class Main {
  function void main() {
    var int c,position;
    var Board b;
    var char key;  // the key currently pressed by the user
    var boolean exit;
    var boolean gameend;

    let exit = false;
    let b = Board.new();

    do Draw.Grid();

    while(~exit) {
      while (key = 0) {
        let key = Keyboard.keyPressed();
        do Sys.wait(5); // wait 5ms
     }

     let position = -1;

     if (key = 81)  { let exit = true; }  // q
     if (key = 49)  { let position = 0; } // 1
     if (key = 50)  { let position = 1; }
     if (key = 51)  { let position = 2; }
     if (key = 52)  { let position = 3; }
     if (key = 53)  { let position = 4; }
     if (key = 54)  { let position = 5; }
     if (key = 55)  { let position = 6; }
     if (key = 56)  { let position = 7; }
     if (key = 57)  { let position = 8; } // 9

     if((key>48)&(key<58)) {
        let c = position - (3 * (position/3));
        let gameend = b.play(position/3, c);
        if (gameend) {
          do Screen.clearScreen();
          let c = b.winner();
          if(c = 1) {
            do Output.printString("Congratulations Player 1");
          }
          if (c = 2) {
            do Output.printString("Congratulations Player 2");
          }
          if (c = 0) {
            do Output.printString("It was a draw!");
          }
          let exit = true;
        }
        let key = 0;
     }
    }
    return;
  }
}