middleware.ts

import NextAuth from "next-auth";

import authConfig from "./auth.config";

const { auth } = NextAuth(authConfig);

import {
  DEFAULT_LOGIN_REDIRECT,
  apiAuthPrefix,
  authRoutes,
  publicRoutes,
} from "@/routes";

export default auth((req) => {
  const { nextUrl } = req;
  const isLogedIn = !!req.auth;
  
  const isApiAuthRoute = nextUrl.pathname.startsWith(apiAuthPrefix);
  const isPublicRoute = publicRoutes.includes(nextUrl.pathname);
  const isAuthRoute = authRoutes.includes(nextUrl.pathname);

  if (isApiAuthRoute) {
    return null;
  }

  if (isAuthRoute) {
    if (isLogedIn) {
      return Response.redirect(new URL(DEFAULT_LOGIN_REDIRECT, nextUrl));
    }
    return null;
  }

  if (!isLogedIn && !isPublicRoute) {
    let callbackUrl = nextUrl.pathname;
    if (nextUrl.search) {
      callbackUrl += nextUrl.search
    }

    const encodedCallbackUrl = encodeURIComponent(callbackUrl);

    return Response.redirect(new URL(
      `/auth/login?callbackUrl=${encodedCallbackUrl}`, 
      nextUrl
    ));
  }

  return null;
})

export const config = {
  matcher: ['/((?!.+\\.[\\w]+$|_next).*)', '/', '/(api|trpc)(.*)'],
};