/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1");

/**** 
* Classes
****/ 
var Alien = Container.expand(function () {
	var self = Container.call(this);
	var alienGraphics = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.lastY = 0;
	self.points = 10;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -15;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 0;
	self.maxSpeed = 12;
	self.update = function () {
		self.x += self.speed;
		if (self.x < 40) self.x = 40;
		if (self.x > 2048 - 40) self.x = 2048 - 40;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var spaceship = game.addChild(new Spaceship());
spaceship.x = 2048 / 2;
spaceship.y = 2732 - 120;
var playerBullets = [];
var aliens = [];
var waveCount = 0;
var alienSpeed = 3.5;
var spawnRate = 120;
var spawnCounter = 0;
var gameActive = true;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.setText(LK.getScore());
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var waveDisplay = new Text2('Wave: 1', {
	size: 100,
	fill: 0xFFFF00
});
waveDisplay.anchor.set(1, 0);
LK.gui.topRight.addChild(waveDisplay);
var dragNode = null;
var dragStartX = 0;
game.down = function (x, y, obj) {
	dragStartX = x;
	dragNode = spaceship;
	var bullet = game.addChild(new PlayerBullet());
	bullet.x = spaceship.x;
	bullet.y = spaceship.y - 50;
	bullet.lastY = bullet.y;
	playerBullets.push(bullet);
	LK.getSound('shoot').play();
};
game.move = function (x, y, obj) {
	if (dragNode) {
		var deltaX = x - dragStartX;
		spaceship.speed = deltaX / 10;
		dragStartX = x;
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
	spaceship.speed = 0;
};
game.update = function () {
	if (!gameActive) return;
	spawnCounter++;
	if (spawnCounter >= spawnRate) {
		spawnCounter = 0;
		var newAlien = game.addChild(new Alien());
		newAlien.x = Math.random() * (2048 - 120) + 60;
		newAlien.y = 50;
		newAlien.speed = alienSpeed;
		newAlien.lastY = newAlien.y;
		aliens.push(newAlien);
	}
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.lastY >= -50 && bullet.y < -50) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		for (var j = aliens.length - 1; j >= 0; j--) {
			var alien = aliens[j];
			if (bullet.intersects(alien)) {
				LK.getSound('explosion').play();
				LK.setScore(LK.getScore() + alien.points);
				scoreTxt.setText(LK.getScore());
				bullet.destroy();
				playerBullets.splice(i, 1);
				alien.destroy();
				aliens.splice(j, 1);
				break;
			}
		}
		if (i < playerBullets.length) {
			bullet.lastY = bullet.y;
		}
	}
	for (var a = aliens.length - 1; a >= 0; a--) {
		var alien = aliens[a];
		if (alien.lastY <= 2732 && alien.y > 2732) {
			gameActive = false;
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		if (alien.intersects(spaceship)) {
			gameActive = false;
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		alien.lastY = alien.y;
	}
	if (aliens.length === 0 && spawnCounter > spawnRate * 2) {
		waveCount++;
		alienSpeed += 0.75;
		spawnRate = Math.max(60, spawnRate - 10);
		waveDisplay.setText('Wave: ' + (waveCount + 1));
	}
};
LK.playMusic('bgmusic', {
	loop: true
});