/**** 
* 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 = 15;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyCowboy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemyCowboy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.lane = 1;
	self.speed = 3;
	self.lastShot = 0;
	self.shootCooldown = 180; // 3 seconds at 60fps
	self.targetLane = 1;
	self.laneChangeSpeed = 8;
	self.update = function () {
		self.y += self.speed;
		// Move towards target lane
		var targetX = getLaneX(self.targetLane);
		if (Math.abs(self.x - targetX) > self.laneChangeSpeed) {
			if (self.x < targetX) {
				self.x += self.laneChangeSpeed;
			} else {
				self.x -= self.laneChangeSpeed;
			}
		} else {
			self.x = targetX;
			self.lane = self.targetLane;
		}
		// Shooting logic
		self.lastShot++;
		if (self.lastShot >= self.shootCooldown) {
			self.lastShot = 0;
			// Create enemy bullet
			var bullet = new EnemyBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			enemyBullets.push(bullet);
			game.addChild(bullet);
		}
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('cowboy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.lane = 1;
	self.targetLane = 1;
	self.laneChangeSpeed = 12;
	self.lastShot = 0;
	self.shootCooldown = 72; // 1.2 seconds at 60fps
	self.update = function () {
		// Move towards target lane
		var targetX = getLaneX(self.targetLane);
		if (Math.abs(self.x - targetX) > self.laneChangeSpeed) {
			if (self.x < targetX) {
				self.x += self.laneChangeSpeed;
			} else {
				self.x -= self.laneChangeSpeed;
			}
		} else {
			self.x = targetX;
			self.lane = self.targetLane;
		}
		self.lastShot++;
	};
	self.moveLeft = function () {
		if (self.targetLane > 0) {
			self.targetLane--;
		}
	};
	self.moveRight = function () {
		if (self.targetLane < 2) {
			self.targetLane++;
		}
	};
	self.shoot = function () {
		if (self.lastShot >= self.shootCooldown) {
			self.lastShot = 0;
			var bullet = new PlayerBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			playerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
		}
	};
	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 = -20;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
// Game variables
var player;
var enemies = [];
var playerBullets = [];
var enemyBullets = [];
var gameSpeed = 1;
var survivalTime = 0;
var killCount = 0;
var lastEnemySpawn = 0;
var enemySpawnRate = 150; // 5 seconds at 60fps
var speedIncreaseTimer = 0;
// Lane positions
function getLaneX(lane) {
	var laneWidth = 2048 / 3;
	return laneWidth * lane + laneWidth / 2;
}
// Create road background
var road = game.addChild(LK.getAsset('road', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 2732 / 2
}));
// Create player
player = game.addChild(new Player());
player.x = getLaneX(1);
player.y = 2200;
// Create UI
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(scoreTxt);
scoreTxt.x = 120;
scoreTxt.y = 20;
var killsTxt = new Text2('Kills: 0', {
	size: 60,
	fill: 0xFFFFFF
});
killsTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(killsTxt);
killsTxt.y = 20;
// Control buttons
var leftBtn = new Text2('◀', {
	size: 120,
	fill: 0xFFFFFF
});
leftBtn.anchor.set(0.5, 0.5);
LK.gui.bottomLeft.addChild(leftBtn);
leftBtn.x = 200;
leftBtn.y = -150;
var rightBtn = new Text2('▶', {
	size: 120,
	fill: 0xFFFFFF
});
rightBtn.anchor.set(0.5, 0.5);
LK.gui.bottomRight.addChild(rightBtn);
rightBtn.x = -200;
rightBtn.y = -150;
var shootBtn = new Text2('🔫', {
	size: 100,
	fill: 0xFFFFFF
});
shootBtn.anchor.set(0.5, 0.5);
LK.gui.bottom.addChild(shootBtn);
shootBtn.y = -150;
// Button event handlers
leftBtn.down = function () {
	player.moveLeft();
};
rightBtn.down = function () {
	player.moveRight();
};
shootBtn.down = function () {
	player.shoot();
};
// Game update loop
game.update = function () {
	// Update survival time and score
	survivalTime++;
	if (survivalTime % 60 === 0) {
		// Every second
		LK.setScore(LK.getScore() + 0);
		scoreTxt.setText('Score: ' + LK.getScore());
	}
	// Increase game speed over time
	speedIncreaseTimer++;
	if (speedIncreaseTimer % 600 === 0) {
		// Every 10 seconds
		gameSpeed += 0.2;
		if (enemySpawnRate > 120) {
			enemySpawnRate -= 20;
		}
	}
	// Spawn enemies
	lastEnemySpawn++;
	if (lastEnemySpawn >= enemySpawnRate) {
		lastEnemySpawn = 0;
		var enemy = new EnemyCowboy();
		enemy.lane = Math.floor(Math.random() * 3);
		enemy.targetLane = player.lane; // Target player's current lane
		enemy.x = getLaneX(enemy.lane);
		enemy.y = -100;
		enemy.speed *= gameSpeed;
		enemies.push(enemy);
		game.addChild(enemy);
	}
	// Update enemies and make them target player
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		// Occasionally retarget player's lane
		if (LK.ticks % 120 === 0) {
			enemy.targetLane = player.lane;
		}
		// Remove enemies that went off screen
		if (enemy.y > 2800) {
			enemy.destroy();
			enemies.splice(i, 1);
			continue;
		}
	}
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		// Remove bullets that went off screen
		if (bullet.y < -50) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				// Enemy hit
				LK.getSound('enemyHit').play();
				killCount++;
				LK.setScore(LK.getScore() + 5);
				scoreTxt.setText('Score: ' + LK.getScore());
				killsTxt.setText('Kills: ' + killCount);
				// Remove bullet and enemy
				bullet.destroy();
				playerBullets.splice(i, 1);
				enemy.destroy();
				enemies.splice(j, 1);
				break;
			}
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		// Remove bullets that went off screen
		if (bullet.y > 2800) {
			bullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (bullet.intersects(player)) {
			// Player hit - game over
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
	}
};