import { useCallback, useEffect, useState } from 'react';

import useIsFirstRender from './useIsFirstRender';

const useCookieJar = (): {
  cookieJar: CookieJar;
  getCookie: <T>(key: string) => T | undefined;
  getSession: () => SessionCookie | undefined;
  getSessionUser: () => SessionCookieUser | undefined;
} => {
  const isFirstRender = useIsFirstRender();

  const [cookieJar, setCookieJar] = useState<CookieJar>({});

  const getCookie = useCallback(
    <T>(key: string, prefix = 'suiapi.') =>
      cookieJar[`${prefix}${key}`] as T | undefined,
    [cookieJar],
  );

  const getSession = useCallback(
    () => getCookie<SessionCookie>('session'),
    [getCookie],
  );

  const getSessionUser = useCallback(() => getSession()?.user, [getSession]);

  useEffect(() => {
    if (isFirstRender) {
      const lines = document.cookie.split(/\s*;\s*/);

      setCookieJar(
        lines.reduce<CookieJar>((previous, line) => {
          const [key, value] = line.split('=', 2);

          const decoded = decodeURIComponent(value);

          let result: unknown;

          if (decoded.startsWith('j:')) {
            try {
              result = JSON.parse(decoded.substring(2));
            } catch (error) {
              result = value;
            }
          } else {
            result = value;
          }

          previous[key] = result;

          return previous;
        }, {}),
      );
    }
  }, [isFirstRender]);

  return {
    cookieJar,
    getCookie,
    getSession,
    getSessionUser,
  };
};

export default useCookieJar;