// Keeps the visitor's address available to route-cached SSR renders.
//
// An app rule such as `'/**': { swr }` wraps the page renderer (and any
// matching server route) in Nitro's cached handler, which renders from a copy
// of the request that carries no headers (only `varies` headers survive, so a
// cached page never depends on one visitor's request). Reading
// x-forwarded-for there would forward only the Nuxt peer, and every cache
// miss would share the Journal API's rate-limit bucket. The event context is
// shared with that copy, so the incoming x-forwarded-for plus the peer
// address is recorded on the request hook, before the cached handler runs;
// useJournalApi, /rss.xml and the sitemap source forward it.

export default defineNitroPlugin((nitroApp) => {
  nitroApp.hooks.hook('request', (event) => {
    const forwarded = [getRequestHeader(event, 'x-forwarded-for'), event.node.req.socket?.remoteAddress]
      .filter((v): v is string => typeof v === 'string' && v !== '')
      .join(', ')
    event.context.journalForwardedFor = forwarded
  })
})