/****
* Classes
****/
// Bullet class
var Bullet = Container.expand(function () {
  var self = Container.call(this);
  var bulletGraphics = self.attachAsset('bullet', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 15;
  self.update = function () {
    self.y -= self.speed;
  };
});
//<Write imports for supported plugins here>
// Player class
var Player = Container.expand(function () {
  var self = Container.call(this);
  var playerGraphics = self.attachAsset('player', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 10;
  self.health = 100;
  self.update = function () {
    // Update player position based on input
  };
  self.takeDamage = function (amount) {
    self.health -= amount;
    if (self.health <= 0) {
      LK.showGameOver();
    }
  };
});
// Zombie class
var Zombie = Container.expand(function () {
  var self = Container.call(this);
  var zombieGraphics = self.attachAsset('zombie', {
    anchorX: 0.5,
    anchorY: 0.5
  });
  self.speed = 2;
  self.update = function () {
    // Move towards player
  };
});

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

/****
* Game Code
****/
// Initialize player
// Initialize assets used in this game.
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 - 150;
// Initialize health bar
var healthBar = LK.getAsset('healthBar', {
  anchorX: 0.5,
  anchorY: 0.5
});
healthBar.x = 2048 / 2;
healthBar.y = 50;
game.addChild(healthBar);
// Initialize score
var score = 0;
var scoreTxt = new Text2('Score: 0', {
  size: 100,
  fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Arrays to keep track of bullets and zombies
var bullets = [];
var zombies = [];
// Function to spawn zombies
function spawnZombie() {
  var zombie = new Zombie();
  zombie.x = Math.random() * 2048;
  zombie.y = 0;
  zombies.push(zombie);
  game.addChild(zombie);
}
// Function to handle shooting
function shootBullet() {
  var bullet = new Bullet();
  bullet.x = player.x;
  bullet.y = player.y;
  bullets.push(bullet);
  game.addChild(bullet);
  LK.getSound('shoot').play();
}
// Game update loop
game.update = function () {
  // Update player
  player.update();
  // Update bullets
  for (var i = bullets.length - 1; i >= 0; i--) {
    bullets[i].update();
    if (bullets[i].y < 0) {
      bullets[i].destroy();
      bullets.splice(i, 1);
    }
  }
  // Update zombies
  for (var j = zombies.length - 1; j >= 0; j--) {
    zombies[j].update();
    if (zombies[j].intersects(player)) {
      player.takeDamage(10);
      zombies[j].destroy();
      zombies.splice(j, 1);
      LK.getSound('zombieHit').play();
    }
  }
  // Check for bullet-zombie collisions
  for (var k = bullets.length - 1; k >= 0; k--) {
    for (var l = zombies.length - 1; l >= 0; l--) {
      if (bullets[k].intersects(zombies[l])) {
        score += 10;
        scoreTxt.setText('Score: ' + score);
        bullets[k].destroy();
        zombies[l].destroy();
        bullets.splice(k, 1);
        zombies.splice(l, 1);
        break;
      }
    }
  }
  // Spawn zombies periodically
  if (LK.ticks % 60 === 0) {
    spawnZombie();
  }
};
// Event listeners for player controls
game.down = function (x, y, obj) {
  shootBullet();
};
game.move = function (x, y, obj) {
  player.x = x;
  player.y = y;
};