import { mockDb } from '@/lib/mockDb'

export async function GET() {
  const baseUrl = 'https://marmarislocal.com'

  // Fetch data
  const posts = await mockDb.getBlogPosts(true)
  const listings = await mockDb.getListings({ isLocalApproved: true })

  // Construct XML
  let xml = `<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
  <title>Marmaris Local</title>
  <link>${baseUrl}</link>
  <description>Marmaris'in yerel rehberi, gurme mekanları ve gezilecek gizli yerleri.</description>
  <language>tr</language>
  <lastBuildDate>${new Date().toUTCString()}</lastBuildDate>
  <atom:link href="${baseUrl}/feed.xml" rel="self" type="application/rss+xml" />
`

  // Add blog posts
  for (const post of posts.slice(0, 10)) {
    const pubDate = post.publishedAt ? new Date(post.publishedAt).toUTCString() : new Date(post.createdAt).toUTCString()
    xml += `  <item>
    <title><![CDATA[${post.titleTr}]]></title>
    <link>${baseUrl}/tr/blog/${post.slug}</link>
    <guid>${baseUrl}/tr/blog/${post.slug}</guid>
    <pubDate>${pubDate}</pubDate>
    <description><![CDATA[${post.contentTr.substring(0, 200)}...]]></description>
  </item>
`
  }

  // Add newly added approved listings
  for (const listing of listings.slice(0, 10)) {
    const pubDate = new Date(listing.createdAt).toUTCString()
    const catSlug = listing.category?.slug || 'businesses'
    xml += `  <item>
    <title><![CDATA[Yeni Onaylandı: ${listing.nameTr} (${listing.neighborhood?.nameTr})]]></title>
    <link>${baseUrl}/tr/${catSlug}/${listing.slug}</link>
    <guid>${baseUrl}/tr/${catSlug}/${listing.slug}</guid>
    <pubDate>${pubDate}</pubDate>
    <description><![CDATA[${listing.descriptionTr}]]></description>
  </item>
`
  }

  xml += `</channel>
</rss>`

  return new Response(xml, {
    headers: {
      'Content-Type': 'application/xml; charset=utf-8',
      'Cache-Control': 'public, s-maxage=86400, stale-while-revalidate=43200'
    }
  })
}