const SESSION_STORAGE_KEY = 'shahi-geoapify-disabled';

export type GeoapifyUnavailableReason =
  | 'missing_key'
  | 'quota_exceeded'
  | 'unauthorized'
  | 'forbidden'
  | 'rate_limited'
  | 'payment_required'
  | 'network'
  | 'server_error';

export function isGeoapifyApiKeyConfigured(): boolean {
  const key = process.env.NEXT_PUBLIC_GEOAPIFY_API_KEY;
  return typeof key === 'string' && key.trim().length > 0;
}

export function isGeoapifyAutocompleteDisabled(): boolean {
  if (typeof window === 'undefined') return false;
  try {
    return sessionStorage.getItem(SESSION_STORAGE_KEY) === '1';
  } catch {
    return false;
  }
}

export function disableGeoapifyAutocomplete(): void {
  if (typeof window === 'undefined') return;
  try {
    sessionStorage.setItem(SESSION_STORAGE_KEY, '1');
  } catch {
    // sessionStorage may be unavailable in private mode
  }
}

export function mapGeoapifyHttpStatus(status: number): GeoapifyUnavailableReason {
  switch (status) {
    case 401:
      return 'unauthorized';
    case 402:
      return 'payment_required';
    case 403:
      return 'forbidden';
    case 429:
      return 'rate_limited';
    default:
      if (status >= 500) return 'server_error';
      return 'quota_exceeded';
  }
}