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

/**** 
* Classes
****/ 
var AlienBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('alienBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var AlienEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('alienEnemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.canShoot = Math.random() > 0.6;
	self.shootCounter = 0;
	self.shootInterval = 120 + Math.floor(Math.random() * 120);
	self.update = function () {
		self.y += self.speed;
		if (self.canShoot) {
			self.shootCounter++;
		}
	};
	return self;
});
var Meteorite = Container.expand(function () {
	var self = Container.call(this);
	var meteorGraphics = self.attachAsset('meteorite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.rotationSpeed = 0.02;
	self.update = function () {
		self.y += self.speed;
		self.rotation += self.rotationSpeed;
	};
	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.update = function () {
		self.y += self.speed;
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.shootCounter = 0;
	self.shootInterval = 8;
	self.update = function () {
		self.shootCounter++;
	};
	return self;
});
var Spectre = Container.expand(function () {
	var self = Container.call(this);
	var spectreGraphics = self.attachAsset('alienEnemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	spectreGraphics.tint = 0x9900ff;
	self.phaseActive = true;
	self.phaseCounter = 0;
	self.phaseDuration = 70 + Math.floor(Math.random() * 70);
	self.shotCount = 0;
	self.maxShots = 2 + Math.floor(Math.random() * 3);
	self.shotDelay = 20;
	self.shotCounter = 0;
	self.transitionDelay = 180;
	self.transitionCounter = 0;
	self.update = function () {
		if (self.phaseActive) {
			self.phaseCounter++;
			if (self.phaseCounter >= self.phaseDuration) {
				self.vanish();
			}
		} else {
			self.transitionCounter++;
			if (self.transitionCounter >= self.transitionDelay) {
				self.materialize();
			}
		}
		if (self.phaseActive && self.shotCount < self.maxShots) {
			self.shotCounter++;
		}
	};
	self.vanish = function () {
		self.phaseActive = false;
		self.phaseCounter = 0;
		self.transitionCounter = 0;
		self.shotCount = 0;
		self.shotCounter = 0;
		spectreGraphics.alpha = 0.15;
	};
	self.materialize = function () {
		self.phaseActive = true;
		self.phaseCounter = 0;
		self.shotCount = 0;
		self.shotCounter = 0;
		self.x = 150 + Math.random() * 1748;
		self.y = 250 + Math.random() * 700;
		self.phaseDuration = 70 + Math.floor(Math.random() * 70);
		spectreGraphics.alpha = 1;
	};
	return self;
});
var Star = Container.expand(function () {
	var self = Container.call(this);
	var starGraphics = self.attachAsset('star', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 1;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.y = -10;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000011
});

/**** 
* Game Code
****/ 
var playerShip = game.addChild(new PlayerShip());
playerShip.x = 1024;
playerShip.y = 2600;
var playerBullets = [];
var alienBullets = [];
var aliens = [];
var spectres = [];
var meteorites = [];
var stars = [];
var lives = 3;
var score = 0;
var enemiesDestroyed = 0;
var gameTime = 60;
var gameActive = true;
var ENEMIES_TO_WIN = 35;
var livesText = new Text2('Lives: 3', {
	size: 80,
	fill: '#00ff00'
});
livesText.anchor.set(0, 0);
LK.gui.topLeft.addChild(livesText);
var scoreText = new Text2('Score: 0', {
	size: 80,
	fill: '#00ffff'
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
var timerText = new Text2('Time: 60', {
	size: 100,
	fill: '#ffff00'
});
timerText.anchor.set(1, 0);
LK.gui.topRight.addChild(timerText);
// Initialize starfield
var starInitTimer = 0;
function createStarfield() {
	for (var i = 0; i < 100; i++) {
		var newStar = game.addChild(new Star());
		newStar.x = Math.random() * 2048;
		newStar.y = Math.random() * 2732;
		stars.push(newStar);
	}
}
createStarfield();
var spawnAlienTimer = 0;
var spawnMeteoriteTimer = 0;
var spawnSpectreTimer = 0;
function updateUI() {
	livesText.setText('Lives: ' + lives);
	scoreText.setText('Score: ' + score);
	timerText.setText('Time: ' + Math.max(0, Math.ceil(gameTime)));
}
function playerHit() {
	lives--;
	LK.getSound('playerHit').play();
	LK.effects.flashScreen(0xff0000, 300);
	updateUI();
	if (lives <= 0) {
		gameActive = false;
		LK.showGameOver();
	}
}
function enemyDestroyed() {
	score++;
	enemiesDestroyed++;
	LK.getSound('enemyDestroyed').play();
	LK.setScore(score);
	updateUI();
}
function handleMove(x, y, obj) {
	playerShip.x = x;
	playerShip.y = y;
	if (playerShip.x < 40) playerShip.x = 40;
	if (playerShip.x > 2008) playerShip.x = 2008;
	if (playerShip.y < 40) playerShip.y = 40;
	if (playerShip.y > 2700) playerShip.y = 2700;
}
game.move = handleMove;
LK.playMusic('bgMusic', {
	loop: true
});
game.update = function () {
	if (!gameActive) return;
	// Update timer
	gameTime -= 1 / 60;
	updateUI();
	if (gameTime <= 0) {
		gameActive = false;
		if (enemiesDestroyed >= ENEMIES_TO_WIN) {
			LK.showYouWin();
		} else {
			LK.showGameOver();
		}
		return;
	}
	// Player shooting
	playerShip.shootCounter++;
	if (playerShip.shootCounter >= playerShip.shootInterval) {
		var newBullet = new PlayerBullet();
		newBullet.x = playerShip.x;
		newBullet.y = playerShip.y - 40;
		playerBullets.push(newBullet);
		game.addChild(newBullet);
		LK.getSound('playerShoot').play();
		playerShip.shootCounter = 0;
	}
	// Spawn aliens
	spawnAlienTimer++;
	if (spawnAlienTimer > 90) {
		var newAlien = new AlienEnemy();
		newAlien.x = Math.random() * 2048;
		newAlien.y = -50;
		aliens.push(newAlien);
		game.addChild(newAlien);
		spawnAlienTimer = 0;
	}
	// Spawn meteorites
	spawnMeteoriteTimer++;
	if (spawnMeteoriteTimer > 120) {
		var newMeteorite = new Meteorite();
		newMeteorite.x = Math.random() * 2048;
		newMeteorite.y = -50;
		meteorites.push(newMeteorite);
		game.addChild(newMeteorite);
		spawnMeteoriteTimer = 0;
	}
	// Spawn spectres
	spawnSpectreTimer++;
	if (spawnSpectreTimer > 180) {
		var newSpectre = new Spectre();
		newSpectre.x = Math.random() * 2048;
		newSpectre.y = 300;
		spectres.push(newSpectre);
		game.addChild(newSpectre);
		spawnSpectreTimer = 0;
	}
	// Update stars
	for (var s = stars.length - 1; s >= 0; s--) {
		stars[s].update();
	}
	// Update and check player bullets
	for (var p = playerBullets.length - 1; p >= 0; p--) {
		var bullet = playerBullets[p];
		bullet.update();
		if (bullet.y < -30) {
			bullet.destroy();
			playerBullets.splice(p, 1);
			continue;
		}
		// Check collision with spectres
		for (var sp = spectres.length - 1; sp >= 0; sp--) {
			var spectre = spectres[sp];
			if (spectre.phaseActive && bullet.intersects(spectre)) {
				LK.effects.flashObject(spectre, 0xff0000, 200);
				bullet.destroy();
				playerBullets.splice(p, 1);
				spectre.destroy();
				spectres.splice(sp, 1);
				enemyDestroyed();
				break;
			}
		}
		// Check collision with aliens
		for (var a = aliens.length - 1; a >= 0; a--) {
			if (bullet.intersects(aliens[a])) {
				LK.effects.flashObject(aliens[a], 0xff0000, 200);
				bullet.destroy();
				playerBullets.splice(p, 1);
				aliens[a].destroy();
				aliens.splice(a, 1);
				enemyDestroyed();
				break;
			}
		}
		// Check collision with meteorites
		if (p >= 0 && p < playerBullets.length) {
			for (var m = meteorites.length - 1; m >= 0; m--) {
				if (bullet.intersects(meteorites[m])) {
					bullet.destroy();
					playerBullets.splice(p, 1);
					meteorites[m].destroy();
					meteorites.splice(m, 1);
					break;
				}
			}
		}
	}
	// Update spectres and their burst fire
	for (var sp = spectres.length - 1; sp >= 0; sp--) {
		var spectre = spectres[sp];
		spectre.update();
		if (spectre.y > 2800) {
			spectre.destroy();
			spectres.splice(sp, 1);
			continue;
		}
		// Spectre burst fire
		if (spectre.phaseActive && spectre.shotCount < spectre.maxShots && spectre.shotCounter >= spectre.shotDelay) {
			var newAlienBullet = new AlienBullet();
			newAlienBullet.x = spectre.x;
			newAlienBullet.y = spectre.y + 30;
			alienBullets.push(newAlienBullet);
			game.addChild(newAlienBullet);
			spectre.shotCount++;
			spectre.shotCounter = 0;
		}
		// Check collision with player
		if (spectre.phaseActive && spectre.intersects(playerShip)) {
			spectre.destroy();
			spectres.splice(sp, 1);
			playerHit();
		}
	}
	// Update aliens and their shooting
	for (var a = aliens.length - 1; a >= 0; a--) {
		var alien = aliens[a];
		alien.update();
		if (alien.y > 2800) {
			alien.destroy();
			aliens.splice(a, 1);
			continue;
		}
		// Alien shoots
		if (alien.canShoot && alien.shootCounter >= alien.shootInterval) {
			var newAlienBullet = new AlienBullet();
			newAlienBullet.x = alien.x;
			newAlienBullet.y = alien.y + 30;
			alienBullets.push(newAlienBullet);
			game.addChild(newAlienBullet);
			alien.shootCounter = 0;
		}
		// Check collision with player
		if (alien.intersects(playerShip)) {
			alien.destroy();
			aliens.splice(a, 1);
			playerHit();
		}
	}
	// Update meteorites
	for (var m = meteorites.length - 1; m >= 0; m--) {
		var meteorite = meteorites[m];
		meteorite.update();
		if (meteorite.y > 2800) {
			meteorite.destroy();
			meteorites.splice(m, 1);
			continue;
		}
		// Check collision with player
		if (meteorite.intersects(playerShip)) {
			meteorite.destroy();
			meteorites.splice(m, 1);
			playerHit();
		}
	}
	// Update alien bullets
	for (var ab = alienBullets.length - 1; ab >= 0; ab--) {
		var aBullet = alienBullets[ab];
		aBullet.update();
		if (aBullet.y > 2800) {
			aBullet.destroy();
			alienBullets.splice(ab, 1);
			continue;
		}
		// Check collision with player
		if (aBullet.intersects(playerShip)) {
			aBullet.destroy();
			alienBullets.splice(ab, 1);
			playerHit();
		}
	}
};