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, options }) =>
            request.cookies.set(name, value),
          );
          supabaseResponse = NextResponse.next({
            request,
          });
          cookiesToSet.forEach(({ name, value, options }) =>
            supabaseResponse.cookies.set(name, value, options),
          );
        },
      },
    },
  );

  // Refreshing the auth token
  const {
    data: { user },
  } = await supabase.auth.getUser();

  // Protected routes
  const protectedRoutes = [
    "/dashboard",
    "/pos",
    "/inventory",
    "/sales",
    "/analytics",
    "/settings",
  ];
  const authRoutes = ["/login", "/register", "/auth/callback"];

  const isProtectedRoute = protectedRoutes.some((route) =>
    request.nextUrl.pathname.startsWith(route),
  );
  const isAuthRoute = authRoutes.some((route) =>
    request.nextUrl.pathname.startsWith(route),
  );

  // If trying to access protected route without auth, redirect to login
  if (isProtectedRoute && !user) {
    const redirectUrl = request.nextUrl.clone();
    redirectUrl.pathname = "/login";
    redirectUrl.searchParams.set("redirectedFrom", request.nextUrl.pathname);
    return NextResponse.redirect(redirectUrl);
  }

  // If authenticated and trying to access auth routes, redirect to dashboard
  if (isAuthRoute && user) {
    const redirectUrl = request.nextUrl.clone();
    redirectUrl.pathname = "/dashboard";
    return NextResponse.redirect(redirectUrl);
  }

  return supabaseResponse;
}

export const config = {
  matcher: [
    /*
     * Match all request paths except:
     * - _next/static (static files)
     * - _next/image (image optimization files)
     * - favicon.ico (favicon file)
     * - public folder
     * - api routes
     */
    "/((?!_next/static|_next/image|favicon.ico|.*\\.(?:svg|png|jpg|jpeg|gif|webp)$).*)",
  ],
};