import { notFound } from "next/navigation"

import { env } from "@/env/server"

import { getLastUpdated, getSitemapIds } from "@/utils/sitemap"

export const dynamic = "force-dynamic"

export async function GET() {
  if (env.HIDE_FOR_NEXT_RELEASE) {
    notFound()
  }

  console.log(`[SITEMAP] Fetching sitemap`)

  const lastUpdated = await getLastUpdated()

  const sitemaps = await getSitemapIds()

  if (!sitemaps || sitemaps.length === 0) {
    return new Response("No sitemaps found", { status: 404 })
  }

  console.log(`[SITEMAP] Sitemaps retrieved: ${sitemaps.length}`)

  const urls = sitemaps.map(
    (id) => `<sitemap>
  <loc>${env.PUBLIC_URL}/sitemap-${id}.xml</loc>
  <lastmod>${lastUpdated}</lastmod>
</sitemap>`
  )

  const sitemapIndexXML = `<?xml version="1.0" encoding="UTF-8"?>\n<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">${urls.join("")}\n</sitemapindex>`

  return new Response(sitemapIndexXML, {
    headers: { "Content-Type": "text/xml" },
  })
}