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

/**
 * Fields compared for dirty state and included in Save patch.
 * Only keys that map to board PATCH (or required companions like dispatcherName / vendor labels).
 * POC, locationId, and tech phone are not board-editable — exclude so Save cannot no-op.
 */
export const SLIDE_OVER_EDIT_KEYS = [
  "woNumber",
  "site",
  "type",
  "dispatcherId",
  "dispatcherName",
  "scheduledOn",
  "targetWeek",
  "scheduleWeekOnly",
  "dueDate",
  "completedDate",
  "apptTime",
  "pm",
  "serviceNotes",
  "extraServices",
  "vendorId",
  // company/tech are display companions; board persists vendor via vendorId only
  "status",
] as const satisfies ReadonlyArray<keyof WorkOrderTableRow>;

type EditKey = (typeof SLIDE_OVER_EDIT_KEYS)[number];

function sameExtraServices(a: string[] | undefined, b: string[] | undefined): boolean {
  const left = a ?? [];
  const right = b ?? [];
  if (left.length !== right.length) return false;
  return left.every((value, index) => value === right[index]);
}

export function isSlideOverDraftDirty(
  draft: WorkOrderTableRow,
  baseline: WorkOrderTableRow,
): boolean {
  for (const key of SLIDE_OVER_EDIT_KEYS) {
    if (key === "extraServices") {
      if (!sameExtraServices(draft.extraServices, baseline.extraServices)) return true;
      continue;
    }
    if (draft[key] !== baseline[key]) return true;
  }
  return false;
}

export function buildSlideOverPatch(
  draft: WorkOrderTableRow,
  baseline: WorkOrderTableRow,
): WorkOrderTablePatch {
  const patch: WorkOrderTablePatch = {};

  for (const key of SLIDE_OVER_EDIT_KEYS) {
    if (key === "extraServices") {
      if (!sameExtraServices(draft.extraServices, baseline.extraServices)) {
        patch.extraServices = draft.extraServices;
      }
      continue;
    }
    if (draft[key] !== baseline[key]) {
      (patch as Record<EditKey, WorkOrderTableRow[EditKey]>)[key] = draft[key];
    }
  }

  return patch;
}