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

export const INTERPRETER_NEEDED_URL = "http://hl7.org/fhir/us/core/StructureDefinition/us-core-interpreter-needed";
const INTERPRETER_ANSWERS: Record<string, string> = { Y: "Yes", N: "No", UNK: "Unknown", ASKU: "Asked, not answered" };

// Undefined when the record carries no answer, so the row is left out rather than shown as a No.
export const interpreterNeededLabel = (patient: Pick<Patient, "extension"> | undefined): string | undefined => {
  const answer = patient?.extension?.find((ext) => ext.url === INTERPRETER_NEEDED_URL);
  if (typeof answer?.valueBoolean === "boolean") return answer.valueBoolean ? "Yes" : "No";
  const code = answer?.valueCode ?? answer?.valueCoding?.code;
  return code ? INTERPRETER_ANSWERS[code] ?? code : undefined;
};