/* =============================================================================
 * M01_MasterData_UI_LogicLab_Sheet.ts
 * M01 단가산출 로직 상세 「시트」 보기(PLAN 794-1 · 요구 650~652 · 요구서_652 1 장 6) — M02 단가산출 시트와 같은 꼴.
 *   한 줄 「이름 | 식 | 값 | 비목」(줄 꼴 = `logic/M01_Logic_Sheet_Model`) · 상태줄 = 지금 · 고치기 전 + [계산]
 *   식 글 = 서버 이름 꼴(`POST /api/m01/logic/sheet` · 줄이 바뀔 때만 · 옛 요청 끊음)
 *   고침 = 시스템 관리자만 — [식 고침] → 식 칸(공용 `sheet_formula_cell` · 칠 때마다 `/logic/sheet/check`)
 *     → 되면 엔진 식을 줄 사본에(`onEdit`) → 상세 캐시(drafts) → 기존 M01 [저장](서버 검사 · 개정 확인)
 *   옵션 칸 = 시험 값(저장 안 함 · 고치면 시험 계산) · 자동저장 없음 · 부품 = calc_row · 입력 · 고르기 · 단추 · 배지
 * ========================================================================== */

import { API_BASE_URL } from "@config/config_frontend";
import { createBadge } from "@ui/ui_template_badge";
import { createButton } from "@ui/ui_template_button";
import { createCalcFormula, createCalcSheetRow } from "@ui/ui_template_calc_row";
import { el } from "@ui/ui_template_elements";
import { createInputField, createSelectField } from "@ui/ui_template_input";
import { currentLanguageIndex } from "@ui/ui_template_locale";
import { createText } from "@ui/ui_template_text";
import { createToolbar } from "@ui/ui_template_toolbar";
import { createFormulaCell, type FormulaVerdict } from "../A00_Common/sheet_formula_cell";
import { formatLineMoney, formatMoney } from "../common_util/common_util_money";
import type { CalcAnswer, LogicRow } from "./M01_MasterData_UI_Logic_Api";
import {
  formulaAt,
  labItems,
  setLabFormula,
  spotKey,
  type LabItem,
  type LabKind,
  type LabNames,
  type LabPart,
} from "./logic/M01_Logic_Sheet_Model";
import "../M02_MasterTemplete/M02_MasterTemplete_Sangeun_Sheet.css";

const TEXT = {
  Sheet: ["시트", "Sheet"],
  Now: ["지금", "Now"],
  Before: ["고치기 전", "Before edit"],
  Run: ["계산", "Calculate"],
  근거: ["근거", "Basis"],
  옵션: ["옵션 · 시험 값", "Options · trial values"],
  계산: ["변수 · 계산", "Variables"],
  자원: ["자원", "Resources"],
  율: ["율 · 덧줄", "Rates"],
  단계: ["단계", "Stages"],
  소계: ["소계 · 합계", "Subtotals"],
  Edit: ["식 고침", "Edit formula"],
  Close: ["식 닫기", "Close formula"],
  Back: ["원래로", "Revert"],
  Wait: ["[계산] 을 누르면 값이 채워짐", "Press Calculate to fill values"],
  Address: ["번지", "Address"],
} as const satisfies Record<string, readonly [string, string]>;
const t = (k: keyof typeof TEXT): string => TEXT[k][currentLanguageIndex as 0 | 1] ?? TEXT[k][0];

const SECTION: Record<LabKind, keyof typeof TEXT> = {
  근거: "근거",
  옵션: "옵션",
  계산: "계산",
  자원: "자원",
  율: "율",
  단계: "단계",
  소계: "소계",
  합계: "소계",
};
const ORDER: (keyof typeof TEXT)[] = ["근거", "옵션", "계산", "자원", "율", "단계", "소계"];
const NUM = new Intl.NumberFormat("ko-KR", { maximumFractionDigits: 4 });

export interface LabSheetDraw {
  row: LogicRow;
  /** 저장본 줄(새 로직 = null) */
  original: LogicRow | null;
  values: Record<string, string>;
  answer: CalcAnswer | null;
}

export interface LabSheetOptions {
  /** 시스템 관리자 — 식 칸 · [식 고침] · [원래로] */
  admin: boolean;
  onInput: (name: string, value: string) => void;
  /** 줄 식 칸을 고친 뒤(줄 객체는 여기서 고침) — 상세가 캐시(touch) · 다시 그림 */
  edited: () => void;
  /** 시험 계산 [계산] 누름 */
  run: () => void;
}

async function post<T>(path: string, body: unknown, signal?: AbortSignal): Promise<T> {
  const r = await fetch(`${API_BASE_URL}/m01${path}`, {
    method: "POST",
    credentials: "include",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
    signal,
  });
  const data = (await r.json().catch(() => ({}))) as T & { detail?: unknown };
  if (!r.ok) throw new Error(typeof data.detail === "string" ? data.detail : r.statusText);
  return data;
}

export function createLabSheet(opt: LabSheetOptions) {
  const status = el("div", { className: "m02-sks__status", attrs: { "data-lab-status": "" } });
  const body = el("div", { className: "m02-sks__body" });
  const run = createButton({ label: t("Run"), variant: "ghost", size: 28, onClick: opt.run });
  const root = el("div", {
    className: "m02-sks",
    attrs: { "data-lab-sheet": "" },
    children: [createToolbar({ items: [run, "divider", status], label: t("Sheet") }), body],
  });
  let last: LabSheetDraw | null = null;
  let names: LabNames | null = null;
  let asked = "";
  let ctl: AbortController | null = null;
  let before: number | null = null;
  let beforeAt = ""; // 고치기 전 값을 잰 시험 값(옵션) — 옵션이 바뀌면 고친 줄의 「고치기 전」 은 모름
  const open = new Set<string>();
  const drafts = new Map<string, string>();

  /** 줄이 바뀌면 이름 꼴 식 글을 다시 받음(옛 요청 끊음) */
  const askNames = (row: LogicRow): void => {
    const text = JSON.stringify(row);
    if (text === asked) return;
    asked = text;
    ctl?.abort();
    const mine = (ctl = new AbortController());
    post<LabNames>("/logic/sheet", { row }, mine.signal).then(
      (got) => {
        if (mine !== ctl) return;
        names = got;
        if (last) paint(last);
      },
      () => undefined, // 못 받으면 엔진 식 그대로 보임
    );
  };

  const check =
    (row: LogicRow, part: LabPart, at: number) =>
    (text: string, signal: AbortSignal): Promise<FormulaVerdict> =>
      post<FormulaVerdict>("/logic/sheet/check", { row, 갈래: part, 차례: at, 식: text }, signal);

  const money = (it: LabItem): string => {
    const v = it.값;
    if (typeof v !== "number") return it.kind === "옵션" ? (it.input?.단위 ?? "") : String(v ?? "");
    if (it.kind === "자원" || it.kind === "율") return formatLineMoney(v);
    return it.kind === "소계" || it.kind === "합계" ? formatMoney(v) : NUM.format(v);
  };

  function optionCell(d: LabSheetDraw, it: LabItem): HTMLElement {
    const spec = it.input!;
    const value = d.values[spec.이름] ?? "";
    if (spec.고르기?.length) {
      const sel = createSelectField({
        options: ["", ...spec.고르기.map(String)].map((o) => ({ value: o, text: o })),
        value,
        compact: true,
        size: 24,
        ariaLabel: spec.이름,
        onChange: (v) => opt.onInput(spec.이름, v),
      });
      sel.select.dataset.sheetCell = `opt|${spec.이름}`;
      return sel.root;
    }
    const box = createInputField({ value, compact: true, size: 24 });
    box.input.setAttribute("aria-label", spec.이름);
    box.input.dataset.sheetCell = `opt|${spec.이름}`;
    box.input.addEventListener("change", () => opt.onInput(spec.이름, box.input.value.trim()));
    return box.root;
  }

  function tail(d: LabSheetDraw, it: LabItem): HTMLElement {
    const kids: HTMLElement[] = it.비목 ? [createBadge(it.비목, "neutral")] : [];
    if (it.번지) kids.push(createBadge(`${t("Address")} ${it.번지}`, "info"));
    if (opt.admin && it.part && it.at !== undefined) {
      const key = spotKey(it.part, it.at);
      const on = open.has(key);
      const toggle = createButton({
        label: on ? t("Close") : t("Edit"),
        variant: "ghost",
        size: 22,
        onClick: () => {
          if (on) open.delete(key);
          else open.add(key);
          drafts.delete(key);
          paint(d);
        },
      });
      toggle.dataset.sheetFxToggle = key;
      kids.push(toggle);
      if (it.changed && d.original) {
        const { part, at } = it;
        const back = createButton({
          label: t("Back"),
          variant: "ghost",
          size: 22,
          onClick: () => edit(d, part, at, null),
        });
        back.dataset.sheetRevert = key;
        kids.push(back);
      }
    }
    return el("span", { children: kids });
  }

  function rowOf(d: LabSheetDraw, it: LabItem): HTMLElement {
    const key = it.part && it.at !== undefined ? spotKey(it.part, it.at) : "";
    const editing = opt.admin && key && open.has(key) && it.part && it.at !== undefined;
    const middle =
      it.kind === "옵션"
        ? optionCell(d, it)
        : el("div", {
            className: "m02-sks__mid",
            children: [
              createCalcFormula(it.식 || (["근거", "소계", "합계"].includes(it.kind) ? "" : "—")),
              ...(editing
                ? [
                    createFormulaCell({
                      key,
                      spot: key,
                      shown: it.식,
                      origin: it.식,
                      drafts,
                      check: check(d.row, it.part!, it.at!),
                      put: (engine) => {
                        if (engine === null) return;
                        open.delete(key);
                        edit(d, it.part!, it.at!, engine);
                      },
                    }),
                  ]
                : []),
            ],
          });
    const value = el("span", {
      className: `ui-calc-row__out${it.kind === "소계" || it.kind === "합계" ? " is-key" : ""}`,
      text: money(it),
    });
    const row = createCalcSheetRow(it.이름, middle, value, tail(d, it));
    row.dataset.sheetKind = it.kind;
    if (key) row.dataset.sheetSpot = key;
    if (it.changed) row.classList.add("is-changed");
    return row;
  }

  function drawStatus(d: LabSheetDraw): void {
    const ok = d.answer?.ok ? d.answer : null;
    const now = ok?.sums?.계 ?? null;
    const at = JSON.stringify(d.values);
    const same = !d.original || JSON.stringify(d.row) === JSON.stringify(d.original);
    if (same && now !== null)
      [before, beforeAt] = [now, at]; // 저장본 그대로 = 지금이 고치기 전
    else if (!same && at !== beforeAt) before = null;
    const part = (k: string, label: string, v: number | null): HTMLElement =>
      el("span", {
        className: "m02-sks__amount",
        attrs: { "data-lab-amount": k },
        children: [createText(`${label} ${v == null ? "—" : formatMoney(v)}`, "muted", 14)],
      });
    const diff = now !== null && before !== null && now !== before ? now - before : 0;
    status.replaceChildren(
      part("now", t("Now"), now),
      part("before", t("Before"), before),
      ...(diff
        ? [createBadge(`${diff > 0 ? "+" : "−"}${NUM.format(Math.abs(diff))}`, "warning")]
        : []),
    );
  }

  function paint(d: LabSheetDraw): void {
    last = d;
    drawStatus(d);
    const items = labItems({ ...d, names });
    const active = document.activeElement as HTMLElement | null;
    const keep = active && body.contains(active) ? active.dataset.sheetCell : "";
    const typed = active instanceof HTMLInputElement && keep ? active.value : null; // 치던 글 지킴
    const out: HTMLElement[] = [];
    for (const sec of ORDER) {
      const mine = items.filter((it) => SECTION[it.kind] === sec);
      if (!mine.length) continue;
      out.push(
        el("div", {
          className: "m02-sks__head",
          attrs: { "data-sheet-section": sec },
          children: [createText(t(sec), "muted", 14)],
        }),
        ...mine.map((it) => rowOf(d, it)),
      );
    }
    if (!d.answer) out.push(createText(t("Wait"), "muted"));
    body.replaceChildren(...out);
    const back = keep
      ? body.querySelector<HTMLElement>(`[data-sheet-cell="${CSS.escape(keep)}"]`)
      : null;
    if (back instanceof HTMLInputElement && typed !== null) back.value = typed;
    back?.focus();
  }

  /** 식 칸 고침(엔진 식) · null = 저장본 식 → 상세 캐시 · 시험 계산 다시 */
  function edit(d: LabSheetDraw, part: LabPart, at: number, engine: string | null): void {
    const text = engine ?? (d.original ? formulaAt(d.original, part, at) : null);
    if (text === null || !setLabFormula(d.row, part, at, text)) return;
    opt.edited();
    opt.run();
  }

  let answer: CalcAnswer | null = null;
  let answerOf: Record<string, string> | null = null; // 답을 받은 로직(시험 값 그릇 = 연 로직마다 하나)
  let base: { src: string | null; row: LogicRow | null } = { src: null, row: null };
  return {
    root,
    /** 시험 계산 답 — 상세 `buildCalc` onAnswer */
    answer: (a: CalcAnswer) => void (answer = a),
    /** 상세가 그릴 때마다 — 줄 · 저장본 글(`original`) · 시험 값 그릇 */
    draw: (row: LogicRow, original: string | null, values: Record<string, string>) => {
      if (answerOf !== values) [answer, answerOf] = [null, values]; // 다른 로직 · 저장 뒤
      if (base.src !== original) {
        base = { src: original, row: original ? (JSON.parse(original) as LogicRow) : null };
        open.clear(); // 연 식 칸 · 치던 글 버림
        drafts.clear();
      }
      askNames(row);
      paint({ row, original: base.row, values, answer });
    },
  };
}