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

/**** 
* Classes
****/ 
var Car = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('car', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.targetY = 0;
	self.moveSpeed = 8;
	self.update = function () {
		// Smooth movement toward target position
		var diff = self.targetY - self.y;
		if (Math.abs(diff) > 2) {
			self.y += diff * 0.15;
		} else {
			self.y = self.targetY;
		}
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.update = function () {
		self.x -= self.speed * gameSpeed;
	};
	return self;
});
var Road = Container.expand(function () {
	var self = Container.call(this);
	var roadGraphics = self.attachAsset('road', {
		anchorX: 0,
		anchorY: 0.5
	});
	self.speed = 6;
	self.update = function () {
		self.x -= self.speed * gameSpeed;
		if (self.x <= -2048) {
			self.x += 4096;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2c3e50
});

/**** 
* Game Code
****/ 
var gameSpeed = 1;
var distanceTraveled = 0;
var lastSpeedIncrease = 0;
var obstacles = [];
var roadSegments = [];
var car;
var lastObstacleSpawn = 0;
var obstacleSpawnRate = 90;
// Create road segments
for (var i = 0; i < 3; i++) {
	var roadSegment = new Road();
	roadSegment.x = i * 2048;
	roadSegment.y = 2732 / 2;
	roadSegments.push(roadSegment);
	game.addChild(roadSegment);
}
// Create car - spawn from left edge
car = new Car();
car.x = -100; // Start off-screen to the left
car.y = 2732 / 2;
car.targetY = 2732 / 2;
game.addChild(car);
// Animate car entering from the left
tween(car, {
	x: 400
}, {
	duration: 1500
}); // Move to playing position over 1.5 seconds
// Create distance display
var distanceText = new Text2('0m', {
	size: 80,
	fill: 0xFFFFFF
});
distanceText.anchor.set(0.5, 0);
LK.gui.top.addChild(distanceText);
// Create speed display
var speedText = new Text2('Speed: 1.0x', {
	size: 60,
	fill: 0xFFFFFF
});
speedText.anchor.set(1, 0);
LK.gui.topRight.addChild(speedText);
function spawnObstacle() {
	var obstacle = new Obstacle();
	obstacle.x = 2200;
	// Spawn obstacles in upper or lower lane
	var lanes = [2732 / 2 - 200, 2732 / 2 + 200];
	obstacle.y = lanes[Math.floor(Math.random() * lanes.length)];
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
function handleInput(y) {
	var screenCenter = 2732 / 2;
	if (y < screenCenter) {
		// Move up
		car.targetY = 2732 / 2 - 200;
	} else {
		// Move down
		car.targetY = 2732 / 2 + 200;
	}
}
game.down = function (x, y, obj) {
	handleInput(y);
};
game.update = function () {
	// Update distance traveled
	distanceTraveled += gameSpeed * 0.5;
	distanceText.setText(Math.floor(distanceTraveled) + 'm');
	// Increase speed every 750 meters
	if (distanceTraveled - lastSpeedIncrease >= 750) {
		gameSpeed *= 1.5;
		lastSpeedIncrease = distanceTraveled;
		speedText.setText('Speed: ' + gameSpeed.toFixed(1) + 'x');
		// Increase obstacle spawn rate with speed
		obstacleSpawnRate = Math.max(40, obstacleSpawnRate - 10);
		// Flash effect for speed increase
		LK.effects.flashScreen(0xf39c12, 500);
	}
	// Spawn obstacles
	if (LK.ticks - lastObstacleSpawn > obstacleSpawnRate) {
		spawnObstacle();
		lastObstacleSpawn = LK.ticks;
	}
	// Update obstacles and check collisions
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		// Remove obstacles that are off screen
		if (obstacle.x < -200) {
			obstacle.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Check collision with car
		if (car.intersects(obstacle)) {
			LK.getSound('crash').play();
			LK.effects.flashScreen(0xe74c3c, 1000);
			LK.setScore(Math.floor(distanceTraveled));
			LK.showGameOver();
			return;
		}
	}
	// Check win condition at 5000 meters
	if (distanceTraveled >= 5000) {
		LK.setScore(Math.floor(distanceTraveled));
		LK.showYouWin();
		return;
	}
	// Update score
	LK.setScore(Math.floor(distanceTraveled));
};
LK.playMusic('bgmusic');