/****
* Classes
****/
// The assets will be automatically created and loaded by the LK engine.
// Bubble class
var Bubble = Container.expand(function () {
  var self = Container.call(this);
  var bubbleGraphics = self.attachAsset('bubble', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.update = function () {
    self.y -= 2;
    if (self.y < -50) {
      self.destroy();
    }
  };
  self.down = function (x, y, obj) {
    LK.setScore(LK.getScore() + 1);
    self.destroy();
  };
});

/****
* Initialize Game
****/
var game = new LK.Game({
  backgroundColor: 0x000000 // Init game with black background 
});

/****
* Game Code
****/
// Initialize score display
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Initialize bubble array
var bubbles = [];
// Game update function
game.update = function () {
  // Update score display
  scoreTxt.setText(LK.getScore());
  // Create new bubbles
  if (LK.ticks % 30 == 0) {
    var newBubble = new Bubble();
    newBubble.x = Math.random() * 2048;
    newBubble.y = 2732;
    bubbles.push(newBubble);
    game.addChild(newBubble);
  }
  // Remove bubbles that have moved off screen
  for (var i = bubbles.length - 1; i >= 0; i--) {
    if (bubbles[i].y < -50) {
      bubbles[i].destroy();
      bubbles.splice(i, 1);
    }
  }
};