let board = [];
let currentScore = 0;

const loggedInUser = sessionStorage.getItem("loggedInUser");

const currentUser = loggedInUser || "guest";

const storageKey = 'highScore2048_' + currentUser;

let highScore = 0;

if (loggedInUser) {
  highScore = parseInt(localStorage.getItem(storageKey)) || 0;
} else {
  highScore = 0;
}

let lastMoveDir = null;
let isMoving = false;
let mergesInCurrentMove = 0;

let soundState = {
  bg: localStorage.getItem('sound_bg') !== 'false',
  pop: localStorage.getItem('sound_pop') !== 'false',
  merge: localStorage.getItem('sound_merge') !== 'false'
};

let volumeState = {
  music: parseInt(localStorage.getItem('vol_music')) || 25,
  pop: parseInt(localStorage.getItem('vol_pop')) || 90,
  merge: parseInt(localStorage.getItem('vol_merge')) || 100
};