/* =============================================================================
 * M01_MasterData_UI_Machine.ts
 * M01 기계 목록(PLAN 821-2 · 요구 790-2) — 표는 목록용 열만(이름 · 규격 · 구분 · 가격 · 손료계수 ·
 * 주연료 · 조종원 · 시간당 경비(서버 값) · 별칭 · 비고) · 줄을 누르면 상세 페이지 · [새 기계] = 양식.
 * 단위 · 출처 열 없음 · 고친 것 · 새 줄 · 지울 줄은 초안(노랑 · 새 · 지움 표시) — 저장은 페이지 [저장].
 * ========================================================================== */

import { createButton, el, showToast } from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import { createEmpty } from "@ui/ui_template_empty";
import { guessRows, pageKeepFirst, watchFit } from "@ui/ui_template_pager";
import { fetchRows, type Row, type RowsPage } from "./M01_MasterData_Api_Fetch";
import { onDraftChange, peek, same } from "./M01_MasterData_Draft";
import { fetchMachineHourly } from "./M01_MasterData_Machine_Api";
import { buildPager } from "./M01_MasterData_UI_Cells";
import { saveView, type Pick } from "./M01_MasterData_UI_Side";

const BAR_H = 52;
const num = (v: unknown): string =>
  typeof v === "number" ? v.toLocaleString("ko-KR", { maximumFractionDigits: 4 }) : "";

/** 목록 열 — 이름 · 줄 → 글 */
const COLS: [string, (r: Row) => string][] = [
  ["이름", (r) => String(r["이름"] ?? "")],
  ["규격", (r) => String(r["규격"] ?? "")],
  ["구분", (r) => [r["구분"], r["상세구분"]].filter(Boolean).join(" · ")],
  ["가격(천원)", (r) => num(val(r)["가격"])],
  ["손료계수", (r) => num(val(r)["손료계수"])],
  [
    "주연료",
    (r) =>
      val(r)["주연료"] ? `${val(r)["주연료종류"] ?? ""} ${num(val(r)["주연료"])}ℓ`.trim() : "",
  ],
  [
    "조종원",
    (r) =>
      val(r)["조종원"] ? `${num(val(r)["조종원"])}인 ${val(r)["조종원직종"] ?? ""}`.trim() : "",
  ],
];
const val = (r: Row): Record<string, unknown> => (r["값"] ?? {}) as Record<string, unknown>;

/** 돌려받은 함수 = 걷기. `open(target)` = 상세(키 · 새 줄 `add:<차례>` · 새 기계 `new`). */
export function renderMachines(
  host: HTMLElement,
  pick: Pick,
  q: string,
  open: (target: string) => void,
): () => void {
  const file = pick.file.file;
  let size = guessRows(host, BAR_H);
  let page = pick.view?.page ?? 1;
  let data: RowsPage | null = null;
  const hourly = new Map<string, string>();

  const hourText = (key: string): string => hourly.get(key) ?? "…";
  const line = (row: Row, cur: Row, cls: string, target: string, key = ""): HTMLElement => {
    const tr = el("tr", {
      className: `m01-machine__row ${cls}`.trim(),
      attrs: { "data-key": key || target },
      children: [
        ...COLS.map(([, get]) => {
          const text = get(cur);
          const td = el("td", { text, attrs: { title: text } });
          td.classList.toggle("is-changed", cls !== "is-new" && text !== get(row));
          return td;
        }),
        el("td", {
          className: "m01-machine__money",
          text: key ? hourText(key) : "",
          attrs: key ? { "data-hourly": key } : {},
        }),
        el("td", { text: String(cur["별칭"] ?? ""), attrs: { title: String(cur["별칭"] ?? "") } }),
        el("td", { text: String(cur["비고"] ?? ""), attrs: { title: String(cur["비고"] ?? "") } }),
      ],
    });
    tr.addEventListener("click", () => open(target));
    return tr;
  };

  const paint = (): void => {
    if (!data) return;
    const d = data;
    const draft = peek(file);
    const body = el("tbody");
    (draft?.adds ?? []).forEach((r, i) => body.append(line(r, r, "is-new", `add:${i}`)));
    for (const row of d.rows) {
      const key = String(row["키"]);
      const cur = draft?.edits[key] ?? row;
      const cls = draft?.deletes.includes(key) ? "is-deleted" : same(cur, row) ? "" : "is-changed";
      body.append(line(row, cur, cls, key, key));
    }
    const add = createButton({ label: L("M01_MachineNew"), variant: "ghost", iconStart: "plus" });
    add.addEventListener("click", () => open("new"));
    const empty =
      d.rows.length || draft?.adds.length
        ? []
        : [createEmpty({ text: L("M01_NoRows"), small: true })];
    host.replaceChildren(
      el("div", { className: "ui-toolbar m01-master__bar", children: [add] }),
      el("div", {
        className: "ui-table-wrap m01-master__grid-wrap m01-machine__wrap",
        children: [
          el("table", {
            className: "ui-table m01-master__grid m01-machine__grid",
            children: [
              el("thead", {
                children: [
                  el("tr", {
                    children: [
                      ...COLS.map(([h]) => el("th", { text: h })),
                      el("th", { text: `${L("M01_MachineHourly")}(원)` }),
                      el("th", { text: "별칭" }),
                      el("th", { text: "비고" }),
                    ],
                  }),
                ],
              }),
              body,
            ],
          }),
        ],
      }),
      buildPager(d.total, size, d.page, go),
      ...empty,
    );
    fit.ask();
  };

  /** 시간당 경비 — 표를 그린 뒤 서버 값으로 채움(마스터 판마다 서버가 한 번 셈) */
  const fillHourly = async (keys: string[]): Promise<void> => {
    const want = keys.filter((k) => !hourly.has(k));
    if (!want.length) return;
    try {
      const got = await fetchMachineHourly(want);
      for (const [k, h] of Object.entries(got)) hourly.set(k, h.계 === undefined ? "—" : num(h.계));
    } catch {
      for (const k of want) hourly.set(k, "—");
    }
    host.querySelectorAll<HTMLElement>("td[data-hourly]").forEach((td) => {
      const text = hourly.get(td.dataset.hourly!);
      if (text) td.textContent = text;
    });
  };

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

  const load = async (): Promise<void> => {
    try {
      data = await fetchRows(file, page, size, q, false, pick.sub, pick.detail, pick.state);
      saveView(pick.group, { page: data.page });
      paint();
      void fillHourly(data.rows.map((r) => String(r["키"])));
    } catch (error) {
      showToast(error instanceof Error ? error.message : L("M01_LoadFailed"), "error");
    }
  };

  const fit = watchFit(
    host,
    () => host.querySelector<HTMLElement>(".m01-master__grid-wrap"),
    (rows) => {
      if (rows === size) return;
      page = pageKeepFirst(data?.page ?? page, size, rows);
      size = rows;
      void load();
    },
  );
  const off = onDraftChange(paint);
  void load();
  return () => {
    fit.stop();
    off();
  };
}