/****
* Classes
****/
//<Assets used in the game will automatically appear here>
// Bird class
var Bird = Container.expand(function () {
  var self = Container.call(this);
  var birdGraphics = self.attachAsset('bird', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speedY = 0;
  self.gravity = 0.5;
  self.flapStrength = -10;
  self.update = function () {
    self.speedY += self.gravity;
    self.y += self.speedY;
    // Check for collision with top and bottom of the screen
    if (self.y < 0) {
      self.y = 0;
      self.speedY = 0;
    } else if (self.y > 2732) {
      self.y = 2732;
      self.speedY = 0;
    }
  };
  self.flap = function () {
    self.speedY = self.flapStrength;
  };
});
// Wall class
var Wall = Container.expand(function () {
  var self = Container.call(this);
  var wallGraphics = self.attachAsset('wall', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speedX = -5;
  self.update = function () {
    self.x += self.speedX;
    // Remove wall if it goes off screen
    if (self.x < -wallGraphics.width) {
      self.destroy();
    }
  };
});

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

/****
* Game Code
****/
var bird = game.addChild(new Bird());
bird.x = 2048 / 2;
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 wall = new Wall();
  wall.x = 2048;
  wall.y = Math.random() * 2732;
  walls.push(wall);
  game.addChild(wall);
}
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();
    // Check for collision with bird
    if (bird.intersects(walls[i])) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
    // Remove wall if it goes off screen
    if (walls[i].x < -walls[i].width) {
      walls.splice(i, 1);
    }
  }
  // Increase score and update score text
  score += 1;
  scoreTxt.setText(score);
  // Spawn new wall every 100 ticks
  if (LK.ticks % 100 == 0) {
    spawnWall();
  }
};