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

// Session-Refresh + Zugriffsschutz für die internen Bereiche.
export async function proxy(request: NextRequest) {
  let response = 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)
          );
          response = NextResponse.next({ request });
          cookiesToSet.forEach(({ name, value, options }) =>
            response.cookies.set(name, value, options)
          );
        },
      },
    }
  );

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

  if (!user) {
    // Absolute URL aus dem Host-Header des Browsers bauen: request.nextUrl
    // trägt bei "-H 0.0.0.0" die Server-Bindung statt des aufgerufenen
    // Hosts, und relative Location-Header lehnt die Middleware ab.
    const host = request.headers.get("host") ?? request.nextUrl.host;
    const proto =
      request.headers.get("x-forwarded-proto") ??
      request.nextUrl.protocol.replace(":", "");
    return NextResponse.redirect(`${proto}://${host}/login`, 303);
  }

  return response;
}

export const config = {
  matcher: ["/intern/:path*", "/admin/:path*", "/konto/:path*"],
};