/**** 
* 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.isChasing = false;
	self.update = function () {
		if (!self.isChasing) {
			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
	});
	var gun = self.attachAsset('gun', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	gun.y = -40;
	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 = 2400;
var bullets = [];
var enemies = [];
var gameActive = true;
var spawnRate = 60;
var difficultyMultiplier = 1;
var playerSpeed = 12;
var keysPressed = {
	up: false,
	down: false,
	left: false,
	right: false
};
var maxBullets = 30;
var currentBullets = 30;
var isReloading = false;
var reloadTime = 2000;
var leftClickHeld = false;
var canShoot = true;
var enemyDetectionRange = 500;
var scoreTxt = new Text2('0', {
	size: 80,
	fill: '#ffffff'
});
scoreTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(scoreTxt);
var difficultyTxt = new Text2('Wave: 1', {
	size: 80,
	fill: '#ffffff'
});
difficultyTxt.anchor.set(0, 0);
LK.gui.bottom.addChild(difficultyTxt);
var ammotTxt = new Text2('Ammo: 30/30', {
	size: 60,
	fill: '#ffffff'
});
ammotTxt.anchor.set(0, 1);
LK.gui.bottomLeft.addChild(ammotTxt);
function spawnEnemy() {
	var enemy = game.addChild(new Enemy());
	enemy.x = Math.random() * 1800 + 100;
	enemy.y = -60;
	enemy.speed = 2 + difficultyMultiplier * 0.5;
	enemy.lastY = enemy.y;
	enemies.push(enemy);
}
function updateScore() {
	scoreTxt.setText('Score: ' + LK.getScore());
	var wave = Math.floor(LK.getScore() / 10) + 1;
	difficultyTxt.setText('Wave: ' + wave);
	difficultyMultiplier = 1 + (wave - 1) * 0.3;
	spawnRate = Math.max(20, 60 - (wave - 1) * 3);
}
function updatePlayerMovement() {
	if (keysPressed.left) {
		player.x -= playerSpeed;
	}
	if (keysPressed.right) {
		player.x += playerSpeed;
	}
	if (keysPressed.up) {
		player.y -= playerSpeed;
	}
	if (keysPressed.down) {
		player.y += playerSpeed;
	}
	if (player.x < 40) player.x = 40;
	if (player.x > 2048 - 40) player.x = 2048 - 40;
	if (player.y < 200) player.y = 200;
	if (player.y > 2650) player.y = 2650;
}
game.move = function (x, y, obj) {
	var distX = x - player.x;
	var distY = y - player.y;
	var distance = Math.sqrt(distX * distX + distY * distY);
	if (distance > 150) {
		keysPressed.up = distY < -75;
		keysPressed.down = distY > 75;
		keysPressed.left = distX < -75;
		keysPressed.right = distX > 75;
	}
	// Shoot when left click is held
	if (leftClickHeld && !isReloading && currentBullets > 0 && canShoot) {
		var newBullet = game.addChild(new Bullet());
		newBullet.x = player.x;
		newBullet.y = player.y - 40;
		newBullet.lastY = newBullet.y;
		bullets.push(newBullet);
		LK.getSound('shoot').play();
		currentBullets--;
		ammotTxt.setText('Ammo: ' + currentBullets + '/' + maxBullets);
		canShoot = false;
		LK.setTimeout(function () {
			canShoot = true;
		}, 100);
	}
};
game.down = function (x, y, obj) {
	leftClickHeld = true;
};
game.up = function (x, y, obj) {
	keysPressed.up = false;
	keysPressed.down = false;
	keysPressed.left = false;
	keysPressed.right = false;
	leftClickHeld = false;
};
game.update = function () {
	if (!gameActive) return;
	updatePlayerMovement();
	// Spawn enemies
	if (LK.ticks % spawnRate === 0) {
		spawnEnemy();
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.lastY === undefined) {
			bullet.lastY = bullet.y;
		}
		// Check if bullet is off-screen
		if (bullet.lastY >= -20 && bullet.y < -20) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check bullet-enemy collisions
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				LK.getSound('hit').play();
				LK.setScore(LK.getScore() + 1);
				updateScore();
				bullet.destroy();
				bullets.splice(i, 1);
				enemy.destroy();
				enemies.splice(j, 1);
				break;
			}
		}
		bullet.lastY = bullet.y;
	}
	// Update enemies
	for (var k = enemies.length - 1; k >= 0; k--) {
		var enemy = enemies[k];
		if (enemy.lastY === undefined) {
			enemy.lastY = enemy.y;
			enemy.lastIntersecting = false;
		}
		// Check if enemy is off-screen (bottom)
		if (enemy.lastY <= 2732 + 60 && enemy.y > 2732 + 60) {
			enemy.destroy();
			enemies.splice(k, 1);
			continue;
		}
		// Check if player is in detection range
		var distX = player.x - enemy.x;
		var distY = player.y - enemy.y;
		var distToPlayer = Math.sqrt(distX * distX + distY * distY);
		if (distToPlayer < enemyDetectionRange) {
			enemy.isChasing = true;
		}
		// Chase player if detected
		if (enemy.isChasing) {
			var chaseSpeed = 3 + difficultyMultiplier * 0.5;
			if (distX < 0) enemy.x -= chaseSpeed;else if (distX > 0) enemy.x += chaseSpeed;
			if (distY < 0) enemy.y -= chaseSpeed;else if (distY > 0) enemy.y += chaseSpeed;
		}
		// Check player-enemy collision
		var currentIntersecting = enemy.intersects(player);
		if (!enemy.lastIntersecting && currentIntersecting) {
			gameActive = false;
			LK.effects.flashScreen(0xff0000, 500);
			LK.showGameOver();
			return;
		}
		enemy.lastY = enemy.y;
		enemy.lastIntersecting = currentIntersecting;
	}
	// Handle reload
	if (currentBullets === 0 && !isReloading) {
		isReloading = true;
		ammotTxt.setText('RELOADING...');
		LK.setTimeout(function () {
			isReloading = false;
			currentBullets = maxBullets;
			ammotTxt.setText('Ammo: ' + currentBullets + '/' + maxBullets);
		}, reloadTime);
	}
};
LK.playMusic('bgmusic', {
	loop: true
});