export const UNBOUND_PATH_CLIENT = "—"

export interface ServicePathLabelInput {
  clientId: string
  clientName: string
  viaId: string
  viaName: string
  enId: string
  enName: string
  serviceId: string
}

export interface ServicePathLabelNames {
  viaName?: string
  viaSite?: string
  enName?: string
  serviceLabel?: string
}

export function isUnboundServicePath(p: Pick<ServicePathLabelInput, "clientId" | "clientName">): boolean {
  return p.clientId === UNBOUND_PATH_CLIENT || p.clientName === UNBOUND_PATH_CLIENT
}

export function formatServicePathLabel(
  p: ServicePathLabelInput,
  viaMode: "via" | "service",
  names: ServicePathLabelNames = {},
): string {
  const viaName = names.viaName || p.viaName
  const enName = names.enName || p.enName
  if (isUnboundServicePath(p)) {
    if (p.viaId !== p.enId) return `${viaName} → ${enName}`
    return `${enName} · без привязки`
  }
  const viaLabel = names.viaSite || p.viaName
  const mid = viaMode === "via" ? viaLabel : (names.serviceLabel || p.serviceId)
  return `${p.clientName} · ${mid}`
}

export function formatServicePathTitle(label: string, serviceLabel: string): string {
  const svc = serviceLabel.trim()
  if (!svc) return label
  if (label.includes(svc)) return label
  return `${label} · ${svc}`
}