/**** 
* Classes
****/ 
// Apple class
var Apple = Container.expand(function () {
	var self = Container.call(this);
	var appleGraphics = self.attachAsset('apple', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
});
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -10;
	self.move = function () {
		self.y += self.speed;
	};
});
// Assets are automatically created based on usage in the code.
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.move = function (x, y) {
		self.x = x;
		self.y = y;
	};
	self.shoot = function () {
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y - 50; // Shoot from above the player
		game.addChild(bullet);
		bullets.push(bullet);
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000 // Init game with black background 
});

/**** 
* Game Code
****/ 
var player = game.addChild(new Player());
player.x = 1024; // Center horizontally
player.y = 2500; // Position towards the bottom
var bullets = [];
var apples = [];
// Touch event to move player and shoot
game.on('down', function (obj) {
	var pos = obj.event.getLocalPosition(game);
	player.move(pos.x, pos.y);
	player.shoot();
});
// Game tick event
LK.on('tick', function () {
	// Spawn apples
	if (LK.ticks % 60 == 0) {
		// Every 60 ticks
		var apple = new Apple();
		apple.x = Math.random() * 2048; // Random horizontal position
		apple.y = 0; // Spawn at the top of the screen
		game.addChild(apple);
		apples.push(apple);
	}
	// Move bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].move();
		if (bullets[i].y < 0) {
			bullets[i].destroy();
			bullets.splice(i, 1);
		}
	}
	// Move apples
	for (var i = apples.length - 1; i >= 0; i--) {
		apples[i].move();
		if (apples[i].y > 2732) {
			// If apple has reached the bottom of the screen
			apples[i].destroy();
			apples.splice(i, 1);
		}
		// Check for collision with bullets
		for (var j = bullets.length - 1; j >= 0; j--) {
			if (apples[i].intersects(bullets[j])) {
				// Destroy both the apple and the bullet
				apples[i].destroy();
				apples.splice(i, 1);
				bullets[j].destroy();
				bullets.splice(j, 1);
				// Update score
				LK.setScore(LK.getScore() + 1);
				break;
			}
		}
		// Check for collision with player
		if (apples[i].intersects(player)) {
			// Game over
			LK.showGameOver();
			break;
		}
	}
});