import type {
  WorkOrderBoardEditableField,
  WorkOrderBoardPatchPayload,
} from "@/domain/work-orders/types/work-order-board";
import type {
  WorkOrderTablePatch,
  WorkOrderTableRow,
} from "@/domain/work-orders/types/work-order-table-row";
import {
  expandScalarBoardOps,
  mapDocStatusToApi,
  type BoardFieldOp,
} from "@/domain/work-orders/mappers/expand-scalar-board-ops";
import { expandScheduleBoardOps } from "@/domain/work-orders/mappers/expand-schedule-board-ops";

export type { BoardFieldOp };
export { mapDocStatusToApi };

const DISPATCH_FIELDS = new Set<WorkOrderBoardEditableField>(["vendorId", "apptDate", "apptTime"]);

const LOCAL_ONLY_KEYS = new Set<keyof WorkOrderTablePatch>([
  "mediaCount",
  "dayGroup",
  "dayLabel",
  "dispatcherName",
  "company",
  "tech",
  "techPhone",
  "location",
  "locationId",
  "pocName",
  "pocPhone",
  "pocNotes",
  "title",
  "priority",
  "apptStart",
  "apptEnd",
  "rescheduleCount",
  "carriedOver",
  "isPastDue",
  "originalWeek",
  "originalDate",
  /** Optimistic overlay only — backend owns isAddOn after schedule ops (SH-184). */
  "isAddOn",
]);

export function isLocalOnlyTablePatch(patch: WorkOrderTablePatch): boolean {
  const keys = Object.keys(patch) as (keyof WorkOrderTablePatch)[];
  return keys.length > 0 && keys.every((key) => LOCAL_ONLY_KEYS.has(key));
}

/**
 * Expands a UI table patch into ordered board field ops (one PATCH each).
 * Schedule/week-only fields are emitted first in a stable order.
 */
export function expandTablePatchToBoardFieldOps(patch: WorkOrderTablePatch): BoardFieldOp[] {
  if (isLocalOnlyTablePatch(patch)) {
    return [];
  }

  return [...expandScheduleBoardOps(patch), ...expandScalarBoardOps(patch)];
}

export function isDispatchBoardField(field: WorkOrderBoardEditableField): boolean {
  return DISPATCH_FIELDS.has(field);
}

export function buildBoardPatchPayload(
  op: BoardFieldOp,
  row: Pick<WorkOrderTableRow, "rowVersion" | "dispatchRowVersion" | "primaryDispatchId">,
): WorkOrderBoardPatchPayload {
  if (!row.rowVersion) {
    throw new Error("workOrderVersion is required for board patch");
  }

  const payload: WorkOrderBoardPatchPayload = {
    field: op.field,
    value: op.value,
    workOrderVersion: row.rowVersion,
  };

  if (isDispatchBoardField(op.field)) {
    if (row.dispatchRowVersion) {
      payload.dispatchVersion = row.dispatchRowVersion;
    }
    if (row.primaryDispatchId != null) {
      payload.primaryDispatchId = row.primaryDispatchId;
    }
  }

  return payload;
}