// The FAQ API client. On the server it calls the internal base
// (runtimeConfig.faq.apiBase) and forwards the visitor's x-forwarded-for,
// plus the address of the peer that reached Nuxt, so the Go rate limiter
// keeps one bucket per visitor, also on route-cached renders. In the browser
// it calls the same-origin public base. The base is always runtime config,
// never request input.

import { createFaqClient, type FaqClient, type FaqFetcher } from '../utils/client.ts'

export function useFaqApi(): FaqClient {
  const config = useRuntimeConfig()

  if (import.meta.server) {
    const base = (config.faq as { apiBase: string }).apiBase
    const event = useRequestEvent()
    const recorded = event?.context.faqForwardedFor as string | undefined
    const incoming = useRequestHeaders(['x-forwarded-for'])['x-forwarded-for']
    const peer = event?.node?.req?.socket?.remoteAddress
    const forwarded = recorded || [incoming, peer].filter((v): v is string => typeof v === 'string' && v !== '').join(', ')
    const headers: Record<string, string> = forwarded ? { 'x-forwarded-for': forwarded } : {}
    const fetcher: FaqFetcher = (path, query) => $fetch(path, { baseURL: base, query, headers })
    return createFaqClient(fetcher)
  }

  const base = (config.public.faq as { apiBase: string }).apiBase
  const fetcher: FaqFetcher = (path, query) => $fetch(path, { baseURL: base, query })
  return createFaqClient(fetcher)
}