/**** 
* Classes
****/ 
var Bird = Container.expand(function () {
	var self = Container.call(this);
	var birdGraphics = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocity = 0;
	self.gravity = 0.8;
	self.flapStrength = -12;
	self.lastY = 0;
	self.flap = function () {
		self.velocity = self.flapStrength;
		LK.getSound('flap').play();
	};
	self.update = function () {
		self.lastY = self.y;
		self.velocity += self.gravity;
		self.y += self.velocity;
		// Rotate bird based on velocity
		birdGraphics.rotation = Math.max(-0.5, Math.min(0.5, self.velocity * 0.05));
		// Check ground collision
		if (self.y > 2732 - 150) {
			gameOver();
		}
		// Check ceiling collision
		if (self.y < 50) {
			gameOver();
		}
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	self.gapSize = 300;
	self.speed = -4;
	self.scored = false;
	self.lastX = 0;
	// Create top pipe
	self.topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1,
		flipY: 1
	});
	// Create bottom pipe
	self.bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0
	});
	self.setGapPosition = function (gapY) {
		self.topPipe.y = gapY - self.gapSize / 2;
		self.bottomPipe.y = gapY + self.gapSize / 2;
	};
	self.update = function () {
		self.lastX = self.x;
		self.x += self.speed;
		// Check if pipe passed bird (for scoring)
		if (!self.scored && self.lastX > bird.x && self.x <= bird.x) {
			self.scored = true;
			score++;
			scoreTxt.setText(score);
			LK.setScore(score);
			LK.getSound('score').play();
		}
		// Remove pipe when off screen
		if (self.x < -100) {
			self.destroy();
			for (var i = pipes.length - 1; i >= 0; i--) {
				if (pipes[i] === self) {
					pipes.splice(i, 1);
					break;
				}
			}
		}
	};
	self.checkCollision = function (bird) {
		var birdBounds = {
			x: bird.x - 60,
			y: bird.y - 60,
			width: 120,
			height: 120
		};
		var topPipeBounds = {
			x: self.x - 100,
			y: self.topPipe.y - 600,
			width: 200,
			height: 600
		};
		var bottomPipeBounds = {
			x: self.x - 100,
			y: self.bottomPipe.y,
			width: 200,
			height: 600
		};
		return self.intersectsBounds(birdBounds, topPipeBounds) || self.intersectsBounds(birdBounds, bottomPipeBounds);
	};
	self.intersectsBounds = function (rect1, rect2) {
		return rect1.x < rect2.x + rect2.width && rect1.x + rect1.width > rect2.x && rect1.y < rect2.y + rect2.height && rect1.y + rect1.height > rect2.y;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game variables
// Initialize assets for Flappy Wings
var bird;
var pipes = [];
var ground;
var score = 0;
var scoreTxt;
var gameStarted = false;
var gameEnded = false;
var pipeSpawnTimer = 0;
var pipeSpawnInterval = 90; // frames between pipe spawns
// Create bird
bird = game.addChild(new Bird());
bird.x = 400;
bird.y = 1366; // Center vertically
// Create ground
ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0
}));
ground.x = 0;
ground.y = 2732 - 100;
// Create score display
scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 100;
// Game over function
function gameOver() {
	if (!gameEnded) {
		gameEnded = true;
		LK.effects.flashScreen(0xff0000, 1000);
		LK.setTimeout(function () {
			LK.showGameOver();
		}, 500);
	}
}
// Spawn pipe function
function spawnPipe() {
	var pipe = game.addChild(new Pipe());
	pipe.x = 2048 + 100; // Start off screen
	// Random gap position (much lower on screen)
	var minGapY = 1800;
	var maxGapY = 2732 - 200;
	var gapY = minGapY + Math.random() * (maxGapY - minGapY);
	pipe.setGapPosition(gapY);
	pipes.push(pipe);
}
// Touch/tap controls
game.down = function (x, y, obj) {
	if (!gameStarted) {
		gameStarted = true;
	}
	if (!gameEnded) {
		bird.flap();
	}
};
// Main game loop
game.update = function () {
	if (!gameStarted || gameEnded) {
		return;
	}
	// Update bird
	bird.update();
	// Spawn pipes
	pipeSpawnTimer++;
	if (pipeSpawnTimer >= pipeSpawnInterval) {
		spawnPipe();
		pipeSpawnTimer = 0;
	}
	// Update pipes and check collisions
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		pipe.update();
		// Check collision with bird
		if (pipe.checkCollision(bird)) {
			gameOver();
		}
	}
};