/****
* Classes
****/
// Food class to manage the food's position
var Food = Container.expand(function () {
  var self = Container.call(this);
  var foodGraphic = self.attachAsset('food', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  // Randomly position the food on the screen
  self.randomizePosition = function () {
    self.x = Math.floor(Math.random() * 2048);
    self.y = Math.floor(Math.random() * 2732);
  };
});
// Assets will be automatically created and loaded by the LK engine based on their usage in the code.
// For example, the snake and food will be represented by shapes or images initialized dynamically.
// Snake class to manage the snake's body and movement
var Snake = Container.expand(function () {
  var self = Container.call(this);
  self.body = [];
  self.direction = {
    x: 0,
    y: -1
  }; // Initial direction: moving up
  self.speed = 10; // Speed of the snake
  // Initialize the snake with a starting length
  self.init = function (length) {
    for (var i = 0; i < length; i++) {
      var segment = self.attachAsset('snakeSegment', {
        anchorX: 0.5,
        anchorY: 0.5
      });
      segment.x = 1024; // Center of the screen
      segment.y = 1366 + i * 20; // Stacked vertically
      self.body.push(segment);
    }
  };
  // Update the snake's position
  self.update = function () {
    // Move the body segments
    for (var i = self.body.length - 1; i > 0; i--) {
      self.body[i].x = self.body[i - 1].x;
      self.body[i].y = self.body[i - 1].y;
    }
    // Move the head
    self.body[0].x += self.direction.x * self.speed;
    self.body[0].y += self.direction.y * self.speed;
  };
  // Grow the snake by adding a new segment
  self.grow = function () {
    var lastSegment = self.body[self.body.length - 1];
    var newSegment = self.attachAsset('snakeSegment', {
      anchorX: 0.5,
      anchorY: 0.5
    });
    newSegment.x = lastSegment.x;
    newSegment.y = lastSegment.y;
    self.body.push(newSegment);
  };
  // Check if the snake has collided with itself
  self.checkSelfCollision = function () {
    var head = self.body[0];
    for (var i = 1; i < self.body.length; i++) {
      if (head.x === self.body[i].x && head.y === self.body[i].y) {
        return true;
      }
    }
    return false;
  };
});

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

/****
* Game Code
****/
var snake = new Snake();
var food = new Food();
var scoreTxt = new Text2('0', {
  size: 150,
  fill: "#ffffff"
});
var score = 0;
// Initialize the snake and food
snake.init(5);
food.randomizePosition();
// Add snake and food to the game
game.addChild(snake);
game.addChild(food);
// Add score text to the GUI
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Handle touch events to change snake direction
game.down = function (x, y, obj) {
  var head = snake.body[0];
  if (x < head.x) {
    snake.direction = {
      x: -1,
      y: 0
    }; // Move left
  } else if (x > head.x) {
    snake.direction = {
      x: 1,
      y: 0
    }; // Move right
  } else if (y < head.y) {
    snake.direction = {
      x: 0,
      y: -1
    }; // Move up
  } else if (y > head.y) {
    snake.direction = {
      x: 0,
      y: 1
    }; // Move down
  }
};
// Update game logic
game.update = function () {
  snake.update();
  // Check for collision with food
  if (snake.body[0].x === food.x && snake.body[0].y === food.y) {
    snake.grow();
    food.randomizePosition();
    score++;
    scoreTxt.setText(score);
  }
  // Check for self-collision
  if (snake.checkSelfCollision()) {
    LK.effects.flashScreen(0xff0000, 1000);
    LK.showGameOver();
  }
  // Check for collision with walls
  var head = snake.body[0];
  if (head.x < 0 || head.x > 2048 || head.y < 0 || head.y > 2732) {
    LK.effects.flashScreen(0xff0000, 1000);
    LK.showGameOver();
  }
};