const isBrowser = typeof window !== 'undefined';

export const safeLocalStorage: Storage | undefined = isBrowser ? window.localStorage : undefined;

export function loadFromStorage<T>(key: string, fallback: T): T {
  if (!safeLocalStorage) return fallback;
  try {
    const raw = safeLocalStorage.getItem(key);
    if (!raw) return fallback;
    return JSON.parse(raw) as T;
  } catch (error) {
    console.warn(`Failed to load ${key} from localStorage`, error);
    return fallback;
  }
}

export function saveToStorage<T>(key: string, value: T): void {
  if (!safeLocalStorage) return;
  try {
    safeLocalStorage.setItem(key, JSON.stringify(value));
  } catch (error) {
    console.warn(`Failed to persist ${key} to localStorage`, error);
  }
}