/* =============================================================================
 * M02_MasterTemplete_Labor_Edit.ts
 * 일위대가 라이브러리 오른쪽 — 조합 목록(찾기) / 상세(이름 · 구분 · 상세구분 · 단위 · 비고 + 담은 로직 표
 * (차례 · 키 · 이름 · 결과 단위 · 메모 · 순서) + 미리 보기). 옛 M01 조합 화면을 옮겨 씀(PLAN 27-2b).
 * 저장 · 지우기 = 고른 층 조합 표(마스터 UA · 회사 UC · 개인 UP · `Labor_Api`) · 읽기만 층은 단추 없음.
 * ========================================================================== */

import {
  createButton,
  createInputField,
  el,
  showConfirmDialog,
  showToast,
} from "@ui/ui_template_elements";
import { ApiError, type LogicSummary } from "../M01_MasterData/M01_MasterData_UI_Logic_Api";
import {
  deleteCombo,
  editCombo,
  fetchCombo,
  fetchLibLogics,
  newCombo,
  type Combo,
  type ComboSummary,
  type LaborScope,
} from "./M02_MasterTemplete_Labor_Api";
import { openLogicPicker } from "./M02_MasterTemplete_Labor_Pick";
import { buildPreview } from "./M02_MasterTemplete_Labor_Preview";
import { tc } from "./M02_MasterTemplete_Labor_Text";
import "../M01_MasterData/M01_MasterData_UI_Logic_Style.css";
import "../M01_MasterData/M01_MasterData_UI_LogicLab_Style.css";
import "./M02_MasterTemplete_Labor.css";

const blankCombo = (path: string[] = []): Combo => ({
  키: "",
  이름: "",
  구분: path[0] ?? null,
  상세구분: path[1] ?? null,
  단위: null,
  담은로직: [],
  출처: "자체",
  소유: "현장",
  본뜬키: null,
  비고: null,
});

/** 서버가 준 까닭 — 422 는 검사 글 목록 · 409 는 낡은 판본 · 쓰는 곳 */
export function reason(error: unknown): string {
  if (error instanceof ApiError && typeof error.detail === "object" && error.detail) {
    const d = error.detail as { errors?: string[]; stale?: string[] };
    // 서버 검사 글 머리(「파일.json · 키 」)는 떼고 보임 — 새로 만들 때 키는 아직 없는 번호라 헷갈림
    if (d.errors)
      return d.errors
        .map((x) => x.replace(/^(\S+\.json · )?(U[AM]\d{6} |U[CP]\d+-\d{6} )?/, ""))
        .join(" / ");
    if (d.stale) return tc("Stale");
  }
  return error instanceof Error ? error.message : tc("Load_Failed");
}

export interface LaborEditOptions {
  scope: LaborScope;
  canEdit: boolean;
  /** 저장 · 지움 뒤 — 나무 · 목록을 다시 받고 그 조합(`key`)을 고름 */
  onSaved: (key: string | null) => Promise<void>;
  /** 저장 안 한 고침이 있나 — 페이지가 떠날 때 물음 */
  onDirty: (dirty: boolean) => void;
}

export interface LaborEditor {
  root: HTMLElement;
  /** 나무가 받은 목록 — 상세가 안 열려 있으면 목록을 다시 그림 */
  setList: (items: ComboSummary[]) => void;
  open: (key: string) => Promise<void>;
  /** 나무 「조합 더하기」 — 그 폴더(구분 · 상세구분)를 채운 빈 조합 */
  startNew: (path: string[]) => void;
  showList: () => void;
  isDirty: () => boolean;
  /** 열린 조합 키 — 목록이면 null · 새 조합이면 빈 글 */
  current: () => string | null;
}

export function createLaborEditor(opt: LaborEditOptions): LaborEditor {
  const edit = opt.canEdit;
  let items: ComboSummary[] = [];
  let logics = new Map<string, LogicSummary>();
  /** 화면을 바꾼 횟수 — 늦게 온 답은 이 값이 달라졌으면 버림 */
  let nav = 0;
  /** `saved` = 연 때의 모양 — 「저장 안 한 고침」 판정 */
  let current: { combo: Combo; version: string; saved: string } | null = null;
  let q = "";
  const view = el("div", { className: "m01-logic__editor m01-combo m02-labor__edit" });
  const find = createInputField({ type: "search", placeholder: tc("Search") });
  find.input.addEventListener("input", () => {
    q = find.input.value.trim().toLowerCase();
    if (!current) drawList();
  });

  const logicsReady = fetchLibLogics()
    .then((all) => {
      logics = new Map(all.map((x) => [x.키, x]));
    })
    .catch((error) =>
      showToast(error instanceof Error ? error.message : tc("Load_Failed"), "error"),
    );

  const dirty = (): boolean => !!current && JSON.stringify(current.combo) !== current.saved;
  const markDirty = (): void => opt.onDirty(dirty());

  /* --- 목록 --- */
  const drawList = (): void => {
    nav++;
    current = null;
    opt.onDirty(false);
    const shown = items.filter((x) => !q || `${x.키} ${x.이름}`.toLowerCase().includes(q));
    const heads = [
      tc("Head_Key"),
      tc("Head_Name"),
      tc("Sub"),
      tc("Detail"),
      tc("Head_Unit"),
      tc("Head_Count"),
      tc("Head_Origin"),
    ];
    const rows = shown.map((x) => {
      const tr = el("tr", {
        className: "m01-master__table-row",
        attrs: { "data-combo-key": x.키 },
        children: [
          x.키,
          x.이름,
          x.구분 ?? "",
          x.상세구분 ?? "",
          x.단위 ?? "",
          String(x.count),
          x.본뜬키 ?? tc("Origin_Self"),
        ].map((v) => el("td", { text: v, attrs: { title: v } })),
      });
      tr.addEventListener("click", () => void open(x.키));
      return tr;
    });
    view.replaceChildren(
      el("div", {
        className: "m01-logic__section-head",
        children: [
          find.root,
          ...(edit
            ? [createButton({ label: tc("New"), variant: "filled", onClick: () => startNew([]) })]
            : [el("span", { className: "m01-logic__muted", text: tc("ReadOnly") })]),
        ],
      }),
      shown.length
        ? el("div", {
            className: "m01-master__grid-wrap",
            children: [
              el("table", {
                className: "m01-master__grid",
                children: [
                  el("thead", {
                    children: [el("tr", { children: heads.map((t) => el("th", { text: t })) })],
                  }),
                  el("tbody", { children: rows }),
                ],
              }),
            ],
          })
        : el("p", { className: "m01-logic__muted", text: tc(items.length ? "NoMatch" : "Empty") }),
    );
  };

  const open = async (key: string): Promise<void> => {
    try {
      const my = ++nav;
      const one = await fetchCombo(key);
      await logicsReady;
      if (my !== nav) return;
      draw(one.combo, one.version);
    } catch (error) {
      showToast(error instanceof Error ? error.message : tc("Load_Failed"), "error");
    }
  };

  const startNew = (path: string[]): void => draw(blankCombo(path), "");

  /* --- 상세 --- */
  const draw = (combo: Combo, version: string, saved = JSON.stringify(combo)): void => {
    nav++;
    current = { combo, version, saved };
    opt.onDirty(dirty());
    const field = (label: string, name: "이름" | "구분" | "상세구분" | "단위" | "비고") => {
      const f = createInputField({ type: "text", label });
      f.input.value = combo[name] ?? "";
      f.input.readOnly = !edit;
      f.input.setAttribute("data-combo-field", name);
      if (name === "이름") f.input.maxLength = 60; // 서버 한도(`MAX_이름`)와 같음
      f.input.addEventListener("input", () => {
        const v = f.input.value;
        if (name === "이름") combo.이름 = v;
        else combo[name] = v || null;
        markDirty();
      });
      return f.root;
    };
    const preview = buildPreview(() => combo);
    const table = el("div", { className: "m01-master__grid-wrap" });
    const drawTable = (): void => {
      const move = (i: number, d: number): void => {
        const j = i + d;
        if (j < 0 || j >= combo.담은로직.length) return;
        [combo.담은로직[i], combo.담은로직[j]] = [combo.담은로직[j], combo.담은로직[i]];
        drawTable();
        markDirty();
      };
      const trs = combo.담은로직.map((row, i) => {
        const info = logics.get(row.로직);
        const memo = createInputField({ type: "text" });
        memo.input.value = row.메모 ?? "";
        memo.input.readOnly = !edit;
        memo.input.addEventListener("input", () => {
          row.메모 = memo.input.value || null;
          markDirty();
        });
        const small = (label: string, run: () => void): HTMLElement =>
          createButton({ label, variant: "ghost", size: "sm", onClick: run });
        const btns = el("div", {
          className: "m01-logic__chips",
          children: edit
            ? [
                small(tc("Up"), () => move(i, -1)),
                small(tc("Down"), () => move(i, 1)),
                small(tc("Remove"), () => {
                  combo.담은로직.splice(i, 1);
                  drawTable();
                  markDirty();
                }),
              ]
            : [],
        });
        return el("tr", {
          attrs: { "data-combo-logic": row.로직 },
          children: [
            el("td", { text: String(i + 1) }),
            el("td", { text: row.로직 }),
            el("td", { text: info?.이름 ?? row.로직 }),
            el("td", { text: info?.결과단위 ?? "" }),
            el("td", { children: [memo.root] }),
            el("td", { children: [btns] }),
          ],
        });
      });
      const heads = [
        tc("Col_Order"),
        tc("Col_Key"),
        tc("Col_Name"),
        tc("Col_Unit"),
        tc("Col_Memo"),
        tc("Col_Move"),
      ];
      table.replaceChildren(
        el("table", {
          className: "m01-master__grid",
          children: [
            el("thead", {
              children: [el("tr", { children: heads.map((t) => el("th", { text: t })) })],
            }),
            el("tbody", { children: trs }),
          ],
        }),
        ...(trs.length ? [] : [el("p", { className: "m01-logic__muted", text: tc("NoLogic") })]),
      );
      void preview.redraw();
    };

    const add = createButton({
      label: tc("AddLogic"),
      variant: "filled",
      onClick: () =>
        openLogicPicker((x) => {
          if (!logics.has(x.키)) logics.set(x.키, x);
          combo.담은로직.push({ 로직: x.키, 메모: null });
          drawTable();
          markDirty();
        }),
    });
    const save = createButton({
      label: tc("Save"),
      variant: "filled",
      onClick: async () => {
        if (!combo.이름.trim()) return showToast(tc("NeedName"), "error");
        save.disabled = true; // 연달아 눌러도 한 번만
        try {
          let key = combo.키;
          if (key) await editCombo(key, version, combo, opt.scope);
          else key = (await newCombo(combo, opt.scope)).key;
          showToast(tc("Saved"), "success");
          current = null; // 저장함 — 다시 여는 동안 「고침 있음」 으로 안 물음
          opt.onDirty(false);
          await opt.onSaved(key);
          await open(key);
        } catch (error) {
          showToast(reason(error), "error");
        } finally {
          save.disabled = false;
        }
      },
    });
    const remove = createButton({
      label: tc("Delete"),
      variant: "ghost",
      onClick: async () => {
        if (
          !combo.키 ||
          !(await showConfirmDialog(`${combo.키} ${combo.이름} — ${tc("DeleteAsk")}`))
        )
          return;
        try {
          await deleteCombo(combo.키, version, opt.scope);
          showToast(tc("Deleted"), "success");
          current = null;
          await opt.onSaved(null);
          drawList();
        } catch (error) {
          showToast(reason(error), "error");
        }
      },
    });
    const back = createButton({
      label: "←",
      variant: "ghost",
      onClick: async () => {
        if (dirty() && !(await showConfirmDialog(tc("BackAsk")))) return;
        drawList();
      },
    });
    const origin = createInputField({ type: "text", label: tc("Head_Origin") });
    origin.input.value = combo.본뜬키 ?? tc("Origin_Self");
    origin.input.readOnly = true;
    origin.input.setAttribute("data-combo-origin", combo.본뜬키 ?? "");
    view.replaceChildren(
      el("div", {
        className: "m01-logic__section-head",
        children: [
          back,
          el("h3", { text: combo.키 || tc("New") }),
          ...(edit ? [remove, save] : []),
        ],
      }),
      el("section", {
        className: "m01lab__box m01-logic__section",
        children: [
          el("div", {
            className: "m01lab__info",
            children: [
              field(tc("Head_Name"), "이름"),
              field(tc("Sub"), "구분"),
              field(tc("Detail"), "상세구분"),
              field(tc("Head_Unit"), "단위"),
              field(tc("Head_Note"), "비고"),
              origin.root,
            ],
          }),
        ],
      }),
      el("section", {
        className: "m01lab__box m01-logic__section",
        children: [
          el("div", {
            className: "m01-logic__section-head",
            children: [el("h3", { text: tc("Logics_Title") }), ...(edit ? [add] : [])],
          }),
          table,
        ],
      }),
      preview.root,
    );
    drawTable();
  };

  view.replaceChildren(el("p", { className: "m01-logic__muted", text: tc("Loading") }));
  return {
    root: view,
    setList: (next) => {
      items = next;
      if (!current) drawList();
    },
    open,
    startNew,
    showList: drawList,
    isDirty: dirty,
    current: () => current?.combo.키 ?? null,
  };
}