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

/**** 
* 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 = 0.4; // Reduced from 0.6 for gentler falling
	self.flapStrength = -14; // Reduced from -16 for more controlled flight
	self.maxVelocity = 12; // Reduced from 15 for better control
	self.flap = function () {
		self.velocity = self.flapStrength;
		LK.getSound('flap').play();
		// Animation for flap
		tween(birdGraphics, {
			rotation: -0.5
		}, {
			duration: 150
		});
		tween(birdGraphics, {
			rotation: 0
		}, {
			duration: 300
		});
	};
	self.update = function () {
		// Apply gravity
		self.velocity += self.gravity;
		// Limit velocity
		if (self.velocity > self.maxVelocity) {
			self.velocity = self.maxVelocity;
		}
		// Update position
		self.y += self.velocity;
		// Rotate bird based on velocity
		var targetRotation = Math.min(Math.max(self.velocity * 0.1, -0.5), 1.5);
		birdGraphics.rotation = targetRotation;
	};
	return self;
});
var Cloud = Container.expand(function () {
	var self = Container.call(this);
	var cloudGraphics = self.attachAsset('cloud', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	cloudGraphics.alpha = 0.6;
	self.speed = -1 - Math.random() * 2; // Random speed between -1 and -3
	self.floatOffset = Math.random() * Math.PI * 2; // Random starting float phase
	self.floatSpeed = 0.02 + Math.random() * 0.02; // Random float speed
	self.initialY = self.y;
	self.update = function () {
		self.x += self.speed;
		// Floating motion using sine wave
		self.y = self.initialY + Math.sin(LK.ticks * self.floatSpeed + self.floatOffset) * 20;
	};
	return self;
});
var Pipe = Container.expand(function () {
	var self = Container.call(this);
	self.speed = -4;
	self.gapSize = 600; // Increased from 400 to 600 for easier passage
	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.setupPipes = function (gapCenterY) {
		self.topPipe.y = gapCenterY - self.gapSize / 2;
		self.bottomPipe.y = gapCenterY + self.gapSize / 2;
	};
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game variables
var bird;
var pipes = [];
var clouds = [];
var cloudSpawnTimer = 0;
var cloudSpawnDelay = 300; // Spawn cloud every 300 frames (5 seconds at 60fps)
var ground;
var gameStarted = false;
var gameOver = false;
var pipeSpawnTimer = 0;
var pipeSpawnDelay = 120; // Reduced from 200 frames for closer obstacles
var initialPipeSpawnDelay = 100; // Increased from 60 frames for better start
// UI elements
var scoreTxt = new Text2('0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Best score display
var bestScore = storage.bestScore || 0;
var bestScoreTxt = new Text2('BEST: ' + bestScore, {
	size: 50,
	fill: 0xFFFFFF
});
bestScoreTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(bestScoreTxt);
var instructionTxt = new Text2('TAP TO FLAP', {
	size: 60,
	fill: 0xFFFFFF
});
instructionTxt.anchor.set(0.5, 0.5);
instructionTxt.x = 2048 / 2;
instructionTxt.y = 2732 / 2 + 200;
game.addChild(instructionTxt);
// Create bird
bird = game.addChild(new Bird());
bird.x = 400;
bird.y = 2732 / 2;
// Create ground - duplicated side by side for continuous ground - moved to GUI layer and fixed
var groundTiles = [];
for (var i = 0; i < 8; i++) {
	var groundTile = LK.getAsset('ground', {
		anchorX: 0,
		anchorY: 1
	});
	groundTile.x = i * 291; // Position tiles side by side based on ground width
	groundTile.y = 2732;
	groundTiles.push(groundTile);
	LK.gui.addChild(groundTile); // Add to GUI layer instead of game world
}
ground = groundTiles[0]; // Keep reference to first tile for backward compatibility
// Spawn initial clouds
for (var c = 0; c < 3; c++) {
	var initialCloud = new Cloud();
	initialCloud.x = Math.random() * 2048;
	initialCloud.y = 200 + Math.random() * 800;
	initialCloud.initialY = initialCloud.y;
	var scale = 0.8 + Math.random() * 0.6;
	initialCloud.scaleX = scale;
	initialCloud.scaleY = scale;
	clouds.push(initialCloud);
	game.addChild(initialCloud);
	game.setChildIndex(initialCloud, 0);
}
function startGame() {
	gameStarted = true;
	instructionTxt.visible = false;
	bird.flap();
}
function spawnPipe() {
	var pipe = new Pipe();
	var minY = 400;
	var maxY = 2732 - 400;
	var gapCenterY = minY + Math.random() * (maxY - minY);
	pipe.x = 2048 + 60;
	pipe.setupPipes(gapCenterY);
	pipes.push(pipe);
	game.addChild(pipe);
}
function spawnCloud() {
	var cloud = new Cloud();
	cloud.x = 2048 + 100;
	cloud.y = 200 + Math.random() * 800; // Random Y position in upper part of screen
	cloud.initialY = cloud.y;
	// Random scale for variety
	var scale = 0.8 + Math.random() * 0.6; // Scale between 0.8 and 1.4
	cloud.scaleX = scale;
	cloud.scaleY = scale;
	clouds.push(cloud);
	game.addChild(cloud);
	// Send cloud to back so it appears behind other elements
	game.setChildIndex(cloud, 0);
}
function checkCollisions() {
	// Check ground collision - check against all ground tiles
	for (var g = 0; g < groundTiles.length; g++) {
		if (bird.y + 20 >= groundTiles[g].y) {
			// Reduced from 30 to 20 for more forgiving ground collision
			// Immediate death with ground tween effect
			tween(groundTiles[g], {
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 300
			});
			return true;
		}
		// Check if bird intersects with ground tile for immediate death
		if (bird.intersects(groundTiles[g])) {
			// Resize ground with tween effect
			tween(groundTiles[g], {
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 300
			});
			return true;
		}
	}
	// Check ceiling collision
	if (bird.y - 30 <= 0) {
		return true;
	}
	// Check pipe collisions
	for (var i = 0; i < pipes.length; i++) {
		var pipe = pipes[i];
		// Simple collision detection with pipes - reduced hitbox for easier gameplay
		var birdLeft = bird.x - 20; // Reduced from 30
		var birdRight = bird.x + 20; // Reduced from 30
		var birdTop = bird.y - 15; // Reduced from 22
		var birdBottom = bird.y + 15; // Reduced from 22
		var pipeLeft = pipe.x - 60;
		var pipeRight = pipe.x + 60;
		if (birdRight > pipeLeft && birdLeft < pipeRight) {
			// Bird is within pipe's horizontal bounds
			var topPipeBottom = pipe.topPipe.y;
			var bottomPipeTop = pipe.bottomPipe.y;
			if (birdTop < topPipeBottom || birdBottom > bottomPipeTop) {
				return true;
			}
		}
		// Check if bird touches pipe - immediate death with resize effect
		if (bird.intersects(pipe.topPipe) || bird.intersects(pipe.bottomPipe)) {
			// Calculate current pipe scale and apply death effect scaling
			var currentTopScaleX = pipe.topPipe.scaleX || 1;
			var currentTopScaleY = pipe.topPipe.scaleY || 1;
			var currentBottomScaleX = pipe.bottomPipe.scaleX || 1;
			var currentBottomScaleY = pipe.bottomPipe.scaleY || 1;
			// Resize pipe with tween effect based on current size
			tween(pipe.topPipe, {
				scaleX: currentTopScaleX * 1.2,
				scaleY: currentTopScaleY * 1.2
			}, {
				duration: 200
			});
			tween(pipe.bottomPipe, {
				scaleX: currentBottomScaleX * 1.2,
				scaleY: currentBottomScaleY * 1.2
			}, {
				duration: 200
			});
			return true;
		}
	}
	return false;
}
function updateScore() {
	for (var i = 0; i < pipes.length; i++) {
		var pipe = pipes[i];
		if (!pipe.scored && bird.x > pipe.x + 60) {
			pipe.scored = true;
			LK.setScore(LK.getScore() + 1);
			scoreTxt.setText(LK.getScore());
			// Update best score if current score is higher
			if (LK.getScore() > bestScore) {
				bestScore = LK.getScore();
				storage.bestScore = bestScore;
				bestScoreTxt.setText('BEST: ' + bestScore);
			}
			LK.getSound('score').play();
		}
	}
}
function cleanupPipes() {
	for (var i = pipes.length - 1; i >= 0; i--) {
		var pipe = pipes[i];
		if (pipe.x < -120) {
			pipe.destroy();
			pipes.splice(i, 1);
		}
	}
}
// Input handling
game.down = function (x, y, obj) {
	if (!gameStarted) {
		startGame();
	} else if (!gameOver) {
		bird.flap();
	}
};
// Main game loop
game.update = function () {
	if (!gameStarted || gameOver) {
		return;
	}
	// Update bird
	bird.update();
	// Spawn pipes
	pipeSpawnTimer++;
	var currentDelay = pipes.length === 0 ? initialPipeSpawnDelay : pipeSpawnDelay;
	if (pipeSpawnTimer >= currentDelay) {
		spawnPipe();
		pipeSpawnTimer = 0;
	}
	// Spawn clouds
	cloudSpawnTimer++;
	if (cloudSpawnTimer >= cloudSpawnDelay) {
		spawnCloud();
		cloudSpawnTimer = 0;
	}
	// Update clouds
	for (var c = 0; c < clouds.length; c++) {
		clouds[c].update();
	}
	// Cleanup off-screen clouds
	for (var c = clouds.length - 1; c >= 0; c--) {
		var cloud = clouds[c];
		if (cloud.x < -300) {
			cloud.destroy();
			clouds.splice(c, 1);
		}
	}
	// Update pipes
	for (var i = 0; i < pipes.length; i++) {
		pipes[i].update();
	}
	// Ground is now fixed in GUI layer, no scrolling needed
	// Check collisions
	if (checkCollisions()) {
		gameOver = true;
		LK.getSound('hit').play();
		LK.showGameOver();
		return;
	}
	// Update score
	updateScore();
	// Cleanup off-screen pipes
	cleanupPipes();
};