/* =============================================================================
 * M02_MasterTemplete_Library_List.ts
 * 일위대가 조합 서고 목록표(51-4) — 좌측 항목(단가산출 승격 · 일위대가 사전조합)을 누르면 상세 칸에 뜸.
 * 표 = 고름 · 키 · 구분 · 상세구분(51-12) · 이름 · 단위 · 기준 금액(서버 1 단위 계) · 고친 날 · 줄 누름 = 그 문서 상세.
 * 머리 [생성] · [복사](고른 줄) · [삭제](고른 줄 · 쓰는 곳 있으면 서버 409 까닭 그대로).
 * 꼴 = M01 단가산출 로직 목록 — 찾기 줄(`buildHeadFilters`) · 쪽(`buildPager`) · 표(`m01-master__grid`) 를 M01 에서 import.
 * ========================================================================== */

import {
  createButton,
  createInputField,
  el,
  showConfirmDialog,
  showToast,
} from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import { openModal } from "@ui/ui_template_modal";
import { buildPager } from "../M01_MasterData/M01_MasterData_UI_Cells";
import { buildHeadFilters } from "../M01_MasterData/M01_MasterData_UI_Head";
import "../M01_MasterData/M01_MasterData_UI_Style.css";
import {
  deleteLayerTemplate,
  deleteTemplate,
  getActiveOwner,
  listTemplates,
  newLibrary,
  readTemplate,
  saveTemplate,
  type Layer,
  type LibraryBody,
  type TemplateInfo,
} from "./M02_MasterTemplete_Api_Fetch";
import { fetchLibLogicSubs } from "./M02_MasterTemplete_Labor_Api";
import { openLogicPicker } from "./M02_MasterTemplete_Labor_Pick";
import { tc } from "./M02_MasterTemplete_Labor_Text";
import type { PrecomboKind } from "./M02_MasterTemplete_UI_Side_Precombo";

/** 목록 줄 — 서버가 문서 `이름`(제목) · 단위 · 1 단위 기준 계를 실어 보냄 */
type Row = TemplateInfo & {
  제목?: string | null;
  단위?: string | null;
  기준금액?: number | null;
  구분?: string | null;
  상세구분?: string | null;
};

export interface LibraryListOptions {
  layer: Layer;
  kind: PrecomboKind;
  canEdit: boolean;
  /** 줄 누름 · 생성 · 복사 뒤 — 그 문서 상세 */
  open: (key: string, label: string) => void;
}

const SIZE = 30;
const why = (error: unknown): string => (error instanceof Error ? error.message : "");
const money = (v: number | null | undefined): string =>
  v == null ? "" : v.toLocaleString("ko-KR", { maximumFractionDigits: 2 });
export const libraryLabel = (row: Row): string => (row.제목 ? `${row.이름} ${row.제목}` : row.이름);

/** `tools` = 상세 머리 단추 자리(페이지 slot) · 돌려준 `destroy` 는 안 씀(칸째 비움) */
export function mountLibraryList(
  host: HTMLElement,
  tools: HTMLElement,
  opt: LibraryListOptions,
): { getDoc: () => null; destroy: () => void } {
  let rows: Row[] = [];
  let picked: string | null = null;
  let page = 1;
  const searchField = createInputField({ type: "search", placeholder: tc("Search") });
  const body = el("tbody");
  let pager = buildPager(0, SIZE, 1, () => {});
  const btnNew = createButton({ label: tc("Lib_Create"), variant: "filled" });
  const btnCopy = createButton({ label: tc("Lib_Copy"), variant: "ghost" });
  const btnDel = createButton({ label: tc("Lib_Delete"), variant: "danger" });
  const paintButtons = (): void => {
    btnCopy.disabled = btnDel.disabled = !rows.some((r) => r.이름 === picked);
  };

  const draw = (): void => {
    const q = searchField.input.value.trim().toLowerCase();
    const shown = rows.filter((r) => !q || libraryLabel(r).toLowerCase().includes(q));
    page = Math.min(page, Math.max(1, Math.ceil(shown.length / SIZE)));
    const next = buildPager(shown.length, SIZE, page, (p) => {
      page = p;
      draw();
    });
    pager.replaceWith(next);
    pager = next;
    body.replaceChildren(
      ...(shown.length
        ? shown.slice((page - 1) * SIZE, page * SIZE).map((row) => {
            const radio = el("input", {
              attrs: { type: "radio", name: `m02-lib-${opt.kind}`, "aria-label": row.이름 },
            }) as HTMLInputElement;
            radio.checked = row.이름 === picked;
            const pick = el("td", { className: "m02-lib__pick", children: [radio] });
            pick.addEventListener("click", (event) => {
              event.stopPropagation(); // 고름 칸은 열지 않음
              picked = row.이름;
              radio.checked = true;
              paintButtons();
            });
            const tr = el("tr", {
              className: "m01-master__table-row",
              attrs: { "data-lib-key": row.이름 },
              children: [
                pick,
                ...[
                  row.이름,
                  row.구분 ?? "",
                  row.상세구분 ?? "",
                  row.제목 ?? "",
                  row.단위 ?? "",
                  money(row.기준금액),
                  row.수정일,
                ].map((v) => el("td", { text: v, attrs: { title: v } })),
              ],
            });
            tr.addEventListener("click", () => opt.open(row.이름, libraryLabel(row)));
            return tr;
          })
        : [
            el("tr", {
              children: [el("td", { text: L("M02_NoTemplates"), attrs: { colspan: "8" } })],
            }),
          ]),
    );
    paintButtons();
  };

  const load = async (): Promise<void> => {
    try {
      rows = (await listTemplates(opt.layer, null)).filter((r) => r.종류 === opt.kind) as Row[];
    } catch (error) {
      rows = [];
      showToast(L("M02_LoadFailed").replace("{value}", why(error)), "error");
    }
    draw();
  };

  const nameDialog = (title: string, start: string, onOk: (name: string) => Promise<void>) => {
    const name = createInputField({ label: L("M02_Name"), placeholder: L("M02_Name") });
    name.input.value = start;
    openModal({
      title,
      closeLabel: L("M02_Close"),
      dialogClass: "m02-modal",
      mount: (box, close) => {
        const ok = createButton({ label: L("M02_Create"), variant: "filled" });
        ok.addEventListener("click", async () => {
          const text = name.input.value.trim();
          if (!text) return showToast(L("M02_NameNeeded"), "error");
          ok.disabled = true; // 연달아 눌러도 한 번만
          try {
            await onOk(text);
            close();
          } catch (error) {
            showToast(L("M02_ActionFailed").replace("{value}", why(error)), "error");
          } finally {
            ok.disabled = false;
          }
        });
        name.input.addEventListener("keydown", (event) => {
          if (event.key === "Enter" && !event.isComposing) ok.click();
        });
        box.append(name.root, ok);
      },
    });
  };

  /** 새로 — 서버가 그 층 다음 키로 씀 → 그 문서 상세 */
  const made = (key: string, label: string): void => {
    showToast(L("M02_Created"), "success");
    opt.open(key, label);
  };
  const create = async (body: LibraryBody, label: string): Promise<void> =>
    made((await newLibrary(opt.layer, opt.kind, body)).이름, label);

  /** 단가승격 = 단가산출 로직 고르기 → 이름 · 단위 · 구분 · 연결은 로직 것(서버가 채움) ·
   * 사전조합 = 이름 + 구분 · 상세구분 처음 값 = 로직 구분 목록 첫 줄(51-12 · 상세에서 바꿈) · 빈 묶음 */
  btnNew.addEventListener("click", () => {
    if (opt.kind === "promote")
      return openLogicPicker((x) => {
        const doc = {
          이름: x.이름,
          단위: x.결과단위 || null,
          담은로직: [{ 로직: x.키, 입력값: {} }],
        };
        void create({ 문서: doc }, x.이름).catch((error) =>
          showToast(L("M02_ActionFailed").replace("{value}", why(error)), "error"),
        );
      });
    nameDialog(L("M02_NewTitle"), "", async (name) => {
      const first = (await fetchLibLogicSubs())[0];
      const 문서 = {
        이름: name,
        구분: first?.name ?? null,
        상세구분: first?.details[0] ?? null,
        단위: null,
        담은로직: [],
      };
      await create({ 문서 }, name);
    });
  });

  /** 복사 = 같은 층 새 키(서버 · 본뜬 = 원래 키) → 고른 이름으로 고쳐 씀 */
  btnCopy.addEventListener("click", () => {
    const from = rows.find((r) => r.이름 === picked);
    if (!from) return;
    nameDialog(L("M02_CopyTitle"), `${from.제목 ?? from.이름} (2)`, async (name) => {
      const got = await newLibrary(opt.layer, opt.kind, {
        본뜬: { 층: opt.layer, 주인: getActiveOwner(), 키: from.이름 },
      });
      const doc = await readTemplate(opt.layer, opt.kind, got.이름, null);
      await saveTemplate(opt.layer, opt.kind, got.이름, null, got.판, {
        ...(doc.문서 as object),
        이름: name,
      });
      made(got.이름, name);
    });
  });

  btnDel.addEventListener("click", async () => {
    await load(); // 판을 최신으로
    const info = rows.find((r) => r.이름 === picked);
    if (!info) return;
    const label = libraryLabel(info);
    if (!(await showConfirmDialog(L("M02_DeleteConfirm").replace("{value}", label)))) return;
    try {
      if (opt.layer === "system") await deleteTemplate(opt.kind, info.이름, info.판);
      else await deleteLayerTemplate(opt.layer, opt.kind, info.이름, info.판);
      showToast(L("M02_Deleted"), "success");
      picked = null;
      await load();
    } catch (error) {
      // 쓰는 곳이 있으면 서버가 막음 — 까닭(쓰는 곳 이름) 그대로
      showToast(why(error) || L("M02_ActionFailed").replace("{value}", ""), "error");
    }
  });

  searchField.input.addEventListener("input", () => {
    page = 1;
    draw();
  });
  const heads = [
    "",
    "Lib_Key",
    "Sub",
    "Detail",
    "Lib_Name",
    "Lib_Unit",
    "Lib_Base",
    "Lib_Date",
  ] as const;
  host.replaceChildren(
    buildHeadFilters([searchField.root, pager]),
    el("div", {
      className: "m01-master__grid-wrap",
      attrs: { "data-lib-list": opt.kind },
      children: [
        el("table", {
          className: "m01-master__grid",
          children: [
            el("thead", {
              children: [
                el("tr", { children: heads.map((h) => el("th", { text: h ? tc(h) : "" })) }),
              ],
            }),
            body,
          ],
        }),
      ],
    }),
  );
  if (opt.canEdit)
    tools.replaceChildren(
      el("span", { className: "m02-main__tools", children: [btnNew, btnCopy, btnDel] }),
    );
  void load();
  return { getDoc: () => null, destroy: () => undefined };
}