import { GetServerSidePropsContext } from 'next';

import { getCookie } from './get-cookie';

export const getActiveCookie = (
  ctx: GetServerSidePropsContext,
  cookieName: string
): string | undefined => {
  const setCookies = ctx.res.getHeader('set-cookie') as string[];
  const fallback = ctx.req.cookies[cookieName];
  const entry = setCookies?.find((item) => item.startsWith(cookieName));
  if (entry === 'undefined') {
    return;
  }

  return getCookie(cookieName, entry) || fallback;
};