export type AuthStatus = 'authenticated' | 'guest' | null;

const KEY = 'han_auth_status';

function safeGet(key: string): string | null {
  try { return localStorage.getItem(key); } catch { return null; }
}

function safeSet(key: string, value: string) {
  try { localStorage.setItem(key, value); } catch { /* ignore */ }
}

function safeRemove(key: string) {
  try { localStorage.removeItem(key); } catch { /* ignore */ }
}

export function getAuthStatus(): AuthStatus {
  return (safeGet(KEY) as AuthStatus) ?? null;
}

export function setAuthStatus(status: AuthStatus) {
  if (status === null) safeRemove(KEY);
  else safeSet(KEY, status);
}

export function isGuest() {
  return getAuthStatus() === 'guest';
}

export function isAuthenticated() {
  return getAuthStatus() === 'authenticated';
}