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

import { findLang } from "@/utils/languages"
import { removeTrailingSlash } from "@/utils/url"

import type { NextRequest } from "next/server"

export function getDefaultRequestHeaders(request: NextRequest) {
  const lang = findLang(request.nextUrl.pathname)!

  let nextUrl
  if (env.PUBLIC_URL) {
    const publicUrl = new URL(env.PUBLIC_URL)
    const nextUrlPublic = request.nextUrl.clone()
    nextUrlPublic.host = publicUrl.host
    nextUrlPublic.hostname = publicUrl.hostname
    nextUrl = nextUrlPublic
  } else {
    nextUrl = request.nextUrl
  }

  const headers = new Headers(request.headers)
  headers.set("x-lang", lang)
  headers.set(
    "x-pathname",
    removeTrailingSlash(
      request.nextUrl.pathname.replace(`/${lang}`, "").replace(`/webview`, "")
    )
  )
  headers.set("x-url", removeTrailingSlash(nextUrl.href))

  return headers
}