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

/**** 
* Classes
****/ 
var Character = Container.expand(function () {
	var self = Container.call(this);
	var characterGraphics = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityY = 0;
	self.gravity = 0.5;
	self.jumpForce = -12;
	self.jump = function () {
		self.velocityY = self.jumpForce;
		LK.getSound('jump').play();
	};
	self.update = function () {
		self.velocityY += self.gravity;
		self.y += self.velocityY;
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	// Top pipe
	self.topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Bottom pipe
	self.bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.speed = -2.5;
	self.gapSize = 400;
	self.scored = false;
	self.setGapPosition = function (centerY) {
		self.topPipe.y = centerY - self.gapSize / 2;
		self.bottomPipe.y = centerY + self.gapSize / 2;
	};
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var character;
var pipes = [];
var gameStarted = false;
var spawnTimer = 0;
var spawnInterval = 180; // 3 seconds at 60fps
// Create score display
var scoreTxt = new Text2('0', {
	size: 100,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Create start instruction
var startTxt = new Text2('TAP TO START', {
	size: 80,
	fill: 0xFFFFFF
});
startTxt.anchor.set(0.5, 0.5);
startTxt.x = 2048 / 2;
startTxt.y = 2732 / 2 + 200;
game.addChild(startTxt);
// Initialize character
character = game.addChild(new Character());
character.x = 2048 / 4;
character.y = 2732 / 2;
function startGame() {
	if (!gameStarted) {
		gameStarted = true;
		character.jump();
		game.removeChild(startTxt);
	}
}
function spawnPipe() {
	var pipe = new Pipe();
	pipe.x = 2048 + 100;
	// Random gap position (avoid too high or too low, more centered)
	var minY = 500;
	var maxY = 2732 - 500;
	var gapCenterY = minY + Math.random() * (maxY - minY);
	pipe.setGapPosition(gapCenterY);
	pipes.push(pipe);
	game.addChild(pipe);
}
function checkCollisions() {
	// Check if character is off screen
	if (character.y < -100 || character.y > 2732 + 100) {
		LK.showGameOver();
		return;
	}
	// Check pipe collisions
	for (var i = 0; i < pipes.length; i++) {
		var pipe = pipes[i];
		// Check if character passed through pipe for scoring
		if (!pipe.scored && character.x > pipe.x + 60) {
			pipe.scored = true;
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
			LK.getSound('score').play();
		}
		// Check collision with pipes
		if (character.intersects(pipe.topPipe) || character.intersects(pipe.bottomPipe)) {
			LK.showGameOver();
			return;
		}
	}
}
function cleanupPipes() {
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		if (pipe.x < -200) {
			pipe.destroy();
			pipes.splice(i, 1);
		}
	}
}
// Game input handling
game.down = function (x, y, obj) {
	if (!gameStarted) {
		startGame();
	} else {
		character.jump();
	}
};
// Main game loop
game.update = function () {
	if (!gameStarted) return;
	// Update character
	character.update();
	// Update pipes
	for (var i = 0; i < pipes.length; i++) {
		pipes[i].update();
	}
	// Spawn new pipes
	spawnTimer++;
	if (spawnTimer >= spawnInterval) {
		spawnPipe();
		spawnTimer = 0;
	}
	// Check collisions
	checkCollisions();
	// Clean up off-screen pipes
	cleanupPipes();
};