import java.io.*;
import java.util.*;

class MusicEdit {
 public  static PrintStream out;
 private static ArrayList song;
 private static int offset=0;
 private static ListIterator i;

 static void main (String[] args) throws IOException {
  boolean power = true;
    out = new PrintStream(new FileOutputStream("/dev/tty2"), true);
    song = new ArrayList();
    offset = 0;

    // ADD A FEW NOTES TO THE SONG ARRAYLIST
    song.add(new Note(24,256));
    song.add(new Note(36,256));
    song.add(new Note(26,256));
    song.add(new Note(28,256));
    song.add(new Note(36,256));
    song.add(new Note(28,256));
    song.add(new Note(26,256));
    song.add(new Note(24,256));
    song.add(new Note(36,256));

    while (power) {
      if (System.in.available()>0) {
        switch (System.in.read()) {
         case 'l' :
            if (++offset == song.size()) {
               offset--;
               System.out.print("]");
            } else {
               ((Note)(song.get(offset))).play();
            }
            break;
         case 'h' :
            if (--offset < 0) {
               offset++;
               System.out.print("[");
            } else {
               ((Note)(song.get(offset))).play();
            }
            break;
         case 'k' :
            ((Note)(song.get(offset))).higher();
            ((Note)(song.get(offset))).play();
            break;
         case 'j' :
            ((Note)(song.get(offset))).lower();
            ((Note)(song.get(offset))).play();
            break;
         case 'K' :
            ((Note)(song.get(offset))).longer();
            ((Note)(song.get(offset))).play();
            break;
         case 'J' :
            ((Note)(song.get(offset))).shorter();
            ((Note)(song.get(offset))).play();
            break;
         case ' ' : playSong(); break;
         case 'Q' : power = false; break;
        }
      } else {
        try { Thread.sleep(100); } catch (InterruptedException e) {}
      }
    }

 }

 // PLAY THE ENTIRE SONG IN THE ARRYLIST
 static void playSong () {
    i=song.listIterator();
    while(i.hasNext()) {
       ((Note)i.next()).play();
    }
 }

}


class Note {
 int note, duration;
 final int BASE = 20;

   Note (int note, int duration) {
     this.note = note;
     this.duration = duration;
   }

   public void play () {
    if (note > 0) {
       MusicEdit.out.print("\033[10;" +
                             Math.round(BASE * Math.pow(2.0,note / 12.0)) +
                             "]\033[11;" + duration + "]");
    }
    try { Thread.sleep(duration); } catch (InterruptedException e) {}
   }

   public Note higher () { note++; return this;}
   public Note lower () { note--; return this;}
   public Note longer () { duration *= 2; return this;}
   public Note shorter () { duration /= 2; return this;}
}