/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	highScore: 0
});

/**** 
* 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.flapPower = -18;
	self.maxFallSpeed = 15;
	self.flap = function () {
		self.velocity = self.flapPower;
		LK.getSound('flap').play();
		// Add flap animation
		tween.stop(birdGraphics, {
			rotation: true
		});
		birdGraphics.rotation = -0.3;
		tween(birdGraphics, {
			rotation: 0.3
		}, {
			duration: 300,
			easing: tween.easeOut
		});
	};
	self.update = function () {
		// Apply gravity
		self.velocity += self.gravity;
		// Cap fall speed
		if (self.velocity > self.maxFallSpeed) {
			self.velocity = self.maxFallSpeed;
		}
		// Update position
		self.y += self.velocity;
		// Check boundaries
		if (self.y < 0) {
			self.y = 0;
			self.velocity = 0;
		}
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	self.speed = -4;
	self.gapSize = 400;
	self.scored = false;
	// Create top pipe
	self.topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 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.x += self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var bird;
var pipes = [];
var ground;
var gameStarted = false;
var gameSpeed = 4;
var pipeSpawnTimer = 0;
var pipeSpawnInterval = 90; // frames between pipe spawns
// Create score display
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 100;
// Create high score display
var highScoreTxt = new Text2('BEST: ' + storage.highScore, {
	size: 50,
	fill: 0xFFFFFF
});
highScoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(highScoreTxt);
highScoreTxt.y = 200;
// Create tap to start text
var startTxt = new Text2('TAP TO START', {
	size: 60,
	fill: 0xFFFFFF
});
startTxt.anchor.set(0.5, 0.5);
game.addChild(startTxt);
startTxt.x = 2048 / 2;
startTxt.y = 2732 / 2 - 200;
// Create bird
bird = game.addChild(new Bird());
bird.x = 300;
bird.y = 2732 / 2;
// Create ground
ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 1
}));
ground.x = 0;
ground.y = 2732;
function spawnPipe() {
	var pipe = new Pipe();
	pipe.x = 2048 + 60; // Start off-screen right
	// Random gap position (avoid too high or too low)
	var minGapY = 200;
	var maxGapY = 2732 - 200 - 150; // Account for ground height
	var gapY = minGapY + Math.random() * (maxGapY - minGapY);
	pipe.setGapPosition(gapY);
	pipes.push(pipe);
	game.addChild(pipe);
}
function checkCollisions() {
	// Check ground collision
	if (bird.y >= ground.y - ground.height / 2 - bird.height / 2) {
		return true;
	}
	// Check ceiling collision
	if (bird.y <= bird.height / 2) {
		return true;
	}
	// Check pipe collisions
	for (var i = 0; i < pipes.length; i++) {
		var pipe = pipes[i];
		// Check if bird is horizontally aligned with pipe
		if (bird.x + bird.width / 2 > pipe.x - pipe.topPipe.width / 2 && bird.x - bird.width / 2 < pipe.x + pipe.topPipe.width / 2) {
			// Check top pipe collision
			if (bird.y - bird.height / 2 < pipe.topPipe.y) {
				return true;
			}
			// Check bottom pipe collision
			if (bird.y + bird.height / 2 > pipe.bottomPipe.y) {
				return true;
			}
		}
	}
	return false;
}
function updateScore() {
	for (var i = 0; i < pipes.length; i++) {
		var pipe = pipes[i];
		if (!pipe.scored && pipe.x < bird.x) {
			pipe.scored = true;
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
			LK.getSound('score').play();
			// Check and update high score
			if (LK.getScore() > storage.highScore) {
				storage.highScore = LK.getScore();
				highScoreTxt.setText('BEST: ' + storage.highScore);
			}
			// Increase difficulty slightly
			if (LK.getScore() % 5 === 0 && pipeSpawnInterval > 60) {
				pipeSpawnInterval -= 2;
			}
		}
	}
}
game.down = function (x, y, obj) {
	if (!gameStarted) {
		gameStarted = true;
		startTxt.visible = false;
	}
	if (gameStarted) {
		bird.flap();
	}
};
game.update = function () {
	if (!gameStarted) {
		return;
	}
	// Update bird
	bird.update();
	// Check collisions
	if (checkCollisions()) {
		LK.showGameOver();
		return;
	}
	// Spawn pipes
	pipeSpawnTimer++;
	if (pipeSpawnTimer >= pipeSpawnInterval) {
		spawnPipe();
		pipeSpawnTimer = 0;
	}
	// Update pipes
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		pipe.update();
		// Remove pipes that are off-screen
		if (pipe.x < -120) {
			pipe.destroy();
			pipes.splice(i, 1);
		}
	}
	// Update score
	updateScore();
};