/**
 * Display label for an inbound: the remark when one is set, otherwise the
 * inbound tag. Falls back to an empty string when neither is present.
 */
export function formatInboundLabel(tag?: string, remark?: string): string {
  const remarkText = (remark || '').trim();
  if (remarkText) return remarkText;
  return (tag || '').trim();
}

export function formatTunnelConfigMeta(
  inbound: { id?: number; tag?: string; remark?: string },
  email?: string,
  totalCount = 1,
  endpoint = '',
): {
  label?: string;
  fileName: string;
  qrRemark: string;
} {
  const inboundName =
    formatInboundLabel(inbound.tag, inbound.remark) ||
    (inbound.id != null ? `inbound-${inbound.id}` : '');
  const name = [inboundName, endpoint].filter(Boolean).join(' - ');
  const label = totalCount > 1 ? name : undefined;
  const suffix = [
    inbound.remark || inbound.tag || (inbound.id != null ? `${inbound.id}` : ''),
    endpoint,
  ]
    .filter(Boolean)
    .join('-');
  const safeSuffix = suffix ? `-${suffix.replace(/[^\w.-]+/g, '_')}` : '';
  const emailPrefix = email || 'client';
  const fileName = `${emailPrefix}${totalCount > 1 ? safeSuffix : ''}.conf`;
  const qrRemark = totalCount > 1 && name ? [name, email].filter(Boolean).join(' - ') : email || '';

  return { label, fileName, qrRemark };
}