package sign;

import java.util.Queue;
import java.util.LinkedList;
import java.io.File;
import javax.sound.midi.*;

public class PlayMusicInOrder {

    final Sequencer seq;
    private Queue<String> song_queue;

    public PlayMusicInOrder (Queue<String> song_queue) {
        Sequencer seq = null;
        try{
            seq = MidiSystem.getSequencer();
            seq.addMetaEventListener( new MetaEventListener()
            {
                public void meta(MetaMessage msg){
                    if(msg.getType()==0x2F)
                    {
                        PlayMusicInOrder.this.play_next_song();
                    }
                }
            });
        }
        catch (Exception e){}
        this.seq=seq;
        this.song_queue=song_queue;

    }

    private void play_next_song(){
        String next_song = song_queue.remove();
        System.out.printf("Creating sequence for %s", next_song);
        try{
            Sequence sequence = MidiSystem.getSequence(new File(next_song));
            this.seq.setSequence(sequence);
            System.out.println("Playing");
            this.seq.start();}
        catch(Exception e){
            System.out.println("Error!");
            e.printStackTrace();
            play_next_song();
        }
    }
    public void start_playing () {
        try{this.seq.open();}catch(Exception e){}
        System.out.println("Starting to play");
        this.play_next_song();
    }
    public static void play(){
        Queue<String> song_queue = new LinkedList<String>();
        PlayMusicInOrder.add_midi_files(song_queue,new File( "C:\\Users\\Kyle\\Desktop\\clieent\\Client\\cache\\Music\\"));
        System.out.println("Songs added!");
        PlayMusicInOrder player = new PlayMusicInOrder (song_queue);
        player.start_playing();
    };

    public static void add_midi_files(Queue<String> queue, File top_dir){
        try {
            for (File f: top_dir.listFiles())
                if (f.isDirectory()) {
                    add_midi_files(queue, f);
                } else if (f.isFile())
                {
                    System.out.println(f);
                    queue.add(f.getAbsolutePath());
                }
                else
                {}
        } catch (NullPointerException e) {
            e.printStackTrace();
        }
    }
}