/****
* Classes
****/
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Bird class representing the player-controlled character
var Bird = Container.expand(function () {
  var self = Container.call(this);
  var birdGraphics = self.attachAsset('bird', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.velocity = 0;
  self.gravity = 0.5;
  self.flapStrength = -10;
  // Update method for bird movement
  self.update = function () {
    self.velocity += self.gravity;
    self.y += self.velocity;
  };
  // Flap method to make the bird jump
  self.flap = function () {
    self.velocity = self.flapStrength;
  };
});
// Obstacle class representing the pipes
var Obstacle = Container.expand(function () {
  var self = Container.call(this);
  var topPipe = self.attachAsset('pipe', {
    anchorX: 0.5,
    anchorY: 1
  });
  var bottomPipe = self.attachAsset('pipe', {
    anchorX: 0.5,
    anchorY: 0
  });
  self.speed = -5;
  self.gap = 400;
  // Randomize the gap position
  self.randomizePosition = function () {
    var gapPosition = Math.random() * (2048 - self.gap - 200) + 100;
    topPipe.y = gapPosition - self.gap / 2;
    bottomPipe.y = gapPosition + self.gap / 2;
  };
  // Update method for obstacle movement
  self.update = function () {
    self.x += self.speed;
  };
});

/****
* Initialize Game
****/
var game = new LK.Game({
  backgroundColor: 0x87CEEB // Sky blue background
});

/****
* Game Code
****/
// Initialize game variables
var bird = game.addChild(new Bird());
bird.x = 300;
bird.y = 1366; // Center vertically
var obstacles = [];
var score = 0;
var scoreTxt = new Text2('0', {
  size: 150,
  fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Function to create a new obstacle
function createObstacle() {
  var obstacle = new Obstacle();
  obstacle.x = 2048;
  obstacle.randomizePosition();
  obstacles.push(obstacle);
  game.addChild(obstacle);
}
// Handle game touch events
game.down = function (x, y, obj) {
  bird.flap();
};
// Update game logic
game.update = function () {
  bird.update();
  // Check for collisions and update obstacles
  for (var i = obstacles.length - 1; i >= 0; i--) {
    obstacles[i].update();
    // Check for collision with bird
    if (bird.intersects(obstacles[i])) {
      LK.effects.flashScreen(0xff0000, 1000);
      LK.showGameOver();
    }
    // Remove off-screen obstacles and update score
    if (obstacles[i].x < -100) {
      obstacles[i].destroy();
      obstacles.splice(i, 1);
      score++;
      scoreTxt.setText(score);
    }
  }
  // Add new obstacles periodically
  if (LK.ticks % 90 == 0) {
    createObstacle();
  }
  // Check if bird hits the ground or flies too high
  if (bird.y > 2732 || bird.y < 0) {
    LK.effects.flashScreen(0xff0000, 1000);
    LK.showGameOver();
  }
};