import productSearchApi from '@/lib/product/api/productSearchApi'
import { create } from 'xmlbuilder'
import _ from 'lodash-contrib'

export async function getServerSideProps({ res }) {
  const baseUrl = process.env.SELF_HOST + '/sitemap/products'
  const limit = 2500
  const query = { limit }
  const products = await productSearchApi({ query: _.toQuery(query) })
  const pageCount = Math.ceil(products.response.numFound / limit)
  const pages = Array.from({ length: pageCount }, (_, i) => i + 1)
  const sitemapIndex = create('sitemapindex', { encoding: 'UTF-8' }).att(
    'xmlns',
    'http://www.sitemaps.org/schemas/sitemap/0.9'
  )

  const date = new Date()
  pages.forEach((page) => {
    const sitemap = sitemapIndex.ele('sitemap')
    sitemap.ele('loc', `${baseUrl}/${page}.xml`)
    sitemap.ele('lastmod', date.toISOString().slice(0, 10))
  })

  res.setHeader('Content-Type', 'text/xml')
  res.write(sitemapIndex.end())
  res.end()

  return { props: {} }
}

export default function SitemapProducts() {
  return null
}