/****
* Classes
****/
// Player class
var Player = Container.expand(function () {
  var self = Container.call(this);
  var playerGraphics = self.attachAsset('player', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.move = function (x, y) {
    self.x = x;
    self.y = y;
  };
});
// Enemy class
var Enemy = Container.expand(function () {
  var self = Container.call(this);
  var enemyGraphics = self.attachAsset('enemy', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 2;
  self.move = function () {
    self.y += self.speed;
  };
});
// Laser class
var Laser = Container.expand(function () {
  var self = Container.call(this);
  var laserGraphics = self.attachAsset('laser', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -5;
  self.move = function () {
    self.y += self.speed;
  };
});

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

/****
* Game Code
****/
// Initialize player, enemy, and laser assets for the game.
var player = game.addChild(new Player());
player.x = 1024; // Center horizontally
player.y = 2500; // Position towards the bottom
var enemies = [];
var lasers = [];
// Create enemies at intervals
var enemySpawnTimer = LK.setInterval(function () {
  var enemy = new Enemy();
  enemy.x = Math.random() * 2048; // Random horizontal position
  enemy.y = 0; // Start at the top
  enemies.push(enemy);
  game.addChild(enemy);
}, 2000);
// Handle touch move to control player
game.on('move', function (obj) {
  var pos = obj.event.getLocalPosition(game);
  player.move(pos.x, pos.y);
});
// Fire lasers at intervals
var laserFireTimer = LK.setInterval(function () {
  var laser = new Laser();
  laser.x = player.x;
  laser.y = player.y - 30; // Start slightly above the player
  lasers.push(laser);
  game.addChild(laser);
}, 500);
// Main game loop
LK.on('tick', function () {
  // Move enemies
  for (var i = enemies.length - 1; i >= 0; i--) {
    enemies[i].move();
    // Remove enemies that go off screen
    if (enemies[i].y > 2732) {
      enemies[i].destroy();
      enemies.splice(i, 1);
    }
  }
  // Move lasers
  for (var j = lasers.length - 1; j >= 0; j--) {
    lasers[j].move();
    // Remove lasers that go off screen
    if (lasers[j].y < 0) {
      lasers[j].destroy();
      lasers.splice(j, 1);
    }
  }
  // Check for collisions between lasers and enemies
  for (var k = lasers.length - 1; k >= 0; k--) {
    for (var l = enemies.length - 1; l >= 0; l--) {
      if (lasers[k].intersects(enemies[l])) {
        // Destroy both laser and enemy on collision
        lasers[k].destroy();
        lasers.splice(k, 1);
        enemies[l].destroy();
        enemies.splice(l, 1);
        break; // Exit the inner loop after a collision
      }
    }
  }
});