import type { ServiceRequest } from "fhir/r4";

const ORDER_REJECTION_URL = "https://akashichealthrecords.com/fhir/StructureDefinition/order-rejection";

/** A laboratory's refusal of this order that nobody has resolved yet, with the reason it gave. */
export const openOrderRefusal = (order: ServiceRequest | undefined): { reason?: string } | undefined => {
  const found = order?.extension?.find((extension) => extension.url === ORDER_REJECTION_URL);
  if (!found || found.extension?.some((part) => part.url === "resolved")) return undefined;
  const reason = found.extension?.find((part) => part.url === "reason")?.valueCodeableConcept;
  return { reason: reason?.text ?? reason?.coding?.[0]?.display };
};

const SPECIMEN_REJECTION_URL = "https://akashichealthrecords.com/fhir/StructureDefinition/specimen-rejection";

/** The laboratory refusing the TUBE rather than the order: why, and whether a new sample was asked for. */
export const specimenRefusal = (order: ServiceRequest | undefined): { reason?: string; redraw: boolean } | undefined => {
  const found = order?.extension?.find((extension) => extension.url === SPECIMEN_REJECTION_URL);
  if (!found) return undefined;
  const part = (url: string) => found.extension?.find((each) => each.url === url);
  const reason = part("reason")?.valueCodeableConcept;
  return { reason: reason?.text ?? reason?.coding?.[0]?.display, redraw: part("disposition")?.valueCode === "redraw" };
};