import gql from 'graphql-tag';

import { ApolloClient } from 'apollo-client';
import { createHttpLink } from 'apollo-link-http';
import { setContext } from 'apollo-link-context';
import { InMemoryCache } from 'apollo-cache-inmemory';

import Octokit from '@octokit/rest';
import resetURL from './resetURL';
import { setCookie, getCookie } from './cookie';

const getGithubClient = () => {
  // token
  const c = /\?code=([^?]+)/;

  const code = (c.exec(window.location.search) || [])[1];

  resetURL();

  return new Promise((resolve, reject) =>
    code ? resolve(code) : reject('not logged in')
  )
    .then(code => {
      const token = getCookie('token');
      if (token) return token;

      console.log('first login');

      const proxy = new ApolloClient({
        link: createHttpLink({
          uri: 'https://like-water.netlify.com/.netlify/functions/graphql'
        }),
        cache: new InMemoryCache()
      });

      return proxy
        .query({
          query: gql`
                query {
                  token(code: "${code}") {
                    access_token
                  }
                }
              `
        })
        .then(({ data: { token: { access_token } } }) => {
          setCookie('token', access_token);

          return access_token;
        });
    })
    .then(token => {
      // basic auth

      return new Octokit({
        auth: token
      });
    });
};

export default getGithubClient;