/****
* Classes
****/
// Assets will be automatically created based on usage in the code.
// Car class
var Car = Container.expand(function () {
  var self = Container.call(this);
  // Attach a car asset
  var carGraphics = self.attachAsset('car', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speedX = 0;
  self.speedY = 0;
  // Move car based on its speed
  self.move = function () {
    self.x += self.speedX;
    self.y += self.speedY;
  };
  // Bounce off the edges of the screen
  self.checkBounds = function () {
    if (self.x < 0 || self.x > 2048) {
      self.speedX *= -1;
    }
    if (self.y < 0 || self.y > 2732) {
      self.speedY *= -1;
    }
  };
});

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

/****
* Game Code
****/
// Global variables
var cars = [];
// Create cars
for (var i = 0; i < 5; i++) {
  var car = new Car();
  car.x = Math.random() * 2048;
  car.y = Math.random() * 2732;
  car.speedX = Math.random() * 10 - 5;
  car.speedY = Math.random() * 10 - 5;
  cars.push(car);
  game.addChild(car);
}
// Handle game logic on each tick
LK.on('tick', function () {
  cars.forEach(function (car) {
    car.move();
    car.checkBounds();
    // Check for collisions with other cars
    cars.forEach(function (otherCar) {
      if (car !== otherCar && car.intersects(otherCar)) {
        // Simple collision response by swapping speeds
        var tempSpeedX = car.speedX;
        var tempSpeedY = car.speedY;
        car.speedX = otherCar.speedX;
        car.speedY = otherCar.speedY;
        otherCar.speedX = tempSpeedX;
        otherCar.speedY = tempSpeedY;
      }
    });
  });
});
// Touch event to add a new car at the touch location
game.on('down', function (obj) {
  var event = obj.event;
  var pos = event.getLocalPosition(game);
  var newCar = new Car();
  newCar.x = pos.x;
  newCar.y = pos.y;
  newCar.speedX = Math.random() * 10 - 5;
  newCar.speedY = Math.random() * 10 - 5;
  cars.push(newCar);
  game.addChild(newCar);
});