var Explosion = Container.expand(function () {
	var self = Container.call(this);
	self.isActive = false;
	self.start = function () {
		self.isActive = true;
		var explosionAnimation = LK.getAsset('explosionAnimation', 'Explosion Animation', .5, .5);
		self.addChild(explosionAnimation);
		LK.setTimeout(function () {
			self.isActive = false;
			self.destroy();
		}, 500);
	};
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.createAsset('hero', 'Hero spaceship', .5, .5);
	self.move = function (x) {
		self.x = x;
		self.y = 2732 - 200;
	};
	self.shoot = function () {
		var bullet = new HeroBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		LK.setTimeout(function () {
			bullet.destroy();
		}, 3000);
		return bullet;
	};
});
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('heroBullet', 'Hero bullet', .5, .5);
	self.isActive = true;
	self.move = function () {
		self.y -= 20;
	};
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('enemy', 'Enemy spaceship', .5, .5);
	self.move = function () {
		self.y += 2;
		if (self.y > 2732) self.destroy();
		self.x += Math.sin(self.y / 50) * 5;
	};
	self.shoot = function () {};
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('enemyBullet', 'Enemy bullet', .5, .5);
	self.move = function () {};
});
var Asteroid = Container.expand(function () {
	var self = Container.call(this);
	var asteroidGraphics = self.createAsset('asteroid', 'Asteroid', .5, .5);
	self.direction = Math.random() * 2 - 1;
	self.move = function () {
		self.y += 5;
		self.x += self.direction;
	};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var fpsCounter = new Text2('FPS: 0', {
		size: 50,
		fill: '#ffffff',
		font: 'Arial Bold'
	});
	LK.gui.topLeft.addChild(fpsCounter);
	var scoreText = new Text2('Score: 0', {
		size: 50,
		fill: '#ffffff',
		font: 'Arial Bold'
	});
	LK.gui.topLeft.addChild(scoreText);
	scoreText.y = fpsCounter.height;
	var frameCount = 0;
	var lastTime = Date.now();
	LK.on('tick', function () {
		frameCount++;
		var currentTime = Date.now();
		var deltaTime = currentTime - lastTime;
		if (deltaTime >= 1000) {
			var fps = Math.round(frameCount / deltaTime * 1000);
			fpsCounter.setText('FPS: ' + fps);
			scoreText.setText('Score: ' + score);
			frameCount = 0;
			lastTime = currentTime;
		}
	});
	var score = 0;
	var heroes = [];
	var heroBullets = [];
	var enemies = [];
	var enemyBullets = [];
	var asteroids = [];
	var hero = self.addChild(new Hero());
	hero.x = 2048 / 2;
	hero.y = 2732 - 200;
	heroes.push(hero);
	stage.on('move', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		hero.move(pos.x);
	});
	stage.on('down', function (obj) {
		var bullet;
		bullet = hero.shoot();
		bullet.x = hero.x;
		bullet.y = hero.y;
		self.addChild(bullet);
		heroBullets.push(bullet);
	});
	for (var i = heroBullets.length - 1; i >= 0; i--) {
		if (heroBullets[i].y < 0) {
			heroBullets[i].destroy();
			heroBullets.splice(i, 1);
		}
	}
	var enemySpawnTimer = 0;
	var asteroidSpawnTimer = 0;
	LK.on('tick', function () {
		if (enemySpawnTimer++ % 100 == 0) {
			for (var i = 0; i < 10; i++) {
				var enemy;
				enemy = new Enemy();
				enemy.x = i * 180 + 150;
				enemy.y = 0;
				self.addChild(enemy);
				enemies.push(enemy);
			}
		}
		for (var i = enemies.length - 1; i >= 0; i--) {
			if (enemies[i].y > 2732) {
				enemies[i].destroy();
				enemies.splice(i, 1);
			}
		}
		if (asteroidSpawnTimer++ % 50 == 0) {
			var asteroid;
			asteroid = new Asteroid();
			asteroid.x = Math.random() * 2048;
			asteroid.y = 0;
			self.addChild(asteroid);
			asteroids.push(asteroid);
		}
		for (var i = 0; i < enemies.length; i++) {
			enemies[i].move();
			if (enemies[i].y >= hero.y) {
				LK.showGameOver();
			}
		}
		for (var i = asteroids.length - 1; i >= 0; i--) {
			asteroids[i].move();
			if (asteroids[i].y > 2732) {
				asteroids[i].destroy();
				asteroids.splice(i, 1);
			} else if (hero.intersects(asteroids[i])) {
				LK.showGameOver();
			}
		}
		for (var i = heroBullets.length - 1; i >= 0; i--) {
			heroBullets[i].move();
			if (heroBullets[i].y < 0 || heroBullets[i].y > 2732) {
				heroBullets[i].destroy();
				heroBullets.splice(i, 1);
				continue;
			}
			for (var n = 0; n < enemies.length; n++) {
				if (heroBullets[i] && heroBullets[i].intersects(enemies[n])) {
					var explosion = new Explosion();
					explosion.x = enemies[n].x;
					explosion.y = enemies[n].y;
					self.addChild(explosion);
					explosion.start();
					if (enemies[n]) {
						enemies[n].destroy();
						enemies.splice(n, 1);
					}
					heroBullets[i].destroy();
					heroBullets.splice(i, 1);
					score += 10;
					scoreText.setText('Score: ' + score);
					break;
				}
			}
		}
		for (var i = 0; i < enemyBullets.length; i++) {
			enemyBullets[i].move();
		}
	});
});