const SENDGRID_API_KEY = process.env.SENDGRID_API_KEY
const SENDGRID_URL = 'https://api.sendgrid.com/v3/mail/send'
// TODO: move to env
const BOOKING_ADMIN_EMAIL = 'tomru@mail.id0.link'
const FROM_EMAIL = 'pfadibussle@mail.id0.link'

if (!SENDGRID_API_KEY) {
  throw new Error('NO SENDGRID_API_KEY set!')
}

if (!SENDGRID_API_KEY) {
  throw new Error('NO SENDGRID_API_KEY set!')
}

async function sendMail(data: object) {
  const fetchOptions = {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Authorization: `Bearer ${SENDGRID_API_KEY}`,
    },
    body: JSON.stringify(data),
  }
  const response = await fetch(SENDGRID_URL, fetchOptions)

  if (!response.ok) {
    throw new Error(`Unable to send mail`)
  }
}

function getReceivedBookingText(booking: { uuid: string }) {
  return `Hallo lieber Admin,

  es ging folgende Buchung ein: https://${process.env.VERCEL_URL}/booking/${booking.uuid}

  MfG`
}

export async function sendReceivedBookingMail(booking: { uuid: string }) {
  const data = {
    personalizations: [
      {
        to: [{ email: BOOKING_ADMIN_EMAIL }],
      },
    ],
    from: { email: FROM_EMAIL },
    subject: `Pfadi Bussle - Buchung ${booking.uuid} eingegangen!`,
    content: [{ type: 'text/plain', value: getReceivedBookingText(booking) }],
  }

  try {
    await sendMail(data)
  } catch (error) {
    console.error(`Failed in sendReceivedBookingMail for ${booking.uuid}`)
  }
}