/****
* Classes
****/
// Bird class
var Bird = Container.expand(function () {
  var self = Container.call(this);
  var birdGraphics = self.attachAsset('bird', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.gravity = 0.5;
  self.lift = -10;
  self.velocity = 0;
  self.update = function () {
    self.velocity += self.gravity;
    self.y += self.velocity;
    if (self.y > 2732 - birdGraphics.height / 2) {
      self.y = 2732 - birdGraphics.height / 2;
      self.velocity = 0;
    }
    if (self.y < birdGraphics.height / 2) {
      self.y = birdGraphics.height / 2;
      self.velocity = 0;
    }
  };
  self.flap = function () {
    self.velocity = self.lift;
  };
});
//<Assets used in the game will automatically appear here>
// Pipe class
var Pipe = Container.expand(function () {
  var self = Container.call(this);
  var pipeGraphics = self.attachAsset('pipe', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -5;
  self.update = function () {
    self.x += self.speed;
    if (self.x < -pipeGraphics.width) {
      self.destroy();
    }
  };
});

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

/****
* Game Code
****/
var bird;
var pipes = [];
var score = 0;
var scoreTxt;
var pipeInterval;
function resetGame() {
  bird = game.addChild(new Bird());
  bird.x = 2048 / 4;
  bird.y = 2732 / 2;
  pipes.forEach(function (pipe) {
    pipe.destroy();
  });
  pipes = [];
  score = 0;
  scoreTxt.setText(score);
  if (pipeInterval) {
    LK.clearInterval(pipeInterval);
  }
  pipeInterval = LK.setInterval(function () {
    var pipeTop = new Pipe();
    var pipeBottom = new Pipe();
    var gap = 400;
    var pipeHeight = 800;
    var pipeY = Math.random() * (2732 - gap - pipeHeight * 2) + pipeHeight;
    pipeTop.x = 2048;
    pipeTop.y = pipeY - gap / 2 - pipeHeight;
    pipeBottom.x = 2048;
    pipeBottom.y = pipeY + gap / 2 + pipeHeight;
    pipes.push(pipeTop);
    pipes.push(pipeBottom);
    game.addChild(pipeTop);
    game.addChild(pipeBottom);
  }, 1500);
}
game.down = function (x, y, obj) {
  bird.flap();
};
game.update = function () {
  bird.update();
  pipes.forEach(function (pipe) {
    pipe.update();
    if (pipe.intersects(bird)) {
      LK.showGameOver();
    }
  });
  pipes = pipes.filter(function (pipe) {
    return pipe.parent;
  });
  if (pipes.length > 0 && pipes[0].x < bird.x && !pipes[0].scored) {
    score++;
    scoreTxt.setText(score);
    pipes[0].scored = true;
  }
};
scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
resetGame();