/**** 
* Classes
****/
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = LK.getAsset('heroBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(bulletGraphics);
	self.speed = 10;
	self.move = function () {
		self.y -= self.speed;
	};
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = LK.getAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(bulletGraphics);
	self.speed = 5;
	self.move = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = LK.getAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(heroGraphics);
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = LK.getAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(enemyGraphics);
	self.speed = 6;
	self.targetY = Math.random() * (2732 / 3);
	self.move = function () {
		if (self.y < self.targetY) {
			self.y += self.speed;
		}
		self.x += Math.sin(LK.ticks / 30) * 5;
		if (self.x < 0) {
			self.x = 0;
		}
		if (self.x > 2048 - enemyGraphics.width) {
			self.x = 2048 - enemyGraphics.width;
		}
	};
});
var StarField = Container.expand(function () {
	var self = Container.call(this);
	var starGraphics = LK.getAsset('star', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(starGraphics);
	self.speed = Math.random() * 2 + 1;
	self.alpha = self.speed / 3;
	self.move = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.y = -100;
			self.x = Math.random() * 2048;
			self.speed = Math.random() * 2 + 1;
			self.alpha = self.speed / 3;
		}
	};
});

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

/**** 
* Game Code
****/
var starField = [];
for (var i = 0; i < 100; i++) {
	var star = new StarField();
	star.x = Math.random() * 2048;
	star.y = Math.random() * 2732;
	starField.push(star);
	game.addChild(star);
}
var hero = game.addChild(new Hero());
hero.x = 1024;
hero.y = 2400;
var enemies = [];
var heroBullets = [];
var enemyBullets = [];
var score = 0;
var currentWave = 0;
var allEnemiesKilled = true;
var scoreText = new Text2('0', {
	size: 100,
	font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
	fill: "#ffffff"
});
scoreText.anchor.set(0.5, 0);
LK.gui.topCenter.addChild(scoreText);
function spawnWave() {
	for (var i = 0; i < currentWave + 3; i++) {
		var enemy = new Enemy();
		enemy.x = Math.random() * 2048;
		enemy.y = -100 - i * 100;
		enemies.push(enemy);
		game.addChild(enemy);
	}
	allEnemiesKilled = false;
}
function fireHeroBullet() {
	var bullet = new HeroBullet();
	bullet.x = hero.x;
	bullet.y = hero.y - 50;
	heroBullets.push(bullet);
	game.addChild(bullet);
}
function fireEnemyBullet(enemy) {
	var bullet = new EnemyBullet();
	bullet.x = enemy.x;
	bullet.y = enemy.y + 50;
	var angle = Math.atan2(hero.y - bullet.y, hero.x - bullet.x);
	bullet.speedX = bullet.speed * Math.cos(angle);
	bullet.speedY = bullet.speed * Math.sin(angle);
	enemyBullets.push(bullet);
	game.addChild(bullet);
}
function updateGameObjects() {
	enemies.forEach(function (enemy, index) {
		enemy.move();
		if (enemy.y > 2732) {
			enemy.destroy();
			enemies.splice(index, 1);
		}
	});
	heroBullets.forEach(function (bullet, index) {
		bullet.move();
		if (bullet.y < 0) {
			bullet.destroy();
			heroBullets.splice(index, 1);
		}
	});
	enemyBullets.forEach(function (bullet, index) {
		bullet.move();
		if (bullet.y > 2732) {
			bullet.destroy();
			enemyBullets.splice(index, 1);
		}
	});
}
function checkCollisions() {
	// Check collisions between hero bullets and enemies
	heroBullets.forEach(function (heroBullet, hIndex) {
		enemies.forEach(function (enemy, eIndex) {
			if (heroBullet.intersects(enemy)) {
				heroBullet.destroy();
				heroBullets.splice(hIndex, 1);
				enemy.destroy();
				enemies.splice(eIndex, 1);
				score += 100;
				LK.setScore(score);
				scoreText.setText(score);
				if (enemies.length === 0) {
					allEnemiesKilled = true;
				}
			}
		});
	});
	// Check collisions between enemy bullets and hero
	enemyBullets.forEach(function (enemyBullet, index) {
		if (enemyBullet.intersects(hero)) {
			enemyBullet.destroy();
			enemyBullets.splice(index, 1);
			LK.showGameOver();
			// Handle hero hit by enemy bullet
		}
	});
}
var targetPosition = {
	x: hero.x,
	y: hero.y
};
game.on('down', function (obj) {
	targetPosition = obj.event.getLocalPosition(game);
});
game.on('move', function (obj) {
	targetPosition = obj.event.getLocalPosition(game);
});
function moveHeroTowardsTarget() {
	var dx = targetPosition.x - hero.x;
	var dy = targetPosition.y - hero.y;
	var distance = Math.sqrt(dx * dx + dy * dy);
	var maxSpeed = 15;
	if (distance > maxSpeed) {
		var angle = Math.atan2(dy, dx);
		hero.x += maxSpeed * Math.cos(angle);
		hero.y += maxSpeed * Math.sin(angle);
	} else {
		hero.x = targetPosition.x;
		hero.y = targetPosition.y;
	}
}
function handleTick() {
	moveHeroTowardsTarget();
	updateGameObjects();
	checkCollisions();
	starField.forEach(function (star) {
		star.move();
	});
	if (allEnemiesKilled) {
		currentWave++;
		spawnWave();
	}
	if (LK.ticks % 30 === 0) {
		fireHeroBullet();
	}
	enemies.forEach(function (enemy, index) {
		if (LK.ticks % 90 === 0) {
			fireEnemyBullet(enemy);
		}
		if (LK.ticks % 180 === 0 && index % 2 === 0) {
			fireEnemyBullet(enemy);
		}
	});
}
LK.on('tick', handleTick);