import { isBrowserEnv } from "./isBrowserEnv";

/**
 * Returns a cookie with the specified name,
 * or undefined if nothing is found
 *
 * @param name - The name of the cookie whose value you want to get
 * @param cookiesString - You can specify a custom cookies string (for example, if you are not in a browser)
 */

export const getCookie = (name: string, cookiesString?: string): string | undefined => {
  let cookies = cookiesString;

  if (isBrowserEnv() && !cookies) {
    cookies = document.cookie;
  }
  if (!cookies) return undefined;

  const matches = cookies.match(
    new RegExp(`(?:^|; )${name.replace(/([.$?*|{}()[\]\\/+^])/g, `\\$1`)}=([^;]*)`),
  );

  return matches ? decodeURIComponent(matches[1]) : undefined;
};