interface NomadListLocation {
  city: string
  country: string
  country_code: string
  latitude: number
  longitude: number
  epoch_start: number
  epoch_end: number
  date_start: string
  date_end: string
  place_photo: string
}

interface NomadListLocationResponse {
  location: {
    now: NomadListLocation
    previous: NomadListLocation
    next: NomadListLocation
  }
}

export const config = {
  runtime: 'experimental-edge'
}

function removeUnwantedKeys(location: NomadListLocation) {
  const { place_photo, latitude, longitude, epoch_start, epoch_end, ...rest } =
    location
  return rest
}

export default async () => {
  try {
    if (!process.env.NOMADLIST_PROFILE) {
      throw new Error('Missing NOMADLIST_PROFILE env variable')
    }
    if (!process.env.NOMADLIST_KEY) {
      throw new Error('Missing NOMADLIST_KEY env variable')
    }

    const response = await fetch(
      `https://nomadlist.com/@${process.env.NOMADLIST_PROFILE}.json?key=${process.env.NOMADLIST_KEY}`
    )
    if (!response || !response.ok || response.status !== 200) {
      throw new Error("Couldn't fetch data from NomadList")
    }
    const json = (await response.json()) as NomadListLocationResponse

    // return only parts of the data
    const final = {
      now: removeUnwantedKeys(json.location.now),
      next: removeUnwantedKeys(json.location.next)
    }
    return new Response(JSON.stringify(final), {
      status: 200,
      headers: {
        'Content-Type': 'application/json',
        'Cache-Control': 's-maxage=60, stale-while-revalidate'
      }
    })
  } catch (error) {
    return new Response(JSON.stringify(error), { status: 500 })
  }
}