/**** 
* Classes
****/ 
// Alien class
var Alien = Container.expand(function () {
	var self = Container.call(this);
	var alienGraphics = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.update = function () {
		self.y += self.speed;
	};
});
// Asteroid class
var Asteroid = Container.expand(function () {
	var self = Container.call(this);
	var asteroidGraphics = self.attachAsset('asteroid', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = 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 = -15;
	self.update = function () {
		self.y += self.speed;
	};
});
// NewEnemy class
var NewEnemy = Container.expand(function () {
	var self = Container.call(this);
	var newEnemyGraphics = self.attachAsset('new_enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.update = function () {
		self.y += self.speed;
		// Randomly shoot bullets less often
		if (Math.random() < 0.005) {
			var newEnemyBullet = new NewEnemyBullet();
			newEnemyBullet.x = self.x;
			newEnemyBullet.y = self.y;
			game.addChild(newEnemyBullet);
			// Play the enemy_laser_shot sound
			LK.getSound('enemy_laser_shot').play();
		}
	};
});
// NewEnemyBullet class
var NewEnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var newEnemyBulletGraphics = self.attachAsset('new_enemy_bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 15;
	self.update = function () {
		self.y += self.speed;
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Spaceship class
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var spaceshipGraphics = self.attachAsset('spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		// Spaceship update logic
	};
});

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

/**** 
* Game Code
****/ 
var background = game.addChild(LK.getAsset('background_image', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 2732 / 2,
	scaleX: 2048 / 2000,
	scaleY: 2732 / 2000
}));
// Initialize game elements
var spaceship = game.addChild(new Spaceship());
spaceship.x = 2048 / 2;
spaceship.y = 2732 - 200;
var asteroids = [];
var aliens = [];
var bullets = [];
// Game update logic
game.update = function () {
	// Update spaceship
	spaceship.update();
	// Update asteroids
	for (var i = asteroids.length - 1; i >= 0; i--) {
		var asteroid = asteroids[i];
		asteroid.update();
		if (asteroid.y > 2732) {
			asteroid.destroy();
			asteroids.splice(i, 1);
		}
	}
	// Update aliens
	for (var j = aliens.length - 1; j >= 0; j--) {
		var alien = aliens[j];
		alien.update();
		if (alien.y > 2732) {
			alien.destroy();
			aliens.splice(j, 1);
			// End the game
			LK.showGameOver();
		}
	}
	// Update bullets
	for (var k = bullets.length - 1; k >= 0; k--) {
		var bullet = bullets[k];
		bullet.update();
		if (bullet.y < 0) {
			bullet.destroy();
			bullets.splice(k, 1);
		}
	}
	// Collision detection
	for (var m = bullets.length - 1; m >= 0; m--) {
		var bullet = bullets[m];
		for (var n = asteroids.length - 1; n >= 0; n--) {
			var asteroid = asteroids[n];
			if (bullet.intersects(asteroid)) {
				bullet.destroy();
				asteroid.destroy();
				bullets.splice(m, 1);
				asteroids.splice(n, 1);
				// Increase the score and update the score text
				LK.setScore(LK.getScore() + 1);
				scoreTxt.setText(LK.getScore());
				break;
			}
		}
		for (var p = aliens.length - 1; p >= 0; p--) {
			var alien = aliens[p];
			if (bullet.intersects(alien)) {
				bullet.destroy();
				alien.destroy();
				bullets.splice(m, 1);
				aliens.splice(p, 1);
				// Increase the score and update the score text
				LK.setScore(LK.getScore() + 1);
				scoreTxt.setText(LK.getScore());
				break;
			}
		}
	}
	// Check if spaceship collides with an asteroid or an alien
	for (var a = asteroids.length - 1; a >= 0; a--) {
		var asteroid = asteroids[a];
		if (spaceship.intersects(asteroid)) {
			// End the game
			LK.showGameOver();
			break;
		}
	}
	for (var b = aliens.length - 1; b >= 0; b--) {
		var alien = aliens[b];
		if (spaceship.intersects(alien)) {
			// End the game
			LK.showGameOver();
			break;
		}
	}
};
// Spawn asteroids
function spawnAsteroid() {
	var asteroid = new Asteroid();
	asteroid.x = Math.random() * 2048;
	asteroid.y = -50;
	asteroids.push(asteroid);
	game.addChild(asteroid);
}
// Spawn aliens
function spawnAlien() {
	var enemy;
	if (LK.getScore() < 10) {
		enemy = new Alien();
	} else {
		enemy = new NewEnemy();
	}
	enemy.x = Math.random() * 2048;
	enemy.y = -50;
	aliens.push(enemy);
	game.addChild(enemy);
}
// Fire bullet
function fireBullet() {
	var bullet = new Bullet();
	bullet.x = spaceship.x;
	bullet.y = spaceship.y - 50;
	bullets.push(bullet);
	game.addChild(bullet);
	// Play the laser_shot sound with decreased volume
	LK.getSound('laser_shot').play({
		volume: 0.3
	});
}
// Create a score text
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
// Add the score text to the GUI overlay
LK.gui.top.addChild(scoreTxt);
// Set intervals for spawning asteroids and aliens
LK.setInterval(spawnAsteroid, 2000);
LK.setInterval(spawnAlien, 5000);
// Play the space_background_music
LK.playMusic('space_background_music', {
	id: 'space_background_music_id'
});
// Handle spaceship movement
game.move = function (x, y, obj) {
	spaceship.x = x;
};
// Handle firing bullets
game.down = function (x, y, obj) {
	fireBullet();
};