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

/**** 
* Classes
****/ 
var Car = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('car', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.hasShield = false;
	self.shieldAlpha = 1;
	self.activateShield = function () {
		self.hasShield = true;
		self.shieldAlpha = 1;
	};
	self.update = function () {
		if (self.hasShield) {
			self.shieldAlpha -= 0.008;
			if (self.shieldAlpha <= 0) {
				self.hasShield = false;
				carGraphics.alpha = 1;
			} else {
				carGraphics.alpha = 0.5 + self.shieldAlpha * 0.5;
				carGraphics.tint = 0x00D9FF;
			}
		} else {
			carGraphics.alpha = 1;
			carGraphics.tint = 0xFFFFFF;
		}
	};
	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.y += self.speed;
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	self.type = 'speed';
	var powerUpGraphics = self.attachAsset('powerUpSpeed', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.rotation = 0;
	self.update = function () {
		self.y += self.speed;
		self.rotation += 0.05;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
var car = game.addChild(new Car());
car.x = 2048 / 2;
car.y = 2400;
var obstacles = [];
var powerups = [];
var gameSpeed = 8;
var gameSpeedMax = 18;
var spawnRate = 40;
var score = 0;
var isGameActive = true;
var hasCollided = false;
var scoreTxt = new Text2('Score: 0', {
	size: 100,
	fill: '#FFFFFF'
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var speedTxt = new Text2('Speed: 1.0x', {
	size: 80,
	fill: '#FFD700'
});
speedTxt.anchor.set(0.5, 0);
speedTxt.y = 120;
LK.gui.top.addChild(speedTxt);
var trackLeft = 200;
var trackRight = 1848;
var laneWidth = (trackRight - trackLeft) / 3;
var touchX = car.x;
game.down = function (x, y, obj) {
	touchX = x;
};
game.move = function (x, y, obj) {
	if (!isGameActive) return;
	touchX = x;
	var newX = touchX;
	if (newX < trackLeft) newX = trackLeft;
	if (newX > trackRight) newX = trackRight;
	car.x = newX;
};
game.up = function (x, y, obj) {};
function spawnObstacle() {
	var newObstacle = new Obstacle();
	var lane = Math.floor(Math.random() * 3);
	newObstacle.x = trackLeft + lane * laneWidth + laneWidth / 2;
	newObstacle.y = -100;
	newObstacle.speed = gameSpeed;
	newObstacle.lastY = newObstacle.y;
	newObstacle.lastIntersecting = false;
	obstacles.push(newObstacle);
	game.addChild(newObstacle);
}
function spawnPowerUp() {
	var newPowerUp = new PowerUp();
	var lane = Math.floor(Math.random() * 3);
	newPowerUp.x = trackLeft + lane * laneWidth + laneWidth / 2;
	newPowerUp.y = -100;
	newPowerUp.speed = gameSpeed;
	var powerType = Math.random();
	if (powerType < 0.6) {
		newPowerUp.type = 'speed';
		newPowerUp.attachAsset('powerUpSpeed', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	} else {
		newPowerUp.type = 'shield';
		newPowerUp.attachAsset('powerUpShield', {
			anchorX: 0.5,
			anchorY: 0.5
		});
	}
	newPowerUp.lastY = newPowerUp.y;
	newPowerUp.lastIntersecting = false;
	powerups.push(newPowerUp);
	game.addChild(newPowerUp);
}
game.update = function () {
	if (!isGameActive) return;
	score += 1;
	scoreTxt.setText('Score: ' + Math.floor(score / 10));
	if (LK.ticks % 600 === 0 && gameSpeed < gameSpeedMax) {
		gameSpeed += 1;
		spawnRate = Math.max(25, spawnRate - 2);
	}
	var speedMultiplier = gameSpeed / 8;
	speedTxt.setText('Speed: ' + speedMultiplier.toFixed(1) + 'x');
	if (LK.ticks % spawnRate === 0) {
		spawnObstacle();
	}
	if (LK.ticks % 150 === 0) {
		spawnPowerUp();
	}
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		if (obstacle.lastY === undefined) obstacle.lastY = obstacle.y;
		if (obstacle.lastIntersecting === undefined) obstacle.lastIntersecting = false;
		if (obstacle.lastY >= -50 && obstacle.y < -50) {
			obstacle.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		var currentIntersecting = obstacle.intersects(car);
		if (!obstacle.lastIntersecting && currentIntersecting) {
			if (!car.hasShield) {
				isGameActive = false;
				LK.getSound('collision').play();
				LK.effects.flashScreen(0xFF0000, 500);
				LK.setScore(Math.floor(score / 10));
				LK.showGameOver();
				return;
			} else {
				car.hasShield = false;
				car.shieldAlpha = 0;
				LK.getSound('powerup').play();
				obstacle.destroy();
				obstacles.splice(i, 1);
				continue;
			}
		}
		obstacle.lastY = obstacle.y;
		obstacle.lastIntersecting = currentIntersecting;
	}
	for (var j = powerups.length - 1; j >= 0; j--) {
		var powerup = powerups[j];
		if (powerup.lastY === undefined) powerup.lastY = powerup.y;
		if (powerup.lastIntersecting === undefined) powerup.lastIntersecting = false;
		if (powerup.lastY >= -50 && powerup.y < -50) {
			powerup.destroy();
			powerups.splice(j, 1);
			continue;
		}
		var powerupIntersecting = powerup.intersects(car);
		if (!powerup.lastIntersecting && powerupIntersecting) {
			if (powerup.type === 'speed') {
				gameSpeed = Math.min(gameSpeedMax, gameSpeed + 3);
			} else if (powerup.type === 'shield') {
				car.activateShield();
			}
			LK.getSound('powerup').play();
			score += 50;
			powerup.destroy();
			powerups.splice(j, 1);
			continue;
		}
		powerup.lastY = powerup.y;
		powerup.lastIntersecting = powerupIntersecting;
	}
};
LK.playMusic('bgmusic', {
	loop: true
});