/* =============================================================================
 * M01_MasterData_UI_Logic_PickTable.ts
 * 시험 계산의 재료 · 기계 고르기 모달 — 마스터 컨테이너와 같은 표(`GET /rows`) · 쪽 나눔 · 칸 글
 * 검색 칸을 채워 열고 · 잡힌 품목 칠함 · 한 줄 누르면 고름 · 저장 안 함(읽기만)
 * ========================================================================== */

import { createButton, createInputField, el, showToast } from "@ui/ui_template_elements";
import { fetchRows, type Row } from "./M01_MasterData_Api_Fetch";
import { buildPager, flatten, show } from "./M01_MasterData_UI_Cells";
import { tx } from "./M01_MasterData_UI_Logic_Text";

export type PickTableKind = "재료" | "기계";

const FILES: Record<PickTableKind, string> = { 재료: "재료_자재품목.json", 기계: "기계.json" };
/** 표에 보일 칸 — 컨테이너 표의 칸 이름(묶음 값은 「값›가격」) */
const COLS: Record<PickTableKind, string[]> = {
  재료: [
    "키",
    "구분",
    "상세구분",
    "이름",
    "규격",
    "단위",
    "물가자료",
    "유통물가",
    "물가정보",
    "거래가격",
  ],
  기계: ["원문번호", "구분", "상세구분", "이름", "규격", "값›가격"],
};
const SIZE = 30;

export interface PickTableOptions {
  kind: PickTableKind;
  title: string;
  /** 검색 칸을 채워 엶 — 결과가 없으면 첫 낱말만으로 다시 · 그래도 없으면 `alt` 를 차례로 */
  seed: string;
  alt?: string[];
  /** 지금 잡힌 줄이면 true — 그 줄을 칠함 */
  isCurrent: (row: Row) => boolean;
  onPick: (row: Row) => void;
}

export function openPickTable(opt: PickTableOptions): void {
  const close = (): void => back.remove();
  const searchField = createInputField({
    type: "search",
    placeholder: tx("Pick_Search"),
    value: opt.seed,
  });
  const search = searchField.input;
  const host = el("div", { className: "m01-logic__pick-list" });
  const dialog = el("div", {
    className: "m01-logic__pick m01-logic__pick--table",
    attrs: { role: "dialog", "aria-label": opt.title },
    children: [
      el("div", {
        className: "m01-logic__section-head",
        children: [
          el("h3", { text: opt.title }),
          createButton({ label: tx("Pick_Close"), variant: "ghost", onClick: close }),
        ],
      }),
      searchField.root,
      host,
    ],
  });
  const back = el("div", { className: "m01-logic__backdrop", children: [dialog] });
  back.addEventListener("click", (ev) => ev.target === back && close());
  back.addEventListener("keydown", (ev) => ev.key === "Escape" && close());

  let page = 1;
  const tried = new Set([opt.seed]);
  let seq = 0;
  const load = async (fallback = false): Promise<void> => {
    const mine = ++seq;
    try {
      const q = search.value.trim();
      const got = await fetchRows(FILES[opt.kind], page, SIZE, q);
      if (mine !== seq) return; // 최신 응답만
      if (!got.total && fallback) {
        const next = [...(q.includes(" ") ? [q.split(/\s+/)[0]] : []), ...(opt.alt ?? [])].find(
          (w) => w && !tried.has(w),
        );
        if (next) {
          tried.add(next);
          search.value = next;
          return load(true);
        }
      }
      const cols = COLS[opt.kind];
      const body = got.rows.map((row) => {
        const flat = flatten(row);
        const tr = el("tr", {
          className: `m01lab__pickrow${opt.isCurrent(row) ? " is-picked" : ""}`,
          children: cols.map((c) =>
            el("td", { text: show(flat[c]), attrs: { title: show(flat[c]) } }),
          ),
        });
        tr.addEventListener("click", () => {
          close();
          opt.onPick(row);
        });
        return tr;
      });
      host.replaceChildren(
        buildPager(got.total, SIZE, got.page, (next) => {
          page = next;
          void load();
        }),
        el("div", {
          className: "m01-master__grid-wrap",
          children: [
            el("table", {
              className: "m01-master__grid",
              children: [
                el("thead", {
                  children: [el("tr", { children: cols.map((c) => el("th", { text: c })) })],
                }),
                el("tbody", { children: body }),
              ],
            }),
          ],
        }),
      );
      host.querySelector(".is-picked")?.scrollIntoView({ block: "nearest" });
    } catch (error) {
      showToast(error instanceof Error ? error.message : tx("Load_Failed"), "error");
    }
  };
  let timer = 0;
  search.addEventListener("input", () => {
    window.clearTimeout(timer);
    timer = window.setTimeout(() => {
      page = 1;
      void load();
    }, 300);
  });
  document.body.append(back);
  search.focus();
  void load(true);
}