let onSessionExpiredCallback = null;

export const setSessionExpiredCallback = (callback) => {
  onSessionExpiredCallback = callback;
};

const authFetch = async (url, options = {}) => {
  const token = localStorage.getItem('token');

  if (!token) {
    onSessionExpiredCallback?.();
    return null;
  }

  const method = options.method?.toUpperCase() || 'GET';
  const shouldIncludeContentType = ['POST', 'PUT', 'PATCH'].includes(method);

  const res = await fetch(url, {
    ...options,
    headers: {
      Authorization: `Bearer ${token}`,
      ...(shouldIncludeContentType && { 'Content-Type': 'application/json' }),
      ...options.headers,
    },
  });

  if ([401, 403].includes(res.status)) {
    onSessionExpiredCallback?.();
    return null;
  }

  return res;
};

export default authFetch;