/* =============================================================================
 * M01_MasterData_UI_Combo_Pick.ts
 * [로직 더하기] 창 — 구분 → 상세구분 → 찾기로 사용자가 로직을 하나씩 고름(자동 추천 없음)
 * ========================================================================== */

import {
  createButton,
  createInputField,
  createSelectField,
  el,
  showToast,
} from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import {
  fetchLogics,
  fetchLogicSubs,
  type LogicSummary,
  type SubBrief,
} from "./M01_MasterData_UI_Logic_Api";
import { tc } from "./M01_MasterData_UI_Combo_Text";

const opts = (values: string[]): { value: string; text: string }[] =>
  [L("M01_All"), ...values].map((v, i) => ({ value: i ? v : "", text: v }));

export function openLogicPicker(done: (logic: LogicSummary) => void): void {
  const subs: SubBrief[] = [];
  let all: LogicSummary[] = [];
  const sub = createSelectField({ options: opts([]), compact: true, label: tc("Sub") });
  const detail = createSelectField({ options: opts([]), compact: true, label: tc("Detail") });
  detail.select.disabled = true;
  const searchField = createInputField({ type: "search", placeholder: tc("Pick_Search") });
  const list = el("div", { className: "m01-logic__pick-list" });
  const hint = el("p", { className: "m01-logic__muted", text: tc("Pick_Hint") });
  const close = (): void => backdrop.remove();

  const find = (): void => {
    const q = searchField.input.value.trim().toLowerCase();
    const found = all.filter(
      (x) =>
        (!sub.select.value || x.구분 === sub.select.value) &&
        (!detail.select.value || x.상세구분 === detail.select.value) &&
        (!q || `${x.키} ${x.이름}`.toLowerCase().includes(q)),
    );
    hint.textContent = found.length ? `${found.length} / ${all.length}` : tc("Pick_None");
    list.replaceChildren(
      ...found.slice(0, 100).map((x) => {
        const row = el("button", {
          className: "m01-logic__pick-row m01-logic__pick-row--button",
          attrs: { type: "button", "data-pick": x.키 },
          children: [
            el("div", {
              className: "m01-logic__stack",
              children: [
                el("strong", { text: x.이름 }),
                el("span", {
                  className: "m01-logic__muted",
                  text: `${x.키} · ${x.구분} ${x.상세구분}`.trim(),
                }),
              ],
            }),
            el("span", { text: `${x.결과단위}${x.blocked ? ` · ${tc("Pick_Blocked")}` : ""}` }),
          ],
        });
        row.addEventListener("click", () => {
          close();
          done(x);
        });
        return row;
      }),
    );
  };
  sub.select.addEventListener("change", () => {
    const d = subs.find((s) => s.name === sub.select.value)?.details ?? [];
    detail.setOptions(opts(d), "");
    detail.select.disabled = d.length === 0;
  });

  const dialog = el("div", {
    className: "m01-logic__pick",
    attrs: { role: "dialog", "aria-label": tc("Pick_Title") },
    children: [
      el("div", {
        className: "m01-logic__section-head",
        children: [
          el("h3", { text: tc("Pick_Title") }),
          createButton({ label: tc("Pick_Close"), variant: "ghost", onClick: close }),
        ],
      }),
      el("div", {
        className: "m01-logic__filters",
        children: [
          sub.root,
          detail.root,
          searchField.root,
          createButton({ label: tc("Pick_Find"), variant: "filled", onClick: find }),
        ],
      }),
      hint,
      list,
    ],
  });
  const backdrop = el("div", { className: "m01-logic__backdrop", children: [dialog] });
  backdrop.addEventListener("click", (ev) => ev.target === backdrop && close());
  backdrop.addEventListener("keydown", (ev) => ev.key === "Escape" && close());
  document.body.append(backdrop);

  void Promise.all([fetchLogicSubs(), fetchLogics()])
    .then(([s, l]) => {
      subs.push(...s);
      all = l;
      sub.setOptions(opts(s.map((x) => x.name)), "");
    })
    .catch((error) =>
      showToast(error instanceof Error ? error.message : tc("Load_Failed"), "error"),
    );
}