/****
* Classes
****/
// Class for Enemies
var Enemy = Container.expand(function () {
  var self = Container.call(this);
  var enemyGraphics = self.attachAsset('enemy', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 5;
  self.update = function () {
    self.y += self.speed;
    if (self.y > 2732 + enemyGraphics.height) {
      self.destroy();
    }
  };
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Class for the Hero character
var Hero = Container.expand(function () {
  var self = Container.call(this);
  var heroGraphics = self.attachAsset('hero', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 10;
  self.update = function () {
    // Update logic for hero
  };
  self.shoot = function () {
    var bullet = new HeroBullet();
    bullet.x = self.x;
    bullet.y = self.y - heroGraphics.height / 2;
    game.addChild(bullet);
    heroBullets.push(bullet);
  };
});
// Class for Hero's bullets
var HeroBullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('heroBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = -15;
  self.update = function () {
    self.y += self.speed;
    if (self.y < -bulletGraphics.height) {
      self.destroy();
    }
  };
});

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

/****
* Game Code
****/
// Initialize variables
var hero;
var heroBullets = [];
var enemies = [];
var score = 0;
// Create hero and add to game
hero = new Hero();
hero.x = 2048 / 2;
hero.y = 2732 - 150;
game.addChild(hero);
// Function to spawn enemies
function spawnEnemy() {
  var enemy = new Enemy();
  enemy.x = Math.random() * 2048;
  enemy.y = -50;
  game.addChild(enemy);
  enemies.push(enemy);
}
// Handle game updates
game.update = function () {
  // Update hero bullets
  for (var i = heroBullets.length - 1; i >= 0; i--) {
    heroBullets[i].update();
    if (heroBullets[i].y < -50) {
      heroBullets[i].destroy();
      heroBullets.splice(i, 1);
    }
  }
  // Update enemies
  for (var j = enemies.length - 1; j >= 0; j--) {
    enemies[j].update();
    if (enemies[j].y > 2732 + 50) {
      enemies[j].destroy();
      enemies.splice(j, 1);
    }
  }
  // Check for collisions between hero bullets and enemies
  for (var k = heroBullets.length - 1; k >= 0; k--) {
    for (var l = enemies.length - 1; l >= 0; l--) {
      if (heroBullets[k].intersects(enemies[l])) {
        heroBullets[k].destroy();
        enemies[l].destroy();
        heroBullets.splice(k, 1);
        enemies.splice(l, 1);
        score += 10;
        break;
      }
    }
  }
};
// Set interval to spawn enemies
LK.setInterval(spawnEnemy, 2000);
// Handle touch events for shooting
game.down = function (x, y, obj) {
  hero.shoot();
};