evanpage/frontend/middleware.ts

import { auth } from "@/auth";
import { NextResponse } from "next/server";

export default auth((req) => {
  const { nextUrl } = req;
  const isLoggedIn = !!req.auth;
  const role = (req.auth?.user as any)?.role || "guest";

  const isAuthPage = nextUrl.pathname.startsWith("/login") ||
                     nextUrl.pathname.startsWith("/register") ||
                     nextUrl.pathname.startsWith("/bind-account");

  const isProtected = nextUrl.pathname.startsWith("/dashboard") ||
                      nextUrl.pathname.startsWith("/bookmarks") ||
                      nextUrl.pathname.startsWith("/admin");

  if (isLoggedIn && isAuthPage) {
    return NextResponse.redirect(new URL("/dashboard", nextUrl));
  }

  if (!isLoggedIn && isProtected) {
    return NextResponse.redirect(new URL("/login", nextUrl));
  }

  if (nextUrl.pathname.startsWith("/admin") && role !== "admin") {
    return NextResponse.redirect(new URL("/unauthorized", nextUrl));
  }

  return NextResponse.next();
});

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