/* =============================================================================
 * M02_MasterTemplete_Labor_LibMeta.ts
 * 서고 모드(일위대가 · 사전조합) 정보 칸 구분 · 상세구분 고르기(51-12 · 134-5 · `Labor_Detail` 에서 뗌 · 717-3)
 * 고침 = 문서 `구분` · `상세구분` 바로(화면 캐시) · 바꾼 뒤 `changed()`.
 * ========================================================================== */

import { createSelectField } from "@ui/ui_template_elements";
import { fetchStructureDef } from "./StructOptions/M02_SO_Api";
import { precomboClasses } from "./M02_MasterTemplete_UI_Side_Precombo";
import { tc } from "./M02_MasterTemplete_Labor_Text";

/** 서고 구분 · 상세구분(51-12 · 134-5) — 구조물군 › 종류 + 공통(`precomboClasses`)에서 고름 ·
 * 구분 바꾸면 상세구분 = 그 첫 줄(공통) · 빈 값 = 미분류 */
export function libMeta(doc: unknown, edit: boolean, changed: () => void): HTMLElement[] {
  const meta = doc as { 구분?: string | null; 상세구분?: string | null };
  const sub = createSelectField({ options: [], label: tc("Sub"), disabled: !edit });
  const detail = createSelectField({ options: [], label: tc("Detail"), disabled: !edit });
  sub.root.dataset.laborField = "구분";
  detail.root.dataset.laborField = "상세구분";
  let subs: { name: string; details: string[] }[] = [];
  // 목록에 없는 지금 값(빈 것 = 「—」 · 옛 문서)도 선택지로 둠
  const opts = (names: string[], now: string | null | undefined) =>
    [...new Set([now ?? "", ...names])]
      .filter((v, i) => v || i === 0)
      .map((v) => ({ value: v, text: v || "—" }));
  const fill = (): void => {
    sub.setOptions(
      opts(
        subs.map((s) => s.name),
        meta.구분,
      ),
      meta.구분 ?? "",
    );
    const details = subs.find((s) => s.name === meta.구분)?.details ?? [];
    detail.setOptions(opts(details, meta.상세구분), meta.상세구분 ?? "");
  };
  sub.select.addEventListener("change", () => {
    meta.구분 = sub.select.value;
    meta.상세구분 = subs.find((s) => s.name === meta.구분)?.details[0] ?? null;
    fill();
    changed();
  });
  detail.select.addEventListener("change", () => {
    meta.상세구분 = detail.select.value;
    changed();
  });
  fill();
  void fetchStructureDef().then(
    (def) => {
      subs = precomboClasses(def);
      fill();
    },
    () => undefined,
  );
  return [sub.root, detail.root];
}