import type { QuestionnaireSaveHandler } from "../../lib";

export const saveDraft: QuestionnaireSaveHandler = async request => {
  const response = await fetch("/api/claims/current/draft", {
    method: "PATCH",
    headers: {
      "Content-Type": "application/json",
      "If-Match": JSON.stringify(request.revision),
    },
    body: JSON.stringify(request),
  });

  // Reject failures so the renderer stays on the page and allows a retry.
  if (!response.ok) throw new Error("Could not save your answers.");

  // The server returns { revision: number }.
  return response.json();
};