import isBrowser from "is-in-browser";

/**
 * Checks if the environment is online.
 * In browser: uses navigator.onLine only (no fetch, avoids CORS issues).
 * In Node.js: always returns true.
 * Optionally, pass a testUrl for advanced use (may cause CORS errors).
 */
export const isOnline = (): boolean => {
  if (!isBrowser) {
    // Node.js or non-browser environment
    return true;
  }
  // Browser environment
  if (
    typeof window !== "undefined" &&
    typeof window.navigator !== "undefined" &&
    !window.navigator.onLine
  ) {
    return false;
  }
  // Fallback
  return true;
};