/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self._move_migrated = function () {
		self.x += (Math.random() - 0.5) * 5;
		self.y += (Math.random() - 0.5) * 5;
	};
	self.shoot = function () {
		var enemyBullet = new EnemyBullet();
		enemyBullet.x = self.x;
		enemyBullet.y = self.y;
		return enemyBullet;
	};
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self._move_migrated = function () {
		self.y += 10;
	};
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.vx = 0;
	self.vy = 0;
	self.friction = 0.95;
	self.speed = 10;
	self.poweredUp = false;
	self.powerUpDuration = 0;
	self._move_migrated = function (x, y) {
		var dx = x - self.x;
		var dy = y - self.y;
		var angle = Math.atan2(dy, dx);
		self.vx = Math.cos(angle) * (self.poweredUp ? self.speed * 2 : self.speed);
		self.vy = Math.sin(angle) * (self.poweredUp ? self.speed * 2 : self.speed);
	};
	self.shoot = function () {
		var heroBullet = new HeroBullet();
		heroBullet.x = self.x;
		heroBullet.y = self.y;
		return heroBullet;
	};
	self.spawnPowerUp = function () {
		var powerUp = new PowerUp();
		powerUp.x = self.x;
		powerUp.y = self.y;
		return powerUp;
	};
});
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('heroBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self._move_migrated = function () {
		self.y -= 10;
	};
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerUp', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self._move_migrated = function () {
		self.y -= 5;
	};
});

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

/**** 
* Game Code
****/ 
var hero = game.addChild(new Hero());
var enemies = [];
var heroBullets = [];
var enemyBullets = [];
hero.x = 2048 / 2;
hero.y = 2732 / 2;
for (var i = 0; i < 5; i++) {
	var enemy = new Enemy();
	enemy.x = Math.random() * 2048;
	enemy.y = Math.random() * 2732;
	enemies.push(enemy);
	game.addChild(enemy);
}
LK.on('tick', function () {
	game.on('move', function (x, y, obj) {
		var pos = game.toLocal(obj.global);
		hero._move_migrated(pos.x, pos.y);
	});
	hero.x += hero.vx;
	hero.y += hero.vy;
	hero.vx *= hero.friction;
	hero.vy *= hero.friction;
	enemies.forEach(function (enemy) {
		enemy._move_migrated();
	});
	heroBullets.forEach(function (bullet) {
		bullet._move_migrated();
	});
	enemyBullets.forEach(function (bullet) {
		bullet._move_migrated();
	});
	if (LK.ticks % 60 == 0) {
		var heroBullet = hero.shoot();
		heroBullets.push(heroBullet);
		game.addChild(heroBullet);
		enemies.forEach(function (enemy) {
			var enemyBullet = enemy.shoot();
			enemyBullets.push(enemyBullet);
			game.addChild(enemyBullet);
		});
	}
	if (LK.ticks % 300 == 0) {
		var powerUp = hero.spawnPowerUp();
		game.addChild(powerUp);
	}
	if (hero.poweredUp) {
		hero.powerUpDuration--;
		if (hero.powerUpDuration <= 0) {
			hero.poweredUp = false;
		}
	}
	heroBullets.forEach(function (bullet) {
		if (bullet.intersects(hero)) {
			hero.poweredUp = true;
			hero.powerUpDuration = 300;
			bullet.destroy();
		}
	});
	game.children.forEach(function (child) {
		if (child instanceof PowerUp && child.intersects(hero)) {
			hero.poweredUp = true;
			hero.powerUpDuration = 300;
			child.destroy();
		}
	});
});