/* =============================================================================
 * M02_MasterTemplete_Labor_Pick.ts
 * [로직 더하기] 창 — 구분 → 상세구분 → 찾기로 사용자가 로직을 하나씩 고름(자동 추천 없음) ·
 * 탭 단가산출 · 단가승격 · 사전조합(50-3 ④) — 서고 탭은 층 단추(위 층만 · 짝 `M02_Labor_Ref.readable`) +
 * 그 층 목록 · 고르면 참조 {층 · 주인 · 키} · 프로젝트 · 카드엔 서고 탭 없음
 * ========================================================================== */

import {
  createButton,
  createInputField,
  createSelectField,
  el,
  showToast,
} from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import type { LogicSummary, SubBrief } from "../M01_MasterData/M01_MasterData_UI_Logic_Api";
import { fetchSessionUser } from "../A06_Login/A06_Login_Api_Fetch";
import type { Layer } from "./M02_MasterTemplete_Api_Fetch";
import {
  fetchLibLogics as fetchLogics,
  fetchLibLogicSubs as fetchLogicSubs,
  fetchLibrary,
  type LibraryRow,
} from "./M02_MasterTemplete_Labor_Api";
import type { LaborRef } from "./M02_MasterTemplete_Labor_Calc";
import { ownOwner } from "./M02_MasterTemplete_Layer";
import { tc } from "./M02_MasterTemplete_Labor_Text";
import "../M01_MasterData/M01_MasterData_UI_Logic_Style.css"; // 창 겉틀
import "./M02_MasterTemplete_Labor.css";

const opts = (values: string[]): { value: string; text: string }[] =>
  [L("M01_All"), ...values].map((v, i) => ({ value: i ? v : "", text: v }));

type Scope = Omit<LaborRef, "키">;
/** 서고 탭 — 일위대가가 있는 층 · 주인(null = 자기 층) · 고르면 참조 */
export interface LibraryPick {
  layer: Layer;
  owner: string | null;
  pick: (ref: LaborRef, name: string) => void;
}

/** 고를 수 있는 층 — 위 층만(마스터 → 마스터 · 회사 → 그 회사 · 마스터 · 개인 → 그 개인 · 그 회사 · 마스터) */
async function upper(layer: Layer, owner: string | null): Promise<Scope[]> {
  if (layer === "project") return [];
  const own =
    layer === "system"
      ? null
      : (owner ?? ownOwner(layer, await fetchSessionUser().catch(() => null)));
  const out: Scope[] = [{ 층: "system", 주인: null }];
  if (own) out.push({ 층: "company", 주인: own.split("/")[0] });
  if (own && layer === "personal") out.push({ 층: "personal", 주인: own });
  return out;
}
const LAYER_TEXT = {
  system: "Lib_System",
  company: "Lib_Company",
  personal: "Lib_Personal",
} as const;

export function openLogicPicker(done: (logic: LogicSummary) => void, lib?: LibraryPick): void {
  const subs: SubBrief[] = [];
  let all: LogicSummary[] = [];
  const sub = createSelectField({ options: opts([]), compact: true, label: tc("Sub") });
  const detail = createSelectField({ options: opts([]), compact: true, label: tc("Detail") });
  detail.select.disabled = true;
  const searchField = createInputField({ type: "search", placeholder: tc("Pick_Search") });
  const list = el("div", { className: "m01-logic__pick-list" });
  const hint = el("p", { className: "m01-logic__muted", text: tc("Pick_Hint") });
  const close = (): void => backdrop.remove();

  const find = (): void => {
    const q = searchField.input.value.trim().toLowerCase();
    const found = all.filter(
      (x) =>
        (!sub.select.value || x.구분 === sub.select.value) &&
        (!detail.select.value || x.상세구분 === detail.select.value) &&
        (!q || `${x.키} ${x.이름}`.toLowerCase().includes(q)),
    );
    hint.textContent = found.length ? `${found.length} / ${all.length}` : tc("Pick_None");
    list.replaceChildren(
      ...found.slice(0, 100).map((x) => {
        const row = el("button", {
          className: "m01-logic__pick-row m01-logic__pick-row--button",
          attrs: { type: "button", "data-pick": x.키 },
          children: [
            el("div", {
              className: "m01-logic__stack",
              children: [
                el("strong", { text: x.이름 }),
                el("span", {
                  className: "m01-logic__muted",
                  text: `${x.키} · ${x.구분} ${x.상세구분}`.trim(),
                }),
              ],
            }),
            el("span", { text: `${x.결과단위}${x.blocked ? ` · ${tc("Pick_Blocked")}` : ""}` }),
          ],
        });
        row.addEventListener("click", () => {
          close();
          done(x);
        });
        return row;
      }),
    );
  };
  sub.select.addEventListener("change", () => {
    const d = subs.find((s) => s.name === sub.select.value)?.details ?? [];
    detail.setOptions(opts(d), "");
    detail.select.disabled = d.length === 0;
  });

  /* 서고 탭(50-3 ④) — 탭 · 층 단추 · 목록 */
  const filters = el("div", {
    className: "m01-logic__filters",
    children: [
      sub.root,
      detail.root,
      searchField.root,
      createButton({ label: tc("Pick_Find"), variant: "filled", onClick: find }),
    ],
  });
  const tabs = el("div", { className: "ui-btn-group", attrs: { "data-pick-tabs": "" } });
  const layerBar = el("div", { className: "ui-btn-group", attrs: { "data-pick-layers": "" } });
  let tab: "logic" | "promote" | "precombo" = "logic";
  let scopes: Scope[] = [];
  let scope: Scope | null = null;
  let seq = 0;
  const libList = async (): Promise<void> => {
    if (!lib || !scope || tab === "logic") return;
    const mine = ++seq;
    const at = scope;
    list.replaceChildren();
    hint.textContent = tc("Loading");
    let rows: LibraryRow[] = [];
    try {
      rows = await fetchLibrary(at, tab);
    } catch (error) {
      if (mine === seq)
        hint.textContent = error instanceof Error ? error.message : tc("Load_Failed");
      return;
    }
    if (mine !== seq) return;
    hint.textContent = rows.length ? `${rows.length}` : tc("Pick_None");
    list.replaceChildren(
      ...rows.map((x) => {
        const row = el("button", {
          className: "m01-logic__pick-row m01-logic__pick-row--button",
          attrs: { type: "button", "data-pick": x.이름 },
          children: [
            el("div", {
              className: "m01-logic__stack",
              children: [
                el("strong", { text: x.제목 || x.이름 }),
                el("span", { className: "m01-logic__muted", text: x.이름 }),
              ],
            }),
            el("span", { text: x.단위 ?? "" }),
          ],
        });
        row.addEventListener("click", () => {
          close();
          lib.pick({ ...at, 키: x.이름 }, x.제목 || x.이름);
        });
        return row;
      }),
    );
  };
  const drawLayers = (): void =>
    layerBar.replaceChildren(
      ...scopes.map((x) =>
        createButton({
          label: tc(LAYER_TEXT[x.층 as keyof typeof LAYER_TEXT]),
          variant: x === scope ? "filled" : "ghost",
          onClick: () => {
            scope = x;
            drawLayers();
            void libList();
          },
        }),
      ),
    );
  const drawTabs = (): void => {
    tabs.replaceChildren(
      ...(["logic", "promote", "precombo"] as const).map((k) =>
        createButton({
          label: tc(
            k === "logic" ? "Kind_Logic" : k === "promote" ? "Kind_Promote" : "Lib_Precombo",
          ),
          variant: k === tab ? "filled" : "ghost",
          onClick: () => {
            tab = k;
            drawTabs();
            filters.style.display = k === "logic" ? "" : "none"; // 공용 꼴 display 가 hidden 을 이김
            layerBar.style.display = k === "logic" ? "none" : "";
            if (k === "logic") {
              list.replaceChildren();
              hint.textContent = tc("Pick_Hint");
            } else void libList();
          },
        }),
      ),
    );
  };
  layerBar.style.display = "none";
  if (lib)
    void upper(lib.layer, lib.owner).then((got) => {
      scopes = got;
      scope = got[got.length - 1] ?? null; // 기본 = 가장 가까운 층
      if (!got.length) return;
      drawTabs();
      drawLayers();
    });

  const dialog = el("div", {
    className: "m01-logic__pick m01-combo",
    attrs: { role: "dialog", "aria-label": tc("Pick_Title") },
    children: [
      el("div", {
        className: "m01-logic__section-head",
        children: [
          el("h3", { text: tc("Pick_Title") }),
          createButton({ label: tc("Pick_Close"), variant: "ghost", onClick: close }),
        ],
      }),
      tabs,
      filters,
      layerBar,
      hint,
      list,
    ],
  });
  const backdrop = el("div", { className: "m01-logic__backdrop", children: [dialog] });
  backdrop.addEventListener("click", (ev) => ev.target === backdrop && close());
  backdrop.addEventListener("keydown", (ev) => ev.key === "Escape" && close());
  document.body.append(backdrop);
  searchField.input.addEventListener("keydown", (ev) => ev.key === "Enter" && find());
  searchField.input.focus();

  void Promise.all([fetchLogicSubs(), fetchLogics()])
    .then(([s, l]) => {
      subs.push(...s);
      all = l;
      sub.setOptions(opts(s.map((x) => x.name)), "");
    })
    .catch((error) =>
      showToast(error instanceof Error ? error.message : tc("Load_Failed"), "error"),
    );
}