MusicManager instance;
    private Clip musicClip;


    private MusicManager() {
    }

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

    public void playBackgroundMusic(String resourcePath, boolean loop) {
        stop();
        if(loop){
            getBackgroundMusic(resourcePath).loop(Clip.LOOP_CONTINUOUSLY);
        }else{
            getBackgroundMusic(resourcePath).start();
        }
    }

    private Clip getBackgroundMusic(String resourcePath){
        try {
            URL musicURL = getClass().getClassLoader().getResource(resourcePath);
            if (musicURL == null) {
                System.err.println("Music file not found: " + resourcePath);
                return null;
            }

            AudioInputStream audioStream = AudioSystem.getAudioInputStream(musicURL);
            musicClip = AudioSystem.getClip();
            musicClip.open(audioStream);

            return musicClip;

        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public void setVolume(Clip clip, float percent) {
        if (clip != null && clip.isControlSupported(FloatControl.Type.MASTER_GAIN)) {

            FloatControl gainControl = (FloatControl) clip.getControl(FloatControl.Type.MASTER_GAIN);

            float min = gainControl.getMinimum(); // usually -80.0f
            float max = gainControl.getMaximum(); // usually 0.0f

            // Clamp percent to 0–100
            percent = Math.max(0, Math.min(100, percent));

            // Convert percent to gain value
            float range = max - min;
            float gain = (range * percent / 100f) + min;
            System.out.println("Set volume: " + gain + " dB for " + percent + "%");
            gainControl.setValue(gain); // Safe
        }
    }

    public void stop() {
        if (musicClip != null) {
            musicClip.stop();
            musicClip.close();
        }
    }

    public void setVolume(float volume) {
        setVolume(musicClip, volume);
    }
}