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

/**** 
* Classes
****/ 
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.lastY = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = 60;
	self.height = 60;
	self.shootTimer = 0;
	self.shootInterval = 60;
	self.speed = 2;
	self.lastY = 0;
	self.lastIntersecting = false;
	self.update = function () {
		self.y += self.speed;
		self.shootTimer++;
	};
	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 = -12;
	self.lastY = 0;
	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.width = 80;
	self.height = 80;
	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 enemyShips = [];
var enemyBullets = [];
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var dragNode = null;
var gameActive = true;
var shootCounter = 0;
var enemySpawnCounter = 0;
var waveLevel = 1;
function getEnemySpawnRate() {
	var baseRate = 120;
	var scoreBonus = Math.floor(LK.getScore() / 10);
	return Math.max(40, baseRate - scoreBonus * 5);
}
function getEnemySpeed() {
	var baseSpeed = 2;
	var scoreBonus = Math.floor(LK.getScore() / 20);
	return baseSpeed + scoreBonus * 0.2;
}
function getEnemyShootInterval() {
	var baseInterval = 80;
	var scoreBonus = Math.floor(LK.getScore() / 15);
	return Math.max(30, baseInterval - scoreBonus * 3);
}
game.down = function (x, y, obj) {
	dragNode = playerShip;
	handleGameMove(x, y, obj);
};
game.up = function (x, y, obj) {
	dragNode = null;
};
function handleGameMove(x, y, obj) {
	if (dragNode) {
		dragNode.x = x;
		dragNode.x = Math.max(40, Math.min(2048 - 40, dragNode.x));
		dragNode.y = Math.max(2400, Math.min(2732 - 40, dragNode.y));
	}
}
game.move = handleGameMove;
game.update = function () {
	if (!gameActive) return;
	// Player shooting
	shootCounter++;
	if (shootCounter >= 15) {
		var newBullet = new PlayerBullet();
		newBullet.x = playerShip.x;
		newBullet.y = playerShip.y;
		newBullet.lastY = newBullet.y;
		playerBullets.push(newBullet);
		game.addChild(newBullet);
		LK.getSound('shoot').play();
		shootCounter = 0;
	}
	// Spawn enemies
	enemySpawnCounter++;
	var spawnRate = getEnemySpawnRate();
	if (enemySpawnCounter >= spawnRate) {
		var newEnemy = new EnemyShip();
		newEnemy.x = Math.random() * (2048 - 120) + 60;
		newEnemy.y = -30;
		newEnemy.speed = getEnemySpeed();
		newEnemy.shootInterval = getEnemyShootInterval();
		enemyShips.push(newEnemy);
		game.addChild(newEnemy);
		enemySpawnCounter = 0;
	}
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
		// Off-screen check
		if (bullet.lastY >= 0 && bullet.y < 0) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		bullet.lastY = bullet.y;
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var ebullet = enemyBullets[i];
		if (ebullet.lastY === undefined) ebullet.lastY = ebullet.y;
		// Off-screen check
		if (ebullet.lastY <= 2732 && ebullet.y > 2732) {
			ebullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (ebullet.intersects(playerShip)) {
			LK.getSound('hit').play();
			LK.effects.flashScreen(0xff0000, 500);
			gameActive = false;
			LK.showGameOver();
			return;
		}
		ebullet.lastY = ebullet.y;
	}
	// Update enemies
	for (var i = enemyShips.length - 1; i >= 0; i--) {
		var enemy = enemyShips[i];
		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
		if (enemy.lastIntersecting === undefined) enemy.lastIntersecting = false;
		// Enemy shooting
		enemy.shootTimer++;
		if (enemy.shootTimer >= enemy.shootInterval) {
			var newEBullet = new EnemyBullet();
			newEBullet.x = enemy.x;
			newEBullet.y = enemy.y;
			newEBullet.lastY = newEBullet.y;
			enemyBullets.push(newEBullet);
			game.addChild(newEBullet);
			enemy.shootTimer = 0;
		}
		// Off-screen check
		if (enemy.lastY <= 2732 && enemy.y > 2732) {
			enemy.destroy();
			enemyShips.splice(i, 1);
			continue;
		}
		// Check collision with player
		var currentIntersecting = enemy.intersects(playerShip);
		if (!enemy.lastIntersecting && currentIntersecting) {
			LK.getSound('hit').play();
			LK.effects.flashScreen(0xff0000, 500);
			gameActive = false;
			LK.showGameOver();
			return;
		}
		// Check collision with player bullets
		for (var j = playerBullets.length - 1; j >= 0; j--) {
			var pbullet = playerBullets[j];
			if (pbullet.intersects(enemy)) {
				LK.getSound('explosion').play();
				LK.setScore(LK.getScore() + 10);
				scoreTxt.setText(LK.getScore());
				pbullet.destroy();
				playerBullets.splice(j, 1);
				enemy.destroy();
				enemyShips.splice(i, 1);
				break;
			}
		}
		if (i >= 0 && i < enemyShips.length) {
			enemy.lastY = enemy.y;
			enemy.lastIntersecting = currentIntersecting;
		}
	}
};
LK.playMusic('bgmusic', {
	loop: true
});