import { createEvents, EventStatus } from 'ics'
import { BookingDocument } from '../db/booking'
import { BOOKING_STATUS } from '../db/bookingStatus'
import { getBaseURL } from './url'

function convertDay(value: string): [number, number, number] {
  const parts = value.split('-')
  if (parts.length !== 3) {
    throw new Error('faile converting day')
  }
  return [Number(parts[0]), Number(parts[1]), Number(parts[2])]
}

export function generateBookedCalendar(bookings: BookingDocument[]) {
  const events = bookings.map((booking) => ({
    calName: 'Pfadi-Bussle Buchungen',
    start: convertDay(booking.days[0]),
    end: convertDay(booking.days[booking.days.length - 1]),
    title: `Buchung ${booking.booker.name}`,
    description: `Link: ${getBaseURL()}/booking/${booking.uuid}`,
    status:
      booking.status === BOOKING_STATUS.CONFIRMED
        ? ('CONFIRMED' as EventStatus)
        : ('TENTATIVE' as EventStatus),
  }))

  const { error, value } = createEvents(events)

  if (error) {
    throw error
  }

  return value
}