/* =============================================================================
 * M01_MasterData_UI_Combo.ts
 * 일위대가 조합 화면 — 왼쪽 컨테이너(구분 · 상세구분 거름) / 오른쪽 목록 · 상세
 * 상세 = 이름·구분·단위·비고 + 담은 로직 표(차례 · 키 · 이름 · 결과 단위 · 메모 · 순서) + 미리 보기
 * 저장·지우기는 서버 조합 마스터(`일위대가조합.json` · 키 UA) — 길은 `Combo_Api` 한 곳
 * ========================================================================== */

import {
  createButton,
  createInputField,
  el,
  showConfirmDialog,
  showToast,
} from "@ui/ui_template_elements";
import { fetchLogics, type LogicSummary } from "./M01_MasterData_UI_Logic_Api";
import {
  deleteCombo,
  fetchCombo,
  fetchCombos,
  saveCombo,
  type Combo,
  type ComboSummary,
} from "./M01_MasterData_UI_Combo_Api";
import { openLogicPicker } from "./M01_MasterData_UI_Combo_Pick";
import { buildPreview } from "./M01_MasterData_UI_Combo_Preview";
import { tc } from "./M01_MasterData_UI_Combo_Text";
import type { SideHandle } from "./M01_MasterData_UI_Side";
import "./M01_MasterData_UI_Logic_Style.css";
import "./M01_MasterData_UI_LogicLab_Style.css";

const FILTER_ID = "조합|";
const blankCombo = (): Combo => ({
  키: "",
  이름: "",
  구분: "",
  상세구분: "",
  단위: "",
  비고: "",
  로직: [],
});

export interface ComboHandle {
  /** 컨테이너를 펼칠 때 — 목록을 새로 받아 그림 */
  show: () => Promise<void>;
}

export function mountM01Combo(
  host: HTMLElement,
  side: SideHandle,
  onOpenLogic: (key: string) => void,
): ComboHandle {
  let items: ComboSummary[] = [];
  let logics = new Map<string, LogicSummary>();
  let pick = { sub: "", detail: "" };
  const filterHost = el("div");
  side.comboHost.replaceChildren(filterHost);
  const view = el("div", { className: "m01-logic__editor" });
  host.replaceChildren(view);

  const load = async (): Promise<void> => {
    try {
      const [combos, all] = await Promise.all([fetchCombos(), fetchLogics()]);
      items = combos;
      logics = new Map(all.map((x) => [x.키, x]));
    } catch (error) {
      showToast(error instanceof Error ? error.message : tc("Load_Failed"), "error");
    }
    drawFilter();
    drawList();
  };

  /* --- 왼쪽 거름 --- */
  const drawFilter = (): void => {
    const subs = [...new Set(items.map((x) => x.구분).filter(Boolean))].map((name) => ({
      name,
      book: null,
      details: [...new Set(items.filter((x) => x.구분 === name).map((x) => x.상세구분))].filter(
        Boolean,
      ),
    }));
    filterHost.replaceChildren(
      side.filter({
        id: FILTER_ID,
        store: "m01.filter.조합",
        subs,
        total: items.length,
        subLabel: tc("Sub"),
        detailLabel: tc("Detail"),
        onPick: (sub, detail) => {
          pick = { sub, detail };
          drawList();
        },
      }),
    );
  };

  /* --- 목록 --- */
  const toolbar = (...more: HTMLElement[]): HTMLElement =>
    el("div", {
      className: "m01-logic__section-head",
      children: [
        createButton({ label: tc("New"), variant: "filled", onClick: () => draw(blankCombo()) }),
        ...more,
      ],
    });

  const drawList = (): void => {
    const shown = items.filter(
      (x) => (!pick.sub || x.구분 === pick.sub) && (!pick.detail || x.상세구분 === pick.detail),
    );
    const heads = [
      tc("Head_Key"),
      tc("Head_Name"),
      tc("Sub"),
      tc("Detail"),
      tc("Head_Unit"),
      tc("Head_Count"),
    ];
    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.로직수)].map((v) =>
          el("td", { text: v }),
        ),
      });
      tr.addEventListener("click", () => void open(x.키));
      return tr;
    });
    view.replaceChildren(
      toolbar(),
      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("Empty") }),
    );
  };

  const open = async (key: string): Promise<void> => {
    try {
      draw(await fetchCombo(key));
    } catch (error) {
      showToast(error instanceof Error ? error.message : tc("Load_Failed"), "error");
    }
  };

  /* --- 상세 --- */
  const draw = (combo: Combo): void => {
    const field = (label: string, name: "이름" | "구분" | "상세구분" | "단위" | "비고") => {
      const f = createInputField({ type: "text", label });
      f.input.value = combo[name];
      f.input.setAttribute("data-combo-field", name);
      f.input.addEventListener("input", () => (combo[name] = f.input.value));
      return f.root;
    };
    const preview = buildPreview(() => combo.로직);
    const table = el("div");
    const drawTable = (): void => {
      const move = (i: number, d: number): void => {
        const j = i + d;
        if (j < 0 || j >= combo.로직.length) return;
        [combo.로직[i], combo.로직[j]] = [combo.로직[j], combo.로직[i]];
        drawTable();
      };
      const trs = combo.로직.map((row, i) => {
        const info = logics.get(row.키);
        const memo = createInputField({ type: "text" });
        memo.input.value = row.메모;
        memo.input.addEventListener("input", () => (row.메모 = memo.input.value));
        const name = el("button", {
          className: "ui-btn ui-btn--ghost",
          text: info?.이름 ?? row.키,
          attrs: { type: "button", title: tc("Open") },
        });
        name.addEventListener("click", () => onOpenLogic(row.키));
        const btns = el("div", {
          className: "m01-logic__chips",
          children: [
            createButton({ label: tc("Up"), variant: "ghost", onClick: () => move(i, -1) }),
            createButton({ label: tc("Down"), variant: "ghost", onClick: () => move(i, 1) }),
            createButton({
              label: tc("Remove"),
              variant: "ghost",
              onClick: () => {
                combo.로직.splice(i, 1);
                drawTable();
              },
            }),
          ],
        });
        return el("tr", {
          attrs: { "data-combo-logic": row.키 },
          children: [
            el("td", { text: String(i + 1) }),
            el("td", { text: row.키 }),
            el("td", { children: [name] }),
            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.로직.push({ 키: x.키, 메모: "", 입력: {} });
          drawTable();
        }),
    });
    const save = createButton({
      label: tc("Save"),
      variant: "filled",
      onClick: async () => {
        if (!combo.이름.trim()) return showToast(tc("NeedName"), "error");
        try {
          const saved = await saveCombo(combo);
          showToast(tc("Saved"), "success");
          await load();
          draw(saved);
        } catch (error) {
          showToast(error instanceof Error ? error.message : tc("Load_Failed"), "error");
        }
      },
    });
    const remove = createButton({
      label: tc("Delete"),
      variant: "ghost",
      onClick: async () => {
        if (!combo.키 || !(await showConfirmDialog(tc("DeleteAsk")))) return;
        try {
          await deleteCombo(combo.키);
          showToast(tc("Deleted"), "success");
          await load();
        } catch (error) {
          showToast(error instanceof Error ? error.message : tc("Load_Failed"), "error");
        }
      },
    });
    const back = createButton({ label: "←", variant: "ghost", onClick: () => drawList() });
    view.replaceChildren(
      el("div", {
        className: "m01-logic__section-head",
        children: [back, el("h3", { text: combo.키 || tc("New") }), 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"),
            ],
          }),
        ],
      }),
      el("section", {
        className: "m01lab__box m01-logic__section",
        children: [
          el("div", {
            className: "m01-logic__section-head",
            children: [el("h3", { text: tc("Logics_Title") }), add],
          }),
          table,
        ],
      }),
      preview.root,
    );
    drawTable();
  };

  return { show: load };
}