package app;

import Core.AudioEngine;
import Strategies.IPlayStrategy;
import device.IAudioOutputDevice;
import enums.OutputDeviceType;
import enums.PlayStrategyType;
import managers.OutputDeviceManager;
import managers.PlaylistManager;
import managers.StrategyManager;
import models.Song;
import models.Playlist;

public class MusicPlayerFacade {
    private static MusicPlayerFacade instance = null;
    private AudioEngine audioEngine;
    private IPlayStrategy currentPlayStrategy;
    private IAudioOutputDevice currentOutputDevice;
    private StrategyManager strategyManager;
    private Playlist currentPlaylist;

    private MusicPlayerFacade() {
        audioEngine = new AudioEngine();
    }

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

    public void connectDevice(OutputDeviceType deviceType) {
        OutputDeviceManager.getInstance().connect(deviceType);
        currentOutputDevice = OutputDeviceManager.getInstance().getCurrentOutputDevice();
    }

    public void setStrategy(PlayStrategyType strategyType) {
        strategyManager = StrategyManager.getInstance();
        currentPlayStrategy = strategyManager.getStrategy(strategyType);
    }

    public void loadPlayList(String playlistName) {
        currentPlaylist = PlaylistManager.getInstance().getPlaylist(playlistName);
        if (currentPlaylist == null) {
            System.out.println("Playlist not found: " + playlistName);
        }
        currentPlayStrategy.setPlayList(currentPlaylist);
    }

    public void playPlaylist() {
        if (currentPlaylist == null) {
            System.out.println("No playlist loaded.");
            return;
        }
        while (currentPlayStrategy.hasNext()) {
            Song songToPlay = currentPlayStrategy.next();
            playSong(songToPlay);
        }
    }

    public void playSong(Song song) {
        if (currentOutputDevice == null) {
            System.out.println("No output device connected.");
            return;
        }
        audioEngine.play(currentOutputDevice, song);
    }

    public void pauseSong(Song song) {
        if (audioEngine.getCurrentSongTitle().equals(song.getName())) {
            audioEngine.pause();
        } else {
            System.out.println("The song is not currently playing.");
        }
    }
}