/****
* Classes
****/
// Food class to manage food behavior
var Food = Container.expand(function () {
  var self = Container.call(this);
  var foodGraphics = self.attachAsset('food', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  // Randomly position the food
  self.randomizePosition = function () {
    self.x = Math.floor(Math.random() * 40) * 50;
    self.y = Math.floor(Math.random() * 54) * 50;
  };
  return self;
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Snake class to manage the snake's behavior
var Snake = Container.expand(function () {
  var self = Container.call(this);
  self.segments = [];
  self.direction = {
    x: 1,
    y: 0
  }; // Initial direction: right
  self.speed = 5;
  self.growth = 0;
  // Initialize the snake with a few segments
  for (var i = 0; i < 5; i++) {
    var segment = self.attachAsset('snakeSegment', {
      anchorX: 0.5,
      anchorY: 0.5
    });
    segment.x = 1024 + i * 20;
    segment.y = 1366;
    self.segments.push(segment);
  }
  // Update the snake's position
  self.update = function () {
    // Move the snake
    for (var i = self.segments.length - 1; i > 0; i--) {
      self.segments[i].x = self.segments[i - 1].x;
      self.segments[i].y = self.segments[i - 1].y;
    }
    self.segments[0].x += self.direction.x * self.speed;
    self.segments[0].y += self.direction.y * self.speed;
    // Check for growth
    if (self.growth > 0) {
      var newSegment = self.attachAsset('snakeSegment', {
        anchorX: 0.5,
        anchorY: 0.5
      });
      var lastSegment = self.segments[self.segments.length - 1];
      newSegment.x = lastSegment.x;
      newSegment.y = lastSegment.y;
      self.segments.push(newSegment);
      self.growth--;
    }
  };
  // Change the direction of the snake
  self.changeDirection = function (newDirection) {
    if ((newDirection.x !== -self.direction.x || newDirection.y !== -self.direction.y) && (newDirection.x !== self.direction.x || newDirection.y !== self.direction.y)) {
      self.direction = newDirection;
    }
  };
  // Grow the snake
  self.grow = function () {
    self.growth += 1;
  };
  return self;
});

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

/****
* Game Code
****/
// Initialize snake and food
var snake = game.addChild(new Snake());
var food = game.addChild(new Food());
food.randomizePosition();
// Handle game updates
game.update = function () {
  snake.update();
  // Check for collision with food
  if (snake.segments[0].intersects(food)) {
    snake.grow();
    food.randomizePosition();
    LK.setScore(LK.getScore() + 1);
    // Increase speed every 5 points
    if (LK.getScore() % 5 === 0) {
      snake.speed *= 1.1;
    }
  }
  // Check for collision with self or boundaries
  for (var i = 1; i < snake.segments.length; i++) {
    if (snake.segments[0].intersects(snake.segments[i])) {
      LK.showGameOver();
    }
  }
  if (snake.segments[0].x < 0 || snake.segments[0].x > 2048 || snake.segments[0].y < 0 || snake.segments[0].y > 2732) {
    LK.showGameOver();
  }
};
// Handle input for direction change
game.down = function (x, y, obj) {
  var direction = {
    x: 0,
    y: 0
  };
  if (x < 1024) {
    direction.x = -1;
  } else if (x > 1024) {
    direction.x = 1;
  }
  if (y < 1366) {
    direction.y = -1;
  } else if (y > 1366) {
    direction.y = 1;
  }
  snake.changeDirection(direction);
};