/****
* 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.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;
  };
});
// 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 / 2) {
      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;
var gameOver = false;
// Initialize bird
bird = game.addChild(new Bird());
bird.x = 2048 / 4;
bird.y = 2732 / 2;
// Initialize score text
scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Function to create pipes
function createPipes() {
  if (gameOver) return;
  var gap = 400;
  var pipeHeight = 800;
  var pipeY = Math.random() * (2732 - gap - pipeHeight) + pipeHeight / 2;
  var topPipe = new Pipe();
  topPipe.x = 2048 + topPipe.width / 2;
  topPipe.y = pipeY - gap / 2 - pipeHeight;
  pipes.push(topPipe);
  game.addChild(topPipe);
  var bottomPipe = new Pipe();
  bottomPipe.x = 2048 + bottomPipe.width / 2;
  bottomPipe.y = pipeY + gap / 2 + pipeHeight;
  pipes.push(bottomPipe);
  game.addChild(bottomPipe);
}
// Function to handle game over
function handleGameOver() {
  gameOver = true;
  LK.effects.flashScreen(0xff0000, 1000);
  LK.showGameOver();
}
// Game update function
game.update = function () {
  if (gameOver) return;
  bird.update();
  for (var i = pipes.length - 1; i >= 0; i--) {
    pipes[i].update();
    if (pipes[i].intersects(bird)) {
      handleGameOver();
    }
    if (pipes[i].x < bird.x && !pipes[i].scored) {
      score++;
      pipes[i].scored = true;
      scoreTxt.setText(score);
    }
  }
};
// Handle touch events
game.down = function (x, y, obj) {
  if (!gameOver) {
    bird.flap();
  }
};
// Start pipe creation interval
pipeInterval = LK.setInterval(createPipes, 2000);