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

/**** 
* Classes
****/ 
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;
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.health = 1;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.maxHealth = 100;
	self.health = 100;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a2e
});

/**** 
* Game Code
****/ 
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2550;
var enemies = [];
var bullets = [];
var waveNumber = 1;
var enemiesInWave = 5;
var enemiesKilled = 0;
var currentWaveEnemies = 0;
var healthText = new Text2(player.health.toString(), {
	size: 80,
	fill: 0x00FF00
});
healthText.anchor.set(0, 0);
LK.gui.topRight.addChild(healthText);
var scoreText = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
var waveText = new Text2('Wave ' + waveNumber, {
	size: 60,
	fill: 0xFFFF00
});
waveText.anchor.set(1, 0);
LK.gui.topRight.addChild(waveText);
var spawnTimer = 0;
var spawnInterval = 60;
var waveComplete = false;
LK.playMusic('bgmusic', {
	loop: true
});
function spawnEnemy() {
	var newEnemy = game.addChild(new Enemy());
	var spawnX = Math.random() * (2048 - 100) + 50;
	newEnemy.x = spawnX;
	newEnemy.y = -50;
	newEnemy.lastY = newEnemy.y;
	newEnemy.lastIntersecting = false;
	enemies.push(newEnemy);
	currentWaveEnemies++;
}
function startNewWave() {
	waveNumber++;
	enemiesInWave = Math.floor(5 + waveNumber * 1.5);
	currentWaveEnemies = 0;
	waveComplete = false;
	spawnTimer = 0;
	spawnInterval = Math.max(30, 60 - waveNumber * 3);
	waveText.setText('Wave ' + waveNumber);
}
game.move = function (x, y, obj) {
	player.x = x;
	if (player.x < 40) player.x = 40;
	if (player.x > 2008) player.x = 2008;
};
game.down = function (x, y, obj) {
	var newBullet = game.addChild(new Bullet());
	newBullet.x = player.x;
	newBullet.y = player.y - 50;
	newBullet.lastY = newBullet.y;
	bullets.push(newBullet);
	LK.getSound('shoot').play();
};
game.update = function () {
	// Spawn enemies for current wave
	if (!waveComplete && currentWaveEnemies < enemiesInWave) {
		spawnTimer++;
		if (spawnTimer >= spawnInterval) {
			spawnEnemy();
			spawnTimer = 0;
		}
	}
	// Update and manage bullets
	for (var b = bullets.length - 1; b >= 0; b--) {
		var bullet = bullets[b];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		if (bullet.y < -30) {
			bullet.destroy();
			bullets.splice(b, 1);
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update and manage enemies
	for (var e = enemies.length - 1; e >= 0; e--) {
		var enemy = enemies[e];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		if (enemy.lastIntersecting === undefined) enemy.lastIntersecting = false;
		// Enemy reached player
		if (enemy.lastY < 2650 && enemy.y >= 2650) {
			player.health -= 10;
			healthText.setText(player.health.toString());
			LK.getSound('damage').play();
			if (player.health <= 0) {
				LK.showGameOver();
			}
			enemy.destroy();
			enemies.splice(e, 1);
			continue;
		}
		// Check bullet collisions
		var bulletHit = false;
		for (var b = bullets.length - 1; b >= 0; b--) {
			var bullet = bullets[b];
			if (enemy.intersects(bullet)) {
				bulletHit = true;
				bullet.destroy();
				bullets.splice(b, 1);
				break;
			}
		}
		if (bulletHit) {
			enemy.health--;
			if (enemy.health <= 0) {
				LK.effects.flashObject(enemy, 0xffff00, 100);
				LK.getSound('hit').play();
				LK.setScore(LK.getScore() + 1);
				scoreText.setText(LK.getScore().toString());
				enemiesKilled++;
				enemy.destroy();
				enemies.splice(e, 1);
				continue;
			}
		}
		enemy.lastY = enemy.y;
	}
	// Check if wave is complete
	if (!waveComplete && currentWaveEnemies >= enemiesInWave && enemies.length === 0) {
		waveComplete = true;
		if (LK.getScore() >= 50) {
			LK.showYouWin();
		} else {
			LK.setTimeout(function () {
				startNewWave();
			}, 1000);
		}
	}
	// Increase difficulty over time
	if (enemies.length > 0) {
		for (var i = 0; i < enemies.length; i++) {
			var speedIncrease = 0.5 + waveNumber * 0.2;
			if (enemies[i].speed !== speedIncrease) {
				enemies[i].speed = speedIncrease;
			}
		}
	}
};