import { isHTTPError, isNetworkError, isTimeoutError } from "ky";
import { mapHttpStatusToMessage } from "@/api/api-error";
import { DISPATCH_REQUIRED_MESSAGE } from "@/domain/work-orders/errors/board-patch-errors";

export const BOARD_CREATE_FAILED_MESSAGE = "Unable to create the work order. Please try again.";

const DUPLICATE_WO_NUMBER_MESSAGE =
  "This work order number is already assigned to another work order.";

/** Statuses whose mapped copy is fixed product text, never the response body. */
const FIXED_COPY_STATUSES = new Set([401, 403, 404, 500]);

function readErrorCode(data: unknown): string | undefined {
  if (typeof data !== "object" || data === null) {
    return undefined;
  }
  const record = data as Record<string, unknown>;
  const code = record.code ?? record.Code;
  return typeof code === "string" ? code : undefined;
}

/**
 * why: board create returns backend validation text ("siteCode is required.",
 * "vendorId is required when setting appointment fields.") that must never reach the
 * screen. Unknown failures fall back to generic copy, not to `error.message`.
 */
export function boardCreateErrorMessage(error: unknown): string {
  if (isHTTPError(error)) {
    const code = readErrorCode(error.data);
    if (code === "DispatchRequired") {
      return DISPATCH_REQUIRED_MESSAGE;
    }
    if (code === "DuplicateWoNumber") {
      return DUPLICATE_WO_NUMBER_MESSAGE;
    }
    const status = error.response.status;
    return FIXED_COPY_STATUSES.has(status)
      ? mapHttpStatusToMessage(status)
      : BOARD_CREATE_FAILED_MESSAGE;
  }
  if (isNetworkError(error) || isTimeoutError(error)) {
    return error.message;
  }
  return BOARD_CREATE_FAILED_MESSAGE;
}