import javax.sound.midi.*;
import java.util.ArrayList;

public class GuitarChordSequence2 {   // this is the first one
    
    public static void main(String[] args) {
	
	GuitarTuning gt = new GuitarTuning();
	
	ArrayList<Integer> eMajor = new ArrayList<Integer>();
	
	eMajor.add(gt.midiNum(6,0));
	eMajor.add(gt.midiNum(5,2));
	eMajor.add(gt.midiNum(4,2));
	eMajor.add(gt.midiNum(3,1));
	eMajor.add(gt.midiNum(2,0));
	eMajor.add(gt.midiNum(1,0));
	
	ArrayList<Integer> aMajor = new ArrayList<Integer>();
	
	aMajor.add(gt.midiNum(6,0));
	aMajor.add(gt.midiNum(5,0));
	aMajor.add(gt.midiNum(4,2));
	aMajor.add(gt.midiNum(3,2));
	aMajor.add(gt.midiNum(2,2));
	aMajor.add(gt.midiNum(1,0));
	
	
	ArrayList<ArrayList<Integer>> chords = new ArrayList<ArrayList<Integer>>();
	
	chords.add(eMajor); chords.add(aMajor); chords.add(eMajor); chords.add(aMajor);
	
	int instrument = 25; // SEE http://soundprogramming.net/file_formats/general_midi_instrument_list
	
	/* 25 Acoustic Guitar (nylon)
	   26 Acoustic Guitar (steel)
	   27 Electric Guitar (jazz)
	   28 Electric Guitar (clean)
	   29 Electric Guitar (muted)
	   30 Overdriven Guitar
	   31 Distortion Guitar
	   32 Guitar harmonics */
	
        GuitarChordSequence2 mini = new GuitarChordSequence2();
	
	if (args.length >= 1)
	    {
		instrument = Integer.parseInt(args[0]);
	    }
	mini.playChords(instrument, chords);
        
	System.exit(0);        
    }
    
    public void playChords(int instrument, ArrayList<ArrayList<Integer>> chords) {
	
	try {
	    
	    Sequencer player = MidiSystem.getSequencer();         
	    player.open();
	    
	    Sequence seq = new Sequence(Sequence.PPQ, 4);         
	    Track track = seq.createTrack();  
	    
	    MidiEvent event = null;
	    
	    ShortMessage first = new ShortMessage();
	    first.setMessage(192, 1, instrument, 0);
	    MidiEvent changeInstrument = new MidiEvent(first, 1); 
	    track.add(changeInstrument);
	    
	    final int beatDuration = 4; // how many beats to hold each chord 
	    
	    // c is for chord 
	    for (int c=0; c<chords.size(); c++) {
		
		// n is for note
		ArrayList<Integer> chord = chords.get(c);
		
		for (int n=0; n<chord.size(); n++) {
		    
		    ShortMessage a = new ShortMessage();
		    a.setMessage(ShortMessage.NOTE_ON, 1, chord.get(n), 100);
		    MidiEvent noteOn = new MidiEvent(a, 1+(c*beatDuration)); 
		    track.add(noteOn);
		}
		
		for (int n=0; n<chord.size(); n++) {
		    ShortMessage b = new ShortMessage();
		    b.setMessage(ShortMessage.NOTE_OFF, 1, chord.get(n), 100);
		    MidiEvent noteOff = new MidiEvent(b, (c+1)*beatDuration); 
		    track.add(noteOff);
		} // n for loop
	    } // c for loop
	    
	   
	    player.setSequence(seq); 
	    player.start();
	    Thread.sleep(5000);
	    player.close();
	    
	} catch (Exception ex) {ex.printStackTrace();}
    } // close play

} // close class