import { createClient } from '@supabase/supabase-js'
import { parseCountryField } from '../../config/utilities/index.js'

const SUPABASE_URL = process.env.SUPABASE_URL
const SUPABASE_KEY = process.env.SUPABASE_KEY
const supabase = createClient(SUPABASE_URL, SUPABASE_KEY)
const PAGE_SIZE = 1000

const fetchAllArtists = async () => {
  let artists = []
  let rangeStart = 0

  while (true) {
    const { data, error } = await supabase
      .from('optimized_artists')
      .select('*')
      .range(rangeStart, rangeStart + PAGE_SIZE - 1)

    if (error) {
      console.error('Error fetching artists:', error)
      break
    }

    artists = artists.concat(data)
    if (data.length < PAGE_SIZE) break
    rangeStart += PAGE_SIZE
  }

  return artists
}

const processArtists = (artists) => {
  return artists.map(artist => ({
    ...artist,
    country: parseCountryField(artist['country']),
  }))
}

export default async function () {
  try {
    const artists = await fetchAllArtists()
    return processArtists(artists)
  } catch (error) {
    console.error('Error fetching and processing artists data:', error)
    return []
  }
}