// client/offline.js

const CACHE_KEY = 'license_data';

export const cacheLicenseData = (licenseData) => {
  localStorage.setItem(CACHE_KEY, JSON.stringify({
    data: licenseData,
    cachedAt: Date.now(),
  }));
};

export const getCachedLicenseData = () => {
  const item = localStorage.getItem(CACHE_KEY);
  return item ? JSON.parse(item) : null;
};

export const isLicenseCacheValid = () => {
  const cache = getCachedLicenseData();
  if (!cache) return false;

  const cachedAt = cache.cachedAt;
  const elapsedDays = (Date.now() - cachedAt) / (1000 * 60 * 60 * 24);
  return elapsedDays <= CONFIG.OFFLINE_GRACE_PERIOD_DAYS;
};