/****
* Classes
****/
// The assets will be automatically created and loaded by the LK engine
// Bird class
var Bird = Container.expand(function () {
  var self = Container.call(this);
  var birdGraphics = self.attachAsset('bird', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 0;
  self.gravity = 0.5;
  self.update = function () {
    self.y += self.speed;
    self.speed += self.gravity;
    if (self.y > 2732) {
      self.y = 2732;
      self.speed = 0;
    }
    if (self.y < 0) {
      self.y = 0;
      self.speed = 0;
    }
  };
  self.flap = function () {
    self.speed = -10;
  };
});
// Wall class
var Wall = Container.expand(function () {
  var self = Container.call(this);
  var wallGraphics = self.attachAsset('wall', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -5;
  self.update = function () {
    self.x += self.speed;
    if (self.x < -100) {
      self.destroy();
    }
  };
});

/****
* Initialize Game
****/
var game = new LK.Game({
  backgroundColor: 0x87CEEB // Sky blue background
});

/****
* Game Code
****/
var bird = game.addChild(new Bird());
bird.x = 512;
bird.y = 1366;
var walls = [];
game.update = function () {
  if (LK.ticks % 120 == 0) {
    var gapPosition = Math.random() * (2048 - 400) + 200;
    var topWall = game.addChild(new Wall());
    topWall.x = 2732;
    topWall.y = gapPosition - 600;
    var bottomWall = game.addChild(new Wall());
    bottomWall.x = 2732;
    bottomWall.y = gapPosition + 600;
    walls.push(topWall);
    walls.push(bottomWall);
  }
  for (var i = walls.length - 1; i >= 0; i--) {
    if (walls[i].x < -100) {
      walls[i].destroy();
      walls.splice(i, 1);
    } else if (bird.intersects(walls[i])) {
      LK.showGameOver();
    }
  }
};
game.down = function (x, y, obj) {
  bird.flap();
};