import { getServerSideSitemap } from 'next-sitemap'
import { getPayload } from 'payload'
import config from '@payload-config'
import { unstable_cache } from 'next/cache'

import { getPublicPublishedQueryOptions } from '@/utilities/publicationQuery'
import { createSitemapEntry, pageSitemapPath, type SitemapEntry } from '@/utilities/sitemapRoutes'

const getPagesSitemap = unstable_cache(
  async () => {
    const payload = await getPayload({ config })

    const results = await payload.find({
      collection: 'pages',
      ...getPublicPublishedQueryOptions(),
      depth: 0,
      limit: 1000,
      pagination: false,
      select: {
        slug: true,
        spaPath: true,
        updatedAt: true,
      },
    })

    const dateFallback = new Date().toISOString()

    const sitemap = results.docs
      .map((page) => createSitemapEntry(page, pageSitemapPath(page), dateFallback))
      .filter((entry): entry is SitemapEntry => Boolean(entry))

    return sitemap
  },
  ['pages-sitemap'],
  {
    tags: ['pages-sitemap'],
  },
)

export async function GET() {
  const sitemap = await getPagesSitemap()

  return getServerSideSitemap(sitemap)
}