import { JWT } from 'google-auth-library';
import { google } from 'googleapis';
import { GoogleCalendarEvent } from './types/index';

require('dotenv').config();
const env = process.env;


export default class GoogleCalendar {
  client_secret: string;
  client_id: string;
  calender_id: string;
  calendar: any;
  clientEmail: string;
  googlePrivateKey: string;
  token: any;

  constructor() {
    this.client_secret = env.GOOGLE_CLIENT_SECRET;
    this.client_id = env.GOOGLE_CLIENT_ID;
    this.calender_id = env.GOOGLE_CALENDAR_ID;
    this.clientEmail = env.GOOGLE_CLIENT_EMAIL
    this.googlePrivateKey = env.GOOGLE_PRIVATE_KEY.replace(/\\n/g, '\n');
    // this.redirect_uris = env.GOOGLE_REDIRECT_URIS;
  }

  async init() {
    const jwtClient = await this.authorize();
    this.calendar = google.calendar({ version: 'v3', auth: jwtClient });
  }

  async authorize() {
    const client = new JWT({
      email: this.clientEmail,
      key: this.googlePrivateKey,
      scopes: 'https://www.googleapis.com/auth/calendar.events'
    });
    const { access_token } = await client.authorize();
    this.token = access_token;
    if(!this.token) {
      throw new Error('Failed to connect to google calendar');
    }
    return client;
  }

  updateNewEvent(upcomingEvents: GoogleCalendarEvent[]) {
    this.calendar.event.insert({
      auth: this.token,
      calendarId: this.calender_id,
      resource: upcomingEvents[0],
    }, function (err: any, event: any) {
      if (err) {
        console.log('There was an error contacting the Calendar service:  ' + err);
        return;
      }
      console.log('Event created: %s', event.htmlLink);
    });
  }
}