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) {
  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 (!repsonse.ok) {
    throw new Error(
      `Failed to send booking ${data._id} to booking admin with status ${response.status}: ${response.statusText}`
    )
  }
}

export async function sendReceivedBookingMail(booking) {
  const data = {
    personalizations: [
      {
        to: [{ email: BOOKING_ADMIN_EMAIL }],
      },
    ],
    from: { email: FROM_EMAIL },
    subject: 'Pfadi Bussle - Buchung eingegangen!',
    content: [
      { type: 'text/plain', value: `${JSON.stringify(booking, null, 4)}` },
    ],
  }

  await sendMail(data)
}