/* =============================================================================
 * M01_MasterData_UI_Rows.ts
 * 요소 파일(인력·재료·기계·환율·요율) 표 — 한 줄 = 요소 · 이름 찾기 · 쪽 나눔 · 눌러 고침(노랑)
 * ========================================================================== */

import { createButton, el, showToast } from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import { openPickModal } from "./M01_MasterData_UI_Pick";
import { saveView, type Pick } from "./M01_MasterData_UI_Side";
import { fetchRows, type Row, type RowsPage } from "./M01_MasterData_Api_Fetch";
import {
  addRow,
  editRow,
  onDraftChange,
  peek,
  removeAdd,
  same,
  setAdd,
  toggleDelete,
} from "./M01_MasterData_Draft";
import {
  buildCell,
  buildPager,
  coerce,
  flatten,
  isScalar,
  SEP,
  show,
  withCell,
} from "./M01_MasterData_UI_Cells";

const SIZE = 50;
const MARKET = "재료_자재품목.json";
const LINKED = "재료_품셈재료.json";
const JOB = ["인력.json"];
const NOTE = "비고"; // 끝 열(인력은 준용 앞) · 줄에 없으면 빈 칸 · 눌러 적음
const FALLBACK: Row = { 키: "", 원문번호: "", 이름: "", 규격: "", 단위: "", 값: null, 출처: "" };

/** 새 줄 바탕 — 본 줄과 같은 칸 · 글 칸은 "" · 수·값 칸은 null. */
function blank(sample: Row): Row {
  const out: Row = {};
  for (const [k, v] of Object.entries(sample)) {
    if (v && typeof v === "object" && !Array.isArray(v)) out[k] = blank(v as Row);
    else out[k] = typeof v === "string" && k !== "값" ? "" : null;
  }
  return out;
}

/** 비고 칸 고침 — 빈 글이면 칸을 지움 */
function withNote(row: Row, text: string): Row {
  const out = { ...row };
  if (text.trim()) out[NOTE] = text;
  else delete out[NOTE];
  return out;
}

/** 요소별 전용 칸으로 그리는 칸 · 접어 두는 칸 — 일반 칸에서 뺌. */
function hidden(file: string, col: string): boolean {
  if (file === MARKET) return col.split(SEP)[0] === "면수"; // 면수는 접어 둠
  if (file === LINKED) return col.startsWith("연결");
  return JOB.includes(file) && col === "준용";
}

/** 키(한 번 주면 안 바뀜) · 빌더가 원문에서 채운 칸(구분 · 상세구분 · 옛이름) — 읽기 전용. */
const fixed = (file: string, col: string): boolean =>
  col === "키" ||
  (JOB.includes(file) && ["구분", "상세구분", "상태", "옛이름"].includes(col.split(SEP)[0]));

const HEADS: Record<string, string[]> = {
  [LINKED]: ["M01_PriceCol"],
  [JOB[0]]: ["M01_JobCol"],
};

const linkText = (link: unknown): string =>
  link && typeof link === "object"
    ? `${L("M01_PriceCondUsed")}: ${(link as Row)["이름"]} ${(link as Row)["규격"] ?? ""}`.trim()
    : String(link ?? "");

/** 키 → 이름(서버가 준 것 + 방금 고른 것) — 참조 칸에 키 옆에 같이 보임 */
const names = new Map<string, string>();
const KEY = /[A-Z]{2}\d{6}/;
const named = (text: string): string => {
  const name = names.get(KEY.exec(text)?.[0] ?? "");
  return name ? `${text} · ${name}` : text;
};
const remember = (ref: string | null, name?: string): void => {
  const key = KEY.exec(ref ?? "")?.[0];
  if (key && name) names.set(key, name);
};

/** 돌려받은 함수 = 이 화면을 걷을 때 부를 해제. */
export function renderRows(host: HTMLElement, pick: Pick, q: string): () => void {
  const { sub, detail, state } = pick;
  const file = pick.file.file;
  let page = pick.view?.page ?? 1;
  let data: RowsPage | null = null;
  let unlinked = false;

  const paint = (): void => {
    if (!data) return;
    const d = data;
    const draft = peek(file);
    const adds = draft?.adds ?? [];
    const cols: string[] = [];
    for (const row of [...adds, ...d.rows]) {
      for (const k of Object.keys(flatten(row)))
        if (!hidden(file, k) && k !== NOTE && !cols.includes(k)) cols.push(k);
    }
    const heads = (HEADS[file] ?? []).map((h) =>
      el("th", { text: h.startsWith("M01_") ? L(h as "M01_PriceCol") : h }),
    );
    const head = el("tr", {
      children: [
        el("th"),
        ...cols.map((c) => el("th", { text: c })),
        ...(JOB.includes(file) ? [] : heads),
        el("th", { text: NOTE }),
        ...(JOB.includes(file) ? heads : []),
      ],
    });
    const body = el("tbody");

    adds.forEach((row, i) => {
      const flat = flatten(row);
      const tr = el("tr", { className: "is-new" });
      tr.append(actionCell(L("M01_RowRemove"), () => removeAdd(file, i)));
      for (const c of cols) {
        tr.append(
          buildCell(show(flat[c]), {
            changed: true,
            onEdit: (text) => setAdd(file, i, withCell(row, c, coerce(text, flat[c]))),
          }),
        );
      }
      tr.append(
        buildCell(show(row[NOTE]), {
          changed: true,
          onEdit: (text) => setAdd(file, i, withNote(row, text)),
        }),
      );
      if (JOB.includes(file)) tr.append(el("td"));
      body.append(tr);
    });

    for (const row of d.rows) {
      const key = String(row["키"]);
      const cur = draft?.edits[key] ?? row;
      const deleted = draft?.deletes.includes(key) ?? false;
      const orig = flatten(row);
      const now = flatten(cur);
      const tr = el("tr");
      tr.classList.toggle("is-deleted", deleted);
      tr.append(
        actionCell(deleted ? L("M01_RowRestore") : L("M01_RowDelete"), () =>
          toggleDelete(file, d.version, key),
        ),
      );
      for (const c of cols) {
        const editable = !deleted && isScalar(orig[c]) && !fixed(file, c);
        tr.append(
          buildCell(show(now[c]), {
            changed: !same(now[c], orig[c]),
            onEdit: editable
              ? (text) =>
                  editRow(file, d.version, key, row, withCell(cur, c, coerce(text, orig[c])))
              : undefined,
          }),
        );
      }
      const put = deleted
        ? undefined
        : (next: Row): void => editRow(file, d.version, key, row, next);
      if (file === LINKED) tr.append(linkedCell(row, cur, put));
      tr.append(
        buildCell(show(cur[NOTE]), {
          changed: !same(cur[NOTE], row[NOTE]),
          onEdit:
            deleted || !isScalar(row[NOTE])
              ? undefined
              : (text) => editRow(file, d.version, key, row, withNote(cur, text)),
        }),
      );
      if (JOB.includes(file)) tr.append(wageCell(row, cur, put));
      body.append(tr);
    }

    const only =
      file === LINKED
        ? [
            createButton({
              label: L("M01_OnlyUnlinked"),
              variant: unlinked ? "filled" : "ghost",
              onClick: () => {
                unlinked = !unlinked;
                page = 1;
                void load();
              },
            }),
          ]
        : [];
    const add = createButton({ label: L("M01_RowAdd"), variant: "ghost" });
    add.addEventListener("click", () => {
      const fresh = blank(d.rows[0] ?? FALLBACK);
      const col = ["구분", "세부분류"].find((c) => c in fresh);
      addRow(file, d.version, sub && col ? { ...fresh, [col]: sub } : fresh);
    });
    const empty =
      d.rows.length || adds.length
        ? []
        : [el("p", { className: "m01-master__empty", text: L("M01_NoRows") })];
    host.replaceChildren(
      el("div", {
        className: "m01-master__bar",
        children: [add, ...only, buildPager(d.total, SIZE, d.page, go)],
      }),
      el("div", {
        className: "m01-master__grid-wrap",
        children: [
          el("table", {
            className: "m01-master__grid",
            children: [el("thead", { children: [head] }), body],
          }),
        ],
      }),
      ...empty,
    );
  };

  const go = (next: number): void => {
    page = next;
    void load();
  };

  const load = async (): Promise<void> => {
    try {
      data = await fetchRows(file, page, SIZE, q, unlinked, sub, detail, state);
      for (const [key, name] of Object.entries(data.refs ?? {})) names.set(key, name);
      saveView(pick.group, { page: data.page });
      paint();
    } catch (error) {
      showToast(error instanceof Error ? error.message : L("M01_LoadFailed"), "error");
    }
  };

  const off = onDraftChange(paint);
  void load();
  return off;
}

function actionCell(label: string, onClick: () => void): HTMLTableCellElement {
  return el("td", { children: [createButton({ label, variant: "ghost", onClick })] });
}

type Put = (row: Row) => void;

const rowBtn = (label: string): HTMLButtonElement => createButton({ label, variant: "ghost" });

/** 품셈재료 — 가격 연결(자재품목 키 · 후보 조건 · 없음) · 고르기 모달. */
function linkedCell(row: Row, cur: Row, put?: Put): HTMLTableCellElement {
  const link = cur["연결"];
  const td = buildCell(named(linkText(link)), {
    changed: JSON.stringify(link ?? null) !== JSON.stringify(row["연결"] ?? null),
  });
  if (put) {
    const cond = link && typeof link === "object" ? (link as Row) : null;
    const name = String(cond?.["이름"] ?? cur["이름"] ?? "");
    const spec = String(cond?.["규격"] ?? cur["규격"] ?? "");
    const btn = rowBtn(L("M01_PriceFind"));
    btn.addEventListener("click", () =>
      openPickModal({
        kind: "price",
        title: `${L("M01_PriceTitle")} · ${cur["이름"] ?? ""}`,
        current: linkText(link),
        seed: `${name} ${spec}`.trim(),
        onPick: (ref, name) => {
          remember(ref, name);
          put(withCell(cur, "연결", ref));
        },
        cond: { 이름: name, 규격: spec, onCond: (c) => put(withCell(cur, "연결", c)) },
      }),
    );
    td.append(btn);
  }
  return td;
}

/** 인력 줄의 준용 = 관리자가 고르는 공표 직종 키(값이 있어도 돌릴 수 있음). */
function wageCell(row: Row, cur: Row, put?: Put): HTMLTableCellElement {
  const text = show(cur["준용"]);
  const td = buildCell(named(text), { changed: text !== show(row["준용"]) });
  if (put) {
    const btn = rowBtn(L("M01_JobFind"));
    btn.addEventListener("click", () =>
      openPickModal({
        kind: "job",
        title: `${L("M01_JobTitle")} · ${cur["이름"] ?? ""}`,
        current: text,
        seed: "",
        onPick: (ref, name, value) => {
          remember(ref, name);
          // 준용을 고르면 값도 그 직종 값으로 · 비우면 원래 값 (저장 때 서버가 다시 읽음)
          put(withCell(withCell(cur, "준용", ref), "값", ref ? value : row["값"]));
        },
      }),
    );
    td.append(btn);
  }
  return td;
}