async function backfillData() {
  const button = document.querySelector("#backfillButton");
  button.disabled = true;
  setLoading(true, "正在回补历史交易日");
  try {
    const payload = await apiRequest("/api/backfill", "POST", {
      start_date: document.querySelector("#backfillStart").value,
      end_date: document.querySelector("#backfillEnd").value,
    });
    const failed = (payload.failed_count || 0);
    const skipped = (payload.skipped_non_trading_days || []).length;
    const suffix = failed
      ? `，失败 ${failed} 个`
      : skipped
        ? `，跳过 ${skipped} 个非交易日`
        : "";
    showToast(`历史回补完成，共处理 ${payload.results.length} 个交易日${suffix}`);
    state.sentimentHistory = null;
    state.sentimentHistoryKey = "";
    if (state.activeView === "sentimentCycleView") {
      await loadSentimentHistory(true);
    }
    await openAdminSettings(true);
  } catch (error) {
    showToast(error.message);
  } finally {
    setLoading(false);
    button.disabled = false;
  }
}


async function openAdminSettings(refreshOnly = false) {
  if (state.user?.role !== "admin") return;
  if (!refreshOnly) openModalDialog(elements.adminDialog);
  const status = document.querySelector("#adminConnectionStatus");
  status.textContent = "正在读取系统状态";
  try {
    const payload = await apiRequest("/api/admin/settings");
    const data = payload.data || {};
    const ifind = data.ifind || {};
    status.textContent = `数据中枢 ${data.configured ? "已连接" : "未连接"} · iFinD ${ifind.configured ? "已配置" : "未配置"} · ${number(data.snapshot_dates)} 个交易日`;
    status.classList.toggle("connected", Boolean(data.configured));
    setText("systemDataStatus", data.background_refresh_enabled ? "后台刷新已启用" : "后台刷新已暂停");
    renderDatahubRouteStatus(data.datahub || {});
    document.querySelector("#systemBackgroundRefresh").checked = Boolean(data.background_refresh_enabled);
  } catch (error) {
    status.textContent = error.message || "系统配置读取失败";
  }
}

function dataHubConsoleUrl() {
  if (window.XIAOBAI_DATAHUB_URL) return String(window.XIAOBAI_DATAHUB_URL);
  // HEL-564: 固定内网地址。域名只反代 8765，按主机名推导会拼出打不开的
  // <域名>:8766；数据中枢也不该被外网摸到。
  return "http://192.168.200.11:8766/admin/";
}

function openDataHubConsole() {
  if (state.user?.role !== "admin") return;
  window.open(dataHubConsoleUrl(), "_blank", "noopener");
}

function renderDatahubRouteStatus(hub) {
  const box = document.querySelector("#datahubRouteStatus");
  if (!box) return;
  const label = box.querySelector("span");
  const enabled = number(hub.enabled_reads);
  const total = number(hub.total_reads) || enabled;
  const fallbacks = hub.fallback_labels || [];
  if (fallbacks.length) {
    box.dataset.tone = "warning";
    if (label) label.textContent = `数据中枢主线路 ${enabled}/${total} · 备用 ${fallbacks.length} 类：${fallbacks.join("、")}`;
    return;
  }
  box.dataset.tone = hub.configured ? "success" : "idle";
  if (label) {
    label.textContent = hub.configured
      ? `数据中枢主线路 ${enabled}/${total}，当前无备用`
      : "数据中枢未配置，网站只保留已有真实快照";
  }
}

async function saveMarketSettings(event) {
  event.preventDefault();
  const button = event.currentTarget.querySelector("button[type='submit']");
  button.disabled = true;
  try {
    await apiRequest("/api/admin/settings", "POST", {
      background_refresh_enabled: document.querySelector("#systemBackgroundRefresh").checked,
    });
    showToast("行情刷新设置已保存");
    await openAdminSettings(true);
  } catch (error) {
    showToast(error.message || "系统配置保存失败");
  } finally {
    button.disabled = false;
  }
}


function bindAdminEvents() {
  document.querySelector("#settingsButton").addEventListener("click", openDataHubConsole);
  document.querySelector("#marketAdminButton").addEventListener("click", () => openAdminSettings());
  document.querySelector("#closeAdminDialog").addEventListener("click", () => elements.adminDialog.close());
  document.querySelector("#backfillButton").addEventListener("click", backfillData);
  document.querySelector("#systemMarketForm").addEventListener("submit", saveMarketSettings);
  document.querySelector("#adminRefreshButton").addEventListener("click", startAdminRefresh);
}