import { google } from 'googleapis'
import { Booking } from '../db/booking'

const calendarId = process.env.GOOGLE_CALENDAR_ID
let credentials: object

try {
  credentials = JSON.parse(process.env.GOOGLE_SERVICE_ACCOUNT_KEY_JSON);
} catch (error) {
  console.error('Unable to parse process.env.GOOGLE_SERVICE_ACCOUNT_KEY_JSON - invalid JSON?');
  throw error;
}

const auth = new google.auth.GoogleAuth({
  credentials,
  scopes: [
    'https://www.googleapis.com/auth/calendar',
  ],
})

const calendar = google.calendar({
  version: 'v3',
  auth,
})

export async function getNewEvents() {
  const { data } = await calendar.events.list({
    calendarId,
    timeMin: new Date().toISOString(),
  })

  return data.items
}

function getSummary(booking: Partial<Booking>): string {
  let summary = ''

  if (booking.org) {
    summary += `${booking.org} - `
  }

  summary += booking.name

  return summary
}

export async function createCalendarEvent(booking: Booking): Promise<Booking> {
  const response = await calendar.events.insert({
    calendarId,
    requestBody: {
      summary: getSummary(booking),
      // TODO: description,
      start: { date: booking.startDate },
      end: { date: booking.endDate },
    },
  }, {})

  booking.calendarEventId = response.data.id

  return booking
}

export async function deleteCalendarEvent(booking: Booking) {
  await calendar.events.delete({
    calendarId,
    eventId: booking.calendarEventId,
  })

  booking.calendarEventId = null
}

//export async function patchCalendarEvent(booking: { calendarEventId: string } & Partial<Booking> ) : Promise<Booking> {
//  const response = await calendar.events.patch({
//    calendarId,
//    eventId: booking.calendarEventId,
//  });
//
//  return booking;
//}