/** Публичные домены IdP (split-domain: API и SSO на разных хостах). */
export const PROJECT_API_HOST = 'api.idpmvk.lpr';
export const PROJECT_SSO_HOST = 'sso.idpmvk.lpr';

export const DEFAULT_PUBLIC_API_URL = `https://${PROJECT_API_HOST}`;
export const DEFAULT_PUBLIC_FRONTEND_URL = `https://${PROJECT_SSO_HOST}`;

export function inferApiBaseFromProjectDomain(domain: string): string | null {
  const host = domain
    .trim()
    .replace(/^https?:\/\//i, '')
    .split('/')[0]
    .toLowerCase();

  if (!host) {
    return null;
  }

  if (host.startsWith('sso.')) {
    return `https://${host.replace(/^sso\./, 'api.')}`;
  }

  if (host.startsWith('api.')) {
    return `https://${host}`;
  }

  return null;
}