/****
* Classes
****/
// The assets will be automatically created and loaded by the LK engine
// Create a class for the curling stone
var CurlingStone = Container.expand(function () {
  var self = Container.call(this);
  var stoneGraphics = self.attachAsset('stone', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 0;
  self.direction = 0;
  self.update = function () {
    self.x += Math.cos(self.direction) * self.speed;
    self.y += Math.sin(self.direction) * self.speed;
    self.speed *= 0.99; // friction
    if (self.speed < 0.1) self.speed = 0;
  };
  self.throw = function (speed, direction) {
    self.speed = speed;
    self.direction = direction;
  };
});
// Create a class for the target
var Target = Container.expand(function () {
  var self = Container.call(this);
  var targetGraphics = self.attachAsset('target', {
    anchorX: 0.5,
    anchorY: 0.5
  });
});

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

/****
* Game Code
****/
// Initialize the curling stone and the target
var stone = game.addChild(new CurlingStone());
stone.x = 2048 / 2;
stone.y = 2732 - 200;
var target = game.addChild(new Target());
target.x = 2048 / 2;
target.y = 200;
// Initialize the game state
var throwing = false;
var throwStart = null;
// Handle touch events
game.down = function (x, y, obj) {
  throwing = true;
  throwStart = {
    x: x,
    y: y
  };
};
game.up = function (x, y, obj) {
  if (throwing) {
    var dx = x - throwStart.x;
    var dy = y - throwStart.y;
    var speed = Math.sqrt(dx * dx + dy * dy) / 100;
    var direction = Math.atan2(dy, dx);
    stone.throw(speed, direction);
    throwing = false;
  }
};
// Update the game state
game.update = function () {
  if (stone.intersects(target)) {
    LK.showGameOver();
  }
};