/* =============================================================================
 * M01_MasterData_UI_LogicLab_New_Find.ts
 * 새 로직 만들기의 고르기 창 둘
 *  ① 마스터 요소 — 종류(인력·재료·기계) → 구분 → 상세구분 → 이름 찾기 → 한 줄 고르기
 *  ② 표 찾기 — 표(소요량·계수)와 값 칸을 고른 뒤 표의 조건 칸마다 식을 적음
 * ========================================================================== */

import {
  createButton,
  createInputField,
  createSelectField,
  el,
  showToast,
} from "@ui/ui_template_elements";
import {
  fetchFiles,
  fetchRows,
  fetchSubsAll,
  type FileInfo,
  type SubInfo,
} from "./M01_MasterData_Api_Fetch";
import type { DraftFind } from "./M01_MasterData_UI_Logic_Api";
import { formatNumber } from "./M01_MasterData_UI_Logic_Edit";
import { loadTable } from "./M01_MasterData_UI_Logic_Note";
import { openPicker } from "./M01_MasterData_UI_Logic_Pick";
import { tn } from "./M01_MasterData_UI_LogicLab_New_Text";

export interface PickedElement {
  ref: string;
  /** 이름 + 규격 */
  name: string;
  /** 수량에 쓰는 단위(「원/일」 → 「일」) */
  unit: string;
  group: string;
}

const GROUPS = ["인력", "재료", "기계"];
const SHOWN = 50;

/** 창 뼈대 — 제목 · 닫기 · 몸통 */
function shell(title: string, body: HTMLElement[]): { close: () => void } {
  const close = (): void => backdrop.remove();
  const dialog = el("div", {
    className: "m01-logic__pick",
    attrs: { role: "dialog", "aria-label": title },
    children: [
      el("div", {
        className: "m01-logic__section-head",
        children: [
          el("h3", { text: title }),
          createButton({ label: tn("Close"), variant: "ghost", onClick: close }),
        ],
      }),
      ...body,
    ],
  });
  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);
  return { close };
}

/** 그룹의 파일 — 재료는 자재품목(구분·상세구분이 있는 것) */
async function fileOf(group: string): Promise<FileInfo | undefined> {
  const files = await fetchFiles(group);
  return group === "재료" ? (files.find((f) => f.file.includes("자재품목")) ?? files[0]) : files[0];
}

const options = (values: string[]): { value: string; text: string }[] => [
  { value: "", text: tn("All") },
  ...values.map((v) => ({ value: v, text: v })),
];

export function openElementPick(done: (picked: PickedElement) => void): void {
  let file: FileInfo | undefined;
  let subs: SubInfo[] = [];
  const groupBox = createSelectField({
    options: GROUPS.map((g) => ({ value: g, text: g })),
    value: GROUPS[0],
    compact: true,
    label: tn("Group"),
  });
  const subBox = createSelectField({
    options: options([]),
    value: "",
    compact: true,
    label: tn("Sub"),
  });
  const detailBox = createSelectField({
    options: options([]),
    value: "",
    compact: true,
    label: tn("Detail"),
  });
  const searchField = createInputField({ type: "search", placeholder: tn("Search") });
  const count = el("span", { className: "m01-logic__muted" });
  const list = el("div", { className: "m01-logic__pick-list" });
  const win = shell(tn("K_master"), [
    el("div", {
      className: "m01-logic__pick-bar",
      children: [groupBox.root, subBox.root, detailBox.root, searchField.root, count],
    }),
    list,
  ]);

  let seq = 0;
  const load = async (): Promise<void> => {
    if (!file) return;
    const mine = ++seq;
    try {
      const got = await fetchRows(
        file.file,
        1,
        SHOWN,
        searchField.input.value.trim(),
        false,
        subBox.select.value,
        detailBox.select.value,
      );
      if (mine !== seq) return;
      count.textContent = tn("Count", { n: got.total, m: Math.min(got.total, SHOWN) });
      list.replaceChildren(
        ...got.rows.map((row) => {
          const name = `${row["이름"] ?? ""} ${row["규격"] ?? ""}`.trim();
          const unitText = String(row["단위"] ?? "");
          const unit = groupBox.select.value === "인력" ? "인" : (unitText.split("/").pop() ?? "");
          const button = el("button", {
            className: "m01-logic__pick-row m01-logic__pick-row--button",
            attrs: { type: "button", "data-ref": String(row["키"]) },
            children: [
              el("div", {
                className: "m01-logic__stack",
                children: [
                  el("strong", { text: name }),
                  el("span", { className: "m01-logic__muted", text: String(row["키"]) }),
                ],
              }),
              el("span", {
                className: "m01-logic__money",
                text: `${formatNumber(row["값"])} ${unitText}`.trim(),
              }),
            ],
          });
          button.addEventListener("click", () => {
            win.close();
            done({ ref: String(row["키"]), name, unit, group: groupBox.select.value });
          });
          return button;
        }),
      );
    } catch (error) {
      showToast(error instanceof Error ? error.message : tn("Failed"), "error");
    }
  };

  const changeGroup = async (): Promise<void> => {
    file = await fileOf(groupBox.select.value);
    subs = file ? (await fetchSubsAll({ file: file.file })).subs : [];
    subBox.setOptions(options(subs.map((s) => s.name)), "");
    detailBox.setOptions(options([]), "");
    detailBox.select.disabled = true;
    await load();
  };
  groupBox.select.addEventListener("change", () => void changeGroup());
  subBox.select.addEventListener("change", () => {
    const details = subs.find((s) => s.name === subBox.select.value)?.details ?? [];
    detailBox.setOptions(options(details), "");
    detailBox.select.disabled = details.length === 0;
    void load();
  });
  detailBox.select.addEventListener("change", () => void load());
  let timer = 0;
  searchField.input.addEventListener("input", () => {
    window.clearTimeout(timer);
    timer = window.setTimeout(() => void load(), 250);
  });
  void changeGroup();
}

/** 표 찾기 — 표·값 칸을 고른 뒤 조건 칸마다 식을 받음 · 표의 조건 칸이 없으면 바로 끝 */
export function openTablePick(done: (find: DraftFind, label: string) => void): void {
  openPicker("table", "소요량", (item, column) => {
    void (async () => {
      const table = await loadTable(item.ref);
      const conds = Object.keys(table?.조건 ?? {});
      const label = `${item.이름 ?? item.ref} · ${item.ref} → ${column ?? ""}`;
      const find = { 표: item.ref, 값칸: column ?? "", 조건: {} as Record<string, string> };
      if (!conds.length) {
        done(find, label);
        return;
      }
      const inputs = conds.map((c) => {
        const box = createInputField({ type: "text", value: c });
        box.input.setAttribute("data-cond", c);
        return { c, box };
      });
      const win = shell(tn("TableTitle"), [
        el("p", { className: "m01-logic__muted", text: label }),
        el("p", { text: tn("Cond") }),
        ...inputs.map(({ c, box }) =>
          el("label", {
            className: "m01-logic__field",
            children: [el("span", { text: c }), box.root],
          }),
        ),
        createButton({
          label: tn("Ok"),
          onClick: () => {
            for (const { c, box } of inputs) find.조건[c] = box.input.value.trim() || c;
            win.close();
            done(find, label);
          },
        }),
      ]);
    })();
  });
}