/* =============================================================================
 * M02_CF_InputPanel.ts
 * 단가산출 다이어그램 — 입력 상자 판: 갈래(그룹 · 변수) 고르기 · M01 그룹 요소 고르기 · 새 요소(사용자 요소) ·
 * 소요량 · 계수 표 고르기(Table.ts) · 변수 정의(Vars.ts) · 상자 단위
 * M01 Api(`Api_Fetch`)만 가져다 씀 — 마스터에 쓰지 않음(새 요소는 서버 `/api/m02/cf/user-elements` = 시험 폴더 `_data`)
 * 글 [한, 영] 짝은 아래 TEXT · 용어는 정함(입력 · 함수 · 출력 · 다이어그램 · 알약 · 변수 · 단위)
 * ========================================================================== */

import { currentLanguageIndex } from "@ui/ui_template_locale";
import {
  createButton,
  createInputField,
  createSelectField,
  el,
  showToast,
} from "@ui/ui_template_elements";
import {
  fetchFiles,
  fetchRows,
  fetchSubs,
  type SubInfo,
} from "../../M01_MasterData/M01_MasterData_Api_Fetch";
import { cfPlain, cfUserElementAdd, cfUserElements, cfValues } from "./M02_CF_Api";
import type { CfBox, CfElementRef, CfGroup, CfLogic } from "./M02_CF_Model";
import {
  GROUPS,
  M01_OF,
  MACHINE_SEP,
  USER_PREFIX,
  addElement,
  elementOf,
  machineFields,
  queryOf,
  reconcileUnit,
  removeElement,
  setKind,
  valueOf,
  type M01Row,
} from "./M02_CF_InputPanel_Build";
import { renderTablePick } from "./M02_CF_InputPanel_Table";
import { renderVariables } from "./M02_CF_InputPanel_Vars";
import "./M02_CF_InputPanel.css";

/** Api 모양 — 서버 Api 가 채워지면(사용자 요소 = Model 모양 · 값 물음 = ref) 그 모양을 그대로 씀 */
interface Answer {
  id: string;
  ok: boolean;
  value?: number | string | null;
}
interface UserEl {
  id: string;
  group: string;
  name: string;
  spec: string;
  unit: string;
  value: number | null;
}
const apiValues = cfValues as unknown as (items: object[], users?: object[]) => Promise<Answer[]>;
const apiUsers = cfUserElements as unknown as () => Promise<UserEl[]>;
const apiAdd = cfUserElementAdd as unknown as (e: Omit<UserEl, "id">) => Promise<UserEl>;

const TEXT = {
  Kind: ["무엇을 넣을까요?", "What goes in?"],
  Variable: ["변수", "Variable"],
  인력: ["인력", "Labor"],
  재료: ["재료", "Material"],
  유가전력: ["유가·전력", "Fuel · power"],
  기계: ["기계", "Machine"],
  소요량: ["소요량", "Quantity table"],
  계수: ["계수", "Factor table"],
  환율: ["환율", "Exchange rate"],
  요율: ["요율", "Rate"],
  Chosen: [
    "넣은 요소 — 알약마다 이름 · 값 · 단위",
    "Chosen elements — name · value · unit per pill",
  ],
  NoneChosen: ["아직 고른 요소가 없음", "Nothing chosen yet"],
  Remove: ["빼기", "Remove"],
  Put: ["넣기", "Add"],
  Search: ["이름으로 찾기", "Search by name"],
  AllSub: ["전체", "All"],
  SubLabel: ["구분", "Group"],
  DetailLabel: ["상세구분", "Detail"],
  Loading: ["찾는 중…", "Searching…"],
  NoRow: ["찾는 요소 없음", "Nothing found"],
  Count: ["{n} 개 중 앞 {m} 개", "First {m} of {n}"],
  Mine: ["내가 만든 것", "Mine"],
  NewHead: ["새 요소 — 마스터에는 안 쓰고 내 것으로만 저장", "New element — saved as mine only"],
  NewName: ["이름", "Name"],
  NewSpec: ["규격", "Spec"],
  NewUnit: ["단위", "Unit"],
  NewValue: ["값(숫자)", "Value (number)"],
  Make: ["만들어 넣기", "Create and add"],
  NeedName: ["이름을 적어 주세요", "Enter a name"],
  NeedValue: ["값은 숫자로", "Value must be a number"],
  BoxUnit: ["상자 단위", "Box unit"],
  Field: ["값 칸", "Value"],
  NoValue: ["—", "—"],
  Failed: ["불러오지 못함", "Could not load"],
  Pills: ["알약 {n} 개", "{n} pills"],
  NotInput: ["입력 상자를 고르면 이 판이 뜸", "Pick an input box"],
} as const;

type TKey = keyof typeof TEXT;
const t = (key: TKey, v: Record<string, string | number> = {}): string =>
  Object.entries(v).reduce(
    (s, [k, x]) => s.replace(`{${k}}`, String(x)),
    TEXT[key][currentLanguageIndex] as string,
  );

const fmt = (n: number): string => Number(n.toPrecision(8)).toLocaleString("ko-KR");

/** 서버 실패 → 쉬운 말(Api 쉬운 말 길이 아직 없으면 그 글 그대로) */
const plain = (e: unknown): string => {
  try {
    return cfPlain(e);
  } catch {
    return e instanceof Error ? e.message : t("Failed");
  }
};

const fileCache = new Map<string, string>();
/** 그룹의 M01 파일 이름 */
async function fileOf(group: CfGroup): Promise<string> {
  const hit = fileCache.get(group);
  if (hit) return hit;
  const { group: g, part } = M01_OF[group];
  const files = await fetchFiles(g);
  const f = files.find((x) => !part || x.file.includes(part)) ?? files[0];
  fileCache.set(group, f.file);
  return f.file;
}

/** 입력 상자 판 — 고른 입력 상자의 갈래 · 요소 · 표 · 변수를 고침 · 바뀌면 on.change(새 CfLogic) */
export function renderInputPanel(
  host: HTMLElement,
  lg: CfLogic,
  boxId: string,
  on: { change(lg: CfLogic): void },
): void {
  host.className = "m02-cfip";
  const box = lg.boxes.find((b) => b.id === boxId);
  if (!box || box.kind !== "input") {
    host.replaceChildren(el("p", { className: "m02-cfip__muted", text: t("NotInput") }));
    return;
  }
  // 상자 단위가 고른 요소 · 변수 단위와 다르면(견본 등) 맞춰 다시 그림 — 맞으면 바로 지나감
  const fixed = reconcileUnit(lg, boxId);
  if (fixed !== lg) return on.change(fixed);
  const input = box.input ?? { mode: "variable" as const, elements: [], variables: [] };
  const kind: CfGroup | "변수" = input.mode === "variable" ? "변수" : (input.group ?? "인력");
  const body = el("div", { className: "m02-cfip__body" });

  // ① 갈래 — 그룹 여덟 + 변수
  const kinds = el("div", {
    className: "m02-cfip__chips",
    attrs: { role: "tablist", "aria-label": t("Kind") },
    children: [...GROUPS, "변수" as const].map((k) => {
      const b = el("button", {
        className: `m02-cfip__chip${k === kind && (k !== "변수" ? input.mode === "group" : true) ? " is-on" : ""}`,
        attrs: { type: "button", role: "tab" },
        text: k === "변수" ? t("Variable") : t(k),
      });
      b.addEventListener("click", () => k !== kind && on.change(setKind(lg, boxId, k)));
      return b;
    }),
  });
  const unit = el("p", {
    className: "m02-cfip__unit",
    text: `${t("BoxUnit")}: ${box.unit || "-"}`,
  });
  host.replaceChildren(el("h4", { text: t("Kind") }), kinds, unit, body);

  if (kind === "변수") renderVariables(body, lg, boxId, on);
  else if (kind === "소요량" || kind === "계수") renderTablePick(body, lg, boxId, kind, on);
  else renderGroup(body, lg, box, kind, on);
}

/** 그룹 요소 — 고른 것 목록 · 찾기 · 새 요소 */
function renderGroup(
  host: HTMLElement,
  lg: CfLogic,
  box: CfBox,
  group: CfGroup,
  on: { change(lg: CfLogic): void },
): void {
  const chosen = el("div", { className: "m02-cfip__chosen" });
  const find = el("div", { className: "m02-cfip__find" });
  host.replaceChildren(chosen, find, newForm(lg, box, group, on));
  drawChosen(chosen, lg, box, group, on);
  void drawFind(find, lg, box, group, on);
}

/** 고른 요소마다 알약 한 줄 — 이름 · 값 · 단위 · 값은 Api 가 마스터에서 */
function drawChosen(
  host: HTMLElement,
  lg: CfLogic,
  box: CfBox,
  group: CfGroup,
  on: { change(lg: CfLogic): void },
): void {
  const els = box.input?.elements ?? [];
  const values = new Map<string, HTMLElement>();
  host.replaceChildren(
    el("h5", { text: `${t("Chosen")} · ${t("Pills", { n: els.length })}` }),
    ...(els.length
      ? els.map((e) => {
          const val = el("strong", { className: "m02-cfip__value", text: t("NoValue") });
          values.set(e.ref, val);
          return el("div", {
            className: "m02-cfip__item",
            children: [
              el("span", { className: "m02-cfip__name", text: e.name }),
              val,
              el("span", { className: "m02-cfip__muted", text: e.unit || "-" }),
              createButton({
                label: t("Remove"),
                variant: "ghost",
                size: "sm",
                onClick: () => on.change(removeElement(lg, box.id, e.ref)),
              }),
            ],
          });
        })
      : [el("p", { className: "m02-cfip__muted", text: t("NoneChosen") })]),
  );
  if (!els.length) return;
  const items = els.map((e) => ({ id: e.ref, ...queryOf(group, e.ref) }));
  void apiValues(items, lg.userElements).then(
    (answers) =>
      answers.forEach((a) => {
        const node = values.get(a.id);
        if (node && a.ok && a.value !== null && a.value !== undefined)
          node.textContent = typeof a.value === "number" ? fmt(a.value) : String(a.value);
      }),
    // Api 가 아직 값을 못 주면 M01 줄에서 바로 읽어 보임(값 칸만 — 요소는 그대로)
    () =>
      els.forEach(
        (e) =>
          void m01Value(group, e).then((v) => {
            const node = values.get(e.ref);
            if (node && v !== null) node.textContent = fmt(v);
          }),
      ),
  );
}

/** 요소 한 개의 값을 M01 줄에서 읽음 — 이름으로 찾아 키가 같은 줄 · 못 찾으면 null */
async function m01Value(group: CfGroup, e: CfElementRef): Promise<number | null> {
  if (e.ref.startsWith(USER_PREFIX)) return null;
  try {
    const [key, field] = e.ref.split(MACHINE_SEP);
    const page = await fetchRows(
      await fileOf(group),
      1,
      30,
      e.name.split(" · ")[0].split(" ")[0],
      false,
      "",
      "",
    );
    const row = (page.rows as M01Row[]).find((r) => r["키"] === key);
    return row ? valueOf(group, row, field || "가격") : null;
  } catch {
    return null;
  }
}

/** M01 줄 찾기 — 구분 · 상세구분 · 이름 · 내가 만든 것도 함께 */
async function drawFind(
  host: HTMLElement,
  lg: CfLogic,
  box: CfBox,
  group: CfGroup,
  on: { change(lg: CfLogic): void },
): Promise<void> {
  const q = createInputField({ type: "search", placeholder: t("Search"), compact: true });
  const list = el("div", { className: "m02-cfip__list" });
  const count = el("span", { className: "m02-cfip__muted" });
  const bar: HTMLElement[] = [];
  let file = "";
  let sub = "";
  let detail = "";
  let subs: SubInfo[] = [];
  const all = { value: "", text: t("AllSub") };
  const subBox = createSelectField({
    options: [all],
    value: "",
    compact: true,
    ariaLabel: t("SubLabel"),
    onChange: (v) => ((sub = v), (detail = ""), fillDetail(), void load()),
  });
  const detailBox = createSelectField({
    options: [all],
    value: "",
    compact: true,
    ariaLabel: t("DetailLabel"),
    onChange: (v) => ((detail = v), void load()),
  });
  const fillDetail = (): void => {
    const d = subs.find((s) => s.name === sub)?.details ?? [];
    detailBox.root.hidden = !d.length;
    detailBox.setOptions([all, ...d.map((x) => ({ value: x, text: x }))], "");
  };
  fillDetail();
  let seq = 0;
  const load = async (): Promise<void> => {
    const mine = ++seq;
    list.replaceChildren(el("p", { className: "m02-cfip__muted", text: t("Loading") }));
    try {
      const word = q.input.value.trim();
      const [page, users] = await Promise.all([
        fetchRows(file, 1, 40, word, false, sub, detail),
        apiUsers().catch((): UserEl[] => []),
      ]);
      if (mine !== seq) return;
      const known = new Map<string, UserEl>();
      for (const u of [...lg.userElements, ...users])
        if (u.group === group) known.set(u.id, u as UserEl);
      const mineRows: M01Row[] = [...known.values()]
        .filter((u) => !word || `${u.name} ${u.spec}`.includes(word))
        .map((u) => ({
          키: u.id,
          이름: u.name,
          규격: u.spec,
          단위: u.unit,
          값: u.value,
          __mine: true,
        }));
      const rows = [...mineRows, ...(page.rows as M01Row[])];
      count.textContent = t("Count", { n: page.total + mineRows.length, m: rows.length });
      list.replaceChildren(
        ...(rows.length
          ? rows.map((r) => rowOf(r))
          : [el("p", { className: "m02-cfip__muted", text: t("NoRow") })]),
      );
    } catch (e) {
      if (mine === seq)
        list.replaceChildren(el("p", { className: "m02-cfip__muted", text: plain(e) }));
    }
  };
  const rowOf = (r: M01Row): HTMLElement => {
    const fields = group === "기계" ? machineFields(r) : [];
    const field = createSelectField({
      options: fields.map((f) => ({ value: f, text: f })),
      value: fields.includes("가격") ? "가격" : (fields[0] ?? ""),
      compact: true,
      ariaLabel: t("Field"),
    });
    const pick = (): CfLogic =>
      addElement(lg, box.id, elementOf(group, r, field.select.value || "가격"));
    const v = valueOf(group, r, field.select.value || "가격");
    const unitText = group === "기계" ? "" : String(r["단위"] ?? "");
    const b = el("button", {
      className: "m02-cfip__row",
      attrs: { type: "button" },
      children: [
        el("span", {
          className: "m02-cfip__name",
          children: [
            el("strong", { text: String(r["이름"] ?? "") }),
            el("span", { className: "m02-cfip__muted", text: ` ${r["규격"] ?? ""}` }),
            ...(r["__mine"] ? [el("span", { className: "m02-cfip__tag", text: t("Mine") })] : []),
          ],
        }),
        el("span", {
          className: "m02-cfip__muted",
          text: `${v === null ? "" : fmt(v)} ${unitText}`.trim(),
        }),
      ],
    });
    b.addEventListener("click", () => on.change(pick()));
    return el("div", {
      className: "m02-cfip__rowbox",
      children: [b, ...(fields.length ? [field.root] : [])],
    });
  };
  try {
    file = await fileOf(group);
    subs = await fetchSubs({ file }).catch(() => []);
    subBox.setOptions([all, ...subs.map((s) => ({ value: s.name, text: s.name }))], "");
    subBox.root.hidden = !subs.length;
    bar.push(subBox.root, detailBox.root);
  } catch (e) {
    host.replaceChildren(el("p", { className: "m02-cfip__muted", text: plain(e) }));
    return;
  }
  let timer = 0;
  q.input.addEventListener(
    "input",
    () => (window.clearTimeout(timer), (timer = window.setTimeout(load, 250))),
  );
  host.replaceChildren(
    el("div", { className: "m02-cfip__bar", children: [...bar, q.root] }),
    count,
    list,
  );
  void load();
  void USER_PREFIX;
}

/** 새 요소 — M01 표 「추가」 화면 꼴(이름 · 규격 · 단위 · 값) · 마스터에 안 쓰고 사용자 요소로 */
function newForm(
  lg: CfLogic,
  box: CfBox,
  group: CfGroup,
  on: { change(lg: CfLogic): void },
): HTMLElement {
  const name = createInputField({ type: "text", label: t("NewName"), compact: true });
  const spec = createInputField({ type: "text", label: t("NewSpec"), compact: true });
  const unit = createInputField({ type: "text", label: t("NewUnit"), compact: true });
  const value = createInputField({ type: "text", label: t("NewValue"), compact: true });
  const go = createButton({
    label: t("Make"),
    onClick: () => {
      const n =
        value.input.value.trim() === "" ? null : Number(value.input.value.replace(/,/g, ""));
      if (!name.input.value.trim()) return name.setError(t("NeedName"));
      if (n !== null && !Number.isFinite(n)) return value.setError(t("NeedValue"));
      name.setError(undefined);
      value.setError(undefined);
      apiAdd({
        group,
        name: name.input.value.trim(),
        spec: spec.input.value.trim(),
        unit: unit.input.value.trim(),
        value: n,
      }).then(
        (made) => {
          const el1 = elementOf(group, {
            키: made.id,
            이름: made.name,
            규격: made.spec,
            단위: made.unit,
            값: made.value,
          });
          const withUser: CfLogic = {
            ...lg,
            userElements: [...lg.userElements.filter((u) => u.id !== made.id), { ...made, group }],
          };
          on.change(addElement(withUser, box.id, el1));
        },
        (e) => showToast(plain(e), "error"),
      );
    },
  });
  const d = el("details", {
    className: "m02-cfip__new",
    children: [
      el("summary", { text: t("NewHead") }),
      name.root,
      spec.root,
      unit.root,
      value.root,
      go,
    ],
  });
  return d;
}