middleware.ts

import { createServerClient } from '@supabase/ssr';
import { NextResponse, type NextRequest } from 'next/server';

export async function middleware(request: NextRequest) {
  let supabaseResponse = NextResponse.next({ request });

  const supabase = createServerClient(
    process.env.NEXT_PUBLIC_SUPABASE_URL!,
    process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY!,
    {
      cookies: {
        getAll() {
          return request.cookies.getAll();
        },
        setAll(cookiesToSet) {
          cookiesToSet.forEach(({ name, value }) =>
            request.cookies.set(name, value)
          );
          supabaseResponse = NextResponse.next({ request });
          cookiesToSet.forEach(({ name, value, options }) =>
            supabaseResponse.cookies.set(name, value, options)
          );
        },
      },
    }
  );

  const { data: { user } } = await supabase.auth.getUser();

  const { pathname } = request.nextUrl;
  const publicRoutes = ['/', '/auth', '/auth/callback'];
  const isPublic = publicRoutes.some(route => pathname === route || pathname.startsWith('/auth/'));

  if (!user && !isPublic) {
    const url = request.nextUrl.clone();
    url.pathname = '/auth';
    return NextResponse.redirect(url);
  }

  return supabaseResponse;
}

export const config = {
  matcher: [
    '/((?!_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)',
  ],
};