/* =============================================================================
 * M01_MasterData_UI_LogicLab.ts
 * 관리자 화면 — 로직 칸. 로직을 열면 두 칸 — 왼쪽 수식(줄 쌓기 `A00_Common/line_stack_screen.ts` · 804-6) · 단가산출 상세 / 오른쪽 원문
 * 셈 = 화면 칸 없이 구동(`_Logic_Drive.ts` · 799-2) — 열 때 첫 셈 · 입력 · 시험 고침 · 재료 고름이 `drive.run`
 * 로직 목록(원문·장 고르기 · 찾기 · 막힘 거름)은 왼쪽 패널 「단가산출 로직」 컨테이너(`listHost`) 안
 *
 * 데이터 흐름(CLAUDE.md 5장) — 고친 것은 캐시(sessionStorage)에 쌓고 [저장] 한 번에 `POST /save`.
 * 409 = 그 사이 파일이 바뀜 · 422 = 검사 걸림(아무것도 안 씀) — 까닭은 서버 글 그대로 보임.
 * 머리 단추(804-7 · 요구 687-2) = [신규 로직] · [로직 복사/생성] · [로직 삭제] · [되돌림] · [저장] · 목록에선 [신규 로직]만(요구 693)
 *   [저장] = 기본정보 · 별칭(로직 줄 `/save`) + 수식(줄 쌓기 `/logic/doc/save`) 한 번에 · [되돌림] = 둘 다 저장 뒤 상태로
 *   [로직 삭제] = 확인 → 서버 정본에서 바로(`/logic/remove` — 로직 줄 + 수식 문서 · 부르는 곳 있으면 막고 까닭) → 로직 목록
 * ========================================================================== */

import { t as L } from "@ui/ui_template_locale";
import {
  createButton,
  el,
  hideLoadingOverlay,
  showConfirmDialog,
  showLoadingOverlay,
  showToast,
} from "@ui/ui_template_elements";
import {
  ApiError,
  fetchLogic,
  fetchLogicFiles,
  fetchLogics,
  fetchLogicSubs,
  fetchLogicUsers,
  removeLogic,
  saveFiles,
  type CalcLine,
  type TextAnswer,
  type ElementBrief,
  type LogicRow,
  type LogicSummary,
  type SaveFile,
} from "./M01_MasterData_UI_Logic_Api";
import { createDrive } from "./M01_MasterData_UI_Logic_Drive";
import { buildList, logicId, type ListItem, type ListMark } from "./M01_MasterData_UI_Logic_List";
import type { SideHandle } from "./M01_MasterData_UI_Side";
import { tx } from "./M01_MasterData_UI_Logic_Text";
import { buildLabDetail, isOwnLogic, trial } from "./M01_MasterData_UI_LogicLab_Detail";
import { setLogicOpener } from "./M01_MasterData_UI_LogicLab_Modal";
import { openCopyScreen } from "./M01_MasterData_UI_LogicLab_Copy";
import { tl } from "./M01_MasterData_UI_LogicLab_Text";
import { askBasicInfo } from "./M01_MasterData_UI_LogicLab_Basic";
import { saveRevised } from "./M01_MasterData_UI_LogicLab_Revise";
import { buildLogicSide } from "./M01_MasterData_UI_LogicLab_Side";
import { createViewPicker } from "./M01_MasterData_UI_LogicLab_View";
import { createStackScreen } from "../A00_Common/line_stack_screen";
import { buildHeadBar } from "./M01_MasterData_UI_Head";
import { fetchSessionUser } from "../A06_Login/A06_Login_Api_Fetch";
import "./M01_MasterData_UI_Logic_Style.css";
import { createEmpty } from "@ui/ui_template_empty";

/** 저장 안 한 로직 하나 — origKey null = 새 로직 · row null = 지움 */
interface Draft {
  /** 구분(원문 + 부문) — 목록 id 를 세움 */
  sub: string;
  file: string;
  version: string;
  origKey: string | null;
  row: LogicRow | null;
}

interface Opened extends Draft {
  id: string;
  row: LogicRow | null;
  original: string | null;
  prices: Record<string, ElementBrief | null>;
  reasons: string[];
  lines: CalcLine[] | null;
  text: TextAnswer | null;
  /** 마지막으로 잘 받은 읽는 식 — 멈춘 뒤에도 수량 칸 조각을 이걸로 */
  lastText?: TextAnswer;
  ownHost: HTMLElement;
  values: Record<string, string>;
}

const OWN_FILE = "로직_자체.json";
/** 시험 계산에 넘길 줄 — 시험 고침(722-2) 덮은 사본 */
const calcRow = (row: LogicRow | null): LogicRow | null => trial.apply(row);

const cacheKey = "m01_logic_drafts_lab";
const ownHost = (): HTMLElement => el("div", { className: "m01lab__own" });
const clone = <T>(v: T): T => JSON.parse(JSON.stringify(v)) as T;

function loadDrafts(): Record<string, Draft> {
  try {
    return JSON.parse(sessionStorage.getItem(cacheKey) ?? "{}") as Record<string, Draft>;
  } catch {
    return {};
  }
}

export interface LogicHandle {
  /** 밖(요소 화면)에서 이 키를 바로 엶 — 소요량·계수 표의 「쓰는 로직」 눌렀을 때. */
  openKey: (key: string) => Promise<void>;
}

export async function mountM01LogicLab(
  host: HTMLElement,
  side: SideHandle,
  openKey?: string,
): Promise<LogicHandle> {
  let drafts = loadDrafts();
  let opened: Opened | null = null;
  let calcInputs = "";
  const admin = await fetchSessionUser()
    .then((u) => u?.role === "SYSTEM_ADMIN")
    .catch(() => false);
  let recalc: number | undefined;
  const drive = createDrive();
  // 수식 = 줄 쌓기(804-2 · 804-6 옛 수식 문서 탭 걷음) — 수식 문서 · 캐시 m01_doc_drafts
  const stack = createStackScreen({
    base: "/m01/logic/doc",
    admin,
    cache: "m01_doc_drafts",
    page: () => persist(),
  });
  const leave = (): Promise<boolean> => stack.canLeave();
  const editor = el("div", { className: "m01-logic__editor" });
  // 로직 상세 — 왼쪽 지금 내용 · 오른쪽 접는 패널 「원문」
  const panes = buildLogicSide(editor);
  // 보기 고르기 — 머리줄 [신규 로직] 왼쪽
  const views = createViewPicker(editor, (v) => {
    if (v === "stack") stack.draw(opened?.origKey ?? "", true);
  });
  const errors = el("div", {
    className: "ui-banner ui-banner--danger m01-logic__reasons",
    attrs: { hidden: "" },
  });
  const filterHost = el("div");
  const waiting = el("p", { className: "ui-text ui-text--muted", text: tx("Loading") });
  let loaded = false; // 첫 목록이 오기 전에는 「0 줄」 빈 표를 보이지 않음
  const pending = el("span", { className: "ui-text ui-text--muted" });
  const list = buildList(
    (item) => void open(item.id, item.sub, item.key),
    (item, alias) => void onAlias(item, alias),
  );
  const back = createButton({
    label: tx("Bar_Back"),
    variant: "ghost",
    onClick: () => void leave().then((ok) => ok && show(null)),
  });

  const persist = (): void => {
    try {
      sessionStorage.setItem(cacheKey, JSON.stringify(drafts));
    } catch {
      /* 캐시가 막혀도 화면 안의 고친 것은 남음 */
    }
    const marks = new Map<string, ListMark>();
    const extra: ListItem[] = [];
    const aliases = new Map<string, string>();
    for (const [id, d] of Object.entries(drafts)) {
      marks.set(id, d.origKey === null ? "new" : d.row === null ? "deleted" : "edited");
      if (d.row) aliases.set(id, d.row.별칭 ?? "");
      if (d.origKey === null && d.row) {
        extra.push({
          id,
          sub: d.sub,
          detail: "",
          key: d.row.키,
          number: d.row.원문번호,
          name: d.row.이름,
          alias: d.row.별칭 ?? "",
          unit: d.row.결과단위,
          source: d.row.출처,
          blocked: false,
          reasons: [],
        });
      }
    }
    list.setMarks(marks, extra, aliases);
    const n = Object.keys(drafts).length;
    pending.textContent = n ? tx("Bar_Pending", { n }) : "";
    saveButton.disabled = discardButton.disabled = n === 0 && !stack.dirty(); // 로직 줄 · 수식 둘 다 봄
  };

  const touch = (): void => {
    if (!opened?.row) return;
    const now = JSON.stringify(opened.row);
    if (opened.origKey !== null && now === opened.original) delete drafts[opened.id];
    else drafts[opened.id] = pick(opened, clone(opened.row));
    persist();
    const inputs = JSON.stringify(calcRow(opened.row)?.입력 ?? []);
    if (inputs !== calcInputs) drawCalc();
    if (isOwnLogic(opened.row)) {
      // 자체 로직 — 고친 뒤 잠시 쉬면 다시 계산해 호표 소계와 텍스트 수식을 새로 그림
      window.clearTimeout(recalc);
      recalc = window.setTimeout(() => void drive.run(), 700);
    }
  };

  const pick = (o: Opened, row: LogicRow | null): Draft => ({
    sub: o.sub,
    file: o.file,
    version: o.version,
    origKey: o.origKey,
    row,
  });

  /** 구동을 지금 로직으로 (다시) 시작 — 읽는 식 미리보기 · 첫 셈 */
  const drawCalc = (): void => {
    if (!opened?.row) {
      drive.stop();
      return;
    }
    const current = opened;
    calcInputs = JSON.stringify(calcRow(current.row)?.입력 ?? []);
    drive.start({
      savedKey: current.origKey,
      file: current.file,
      row: calcRow(current.row) as LogicRow,
      dirty: () => current.id in drafts || trial.has(current.row),
      values: current.values,
      onText: (text) => {
        current.text = text;
        if (text.ok) current.lastText = text;
        drawEditor(); // [계산] 전 미리보기 응답도 왼쪽 이름 식 칸에 바로 비치게 — onLines 와 같은 자리
      },
      onLines: (lines) => {
        current.lines = lines;
        drawEditor();
      },
    });
  };

  const drawEditor = (): void => {
    const listing = !opened; // 고른 로직이 없으면 목록 · 있으면 호표 표 + 시험 계산
    list.root.hidden = !listing || !loaded;
    waiting.hidden = loaded;
    panes.root.hidden = !opened;
    back.hidden = views.root.hidden = listing;
    // 로직을 골라야 뜻 있는 단추 = 목록에선 숨김(요구 693 · [신규 로직]만 보임)
    copyButton.hidden = deleteButton.hidden = discardButton.hidden = saveButton.hidden = listing;
    if (!opened) return;
    if (!opened.row) {
      editor.replaceChildren(createEmpty({ text: `● ${tx("List_Deleted")}`, small: true }));
      return;
    }
    const current = opened;
    buildLabDetail(editor, {
      row: current.row as LogicRow,
      file: current.file,
      reasons: current.reasons,
      prices: current.prices,
      lines: current.lines,
      text: current.text,
      lastText: current.lastText,
      values: current.values,
      ownHost: current.ownHost,
      onChange: touch,
      onInput: (name, v) => syncLeft(current, { [name]: v }),
      onTrial: drawCalc,
      rerun: () => void drive.run(),
      admin,
      stack: stack.root,
    });
    stack.draw(current.origKey ?? "");
  };

  /** 단가산출 상세 옵션 입력 → 시험 입력(이름이 있는 칸만) · 바뀌면 다시 셈 */
  const syncLeft = (o: Opened, ex: Record<string, string>): void => {
    const names = new Set((calcRow(o.row)?.입력 ?? []).map((x) => x.이름));
    const changed = Object.entries(ex).filter(([k, v]) => names.has(k) && o.values[k] !== v);
    if (!changed.length) return;
    for (const [k, v] of changed) o.values[k] = v;
    void drive.run();
  };

  const show = (next: Opened | null): void => {
    opened = next;
    panes.showSource(next?.row?.출처 ?? "");
    errors.hidden = true;
    drawEditor();
    drawCalc();
  };

  const open = async (id: string, sub: string, key: string): Promise<void> => {
    const draft = drafts[id];
    if (draft?.origKey === null) {
      show({
        ...draft,
        id,
        original: null,
        prices: {},
        reasons: [],
        lines: null,
        text: null,
        ownHost: ownHost(),
        values: {},
      });
      return;
    }
    try {
      const one = await fetchLogic(key);
      show({
        id,
        sub,
        file: draft?.file ?? one.file,
        version: draft?.version ?? one.version,
        origKey: key,
        row: draft ? (draft.row === null ? null : clone(draft.row)) : clone(one.logic),
        original: JSON.stringify(one.logic),
        prices: one.prices,
        reasons: one.reasons,
        lines: null,
        text: null,
        ownHost: ownHost(),
        values: {},
      });
    } catch (error) {
      showToast(error instanceof Error ? error.message : tx("Load_Failed"), "error");
    }
  };

  let allLogics: LogicSummary[] = [];
  let saving = false; // [저장] 뒤 목록 다시 읽는 중 — 거름 되살림이 연 로직을 떠나지 않게(저장 뒤 다시 엶)

  const reload = async (): Promise<void> => {
    const [logics, subs] = await Promise.all([fetchLogics(), fetchLogicSubs()]);
    allLogics = logics;
    list.setItems(logics);
    // 왼쪽 「전체」 + 구분 → 상세구분 거름 — 고르면 목록으로 돌아와 그 범위만
    filterHost.replaceChildren(
      side.filter({
        id: "로직|",
        store: "m01.filter.로직시험",
        subs,
        total: list.total(),
        subLabel: L("M01_LaborSub"),
        detailLabel: L("M01_LaborDetail"),
        restore: true,
        onPick: (sub, detail) => {
          list.setPick(sub, detail);
          if (opened && !saving) void leave().then((ok) => ok && show(null));
        },
      }),
    );
    persist();
  };

  /** 목록 「별칭」 칸 고침(208-1) — 그 줄의 별칭만 바꿔 캐시에 · [저장] 때 다른 고침과 함께 나감 */
  const onAlias = async (item: ListItem, alias: string): Promise<void> => {
    const draft = drafts[item.id];
    if (draft && !draft.row) return; // 지운 줄
    try {
      const one = draft?.origKey === null ? null : await fetchLogic(item.key);
      const row = clone((draft?.row ?? one?.logic) as LogicRow);
      if (alias) row.별칭 = alias;
      else delete row.별칭;
      if (one && JSON.stringify(row) === JSON.stringify(one.logic)) delete drafts[item.id];
      else
        drafts[item.id] = draft
          ? { ...draft, row }
          : { sub: item.sub, file: one!.file, version: one!.version, origKey: item.key, row };
      persist();
    } catch (error) {
      showToast(error instanceof Error ? error.message : tx("Load_Failed"), "error");
    }
  };

  /** 부르는 곳 까닭 띠 */
  const usedBy = (used: string[]): void => {
    errors.replaceChildren(
      el("strong", { text: tx("Delete_Used") }),
      ...used.map((x) => el("div", { text: x })),
    );
    errors.hidden = false;
  };

  const onDelete = async (): Promise<void> => {
    if (!opened?.row) return;
    if (opened.origKey) {
      const used = (await fetchLogicUsers(opened.origKey).catch(() => null))?.쓰는곳 ?? [];
      if (used.length) return usedBy(used); // 확인 창 전에 막음
    }
    if (
      !(await showConfirmDialog(
        tx("Confirm_Delete", { v: opened.row.원문번호 || opened.row.키 }),
        tx("Bar_Delete"),
      ))
    )
      return;
    const was = opened;
    if (was.origKey === null) {
      delete drafts[was.id];
      persist();
      show(null);
      return;
    }
    const key = was.origKey;
    showLoadingOverlay();
    try {
      const one = await fetchLogic(key); // 지금 판(캐시에 옛 판이 남았어도)
      const done = await saveRevised((ok) => removeLogic(key, one.file, one.version, ok));
      if (!done) return; // 개정 확인 취소
      delete drafts[was.id];
      await stack.discard(); // 그 로직 수식 캐시도 비움
      await reload();
      show(null); // 로직 목록
      showToast(tx("Delete_Done", { v: was.row?.원문번호 || key }), "success");
    } catch (error) {
      const used =
        error instanceof ApiError ? (error.detail as { 쓰는곳?: string[] })?.쓰는곳 : null;
      if (used?.length) usedBy(used);
      else failed(error);
    } finally {
      hideLoadingOverlay();
    }
  };

  const onDiscard = async (): Promise<void> => {
    if (!(await showConfirmDialog(tx("Confirm_Discard"), tx("Bar_Discard")))) return;
    drafts = {};
    await stack.discard();
    persist();
    const was = opened;
    if (was && was.origKey !== null)
      await open(logicId(was.sub, was.origKey), was.sub, was.origKey);
    else show(null);
  };

  const onSave = async (): Promise<void> => {
    const byFile = new Map<string, SaveFile>();
    for (const d of Object.values(drafts)) {
      const part = byFile.get(d.file) ?? { file: d.file, version: d.version, changes: [] };
      if (d.origKey === null) {
        if (d.row) part.changes.push({ op: "add", row: d.row });
      } else if (d.row === null) part.changes.push({ op: "delete", key: d.origKey });
      else part.changes.push({ op: "edit", key: d.origKey, row: d.row });
      byFile.set(d.file, part);
    }
    if (!byFile.size) {
      // 수식만 고침 — 줄 쌓기 정본 저장
      if (!stack.dirty()) return void showToast(tx("Save_Nothing"), "info");
      if (await stack.save()) showToast(tx("Save_Done"), "success");
      persist();
      return;
    }
    showLoadingOverlay();
    try {
      // 키 없는 새 줄은 서버가 새 키를 줌(added) — 저장 뒤 그 로직을 엶
      const saved = await saveRevised((ok) => saveFiles([...byFile.values()], ok));
      if (!saved) return; // 개정 확인 취소 = 캐시 그대로
      const was = opened;
      drafts = {};
      saving = true;
      await reload().finally(() => (saving = false));
      showToast(tx("Save_Done"), "success");
      const newKey = was?.row && !was.row.키 ? saved.added?.at(-1)?.key : undefined;
      const made = newKey ? allLogics.find((x) => x.키 === newKey) : undefined;
      if (made) await open(logicId(made.구분, made.키), made.구분, made.키);
      else if (was?.row?.키) await open(logicId(was.sub, was.row.키), was.sub, was.row.키);
      else show(null);
      if (opened) await stack.save(); // 수식 고침도 같은 [저장]에(여는 중이면 다 읽고 · 새 로직 = 새 키로 이어 받은 뒤 · 고침 없으면 그냥)
      persist();
    } catch (error) {
      failed(error);
    } finally {
      hideLoadingOverlay();
    }
  };

  const failed = (error: unknown): void => {
    const detail =
      error instanceof ApiError ? (error.detail as { stale?: string[]; errors?: string[] }) : null;
    if (error instanceof ApiError && error.status === 409) {
      showToast(tx("Save_Stale", { v: (detail?.stale ?? []).join(", ") }), "error");
    } else if (error instanceof ApiError && error.status === 422) {
      errors.replaceChildren(
        el("strong", { text: tx("Save_Errors") }),
        ...(detail?.errors ?? []).map((x) => el("div", { text: x })),
      );
      errors.hidden = false;
    } else {
      showToast(error instanceof Error ? error.message : tx("Save_Failed"), "error");
    }
  };

  const onNew = async (): Promise<void> => {
    const units = [...new Set(allLogics.map((x) => x.결과단위).filter(Boolean))];
    const info = await askBasicInfo(units.length ? units : ["원"]);
    if (!info) return;
    try {
      const own = (await fetchLogicFiles()).find((f) => f.file === OWN_FILE);
      const row: LogicRow = {
        키: "",
        ...info,
        입력: [],
        중간: [],
        호표: [], // 빈 시트 줄 — 자체 로직 편집기 · 시트로 채움
        끝수: null,
      };
      const id = logicId("자체", `새${Date.now()}`);
      drafts[id] = { sub: "자체", file: OWN_FILE, version: own?.version ?? "", origKey: null, row };
      persist();
      await open(id, "자체", "");
    } catch (error) {
      showToast(error instanceof Error ? error.message : tx("Load_Failed"), "error");
    }
  };

  const saveButton = createButton({
    label: tx("Bar_Save"),
    iconStart: "check",
    onClick: () => void onSave(),
  });
  const discardButton = createButton({
    label: tx("Bar_Discard"),
    variant: "ghost",
    iconStart: "undo",
    onClick: () => void onDiscard(),
  });
  const copyButton = createButton({
    label: tl("Copy_Open"),
    variant: "ghost",
    iconStart: "copy",
    onClick: () =>
      opened?.origKey
        ? void openCopyScreen({
            key: opened.origKey,
            afterSave: async (newKey) => {
              await reload();
              await open(logicId("자체", newKey), "자체", newKey);
            },
          })
        : showToast(tl("Copy_NeedOpen"), "info"),
  });
  const deleteButton = createButton({
    label: tx("Bar_Delete"),
    variant: "danger",
    iconStart: "trash",
    onClick: () => void onDelete(),
  });
  // 제목 줄 = 요소 화면(인력 · 재료 …)과 같은 공용 조각
  const bar = buildHeadBar({
    lead: [back],
    title: tx("Title"),
    status: [pending],
    buttons: [
      views.root,
      createButton({
        label: tl("New"),
        variant: "filled",
        iconStart: "plus",
        onClick: () => void onNew(),
      }),
      copyButton,
      deleteButton,
      discardButton,
      saveButton,
    ],
  }).root;
  host.replaceChildren(
    el("div", {
      className: "m01-logic",
      children: [
        el("main", {
          className: "m01-logic__main",
          children: [bar, errors, waiting, list.root, panes.root],
        }),
      ],
    }),
  );
  side.logicHost.replaceChildren(filterHost);
  show(null);
  showLoadingOverlay();
  const openKeyOn = async (key: string): Promise<void> => {
    if (!(await leave())) return;
    const found = allLogics.find((x) => x.키 === key);
    if (found) await open(logicId(found.구분, found.키), found.구분, found.키);
    else showToast(tx("Load_Failed"), "error");
  };

  try {
    await reload();
    loaded = true;
    drawEditor();
    if (openKey) await openKeyOn(openKey);
  } catch (error) {
    showToast(error instanceof Error ? error.message : tx("Load_Failed"), "error");
  } finally {
    hideLoadingOverlay();
  }
  setLogicOpener((key) => void openKeyOn(key));
  return { openKey: openKeyOn };
}