import type { NextRequest } from "next/server";

export function clientIp(req: NextRequest | Request): string | null {
  const headers = "headers" in req ? req.headers : new Headers();
  const fwd = headers.get("x-forwarded-for");
  if (fwd) return fwd.split(",")[0]!.trim();
  const real = headers.get("x-real-ip");
  if (real) return real.trim();
  return null;
}

export function userAgent(req: NextRequest | Request): string | null {
  return req.headers.get("user-agent");
}