/****
* Classes
****/
// Boost class representing speed boosts
var Boost = Container.expand(function () {
  var self = Container.call(this);
  var boostGraphics = self.attachAsset('boost', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.update = function () {
    self.y += 5;
  };
});
//<Assets used in the game will automatically appear here>
// Car class representing the player's car
var Car = Container.expand(function () {
  var self = Container.call(this);
  var carGraphics = self.attachAsset('car', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 0;
  self.update = function () {
    self.y += self.speed;
  };
});
// Traffic class representing other cars on the road
var Traffic = Container.expand(function () {
  var self = Container.call(this);
  var trafficGraphics = self.attachAsset('traffic', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.update = function () {
    self.y += self.speed;
  };
});

/****
* Initialize Game
****/
var game = new LK.Game({
  backgroundColor: 0x000000 //Init game with black background 
});

/****
* Game Code
****/
// Initialize player car
var playerCar = new Car();
playerCar.x = 2048 / 2;
playerCar.y = 2732 - 200;
game.addChild(playerCar);
// Arrays to keep track of traffic and boosts
var trafficCars = [];
var boosts = [];
// Score display
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Game update function
game.update = function () {
  // Update player car position
  playerCar.update();
  // Update traffic cars
  for (var i = trafficCars.length - 1; i >= 0; i--) {
    trafficCars[i].update();
    if (trafficCars[i].y > 2732) {
      trafficCars[i].destroy();
      trafficCars.splice(i, 1);
    }
    if (playerCar.intersects(trafficCars[i])) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
  }
  // Update boosts
  for (var j = boosts.length - 1; j >= 0; j--) {
    boosts[j].update();
    if (boosts[j].y > 2732) {
      boosts[j].destroy();
      boosts.splice(j, 1);
    }
    if (playerCar.intersects(boosts[j])) {
      playerCar.speed += 2;
      boosts[j].destroy();
      boosts.splice(j, 1);
    }
  }
  // Spawn new traffic cars
  if (LK.ticks % 60 == 0) {
    var newTraffic = new Traffic();
    newTraffic.x = Math.random() * 2048;
    newTraffic.y = -100;
    trafficCars.push(newTraffic);
    game.addChild(newTraffic);
  }
  // Spawn new boosts
  if (LK.ticks % 300 == 0) {
    var newBoost = new Boost();
    newBoost.x = Math.random() * 2048;
    newBoost.y = -100;
    boosts.push(newBoost);
    game.addChild(newBoost);
  }
  // Update score
  LK.setScore(LK.getScore() + 1);
  scoreTxt.setText(LK.getScore());
};
// Handle player car movement
game.move = function (x, y, obj) {
  playerCar.x = x;
};
// Start the game
game.down = function (x, y, obj) {
  playerCar.speed = 10;
};
// Stop the car when touch is released
game.up = function (x, y, obj) {
  playerCar.speed = 0;
};