/**** 
* Classes
****/ 
// The assets will be automatically created and loaded by the LK engine based on their usage in the code.
// For this game, we will use a bird and pole shapes, and a background image for the forest.
// Bird class to represent the player-controlled bird
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 = 0.5;
	self.flapStrength = -8;
	// Update function to apply gravity and move the bird
	self.update = function () {
		self.velocity += self.gravity;
		self.y += self.velocity;
	};
	// Function to make the bird flap
	self.flap = function () {
		self.velocity = self.flapStrength;
	};
});
// Pole class to represent the obstacles
var Pole = Container.expand(function () {
	var self = Container.call(this);
	var poleGraphics = self.attachAsset('pole', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	// Update function to move the pole
	self.update = function () {
		self.x += self.speed;
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB // Set a sky blue background color
});

/**** 
* Game Code
****/ 
// Add the background image to the game
var background = game.attachAsset('background', {
	anchorX: 0.0,
	anchorY: 0.0,
	x: 0,
	y: 0
});
// Initialize game variables
var bird = game.addChild(new Bird());
bird.x = 2048 / 4;
bird.y = 2732 / 2;
var poles = [];
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Function to create a new pair of poles
function createPoles() {
	var gap = 400;
	var poleHeight = Math.random() * 800 + 400;
	var topPole = new Pole();
	topPole.x = 2048;
	topPole.y = poleHeight - 2732;
	poles.push(topPole);
	game.addChild(topPole);
	var bottomPole = new Pole();
	bottomPole.x = 2048;
	bottomPole.y = poleHeight + gap;
	poles.push(bottomPole);
	game.addChild(bottomPole);
}
// Handle screen tap to make the bird flap
game.down = function (x, y, obj) {
	bird.flap();
};
// Update game logic
game.update = function () {
	bird.update();
	// Check for collision with ground or ceiling
	if (bird.y > 2732 || bird.y < 0) {
		LK.showGameOver();
	}
	// Update poles and check for collisions
	for (var i = poles.length - 1; i >= 0; i--) {
		poles[i].update();
		// Check for collision with bird
		if (bird.intersects(poles[i])) {
			LK.showGameOver();
		}
		// Remove poles that have moved off screen
		if (poles[i].x < -100) {
			poles[i].destroy();
			poles.splice(i, 1);
			score++;
			scoreTxt.setText(score);
		}
	}
	// Create new poles periodically
	if (LK.ticks % 120 == 0) {
		createPoles();
	}
};