import { NextRequest, NextResponse } from "next/server";
import { getToken } from "next-auth/jwt";

const AUTH_ROUTES = ["/login", "/register"];

export async function proxy(request: NextRequest) {
  const pathname = request.nextUrl.pathname;

  const atMatch = pathname.match(/^\/@([a-zA-Z0-9_]{3,32})$/);
  if (atMatch) {
    const url = request.nextUrl.clone();
    url.pathname = `/u/${atMatch[1].toLowerCase()}`;
    return NextResponse.rewrite(url);
  }

  const token = await getToken({ req: request });

  if (pathname.startsWith("/dashboard") && !token) {
    const url = request.nextUrl.clone();
    url.pathname = "/login";
    url.searchParams.set("next", pathname);
    return NextResponse.redirect(url);
  }

  if (AUTH_ROUTES.includes(pathname) && token) {
    const url = request.nextUrl.clone();
    url.pathname = "/dashboard";
    return NextResponse.redirect(url);
  }

  return NextResponse.next();
}

export const config = {
  matcher: ["/((?!api|_next/static|_next/image|favicon.ico|robots.txt|sitemap.xml).*)"]
};