import { getSupabaseAdmin } from '@/lib/supabase/admin';
import { RESERVED_SUBDOMAINS } from '@/lib/validation';

/**
 * Returns true if the subdomain is reserved in EITHER the hardcoded fallback
 * set or the reserved_subdomains DB table.
 */
export async function isSubdomainReserved(subdomain: string): Promise<boolean> {
  if (RESERVED_SUBDOMAINS.has(subdomain)) return true;
  const admin = getSupabaseAdmin();
  const { data } = await admin
    .from('reserved_subdomains')
    .select('name')
    .eq('name', subdomain)
    .maybeSingle<{ name: string }>();
  return !!data;
}