/**** 
* Classes
****/ 
var Background = Container.expand(function () {
	var self = Container.call(this);
	var bgGraphics = self.attachAsset('background', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -1;
	self.update = function () {
		self.x += self.speed;
		if (self.x <= -2048) {
			self.x = 2048;
		}
	};
});
//<Assets used in the game will automatically appear here>
// Define the FlappyBird class
var FlappyBird = Container.expand(function () {
	var self = Container.call(this);
	// Create and attach the bird asset
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocity = 0;
	self.gravity = 0.5;
	self.lift = -10;
	// Update function for the bird
	self.update = function () {
		self.velocity += self.gravity;
		self.y += self.velocity;
		// Prevent the bird from going off the screen
		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;
		}
	};
	// Function to make the bird jump
	self.jump = function () {
		self.velocity = self.lift;
		LK.getSound('jump').play();
	};
});
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
****/ 
// Initialize game variables
var bird;
var score = 0;
var scoreTxt;
var pipes = [];
function createPipe() {
	var pipe = new Pipe();
	pipe.x = 2048;
	var pipeGraphics = LK.getAsset('pipe', {});
	pipe.y = Math.random() < 0.5 ? 0 : 2732 - pipeGraphics.height;
	pipes.push(pipe);
	game.addChild(pipe);
}
// Function to handle game over
function gameOver() {
	LK.effects.flashScreen(0xff0000, 1000);
	LK.showGameOver();
}
// Initialize the background
var background1 = new Background();
background1.x = 2048 / 2;
background1.y = 2732 / 2;
game.addChild(background1);
var background2 = new Background();
background2.x = 2048 + 2048 / 2;
background2.y = 2732 / 2;
game.addChild(background2);
// Initialize the bird
bird = new FlappyBird();
bird.x = 2048 / 4;
bird.y = 2732 / 2;
game.addChild(bird);
// Initialize the score text
scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Set up the game update function
game.update = function () {
	background1.update();
	background2.update();
	bird.update();
	for (var i = pipes.length - 1; i >= 0; i--) {
		pipes[i].update();
		if (bird.intersects(pipes[i])) {
			gameOver();
		}
		if (pipes[i].x < -pipes[i].width / 2) {
			pipes.splice(i, 1);
		}
	}
	if (LK.ticks % 90 == 0) {
		createPipe();
	}
};
// Set up the game down event to make the bird jump
game.down = function (x, y, obj) {
	bird.jump();
};