/* =============================================================================
 * B09_Estimation_UI_Tabs_Groups.ts
 * B09 묶음 탭 셋(PLAN 171-3) — 일위대가표 · 중기사용료 · 단가산출근거 = 공용 묶음 카드(171-2) 기본 ·
 * [표로 보기] = 공용 표 그대로(맞은편 단추 = [박스보기]).
 *
 *   카드 = 탭 표 줄(`TabTable.rows`)을 호표(줄 키 앞머리)마다 묶음 — 값 · 풍선 · 누름 이동은 표와 같음
 *   머리 줄 = 묶음 첫 줄 · 합계 줄 = 키 끝 `|합계` · `|총계` · 그 밖 = 몸 줄(표 줄 번호 그대로)
 *   목록표에서 온 호표(181-2) = 박스 붉은 외곽선 · 표 보기 = 그 호표 줄 구간 전체 붉은 외곽선
 *   보기 · 가로 열 수 기억 = `b_page_state`(`b09-group-view` · `b09-group-cols` · 탭마다) · 못 읽으면 카드 · 2
 * ========================================================================== */

import type { DataRow, DataTable } from "@ui/ui_template_data_table";
import { createButton } from "@ui/ui_template_elements";
import {
  clampColumns,
  createGroupCards,
  type GroupCard,
  type GroupFoot,
  type GroupLine,
  type GroupParts,
} from "@ui/ui_template_group_cards";
import { readState, writeState } from "../A00_Common/b_page_state";
import { rowIndex, type Link, type TabId, type TabTable } from "./B09_Estimation_UI_Tabs";

export type GroupView = "cards" | "table";

/** 묶음 카드로 보이는 탭 */
export const GROUP_TABS: TabId[] = ["dg", "machine_blocks", "sg"];

export const isGroupTab = (tab: TabId): boolean => GROUP_TABS.includes(tab);

/** 단추 글 = 바꿀 보기 이름 */
export const viewLabel = (view: GroupView): string => (view === "cards" ? "표로 보기" : "박스보기");

export const flipView = (view: GroupView): GroupView => (view === "cards" ? "table" : "cards");

type Saved = Record<string, unknown> | null;

const saved = (name: "b09-group-view" | "b09-group-cols"): Saved => {
  try {
    return readState<Record<string, unknown>>(name);
  } catch {
    return null;
  }
};

/** 고른 보기 — 모르는 값 · 못 읽음 = 카드 */
export const readGroupView = (tab: TabId, kept: Saved = saved("b09-group-view")): GroupView =>
  kept?.[tab] === "table" ? "table" : "cards";

/** 고른 가로 열 수 — 1~4 · 모르는 값 = 2 */
export const readGroupCols = (tab: TabId, kept: Saved = saved("b09-group-cols")): number =>
  clampColumns(kept?.[tab]);

export function rememberGroup(
  name: "b09-group-view" | "b09-group-cols",
  tab: TabId,
  value: unknown,
): void {
  try {
    writeState(name, { ...(saved(name) ?? {}), [tab]: value });
  } catch {
    // 기억 못 해도 이 화면 안에서는 고른 값 그대로
  }
}

/* ── 표 줄 → 묶음 ─────────────────────────────────────────────────────── */

const num = (v: unknown): number | null => (typeof v === "number" ? v : null);
const str = (v: unknown): string => (v === null || v === undefined ? "" : String(v));
const parts = (r: DataRow): GroupParts => [num(r.labor), num(r.material), num(r.expense)];
/** 들여쓰기 · 「ㄴ」 뗀 이름 */
const bare = (v: unknown): string => str(v).replace(/^\s*(ㄴ\s+)?/, "");
const isFoot = (key: string): boolean => /\|(합계|총계)$/.test(key);

/** 탭마다 머리 · 몸 줄 칸 */
function headOf(tab: TabId, r: DataRow, at: number, spec: TabTable): Omit<GroupCard, "lines"> {
  const tip = (key: string) => spec.tip?.(at, key) ?? null;
  if (tab === "sg")
    return {
      key: str(r.key),
      at,
      no: str(r.kind),
      name: str(r.name ?? r.text),
      spec: str(r.note),
      specTip: tip("note"),
      unit: str(r.unit),
    };
  return {
    key: str(r.key),
    at,
    no: `제 ${str(r.no)} 호표`,
    name: str(r.title ?? r.name),
    spec: str(r.spec),
    specTip: tip("spec"),
    unit: str(r.unit),
  };
}

function lineOf(tab: TabId, r: DataRow, at: number, spec: TabTable, first: string): GroupLine {
  const tip = (key: string) => spec.tip?.(at, key) ?? null;
  const base = {
    at,
    sum: num(r.sum),
    parts: parts(r),
    note: str(r.note),
    noteTip: tip("note"),
    link: !!spec.link?.(at, first),
  };
  if (tab === "sg") return { ...base, name: bare(r.text), tag: str(r.kind) };
  return {
    ...base,
    name: bare(r.name),
    spec: str(r.spec),
    specTip: tip("spec"),
    qty: num(r.qty),
    unit: str(r.unit),
  };
}

const footOf = (r: DataRow, at: number, spec: TabTable): GroupFoot => ({
  at,
  parts: parts(r),
  sum: num(r.sum),
  note: str(r.note),
  tip: spec.tip?.(at, "sum") ?? spec.tip?.(at, "note") ?? null,
});

/** 탭 표 → 묶음 카드(줄 차례 · 표 줄 번호 그대로) */
export function tabGroups(tab: TabId, spec: TabTable): GroupCard[] {
  const first = spec.columns[0]?.key ?? "";
  const cards: GroupCard[] = [];
  const byKey = new Map<string, GroupCard>();
  spec.rows.forEach((r, at) => {
    const key = str(r.key);
    const group = byKey.get(key.split("|")[0]);
    if (!group) {
      const made: GroupCard = { ...headOf(tab, r, at, spec), lines: [] };
      byKey.set(key.split("|")[0], made);
      return void cards.push(made);
    }
    if (isFoot(key)) group.foot = footOf(r, at, spec);
    else group.lines.push(lineOf(tab, r, at, spec, first));
  });
  for (const c of cards) c.sum = c.foot?.sum ?? null;
  return cards;
}

/** 고른 호표의 표 줄 구간 [첫 줄, 끝 줄](키 `|` 앞머리가 같은 줄) · 없으면 null */
export function pickRange(rows: DataRow[], focus: string | undefined): [number, number] | null {
  if (focus === undefined) return null;
  const head = focus.split("|")[0];
  const at = rows.flatMap((r, i) => (str(r.key).split("|")[0] === head ? [i] : []));
  return at.length ? [at[0], at[at.length - 1]] : null;
}

/** 표 줄 class — 구간 안 `is-pick` · 첫 줄 `is-pick-top` · 끝 줄 `is-pick-end` */
export function pickClass(range: [number, number] | null, i: number): string | null {
  if (!range || i < range[0] || i > range[1]) return null;
  return ["is-pick", i === range[0] && "is-pick-top", i === range[1] && "is-pick-end"]
    .filter(Boolean)
    .join(" ");
}

/** 표 열과 같은 숫자 꼴(열 소수 자리) */
function numberFormat(spec: TabTable, key: string): (v: number | null | undefined) => string {
  const c = spec.columns.find((col) => col.key === key);
  const f = new Intl.NumberFormat("ko-KR", {
    minimumFractionDigits: c?.trim ? 0 : (c?.decimals ?? 0),
    maximumFractionDigits: c?.decimals ?? 0,
  });
  return (v) => (v === null || v === undefined || !Number.isFinite(v) ? "" : f.format(v));
}

/* ── 그리기 ───────────────────────────────────────────────────────────── */

/** 이 화면 안 보기(기억이 안 돼도 바꾼 보기 유지) */
const chosen = new Map<TabId, GroupView>();

/** 묶음 탭 — 머리(안내 + 보기 단추) · 고른 보기(카드 · 표) */
export function renderGroupPanel(o: {
  tab: TabId;
  spec: TabTable;
  hint: HTMLElement | null;
  focus?: string;
  goto: (link: Link | null) => void;
  makeTable: (rowClass?: (index: number) => string | null) => DataTable;
  redraw: () => void;
}): HTMLElement[] {
  const view = chosen.get(o.tab) ?? readGroupView(o.tab);
  const toggle = createButton({
    label: viewLabel(view),
    variant: "ghost",
    size: "sm",
    onClick: () => {
      chosen.set(o.tab, flipView(view));
      rememberGroup("b09-group-view", o.tab, flipView(view));
      o.redraw();
    },
  });
  toggle.dataset.b09GroupView = view;
  const bar = document.createElement("div");
  bar.className = "b09-estimation__bar";
  bar.append(...(o.hint ? [o.hint] : []), toggle);
  const at = o.focus === undefined ? -1 : rowIndex(o.spec.rows, o.focus);
  if (view === "cards") {
    const first = o.spec.columns[0]?.key ?? "";
    const cards = createGroupCards({
      groups: tabGroups(o.tab, o.spec),
      columns: readGroupCols(o.tab),
      onColumns: (n) => rememberGroup("b09-group-cols", o.tab, n),
      onPick: (i) => o.goto(o.spec.link?.(i, first) ?? null),
      focus: at,
      money: numberFormat(o.spec, "sum"),
      qty: numberFormat(o.spec, "qty"),
    });
    cards.dataset.b09Table = o.tab;
    return [bar, cards];
  }
  const range = pickRange(o.spec.rows, o.focus);
  const table = o.makeTable((i) => pickClass(range, i));
  if (at >= 0) requestAnimationFrame(() => table.focusRow(at));
  return [bar, table.root];
}