import type { WorkOrderTablePatch } from "@/domain/work-orders/types/work-order-table-row";

export function serviceIdentityPatch(
  currentServiceId: string | number | null | undefined,
  currentName: string,
  nextName: string,
  nextServiceId: string | number | null | undefined,
): Pick<WorkOrderTablePatch, "pm" | "serviceId"> {
  const sameIdentity =
    currentServiceId != null &&
    nextServiceId != null &&
    String(currentServiceId) === String(nextServiceId);
  if (sameIdentity) return {};

  if (nextServiceId != null) return { pm: nextName, serviceId: nextServiceId };
  if (currentServiceId != null) return { pm: nextName, serviceId: null };

  return nextName === currentName ? {} : { pm: nextName };
}