const localHostnames = new Set(['localhost', '127.0.0.1', '::1']);

function trimTrailingSlash(value) {
  return String(value || '').replace(/\/$/, '');
}

function currentHostname() {
  if (typeof window === 'undefined' || !window.location || !window.location.hostname) {
    return '';
  }

  return window.location.hostname.toLowerCase();
}

export function getLegacyBaseUrl() {
  const configuredBaseUrl = trimTrailingSlash(import.meta.env.VITE_LEGACY_BASE_URL || '');
  if (configuredBaseUrl) {
    return configuredBaseUrl;
  }

  return localHostnames.has(currentHostname())
    ? 'http://localhost:8080'
    : 'https://www.regalamiunsorriso.it';
}

export function legacyUrl(path = '/') {
  const normalizedPath = path.startsWith('/') ? path : `/${path}`;
  return `${getLegacyBaseUrl()}${normalizedPath}`;
}