/****
* Classes
****/
// 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.update = function () {
    self.y += self.speed;
    if (self.y > 2732) {
      self.destroy();
      enemies.splice(enemies.indexOf(self), 1);
    }
  };
});
// HeroBullet class
var HeroBullet = Container.expand(function (x, y) {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('heroBullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.x = x;
  self.y = y;
  self.speed = -10;
  self.update = function () {
    self.y += self.speed;
    if (self.y < 0) {
      self.destroy();
      heroBullets.splice(heroBullets.indexOf(self), 1);
    }
  };
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Warrior class
var Warrior = Container.expand(function () {
  var self = Container.call(this);
  var warriorGraphics = self.attachAsset('warrior', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.strength = 1; // Initial strength
  self.shoot = function () {
    var bullet = new HeroBullet(self.x, self.y);
    game.addChild(bullet);
    heroBullets.push(bullet);
  };
});

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

/****
* Game Code
****/
// Initialize warrior
var warrior = new Warrior();
warrior.x = 2048 / 2;
warrior.y = 2732 / 2;
game.addChild(warrior);
// Arrays to keep track of bullets and enemies
var heroBullets = [];
var enemies = [];
// Game update loop
game.update = function () {
  // Update all hero bullets
  for (var i = heroBullets.length - 1; i >= 0; i--) {
    heroBullets[i].update();
  }
  // Update all enemies
  for (var j = enemies.length - 1; j >= 0; j--) {
    enemies[j].update();
  }
  // 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);
        warrior.strength += 1; // Increase warrior's strength
        break;
      }
    }
  }
  // Spawn new enemies
  if (LK.ticks % 60 == 0) {
    var enemy = new Enemy();
    enemy.x = Math.random() * 2048;
    enemy.y = 0;
    game.addChild(enemy);
    enemies.push(enemy);
  }
};
// Handle shooting
game.down = function (x, y, obj) {
  warrior.shoot();
};