/* =============================================================================
 * M01_MasterData_UI_Page.ts
 * 마스터 요소 화면 — 좌측 도킹 패널(컨테이너: 인력·재료·기계·소요량·계수·환율·요율·단가산출 로직·일위대가 조합·로직 테스트)
 * / 우측 요소 표 · 표 목록 · 로직 편집
 *
 * 시스템 관리자만. 고친 것은 초안(sessionStorage)에 쌓이고 [저장] 한 번에 서버로 —
 * 자동저장 없음.
 * ========================================================================== */

import "@ui/ui_template_workflow_layout.css";
import {
  createButton,
  createInputField,
  el,
  showConfirmDialog,
  showToast,
} from "@ui/ui_template_elements";
import { t as L } from "@ui/ui_template_locale";
import { createWorkflowOverlays } from "@ui/ui_template_overlay";
import { ROUTES } from "@config/config_frontend";
import { navigateTo } from "../A00_Common/router";
import { fetchSessionUser } from "../A06_Login/A06_Login_Api_Fetch";
import { saveFiles, type FileInfo } from "./M01_MasterData_Api_Fetch";
import { discard, isStale, onDraftChange, payload, totalCount } from "./M01_MasterData_Draft";
import { renderRows } from "./M01_MasterData_UI_Rows";
import {
  buildSide,
  fileLabel,
  loadView,
  saveView,
  setMasterJump,
  setPendingLogicKey,
  takePendingLogicKey,
  type MasterJump,
  type Pick,
} from "./M01_MasterData_UI_Side";
import { loadTable } from "./M01_MasterData_UI_Logic_Note";
import { tl } from "./M01_MasterData_UI_LogicLab_Text";
import { renderTables } from "./M01_MasterData_UI_Tables";
import type { LogicHandle } from "./M01_MasterData_UI_Logic_Page";
import type { ComboHandle } from "./M01_MasterData_UI_Combo";
import "./M01_MasterData_UI_Style.css";

const TABLE_GROUPS = ["소요량", "계수"];

export async function renderM01MasterData(root: HTMLElement): Promise<void> {
  const user = await fetchSessionUser().catch(() => null);
  if (user?.role !== "SYSTEM_ADMIN") {
    showToast(L("M01_AdminOnly"), "error");
    navigateTo(ROUTES.B01_ACCOUNT);
    return;
  }
  root.innerHTML = "";
  root.append(buildPage());
}

function buildPage(): HTMLElement {
  let current: Pick | null = null;
  let query = "";
  let dispose = (): void => {};
  let logicMounted = false;
  let labMounted = false;
  let comboHandle: ComboHandle | null = null;

  /* --- 우측: 머리(제목·찾기·저장) + 알림 + 본문 --- */
  const title = el("h2", { className: "m01-master__title", text: L("M01_PickFile") });
  const searchField = createInputField({ type: "search", placeholder: L("M01_Search") });
  const search = searchField.input;
  const summary = el("span", { className: "m01-master__summary" });
  const save = createButton({ label: L("M01_Save"), variant: "filled" });
  const drop = createButton({ label: L("M01_Discard"), variant: "ghost" });
  const notice = el("div", { className: "m01-master__notice", attrs: { hidden: "" } });
  const body = el("div", { className: "m01-master__body" });
  const head = el("div", {
    className: "m01-master__head",
    children: [title, searchField.root, summary, drop, save],
  });
  const logicHost = el("div", { className: "m01-master__logic", attrs: { hidden: "" } });
  const labHost = el("div", { className: "m01-master__logic", attrs: { hidden: "" } });
  const comboHost = el("div", { className: "m01-master__logic", attrs: { hidden: "" } });
  const elementView = el("div", {
    className: "m01-master__elements",
    children: [
      head,
      notice,
      el("p", { className: "m01-master__hint", text: L("M01_WideHint") }),
      body,
    ],
  });

  const showNotice = (nodes: (HTMLElement | string)[]): void => {
    notice.replaceChildren(...nodes);
    notice.hidden = nodes.length === 0;
  };
  const refreshBar = (): void => {
    const n = totalCount();
    summary.textContent = n ? L("M01_Changed").replace("{value}", String(n)) : "";
    save.disabled = drop.disabled = n === 0;
  };
  onDraftChange(refreshBar);
  refreshBar();

  const showMode = (mode: "elements" | "logic" | "lab" | "combo"): void => {
    logicHost.hidden = mode !== "logic";
    labHost.hidden = mode !== "lab";
    comboHost.hidden = mode !== "combo";
    elementView.hidden = mode !== "elements";
  };

  const openFile = (pick: Pick): void => {
    dispose();
    showMode("elements");
    if (pick.view) {
      query = pick.view.q;
      search.value = query;
    } else saveView(pick.group, { q: query, page: 1 });
    current = { ...pick, view: undefined };
    const groupTitle = pick.group === pick.label ? [pick.group] : [pick.group, pick.label];
    title.textContent = groupTitle.join(" · ");
    dispose = TABLE_GROUPS.includes(pick.group)
      ? renderTables(body, pick, query, openLogicTab)
      : renderRows(body, pick, query);
    showNotice(isStale(pick.file.file, pick.file.version) ? [L("M01_FileStale")] : []);
  };

  let searchTimer: number | undefined;
  search.addEventListener("input", () => {
    window.clearTimeout(searchTimer);
    searchTimer = window.setTimeout(() => {
      query = search.value.trim();
      if (current) openFile(current);
    }, 300);
  });

  drop.addEventListener("click", async () => {
    if (!(await showConfirmDialog(L("M01_DiscardConfirm")))) return;
    discard();
    showNotice([]);
  });

  /** 저장·되받기 뒤 — 지금 열린 그룹의 새 판본으로 다시 그림 */
  const reloadFiles = async (): Promise<void> => {
    if (!current) return;
    const pick = current;
    try {
      const again = (await side.refresh(pick.group)).find((f) => f.file === pick.file.file);
      if (again) openFile({ ...pick, file: again, view: loadView(pick.group) });
    } catch (error) {
      showToast(error instanceof Error ? error.message : L("M01_LoadFailed"), "error");
    }
  };

  save.addEventListener("click", async () => {
    save.disabled = true;
    try {
      const result = await saveFiles(payload());
      if (result.status === 200 && "files" in result) {
        discard(result.files.map((f) => f.file));
        showNotice([]);
        showToast(L("M01_Saved"), "success");
        await reloadFiles();
      } else if (result.status === 409 && "stale" in result) {
        showNotice(staleNotice(result.stale));
      } else if (result.status === 422 && "errors" in result) {
        showNotice([
          el("strong", { text: L("M01_CheckErrors") }),
          ...result.errors.map((e) => el("p", { text: e })),
        ]);
      } else if ("detail" in result) {
        showNotice([L("M01_SaveFailed").replace("{value}", result.detail)]);
      }
    } catch (error) {
      showNotice([
        L("M01_SaveFailed").replace("{value}", error instanceof Error ? error.message : ""),
      ]);
    } finally {
      refreshBar();
    }
  });

  const staleNotice = (stale: string[]): (HTMLElement | string)[] => {
    const again = createButton({ label: L("M01_StaleReload"), variant: "ghost" });
    again.addEventListener("click", async () => {
      discard(stale);
      showNotice([]);
      await reloadFiles();
    });
    return [L("M01_Stale").replace("{value}", stale.map(fileLabel).join(", ")), again];
  };

  let logicHandle: LogicHandle | null = null;

  /** 로직 탭으로 전환 — `key` 가 있으면 그 로직을 바로 엶. */
  const openLogicTab = (key?: string): void => {
    if (key) setPendingLogicKey(key);
    dispose();
    dispose = (): void => {};
    current = null;
    showMode("logic");
    if (logicMounted) {
      const pending = takePendingLogicKey();
      if (pending) void logicHandle?.openKey(pending);
      return;
    }
    logicMounted = true;
    void import("./M01_MasterData_UI_Logic_Page").then(async (m) => {
      const pending = takePendingLogicKey();
      logicHandle = await m.mountM01Logic(logicHost, side, pending ?? undefined);
    });
  };

  /** 「로직 개선 시험」 — 정본 로직 화면의 복사본(개선은 여기서만) */
  const openLabTab = (): void => {
    dispose();
    dispose = (): void => {};
    current = null;
    showMode("lab");
    if (labMounted) return;
    labMounted = true;
    void import("./M01_MasterData_UI_LogicLab").then((m) => m.mountM01LogicLab(labHost, side));
  };

  /** 「일위대가 조합」 — 목록을 새로 받아 그림 · 로직 줄을 누르면 단가산출 로직 탭으로 */
  const openComboTab = (): void => {
    dispose();
    dispose = (): void => {};
    current = null;
    showMode("combo");
    if (comboHandle) {
      void comboHandle.show();
      return;
    }
    void import("./M01_MasterData_UI_Combo").then((m) => {
      comboHandle = m.mountM01Combo(comboHost, side, (key) => openLogicTab(key));
      void comboHandle.show();
    });
  };

  /** 알약 → 마스터 화면 — 찾기 글을 그 키로 두고 열고, 알림줄에 「시험으로 돌아가기」를 둠 */
  const jump = async (target: MasterJump): Promise<void> => {
    let group = target.kind === "element" ? target.group : "";
    let file: FileInfo | undefined;
    let ref = "";
    if (target.kind === "table") {
      const table = await loadTable(target.key);
      group =
        ["소요량", "계수"].find((g) => side.files(g).some((f) => f.file === table?.file)) ?? "";
      file = side.files(group).find((f) => f.file === table?.file);
      ref = target.key;
    } else {
      const list = side.files(group);
      file = list.find((f) => f.file === target.file) ?? list[0];
      ref = target.ref;
    }
    if (!file) return showToast(L("M01_LoadFailed"), "error");
    side.setActive(null);
    openFile({ group, file, sub: "", detail: "", label: group, view: { q: ref, page: 1 } });
    const back = createButton({ label: tl("Pill_Back"), variant: "ghost" });
    back.addEventListener("click", () => {
      showNotice([]);
      openLabTab();
    });
    showNotice([back]);
    if (target.kind === "table") {
      const key = target.key;
      const seen = new MutationObserver(() => {
        const row = body.querySelector<HTMLElement>(`[data-key="${CSS.escape(key)}"]`);
        if (!row) return;
        seen.disconnect();
        row.click();
      });
      seen.observe(body, { childList: true, subtree: true });
      window.setTimeout(() => seen.disconnect(), 8000);
    }
  };
  setMasterJump((target) => void jump(target));

  /* --- 좌측: 컨테이너 --- */
  const side = buildSide(openFile, () => openLogicTab(), openLabTab, openComboTab);

  const layout = el("div", { className: "ui-workflow-layout m01-master" });
  const main = el("main", {
    className: "ui-workflow-layout__main",
    children: [
      el("div", {
        className: "m01-master__panel",
        children: [elementView, logicHost, labHost, comboHost],
      }),
    ],
  });
  const overlays = createWorkflowOverlays({
    title: L("M01_Title"),
    optionsContent: el("div", { className: "m01-master__side", children: [side.root] }),
    showProjectName: false,
    onOptionsOpenChange: (isOpen) => layout.classList.toggle("is-options-open", isOpen),
  });
  // 좁은 화면(공용 레이아웃 860px)에서는 패널이 목록을 덮음 — 거름을 다 고르면 접음
  side.setOnPicked(() => {
    if (window.matchMedia("(max-width: 860px)").matches) overlays.setTitleOpen(false);
  });
  layout.append(
    el("div", { className: "ui-workflow-layout__body", children: [main] }),
    overlays.root,
  );
  return layout;
}