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

/**** 
* Classes
****/ 
// Bird class
var Bird = Container.expand(function () {
	var self = Container.call(this);
	// Attach bird asset (yellow ellipse)
	var birdAsset = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set initial properties
	self.vy = 0; // vertical velocity
	self.gravity = 0.5; // gravity per frame (further reduced for even slower falling)
	self.flapStrength = -18; // negative for upward movement (lower jump)
	// Bird update: apply gravity, move, clamp position
	self.update = function () {
		self.vy += self.gravity;
		self.y += self.vy;
		// Clamp to top of screen (use ellipse top)
		if (self.y < self.height / 2 * 0.82) {
			self.y = self.height / 2 * 0.82;
			self.vy = 0;
		}
	};
	// Flap: set upward velocity
	self.flap = function () {
		self.vy = self.flapStrength;
	};
	return self;
});
// PipePair class (top and bottom pipes)
var PipePair = Container.expand(function () {
	var self = Container.call(this);
	// Pipe config
	self.pipeWidth = 400;
	self.gapHeight = 900; // Reduced gap for harder gameplay
	self.speed = 7;
	// Create top pipe (green box)
	self.topPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 1,
		width: self.pipeWidth,
		height: 900
	});
	self.topPipe.rotation = Math.PI;
	// Create bottom pipe (green box)
	self.bottomPipe = self.attachAsset('pipe', {
		anchorX: 0.5,
		anchorY: 0,
		width: self.pipeWidth,
		height: 900
	});
	// Set initial positions (will be set by spawn)
	self.topPipe.x = 0;
	self.bottomPipe.x = 0;
	// Used to track if score was already given for this pipe
	self.passed = false;
	// Set pipes' vertical positions based on gapY
	self.setGap = function (gapY) {
		self.topPipe.y = 0; // Touch the ceiling
		self.bottomPipe.y = gapY + self.gapHeight / 2;
	};
	// Move pipes left
	self.update = function () {
		self.x -= self.speed;
	};
	// Helper: get bounding rect for collision
	self.getTopRect = function () {
		return new Rectangle(self.x - self.pipeWidth / 2, 0, self.pipeWidth, self.topPipe.y);
	};
	self.getBottomRect = function () {
		return new Rectangle(self.x - self.pipeWidth / 2, self.bottomPipe.y, self.pipeWidth, 2732 - self.bottomPipe.y);
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb // Sky blue
});

/**** 
* Game Code
****/ 
// --- Game Variables ---
// --- Asset Initialization ---
var bird;
var pipes = [];
var ground;
var score = 0;
var scoreTxt;
var gameStarted = false;
var gameOver = false;
var pipeTimer = null;
var lastPipeX = 0;
var nextPipeDist = 0;
var bestScore = 0;
// --- GUI Score Display ---
scoreTxt = new Text2('0', {
	size: 180,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// --- Best Score Display (top right) ---
var bestScoreTxt = new Text2('', {
	size: 60,
	fill: 0xFFF7B2
});
bestScoreTxt.anchor.set(1, 0);
bestScoreTxt.x = -60;
bestScoreTxt.y = 30;
LK.gui.topRight.addChild(bestScoreTxt);
// --- Ground ---
ground = LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 2732 - 120
});
game.addChild(ground);
// --- Bird ---
bird = new Bird();
bird.x = 500;
bird.y = 2732 / 2;
game.addChild(bird);
// --- Reset Game State ---
function resetGame() {
	// Remove pipes
	for (var i = 0; i < pipes.length; i++) {
		pipes[i].destroy();
	}
	pipes = [];
	// Reset bird
	bird.x = 500;
	bird.y = 2732 / 2;
	bird.vy = 0;
	// Reset score
	score = 0;
	scoreTxt.setText(score);
	// Reset state
	gameStarted = false;
	gameOver = false;
	// Show best score
	bestScore = bestScore || 0;
	bestScoreTxt.setText('Best: ' + bestScore);
	// Remove pipe timer if any
	if (pipeTimer) {
		LK.clearInterval(pipeTimer);
		pipeTimer = null;
	}
}
// --- Start Game ---
function startGame() {
	if (gameStarted) return;
	gameStarted = true;
	gameOver = false;
	score = 0;
	scoreTxt.setText(score);
	// Remove pipes
	for (var i = 0; i < pipes.length; i++) {
		pipes[i].destroy();
	}
	pipes = [];
	// Reset bird
	bird.x = 500;
	bird.y = 2732 / 2;
	bird.vy = 0;
	// Start pipe spawning
	spawnPipe();
	if (pipeTimer) LK.clearInterval(pipeTimer);
	pipeTimer = LK.setInterval(spawnPipe, 1100);
}
// --- End Game ---
function endGame() {
	if (gameOver) return;
	gameOver = true;
	gameStarted = false;
	// Stop pipe spawning
	if (pipeTimer) {
		LK.clearInterval(pipeTimer);
		pipeTimer = null;
	}
	// Flash screen
	LK.effects.flashScreen(0xff0000, 600);
	// Update best score
	if (score > bestScore) {
		bestScore = score;
	}
	bestScoreTxt.setText('Best: ' + bestScore);
	// Show game over popup (handled by LK)
	LK.showGameOver();
}
// --- Pipe Spawning ---
function spawnPipe() {
	// Gap vertical position: slightly above the vertical center of the screen
	var gapY = 2732 / 2 - 250;
	var pipePair = new PipePair();
	pipePair.x = 2048 + pipePair.pipeWidth; // Spawn just off right edge
	pipePair.setGap(gapY);
	game.addChild(pipePair);
	pipes.push(pipePair);
}
// --- Collision Detection ---
function rectsIntersect(ax, ay, aw, ah, bx, by, bw, bh) {
	return ax < bx + bw && ax + aw > bx && ay < by + bh && ay + ah > by;
}
// --- Game Update Loop ---
game.update = function () {
	if (!gameStarted) return;
	// Bird update
	bird.update();
	// Ground collision (use ellipse bottom)
	if (bird.y + bird.height / 2 * 0.82 >= 2732 - 120) {
		bird.y = 2732 - 120 - bird.height / 2 * 0.82;
		endGame();
		return;
	}
	// Pipe update and collision
	var _loop = function _loop() {
			pipe = pipes[i];
			pipe.update();
			// Remove pipes off screen
			if (pipe.x < -pipe.pipeWidth) {
				pipe.destroy();
				pipes.splice(i, 1);
				return 0; // continue
			}
			// Collision with pipes
			// Bird ellipse center and radii
			birdCx = bird.x;
			birdCy = bird.y;
			birdRx = bird.width / 2 * 0.82; // slightly smaller for visual fit
			birdRy = bird.height / 2 * 0.82; // Ellipse-rectangle collision helper
			function ellipseRectCollides(cx, cy, rx, ry, rx1, ry1, rw, rh) {
				// Find closest point on rectangle to ellipse center
				var closestX = Math.max(rx1, Math.min(cx, rx1 + rw));
				var closestY = Math.max(ry1, Math.min(cy, ry1 + rh));
				// Compute normalized distance
				var dx = (closestX - cx) / rx;
				var dy = (closestY - cy) / ry;
				return dx * dx + dy * dy <= 1;
			}
			// Top pipe
			topRect = pipe.getTopRect();
			if (ellipseRectCollides(birdCx, birdCy, birdRx, birdRy, topRect.x, topRect.y, topRect.width, topRect.height)) {
				endGame();
				return {
					v: void 0
				};
			}
			// Bottom pipe
			bottomRect = pipe.getBottomRect();
			if (ellipseRectCollides(birdCx, birdCy, birdRx, birdRy, bottomRect.x, bottomRect.y, bottomRect.width, bottomRect.height)) {
				endGame();
				return {
					v: void 0
				};
			}
			// Score: if bird passed pipe center and not yet scored
			if (!pipe.passed && pipe.x + pipe.pipeWidth / 2 < bird.x - bird.width / 2) {
				pipe.passed = true;
				score += 1;
				scoreTxt.setText(score);
			}
		},
		pipe,
		birdCx,
		birdCy,
		birdRx,
		birdRy,
		topRect,
		bottomRect,
		_ret;
	for (var i = pipes.length - 1; i >= 0; i--) {
		_ret = _loop();
		if (_ret === 0) continue;
		if (_ret) return _ret.v;
	}
};
// --- Tap/Touch Controls ---
game.down = function (x, y, obj) {
	if (gameOver) {
		resetGame();
		return;
	}
	if (!gameStarted) {
		startGame();
	}
	bird.flap();
};
// --- Reset on Game Over ---
LK.on('gameover', function () {
	resetGame();
});
// --- Initial State ---
resetGame();