/****
* Classes
****/
//<Assets used in the game will automatically appear here>
// Define the FlappyBird class
var FlappyBird = Container.expand(function () {
  var self = Container.call(this);
  var birdGraphics = self.attachAsset('bird', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.velocity = 0;
  self.gravity = 0.5;
  self.flapStrength = -10;
  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.flapStrength;
  };
});
// Define the 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 < -wallGraphics.width / 2) {
      self.destroy();
    }
  };
});

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

/****
* Game Code
****/
var bird = game.addChild(new FlappyBird());
bird.x = 2048 / 4;
bird.y = 2732 / 2;
var walls = [];
var score = 0;
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnWall() {
  var gapHeight = 400;
  var gapPosition = Math.random() * (2732 - gapHeight) + gapHeight / 2;
  var topWall = new Wall();
  topWall.x = 2048 + 100;
  topWall.y = gapPosition - gapHeight / 2 - topWall.height / 2;
  walls.push(topWall);
  game.addChild(topWall);
  var bottomWall = new Wall();
  bottomWall.x = 2048 + 100;
  bottomWall.y = gapPosition + gapHeight / 2 + bottomWall.height / 2;
  walls.push(bottomWall);
  game.addChild(bottomWall);
}
game.down = function (x, y, obj) {
  bird.flap();
};
game.update = function () {
  bird.update();
  for (var i = walls.length - 1; i >= 0; i--) {
    walls[i].update();
    if (walls[i].intersects(bird)) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
    if (walls[i].x < bird.x && !walls[i].scored) {
      score++;
      scoreTxt.setText(score);
      walls[i].scored = true;
    }
  }
  if (LK.ticks % 90 == 0) {
    spawnWall();
  }
};