import { CookieJar } from 'jsdom';
import nodeFetch, { RequestInit, Response } from 'node-fetch';
import { Errors, RenaiError } from '../../types/error';
import { load, save, StoreKeys } from './store';

export let cookieJar: CookieJar = new CookieJar();

let error: Error;

function init(): void {
  load(StoreKeys.COOKIES)
    .then((cookies: any) => {
      if (cookies !== undefined) {
        cookieJar = CookieJar.deserializeSync(cookies);
      }
    })
    .catch((reason: any) => {
      error = new RenaiError(Errors.EINITFAIL, reason);
    });
}

export function fetch(url: string, requestInit: RequestInit = {}): Promise<Response> {
  if (error !== undefined) {
    return Promise.reject(error);
  }
  const cookiedInit = {
    ...requestInit,
    ...{
      headers: {
        ...requestInit.headers,
        ...{
          Cookie: cookieJar.getCookieStringSync(url),
        },
      },
    },
  };
  return nodeFetch(url, cookiedInit).then((res: Response) => {
    setCookies(res.headers.raw()['set-cookie'], url).catch((reason: any) => {
      error = new Error(reason);
    });
    return res;
  });
}

function setCookies(header: string[], url: string): Promise<void> {
  if (header) {
    header.forEach((cookie: string) => {
      cookieJar.setCookieSync(cookie, url);
    });
    return save(StoreKeys.COOKIES, cookieJar.serializeSync());
  }
  return Promise.resolve();
}

init();