/* =============================================================================
 * spreadsheet_data_menu.ts  (주인 D)
 * 데이터 단추 · 메뉴 잇기 — 수식 입력줄 앞 [↑] [↓] [필터] [데이터 ▾].
 *   정렬 · 자동 필터(sub3 `spreadsheet_sort_dialog` · `spreadsheet_filter`) ·
 *   조건부 서식 · 데이터 유효성 · 이름 관리 · 시트 숨김/탭 색(sub4 패널 — 부품 오른위 창에 띄움) · 눈금선 ·
 *   수식 분석(sub3 — 선행 · 종속 추적 화살표 · 화살표 지우기 · 수식 계산 · 오류 ⚠ 풍선) · 자동 합계(Σ · Alt+=).
 * 유효성 목록 칸은 고르면 칸 옆 ▼ · Alt+↓ 로 값 목록(필터 머리 칸이면 필터 목록이 먼저).
 * ========================================================================== */

import "./spreadsheet_stage3.css"; // sub4 패널 스타일(잇는 쪽이 붙임)
import { createMapContextMenu, type MapContextMenuItem } from "@ui/ui_template_context_menu";
import { el, showToast } from "@ui/ui_template_elements";
import { parseRange, rangeToA1, toA1 } from "./spreadsheet_address";
import { autoSumRange } from "./spreadsheet_autosum";
import { createCondFmtPanel } from "./spreadsheet_condfmt";
import { attachErrorTip } from "./spreadsheet_errcheck";
import { openEvalSteps } from "./spreadsheet_eval_steps";
import { attachFilter, toggleFilter } from "./spreadsheet_filter";
import { createNameManagerPanel } from "./spreadsheet_names";
import { createSheetExtraPanel } from "./spreadsheet_sheet_extra";
import { openSortDialog, sortSelection } from "./spreadsheet_sort_dialog";
import { attachTrace } from "./spreadsheet_trace";
import {
  createValidationDropdown,
  createValidationPanel,
  findValidation,
} from "./spreadsheet_validation";
import type { KeyHooks } from "./spreadsheet_keys";
import type { PartHandle, SpreadsheetContext } from "./spreadsheet_view_types";

const TEXT = {
  asc: "오름차순 정렬(활성 칸 열 기준)",
  desc: "내림차순 정렬(활성 칸 열 기준)",
  filter: "자동 필터 켜기 · 끄기(Ctrl+Shift+L · 머리 칸에서 Alt+↓ 값 목록)",
  menu: "데이터 ▾",
  sort: "정렬…",
  filterItem: "자동 필터 켜기 · 끄기",
  condfmt: "조건부 서식…",
  validation: "데이터 유효성…",
  names: "이름 관리…",
  grid: "눈금선 보이기 · 숨기기",
  close: "닫기",
  list: "값 목록(Alt+↓)",
  sheets: "시트 숨기기 · 탭 색…",
  audit: "수식 분석",
  prec: "선행 참조 추적",
  dep: "종속 참조 추적",
  clear: "화살표 지우기",
  steps: "수식 계산…",
  noMore: "더 추적할 칸 없음",
  sum: "자동 합계(Alt+=)",
};

export interface DataMenu {
  /** 수식 입력줄 앞에 둘 단추들 */
  buttons: HTMLElement[];
  keys: Pick<KeyHooks, "filter" | "dropdown" | "autosum">;
  part: PartHandle;
}

export function mountDataMenu(ctx: SpreadsheetContext, back: () => void): DataMenu {
  const filter = attachFilter(ctx);
  const trace = attachTrace(ctx);
  const tip = attachErrorTip(ctx, trace);
  let closeSteps: (() => void) | null = null;
  const traced = (more: boolean): void => {
    if (!more) showToast(TEXT.noMore, "info");
    back();
  };
  const menu = createMapContextMenu("ss");
  ctx.root.append(menu.element);
  let closeSort: (() => void) | null = null;

  const button = (text: string, title: string, run: (b: HTMLElement) => void, keep = false) => {
    const b = el("button", { className: "ss-brush", text, attrs: { type: "button", title } });
    b.addEventListener("click", () => {
      run(b);
      if (!keep) back();
    });
    return b;
  };

  // ── 패널 창(조건부 서식 · 유효성 · 이름) — 한 번에 하나 ─────────────────────
  const title = el("span", { className: "ss-dialog__title" });
  const body = el("div", { className: "ss-dialog__body" });
  const shut = el("button", {
    className: "ss-find__btn",
    text: "×",
    attrs: { type: "button", title: TEXT.close },
  });
  const dialog = el("div", {
    className: "ss-dialog",
    attrs: { hidden: "" },
    children: [el("div", { className: "ss-dialog__head", children: [title, shut] }), body],
  });
  ctx.root.append(dialog);
  let panel: PartHandle | null = null;
  const closePanel = (): void => {
    panel?.destroy();
    panel = null;
    body.replaceChildren();
    dialog.setAttribute("hidden", "");
  };
  shut.addEventListener("click", () => (closePanel(), back()));
  dialog.addEventListener("keydown", (e) => {
    if (e.key !== "Escape") return;
    e.stopPropagation();
    closePanel();
    back();
  });
  function openPanel(name: string, make: (c: SpreadsheetContext) => PartHandle): void {
    closePanel();
    panel = make(ctx);
    title.textContent = name.replace("…", "");
    if (panel.root) body.append(panel.root);
    dialog.removeAttribute("hidden");
  }

  function openMenu(anchor: HTMLElement): void {
    const r = anchor.getBoundingClientRect();
    const items: MapContextMenuItem[] = [
      [TEXT.sort, () => ((closeSort = openSortDialog(ctx)), undefined)],
      [TEXT.filterItem, () => (toggleFilter(ctx), back())],
      [TEXT.condfmt, () => openPanel(TEXT.condfmt, createCondFmtPanel)],
      [TEXT.validation, () => openPanel(TEXT.validation, createValidationPanel)],
      [TEXT.names, () => openPanel(TEXT.names, createNameManagerPanel)],
      [TEXT.sheets, () => openPanel(TEXT.sheets, createSheetExtraPanel)],
      [TEXT.grid, () => (toggleGridlines(), back())],
      {
        label: TEXT.audit,
        children: [
          [TEXT.prec, () => traced(trace.precedents())],
          [TEXT.dep, () => traced(trace.dependents())],
          [TEXT.clear, () => (trace.clear(), back())],
          [TEXT.steps, () => (closeSteps?.(), (closeSteps = openEvalSteps(ctx)))],
        ],
      },
    ];
    if (!ctx.readOnly) menu.open(r.left, r.bottom, items);
  }

  function toggleGridlines(): void {
    const s = ctx.sheet();
    ctx.dispatch({ 종류: "눈금선", 시트: s.id, 보임: s.보기?.눈금선 === false });
  }

  // ── 유효성 목록 — ▼ 단추 · Alt+↓ ─────────────────────────────────────────
  let drop: HTMLElement | null = null;
  const closeDrop = (): void => {
    drop?.remove();
    drop = null;
  };
  const arrow = el("button", {
    className: "ss-list-arrow",
    text: "▼",
    attrs: { type: "button", hidden: "", title: TEXT.list },
  });
  arrow.addEventListener("mousedown", (e) => e.preventDefault());
  arrow.addEventListener("click", () => openList());
  ctx.root.append(arrow);
  /** 칸 자리(부품 뿌리 기준) */
  const at = (r: number, c: number) => {
    const { box } = ctx.grid.editorSlot(r, c);
    const g = ctx.grid.root.getBoundingClientRect();
    const o = ctx.root.getBoundingClientRect();
    return { x: box.x + g.left - o.left, y: box.y + g.top - o.top, w: box.w, h: box.h };
  };
  function openList(): boolean {
    const { r, c } = ctx.selection.활성;
    const rule = findValidation(ctx.sheet(), r, c);
    if (ctx.readOnly || !rule) return false;
    closeDrop();
    drop = createValidationDropdown(ctx, r, c, rule, (value) => {
      closeDrop();
      const key = toA1(r, c);
      const n = Number(value);
      const 값 = value !== "" && Number.isFinite(n) ? n : value;
      const 서식 = ctx.sheet().칸[key]?.서식;
      const cell = 서식 === undefined ? { 값 } : { 값, 서식 };
      ctx.dispatch({ 종류: "칸", 시트: ctx.selection.시트, 칸: { [key]: cell } });
      back();
    });
    if (!drop) return false;
    const p = at(r, c);
    drop.style.left = `${p.x}px`; // cellBox(스크롤 전 내용 좌표) 자리를 화면 자리로 고침
    drop.style.top = `${p.y + p.h}px`;
    ctx.root.append(drop);
    return true;
  }
  const onOutside = (e: MouseEvent): void => {
    if (drop && !drop.contains(e.target as Node) && e.target !== arrow) closeDrop();
  };
  document.addEventListener("mousedown", onOutside, true);

  /** 자동 합계 — 엑셀처럼 =SUM(잡은 범위) 로 편집을 열고 Enter 는 사용자 몫 */
  function autosum(): void {
    const g = autoSumRange(ctx);
    ctx.editor.begin(g ? `=SUM(${rangeToA1(g)})` : "=SUM()");
  }

  const buttons = ctx.readOnly
    ? []
    : [
        button("↑", TEXT.asc, () => sortSelection(ctx, false)),
        button("↓", TEXT.desc, () => sortSelection(ctx, true)),
        button("필터", TEXT.filter, () => toggleFilter(ctx)),
        button("Σ", TEXT.sum, autosum, true),
        button(TEXT.menu, TEXT.menu, openMenu, true),
      ];

  return {
    buttons,
    keys: {
      filter: () => toggleFilter(ctx),
      autosum,
      dropdown() {
        const f = ctx.sheet().필터;
        const g = f && parseRange(f.범위);
        const { r, c } = ctx.selection.활성;
        if (g && r === g.r0 && c >= g.c0 && c <= g.c1) return (filter.open(c), true);
        return openList();
      },
    },
    part: {
      root: null,
      refresh() {
        filter.refresh();
        trace.refresh();
        tip.refresh();
        panel?.refresh();
        closeDrop();
        const { r, c } = ctx.selection.활성;
        const list = !ctx.readOnly && findValidation(ctx.sheet(), r, c)?.규칙.종류 === "목록";
        arrow.hidden = !list || ctx.editor.editing();
        if (!list) return;
        const p = at(r, c);
        arrow.style.left = `${p.x + p.w + 1}px`;
        arrow.style.top = `${p.y}px`;
        arrow.style.height = `${p.h}px`;
      },
      destroy() {
        document.removeEventListener("mousedown", onOutside, true);
        closeSort?.();
        closePanel();
        closeDrop();
        filter.destroy();
        closeSteps?.();
        trace.destroy();
        tip.destroy();
        menu.element.remove();
        dialog.remove();
        arrow.remove();
        buttons.forEach((b) => b.remove());
      },
    },
  };
}