/****
* Classes
****/
// Sheep class
var Sheep = Container.expand(function () {
  var self = Container.call(this);
  var sheepGraphics = self.attachAsset('sheep', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 1;
  self.direction = Math.random() * Math.PI * 2;
  self.move = function () {
    self.x += Math.cos(self.direction) * self.speed;
    self.y += Math.sin(self.direction) * self.speed;
  };
  self.avoidWalls = function () {
    if (self.x < 50 || self.x > 1998 || self.y < 50 || self.y > 2682) {
      self.direction += Math.PI;
    }
  };
  self.avoidDog = function (dog) {
    if (self.intersects(dog)) {
      self.direction += Math.PI / 2;
    }
  };
});
// Shepherd dog class
var Dog = Container.expand(function () {
  var self = Container.call(this);
  var dogGraphics = self.attachAsset('dog', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function (pos) {
    self.x = pos.x;
    self.y = pos.y;
  };
});

/****
* Initialize Game
****/
var game = new LK.Game({
  backgroundColor: 0x87CEEB // Light blue background to represent the sky
});

/****
* Game Code
****/
// Initialize sheep array
// Sheep asset
// Shepherd dog asset
var sheepArray = [];
// Create 20 sheep and add them to the game and sheepArray
for (var i = 0; i < 20; i++) {
  var sheep = new Sheep();
  sheep.x = Math.random() * 2048;
  sheep.y = Math.random() * 2732;
  game.addChild(sheep);
  sheepArray.push(sheep);
}
// Create shepherd dog and add it to the game
var shepherdDog = new Dog();
shepherdDog.x = 1024; // Start in the middle of the game area
shepherdDog.y = 1366;
game.addChild(shepherdDog);
// Event listener for touch move to move the shepherd dog
game.on('move', function (obj) {
  var pos = obj.event.getLocalPosition(game);
  shepherdDog.move(pos);
});
// Main game tick event
LK.on('tick', function () {
  // Move each sheep
  for (var i = 0; i < sheepArray.length; i++) {
    var sheep = sheepArray[i];
    sheep.move();
    sheep.avoidWalls();
    sheep.avoidDog(shepherdDog);
  }
});
// Ensure the game is touchscreen compatible
game.on('down', function (obj) {
  var pos = obj.event.getLocalPosition(game);
  shepherdDog.move(pos);
});
game.on('up', function (obj) {
  // This can be used for future features where the dog stops moving on touch up
});