middleware.ts

import authConfig from "./auth.config"
import NextAuth from "next-auth"

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

const { auth } = NextAuth(authConfig);

export default auth((req) => {
  const { nextUrl } = req;
  const isLoggedIn = !!req.auth;

  const isApiAuthRoute = nextUrl.pathname.startsWith(apiAuthPrefix);
  const isPublicRoute = publicRoutes.includes(nextUrl.pathname);
  const isAuthRoute = authRoutes.includes(nextUrl.pathname);

  if (isApiAuthRoute) {
    return;
  }

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

  if (!isLoggedIn && !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;
})
 
// Optionally, don't invoke Middleware on some paths
export const config = {
  matcher: ['/((?!.*\\..*|_next).*)', '/', '/(api|trpc)(.*)'],
}