/* =============================================================================
 * M01_MasterData_UI_Pick.ts
 * 고르기 모달 — 조달 자료(나라장터) · 가격 연결(시중물가) · 준용 직종을 이름·규격으로 찾아 고르면 ref 를 돌려줌
 * ========================================================================== */

import { el, showToast } from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import { fetchPick, type PickItem, type PickKind } from "./M01_MasterData_Api_Fetch";
import { show } from "./M01_MasterData_UI_Cells";

/** 지역이 갈리는 재료 — 이름·규격만 적어 두고 지역은 계산 때 입력. */
export interface Cond {
  이름: string;
  규격: string;
  지역: "입력";
}

export interface PickOptions {
  kind: PickKind;
  title: string;
  /** 지금 연결 글 — 비면 「연결 끊기」 꺼짐. */
  current: string;
  /** 처음 찾을 글 — 그 재료 이름·규격 (없는 결과면 첫 낱말만으로 다시). */
  seed: string;
  /** 고르면 ref · 연결 끊기 = null. */
  onPick: (ref: string | null) => void;
  /** 있으면 「후보 조건으로 연결」 칸이 뜸. */
  cond?: { 이름: string; 규격: string; onCond: (c: Cond) => void };
}

const button = (text: string): HTMLButtonElement =>
  el("button", { className: "m01-master__row-btn", text, attrs: { type: "button" } });

const input = (value: string, placeholder: string): HTMLInputElement => {
  const box = el("input", {
    className: "m01-master__search",
    attrs: { type: "search", placeholder },
  });
  box.value = value;
  return box;
};

export function openPickModal(opt: PickOptions): void {
  const close = (): void => back.remove();
  const search = input(opt.seed, L("M01_ProcureSearch"));
  const list = el("div", { className: "m01-procure__list" });
  const cut = button(L("M01_ProcureCut"));
  cut.disabled = !opt.current;
  cut.addEventListener("click", () => {
    opt.onPick(null);
    close();
  });
  const shut = button(L("M01_ProcureClose"));
  shut.addEventListener("click", close);

  const condRow: HTMLElement[] = [];
  if (opt.cond) {
    const { onCond } = opt.cond;
    const name = input(opt.cond.이름, L("M01_PriceCondName"));
    const spec = input(opt.cond.규격, L("M01_PriceCondSpec"));
    const go = button(L("M01_PriceCond"));
    go.addEventListener("click", () => {
      if (!name.value.trim()) return;
      onCond({ 이름: name.value.trim(), 규격: spec.value.trim(), 지역: "입력" });
      close();
    });
    condRow.push(el("div", { className: "m01-procure__cond", children: [name, spec, go] }));
  }

  const box = el("div", {
    className: "m01-procure__box",
    children: [
      el("h3", { text: opt.title }),
      el("p", { className: "m01-master__muted", text: opt.current }),
      search,
      list,
      ...condRow,
      el("div", { className: "m01-procure__foot", children: [cut, shut] }),
    ],
  });
  const back = el("div", { className: "m01-procure", children: [box] });
  back.addEventListener("click", (e) => {
    if (e.target === back) close();
  });
  document.body.append(back);

  const paint = (items: PickItem[], total: number): void => {
    list.replaceChildren(
      ...(items.length
        ? items.map((it) => {
            const tag = it.관급 ? ` · ${L("M01_Govt")}` : "";
            const b = el("button", {
              className: "m01-procure__item",
              attrs: { type: "button" },
              children: [
                el("strong", { text: it.이름 }),
                el("span", { text: `${it.규격} · ${it.단위} · ${show(it.값)}${tag}` }),
                el("span", { className: "m01-master__muted", text: it.ref }),
              ],
            });
            b.addEventListener("click", () => {
              opt.onPick(it.ref);
              close();
            });
            return b;
          })
        : [el("p", { className: "m01-master__empty", text: L("M01_NoRows") })]),
      ...(total > items.length
        ? [el("p", { className: "m01-master__muted", text: `${items.length} / ${total}` })]
        : []),
    );
  };
  let timer: number | undefined;
  const run = async (fallback = false): Promise<void> => {
    try {
      const q = search.value.trim();
      const r = await fetchPick(opt.kind, q);
      if (!r.total && fallback && q.includes(" ")) {
        search.value = q.split(/\s+/)[0];
        return run();
      }
      paint(r.items, r.total);
    } catch (error) {
      showToast(error instanceof Error ? error.message : L("M01_LoadFailed"), "error");
    }
  };
  search.addEventListener("input", () => {
    window.clearTimeout(timer);
    timer = window.setTimeout(() => void run(), 300);
  });
  void run(true);
  search.focus();
}