import { MMReceiveLaborTicket } from "../services/mm-api-service/types/receive-types.js";
import { convertUtcDateTimeToErpLocal, getERPTimezone } from "./erp-timezone-utils.js";

/**
 * Converts key datetime fields from UTC (MachineMetrics API) to the ERP's local timezone.
 * All inputs/outputs are ISO-8601 strings, and invalid inputs throw errors.
 * @param laborTicket The MMApiReceiveLaborTicket object to convert
 */
export function convertLaborTicketToLocalTimezone(
  laborTicket: MMReceiveLaborTicket
): MMReceiveLaborTicket {
  const timeFields = [
    "clockIn",
    "clockOut",
    "transactionDate",
    "createdAt",
    "updatedAt",
    "workOrderOperationClosedDate",
  ] as const;

  const timezone = getERPTimezone();
  timeFields.forEach((field) => {
    const value = laborTicket[field];
    if (value) {
      laborTicket[field] = convertUtcDateTimeToErpLocal(value, timezone);
    } else {
      laborTicket[field] = null;
    }
  });
  return laborTicket;
}

/**
 * Returns a localized COPY of the labor ticket for handing to connector code,
 * leaving the original ticket's UTC datetime values untouched. Needed on paths
 * that write the ticket back to MM after the ERP call (e.g. the real-time NATS
 * listener): {@link convertLaborTicketToLocalTimezone} mutates in place —
 * including `workOrderOperation.closedDate` via the `workOrderOperationClosedDate`
 * setter — so converting the original would corrupt the UTC values MM requires.
 *
 * The clone is shallow, plus a shallow copy of `workOrderOperation` (the one
 * nested object the localization mutates). That isolates every field the SDK
 * itself rewrites — the datetime values are immutable strings — but other
 * nested references (e.g. `customFields`, `reasons`) remain shared with the
 * original. As on the polling path, connector handlers must treat the ticket
 * as read-only input; mutating shared nested objects would leak into the MM
 * write-back.
 */
export function localizeLaborTicketCopyForConnector(
  laborTicket: MMReceiveLaborTicket
): MMReceiveLaborTicket {
  const copy = new MMReceiveLaborTicket({
    ...laborTicket,
    workOrderOperation: laborTicket.workOrderOperation
      ? { ...laborTicket.workOrderOperation }
      : laborTicket.workOrderOperation,
  });
  return convertLaborTicketToLocalTimezone(copy);
}