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

/**** 
* Classes
****/ 
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Default: straight up
	self.speedX = 0;
	self.speedY = -18;
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
	return self;
});
// CenterShip class removed (no longer needed)
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3; // Will be set dynamically
	self.targetX = 0;
	self.targetY = 0;
	self.update = function () {
		// Move towards target (center ship)
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 0) {
			self.x += dx / dist * self.speed;
			self.y += dy / dist * self.speed;
		}
	};
	return self;
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		// Movement handled in game.update
	};
	return self;
});
// Powerup class
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	var powerupGraphics = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// Example id, replace with actual if needed
// --- Game Variables ---
// Play SpaceBackground sound at game start
LK.getSound('SpaceBackground').play();
// --- Asset Initialization ---
// Add background image as the first child so it's behind everything
var background = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.addChild(background);
var player = new Player();
// Center ship removed as per new requirements
var enemies = [];
var bullets = [];
var powerups = [];
var dragNode = null;
var lastPlayerIntersect = false;
var canShoot = true;
var shootCooldown = 0;
var shootInterval = 18; // frames between shots
var multiShot = 1; // Number of bullets per shot (increases with each powerup, max 5)
var multiShotTimer = 0; // Frames left for powerup
var difficulty = 1; // 1-100
var difficultyTimer = 0; // frames
var enemySpawnTimer = 0;
var enemySpawnInterval = 60; // frames
var powerupSpawnTimer = 0;
var powerupSpawnInterval = 600; // frames
// --- Positioning ---
player.x = 2048 / 2;
player.y = 2732 - 400;
game.addChild(player);
// --- GUI Elements ---
var scoreTxt = new Text2('0', {
	size: 100,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var difficultyTxt = new Text2('Difficulty: 1', {
	size: 70,
	fill: 0xFFCC00
});
difficultyTxt.anchor.set(0, 0);
LK.gui.top.addChild(difficultyTxt);
difficultyTxt.x = 120; // Avoid top left menu
// --- Powerup Timer GUI ---
var powerupTimerTxt = new Text2('', {
	size: 80,
	fill: 0x00FFCC
});
powerupTimerTxt.anchor.set(0, 0); // left-top, will position manually
powerupTimerTxt.visible = false;
LK.gui.top.addChild(powerupTimerTxt);
// Position powerupTimerTxt below difficultyTxt
powerupTimerTxt.x = difficultyTxt.x;
powerupTimerTxt.y = difficultyTxt.y + difficultyTxt.height + 10;
// --- Helper Functions ---
function spawnEnemy() {
	var enemy = new Enemy();
	// Spawn at random X at top, target centerShip
	enemy.x = 200 + Math.random() * (2048 - 400);
	enemy.y = -100;
	enemy.targetX = player.x;
	enemy.targetY = player.y;
	// Speed scales with difficulty
	enemy.speed = 2.5 + difficulty * 0.08;
	enemies.push(enemy);
	game.addChild(enemy);
}
function spawnPowerup() {
	var powerup = new Powerup();
	powerup.x = 200 + Math.random() * (2048 - 400);
	powerup.y = -80;
	powerups.push(powerup);
	game.addChild(powerup);
}
function shootBullets() {
	if (!canShoot) return;
	canShoot = false;
	shootCooldown = shootInterval;
	var angleStep = 0.18; // radians between bullets if multiShot
	var baseAngle = -Math.PI / 2;
	var startAngle = baseAngle - (multiShot - 1) * angleStep / 2;
	for (var i = 0; i < multiShot; i++) {
		var bullet = new Bullet();
		bullet.x = player.x;
		bullet.y = player.y - player.height / 2;
		// Spread for multiShot
		var angle = startAngle + i * angleStep;
		// Set bullet velocity based on angle
		bullet.speedX = Math.cos(angle) * 18;
		bullet.speedY = Math.sin(angle) * 18;
		// Override update for angled bullets
		bullet.update = function () {
			this.x += this.speedX;
			this.y += this.speedY;
		};
		bullets.push(bullet);
		game.addChild(bullet);
	}
	// Play laser sound when firing
	LK.getSound('laser').play();
}
// --- Input Handling ---
game.move = function (x, y, obj) {
	// Move player towards pointer at 0.7 speed (10 üzerinden 7)
	var dx = x - player.x;
	var dy = y - player.y;
	var dist = Math.sqrt(dx * dx + dy * dy);
	if (dist > 0) {
		var moveDist = Math.min(dist, 0.7 * 60); // 0.7*60 px per frame
		player.x += dx / dist * moveDist;
		player.y += dy / dist * moveDist;
	}
	// Check collision with enemies
	var playerHit = false;
	for (var i = 0; i < enemies.length; i++) {
		if (player.intersects(enemies[i])) {
			playerHit = true;
			break;
		}
	}
	if (!lastPlayerIntersect && playerHit) {
		LK.effects.flashScreen(0xff0000, 1000);
		LK.showGameOver();
	}
	lastPlayerIntersect = playerHit;
	// Powerup collection
	for (var i = powerups.length - 1; i >= 0; i--) {
		if (player.intersects(powerups[i])) {
			// Each powerup increases multiShot by 1 and extends timer by 10s
			multiShot += 1;
			// Play powerup sound when collected
			LK.getSound('powerup').play();
			// If timer is running, add 10s, else set to 10s
			if (multiShotTimer > 0) {
				multiShotTimer += 600; // stack duration
			} else {
				multiShotTimer = 600;
			}
			// Show timer text immediately
			powerupTimerTxt.visible = true;
			powerupTimerTxt.setText('Power: ' + Math.ceil(multiShotTimer / 60) + 's');
			powerups[i].destroy();
			powerups.splice(i, 1);
		}
	}
};
// (removed duplicate game.down/game.up, handled below)
// --- Main Game Loop ---
game.update = function () {
	// --- Shooting cooldown ---
	if (!canShoot) {
		shootCooldown--;
		if (shootCooldown <= 0) {
			canShoot = true;
		}
	}
	// --- MultiShot Powerup timer logic ---
	if (multiShotTimer > 0) {
		multiShotTimer--;
		// Show timer text
		powerupTimerTxt.visible = true;
		var secondsLeft = Math.ceil(multiShotTimer / 60);
		powerupTimerTxt.setText('Power: ' + secondsLeft + 's');
		if (multiShotTimer === 0) {
			multiShot = 1;
			powerupTimerTxt.visible = false;
			powerupTimerTxt.setText('');
		}
	} else {
		powerupTimerTxt.visible = false;
		powerupTimerTxt.setText('');
	}
	// --- Difficulty by Score ---
	var newDifficulty = Math.floor(LK.getScore() / 50) + 1;
	if (newDifficulty !== difficulty && newDifficulty <= 100) {
		difficulty = newDifficulty;
		difficultyTxt.setText('Difficulty: ' + difficulty);
		// Increase enemy spawn rate
		enemySpawnInterval = Math.max(20, 60 - difficulty * 0.4);
	}
	// --- Enemy Spawning ---
	enemySpawnTimer++;
	if (enemySpawnTimer >= enemySpawnInterval) {
		spawnEnemy();
		enemySpawnTimer = 0;
	}
	// --- Powerup Spawning ---
	powerupSpawnTimer++;
	if (powerupSpawnTimer >= powerupSpawnInterval) {
		spawnPowerup();
		powerupSpawnTimer = 0;
	}
	// --- Update Enemies ---
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		// Always update target to player's current position so enemies never stop
		enemy.targetX = player.x;
		enemy.targetY = player.y;
		enemy.update();
		// Game over if enemy touches player
		if (enemy.intersects(player)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		// If enemy goes off screen, remove
		if (enemy.y > 2732 + 200) {
			enemy.destroy();
			enemies.splice(i, 1);
		}
	}
	// --- Update Bullets ---
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		bullet.update();
		// Remove if off screen
		if (bullet.y < -100 || bullet.x < -100 || bullet.x > 2148) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		var hit = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			if (bullet.intersects(enemies[j])) {
				// Destroy both
				enemies[j].destroy();
				enemies.splice(j, 1);
				bullet.destroy();
				bullets.splice(i, 1);
				// Score
				LK.setScore(LK.getScore() + 1);
				scoreTxt.setText(LK.getScore());
				hit = true;
				break;
			}
		}
		if (hit) continue;
	}
	// --- Update Powerups ---
	for (var i = powerups.length - 1; i >= 0; i--) {
		var powerup = powerups[i];
		powerup.update();
		if (powerup.y > 2732 + 100) {
			powerup.destroy();
			powerups.splice(i, 1);
		}
	}
};
// --- Touchscreen: auto-fire on hold ---
var fireHold = false;
game.down = function (x, y, obj) {
	fireHold = true;
	game.move(x, y, obj);
};
game.up = function (x, y, obj) {
	fireHold = false;
};
LK.on('tick', function () {
	if (fireHold && canShoot) {
		shootBullets();
	}
});
// --- Initial Score ---
scoreTxt.setText(LK.getScore());
difficultyTxt.setText('Difficulty: ' + difficulty);