import { useMemo, useState } from 'react';
import { useTranslation } from 'react-i18next';
import {
  Badge,
  Button,
  Card,
  Dropdown,
  Modal,
  Popover,
  Space,
  Switch,
  Table,
  Tag,
  Tooltip,
} from 'antd';
import type { BadgeProps } from 'antd';
import type { ColumnsType } from 'antd/es/table';
import {
  ApartmentOutlined,
  ClusterOutlined,
  CloudDownloadOutlined,
  DeleteOutlined,
  EditOutlined,
  ExclamationCircleOutlined,
  EyeInvisibleOutlined,
  EyeOutlined,
  InfoCircleOutlined,
  MoreOutlined,
  PlusOutlined,
  RadarChartOutlined,
  RightOutlined,
  SafetyCertificateOutlined,
  TeamOutlined,
  ThunderboltOutlined,
} from '@ant-design/icons';

import NodeHistoryPanel from './NodeHistoryPanel';
import type { NodeRecord } from '@/api/queries/useNodesQuery';
import { isPanelUpdateAvailable } from '@/lib/panel-version';
import { activateOnKey } from '@/utils/a11y';
import './NodeList.css';

interface NodeListProps {
  nodes: NodeRecord[];
  loading?: boolean;
  isMobile?: boolean;
  latestVersion?: string;
  selectedIds: number[];
  onSelectionChange: (ids: number[]) => void;
  onAdd: () => void;
  onMtls: () => void;
  onProbeTasks: () => void;
  onEdit: (node: NodeRecord) => void;
  onDelete: (node: NodeRecord) => void;
  onProbe: (node: NodeRecord) => void;
  onToggleEnable: (node: NodeRecord, next: boolean) => void;
  onUpdateNode: (node: NodeRecord) => void;
  onUpdateSelected: () => void;
}

function isUpdateEligible(n: NodeRecord): boolean {
  return !!n.enable && n.status === 'online';
}

// One category chip of the nodes table's clients cell. When the backend
// sent the category's email list, hovering pops the list over (same
// pattern as the inbounds page); without a list it keeps the plain
// category tooltip. Chip styling is identical either way.
function CategoryChip({
  title,
  emails,
  color,
  count,
}: {
  title: string;
  emails?: string[];
  color?: string;
  count: number;
}) {
  const tag = (
    <Tag color={color} className="client-count-tag" style={{ margin: 0, padding: '0 2px' }}>
      {count}
    </Tag>
  );
  if (emails && emails.length > 0) {
    return (
      <Popover
        title={title}
        content={
          <div className="client-email-list">
            {emails.map((e) => (
              <div key={e}>{e}</div>
            ))}
          </div>
        }
      >
        {tag}
      </Popover>
    );
  }
  return <Tooltip title={title}>{tag}</Tooltip>;
}

interface NodeRow extends NodeRecord {
  url: string;
  key: string | number;
}

function badgeStatus(status?: string): BadgeProps['status'] {
  switch (status) {
    case 'online':
      return 'success';
    case 'offline':
      return 'error';
    default:
      return 'default';
  }
}

interface HealthProps {
  status?: string;
  xrayState?: string;
  xrayError?: string;
}

// Purple: the node's panel API is reachable (status=online) but its Xray core
// has failed or been stopped. Distinct from a normal offline/unknown node.
const XRAY_ERROR_COLOR = '#722ED1';

// True when the panel is online but Xray itself reports error/stop.
function hasXrayProblem(status?: string, xrayState?: string): boolean {
  if (status !== 'online') return false;
  const xs = (xrayState || '').toLowerCase().trim();
  return xs === 'error' || xs === 'stop';
}

// Tooltip text + icon color for the status cell. A real probe error (lastError)
// is a warning and takes precedence; otherwise an Xray-core problem shows purple.
function statusIssue(record: Pick<NodeRecord, 'status' | 'xrayState' | 'xrayError' | 'lastError'>) {
  const tip =
    record.lastError ||
    (hasXrayProblem(record.status, record.xrayState) ? record.xrayError : '') ||
    '';
  const iconColor =
    !record.lastError && hasXrayProblem(record.status, record.xrayState)
      ? XRAY_ERROR_COLOR
      : 'var(--ant-color-warning)';
  return { tip, iconColor };
}

function StatusDot({ status, xrayState }: HealthProps) {
  if (status === 'online') {
    return hasXrayProblem(status, xrayState) ? (
      <span className="xray-error-dot" />
    ) : (
      <span className="online-dot" />
    );
  }
  return <Badge status={badgeStatus(status)} />;
}

function StatusLabel({ status, xrayState }: HealthProps) {
  const { t } = useTranslation();
  if (status === 'online') {
    const xs = (xrayState || '').toLowerCase().trim();
    if (xs === 'error' || xs === 'stop') {
      const detail =
        xs === 'error'
          ? t('pages.nodes.statusValues.xrayError')
          : t('pages.nodes.statusValues.xrayStopped');
      return (
        <span style={{ color: XRAY_ERROR_COLOR }}>
          {t('pages.nodes.statusValues.online')} ({detail})
        </span>
      );
    }
    return (
      <span style={{ color: 'var(--ant-color-success)' }}>
        {t('pages.nodes.statusValues.online')}
      </span>
    );
  }
  return <span>{t(`pages.nodes.statusValues.${status || 'unknown'}`)}</span>;
}

function formatPct(p?: number): string {
  if (typeof p !== 'number' || Number.isNaN(p)) return '-';
  return `${p.toFixed(1)}%`;
}

function formatUptime(secs?: number): string {
  if (!secs) return '-';
  const days = Math.floor(secs / 86400);
  const hours = Math.floor((secs % 86400) / 3600);
  if (days > 0) return `${days}d ${hours}h`;
  const mins = Math.floor((secs % 3600) / 60);
  if (hours > 0) return `${hours}h ${mins}m`;
  return `${mins}m`;
}

function useRelativeTime() {
  const { t } = useTranslation();
  return (unixSeconds?: number) => {
    if (!unixSeconds) return t('pages.nodes.never');
    const diffSec = Math.max(0, Math.floor(Date.now() / 1000 - unixSeconds));
    if (diffSec < 5) return t('pages.nodes.justNow');
    if (diffSec < 60) return `${diffSec}s`;
    if (diffSec < 3600) return `${Math.floor(diffSec / 60)}m`;
    if (diffSec < 86400) return `${Math.floor(diffSec / 3600)}h`;
    return `${Math.floor(diffSec / 86400)}d`;
  };
}

export default function NodeList({
  nodes,
  loading = false,
  isMobile = false,
  latestVersion = '',
  selectedIds,
  onSelectionChange,
  onAdd,
  onMtls,
  onProbeTasks,
  onEdit,
  onDelete,
  onProbe,
  onToggleEnable,
  onUpdateNode,
  onUpdateSelected,
}: NodeListProps) {
  const { t } = useTranslation();
  const relativeTime = useRelativeTime();

  const [showAddress, setShowAddress] = useState(false);
  const [statsNode, setStatsNode] = useState<NodeRow | null>(null);
  const [expandedIds, setExpandedIds] = useState<Set<number>>(new Set());

  // Map a node GUID to its display name so a transitive sub-node can show which
  // parent it is reached through (#4983).
  const nameByGuid = useMemo(() => {
    const m = new Map<string, string>();
    for (const n of nodes) if (n.guid) m.set(n.guid, n.name || n.guid);
    return m;
  }, [nodes]);

  // Order direct nodes first, each immediately followed by its transitive
  // sub-nodes, so the table reads as a parent -> child tree without colliding
  // with the per-row history expander (transitive nodes carry id 0).
  const dataSource = useMemo<NodeRow[]>(() => {
    const toRow = (n: NodeRecord): NodeRow => ({
      ...n,
      url: `${n.scheme}://${n.address}:${n.port}${n.basePath || '/'}`,
      key: n.transitive ? `t-${n.guid || ''}` : n.id,
    });
    const childrenByParent = new Map<string, NodeRecord[]>();
    for (const n of nodes) {
      if (n.transitive && n.parentGuid) {
        const arr = childrenByParent.get(n.parentGuid) || [];
        arr.push(n);
        childrenByParent.set(n.parentGuid, arr);
      }
    }
    const ordered: NodeRow[] = [];
    const added = new Set<string>();
    const push = (n: NodeRecord) => {
      const row = toRow(n);
      ordered.push(row);
      added.add(String(row.key));
    };
    for (const n of nodes) {
      if (n.transitive) continue;
      push(n);
      if (n.guid) for (const child of childrenByParent.get(n.guid) || []) push(child);
    }
    // Transitive nodes whose parent isn't in the list still get shown.
    for (const n of nodes) {
      if (n.transitive && !added.has(`t-${n.guid || ''}`)) push(n);
    }
    return ordered;
  }, [nodes]);

  function toggleExpanded(id: number) {
    setExpandedIds((prev) => {
      const next = new Set(prev);
      if (next.has(id)) next.delete(id);
      else next.add(id);
      return next;
    });
  }

  const columns = useMemo<ColumnsType<NodeRow>>(
    () => [
      {
        title: t('pages.nodes.actions'),
        align: 'center',
        width: 150,
        render: (_value, record) =>
          record.transitive ? (
            <Tooltip
              title={t('pages.nodes.subNodeTip', {
                parent: record.parentGuid ? nameByGuid.get(record.parentGuid) || '-' : '-',
              })}
            >
              <Tag icon={<ApartmentOutlined />} style={{ margin: 0 }}>
                {t('pages.nodes.subNode')}
              </Tag>
            </Tooltip>
          ) : (
            <Space>
              <Tooltip title={t('pages.nodes.probe')}>
                <Button
                  type="text"
                  size="small"
                  style={{ fontSize: 16 }}
                  icon={<ThunderboltOutlined />}
                  aria-label={t('pages.nodes.probe')}
                  onClick={() => onProbe(record)}
                />
              </Tooltip>
              {isUpdateEligible(record) && (
                <Tooltip
                  title={t(
                    record.nodeType === 'agent'
                      ? 'pages.nodes.updateAgent'
                      : 'pages.nodes.updatePanel',
                  )}
                >
                  <Button
                    type="text"
                    size="small"
                    style={{ fontSize: 16 }}
                    icon={<CloudDownloadOutlined />}
                    aria-label={t(
                      record.nodeType === 'agent'
                        ? 'pages.nodes.updateAgent'
                        : 'pages.nodes.updatePanel',
                    )}
                    onClick={() => onUpdateNode(record)}
                  />
                </Tooltip>
              )}
              <Tooltip title={t('edit')}>
                <Button
                  type="text"
                  size="small"
                  style={{ fontSize: 16 }}
                  icon={<EditOutlined />}
                  aria-label={t('edit')}
                  onClick={() => onEdit(record)}
                />
              </Tooltip>
              <Tooltip title={t('delete')}>
                <Button
                  type="text"
                  size="small"
                  danger
                  style={{ fontSize: 16 }}
                  icon={<DeleteOutlined />}
                  aria-label={t('delete')}
                  onClick={() => onDelete(record)}
                />
              </Tooltip>
            </Space>
          ),
      },
      {
        title: t('pages.nodes.enable'),
        dataIndex: 'enable',
        align: 'center',
        width: 64,
        render: (_value, record) =>
          record.transitive ? (
            <span style={{ opacity: 0.4 }}>—</span>
          ) : (
            <Switch
              checked={!!record.enable}
              size="small"
              onChange={(v) => onToggleEnable(record, v)}
            />
          ),
      },
      {
        title: t('pages.nodes.name'),
        dataIndex: 'name',
        ellipsis: true,
        render: (_value, record) => (
          <div
            className="name-cell"
            style={record.transitive ? { paddingInlineStart: 20 } : undefined}
          >
            <span className="name">
              {record.transitive && (
                <ApartmentOutlined style={{ marginInlineEnd: 6, opacity: 0.6 }} />
              )}
              {record.name}
            </span>
            {record.remark && <span className="remark">{record.remark}</span>}
          </div>
        ),
      },
      {
        title: (
          <span className="address-header">
            {t('pages.nodes.address')}
            <Tooltip title={t('pages.index.toggleIpVisibility')}>
              {showAddress ? (
                <EyeOutlined
                  className="ip-toggle-icon"
                  role="button"
                  tabIndex={0}
                  aria-label={t('pages.index.toggleIpVisibility')}
                  onClick={() => setShowAddress(false)}
                  onKeyDown={activateOnKey(() => setShowAddress(false))}
                />
              ) : (
                <EyeInvisibleOutlined
                  className="ip-toggle-icon"
                  role="button"
                  tabIndex={0}
                  aria-label={t('pages.index.toggleIpVisibility')}
                  onClick={() => setShowAddress(true)}
                  onKeyDown={activateOnKey(() => setShowAddress(true))}
                />
              )}
            </Tooltip>
          </span>
        ),
        dataIndex: 'url',
        width: 330,
        ellipsis: true,
        render: (_value, record) => {
          if (record.nodeType === 'agent') {
            // Agent nodes have no panel to link to: show the host IPs the
            // agent reports with its heartbeat as plain text on one line
            // (P13, layout per item 21).
            const ips = [record.ipv4, record.ipv6].filter(Boolean) as string[];
            return (
              <span className={showAddress ? 'address-visible' : 'address-hidden'}>
                {ips.length > 0
                  ? ips.map((ip, i) => (
                      <span key={ip}>
                        {i > 0 && <span style={{ opacity: 0.45 }}> · </span>}
                        {ip}
                      </span>
                    ))
                  : '-'}
              </span>
            );
          }
          return (
            <a
              href={record.url}
              target="_blank"
              rel="noopener noreferrer"
              className={showAddress ? 'address-visible' : 'address-hidden'}
            >
              {record.url}
            </a>
          );
        },
      },
      {
        title: t('pages.nodes.status'),
        dataIndex: 'status',
        align: 'center',
        render: (_value, record) => {
          const { tip, iconColor } = statusIssue(record);
          return (
            <Space size={4}>
              <StatusDot status={record.status} xrayState={record.xrayState} />
              <StatusLabel status={record.status} xrayState={record.xrayState} />
              {tip && (
                <Tooltip title={tip}>
                  <ExclamationCircleOutlined style={{ color: iconColor }} />
                </Tooltip>
              )}
            </Space>
          );
        },
      },
      {
        title: t('pages.nodes.cpu'),
        dataIndex: 'cpuPct',
        align: 'center',
        width: 90,
        render: (_value, record) => formatPct(record.cpuPct),
      },
      {
        title: t('pages.nodes.mem'),
        dataIndex: 'memPct',
        align: 'center',
        width: 90,
        render: (_value, record) => formatPct(record.memPct),
      },
      {
        // Core version (V2.0.1 ②): agent rows run sing-box and show
        // its version; traditional rows keep showing the xray one.
        // Probe-only agent rows (V2.1.0) run no core by design: the
        // cell says so instead of a bare '-', which reads as a fault.
        title: t('pages.nodes.coreVersion'),
        dataIndex: 'xrayVersion',
        align: 'center',
        render: (_value, record) =>
          record.nodeType === 'agent'
            ? record.probeOnly
              ? (
                  <Tag color="cyan" style={{ margin: 0 }}>
                    {t('pages.nodes.probeOnly')}
                  </Tag>
                )
              : record.singboxVersion || record.xrayVersion || '-'
            : record.xrayVersion || '-',
      },
      {
        title: t('pages.nodes.panelVersion') || 'Panel version',
        dataIndex: 'panelVersion',
        align: 'center',
        render: (_value, record) => {
          // Agent rows carry the A-series display version ("A1.0.0"), not
          // an upstream panel version: the update badge must never light
          // up for them (the version comparator falls back to string
          // inequality for unparseable versions, which would always
          // differ) (P13, item 18).
          const canUpdate =
            record.nodeType !== 'agent' &&
            isUpdateEligible(record) &&
            isPanelUpdateAvailable(latestVersion, record.panelVersion || '');
          return (
            <Space size={4}>
              <span>{record.panelVersion || '-'}</span>
              {canUpdate && (
                <Tooltip title={`${t('pages.nodes.updateAvailable')}: ${latestVersion}`}>
                  <Tag
                    color="orange"
                    style={{ margin: 0, cursor: 'pointer' }}
                    role="button"
                    tabIndex={0}
                    onClick={() => onUpdateNode(record)}
                    onKeyDown={activateOnKey(() => onUpdateNode(record))}
                  >
                    {t('pages.nodes.updateAvailable')}
                  </Tag>
                </Tooltip>
              )}
            </Space>
          );
        },
      },
      {
        title: t('pages.nodes.uptime'),
        dataIndex: 'uptimeSecs',
        align: 'center',
        render: (_value, record) => formatUptime(record.uptimeSecs),
      },
      {
        title: t('clients'),
        align: 'center',
        width: 150,
        render: (_value, record) => (
          <Space size={2}>
            <Tag className="client-count-tag" style={{ margin: 0, padding: '0 2px' }}>
              <TeamOutlined /> {record.clientCount || 0}
            </Tag>
            {record.activeCount ? (
              <CategoryChip
                title={t('subscription.active')}
                emails={record.activeEmails}
                color="green"
                count={record.activeCount}
              />
            ) : null}
            {record.disabledCount ? (
              <CategoryChip
                title={t('disabled')}
                emails={record.disabledEmails}
                count={record.disabledCount}
              />
            ) : null}
            {record.depletedCount ? (
              <CategoryChip
                title={t('depleted')}
                emails={record.depletedEmails}
                color="red"
                count={record.depletedCount}
              />
            ) : null}
            {record.onlineCount ? (
              <CategoryChip
                title={t('online')}
                emails={record.onlineEmails}
                color="blue"
                count={record.onlineCount}
              />
            ) : null}
          </Space>
        ),
      },
      {
        title: t('pages.nodes.latency'),
        dataIndex: 'latencyMs',
        align: 'center',
        width: 84,
        render: (_value, record) =>
          record.latencyMs && record.latencyMs > 0 ? `${record.latencyMs} ms` : '-',
      },
      {
        title: t('pages.nodes.lastHeartbeat'),
        dataIndex: 'lastHeartbeat',
        align: 'center',
        width: 96,
        render: (_value, record) => relativeTime(record.lastHeartbeat),
      },
    ],
    [
      t,
      showAddress,
      relativeTime,
      latestVersion,
      onToggleEnable,
      onProbe,
      onEdit,
      onDelete,
      onUpdateNode,
      nameByGuid,
    ],
  );

  return (
    <Card size="small" hoverable>
      <div className="toolbar">
        <Button type="primary" icon={<PlusOutlined />} onClick={onAdd}>
          {t('pages.nodes.addNode')}
        </Button>
        <Button icon={<SafetyCertificateOutlined />} onClick={onMtls}>
          {t('pages.nodes.mtls.title')}
        </Button>
        <Button icon={<RadarChartOutlined />} onClick={onProbeTasks}>
          {t('pages.nodes.probeTasks.title')}
        </Button>
        {selectedIds.length > 0 && (
          <Button icon={<CloudDownloadOutlined />} onClick={onUpdateSelected}>
            {t('pages.nodes.updateSelected', { count: selectedIds.length })}
          </Button>
        )}
      </div>

      {isMobile ? (
        <>
          <div className="node-cards">
            {dataSource.length === 0 ? (
              <div className="card-empty">
                <ClusterOutlined style={{ fontSize: 28, opacity: 0.5 }} />
                <div>{t('noData')}</div>
              </div>
            ) : (
              dataSource.map((record) =>
                record.transitive ? (
                  <div
                    key={String(record.key)}
                    className="node-card"
                    style={{ paddingInlineStart: 16, opacity: 0.85 }}
                  >
                    <div className="card-head">
                      <ApartmentOutlined style={{ opacity: 0.6 }} />
                      <StatusDot status={record.status} xrayState={record.xrayState} />
                      <span className="node-name">{record.name}</span>
                      <div className="card-actions">
                        <Tag icon={<ApartmentOutlined />} style={{ margin: 0 }}>
                          {t('pages.nodes.subNode')}
                        </Tag>
                      </div>
                    </div>
                  </div>
                ) : (
                  <div key={record.id} className="node-card">
                    {/* eslint-disable-next-line jsx-a11y/no-static-element-interactions, jsx-a11y/click-events-have-key-events -- mouse click-to-expand mirrors the keyboard-accessible chevron disclosure button */}
                    <div
                      className="card-head"
                      onClick={(e) => {
                        if (!(e.target as HTMLElement).closest('.card-actions'))
                          toggleExpanded(record.id);
                      }}
                    >
                      <RightOutlined
                        className={`card-expand${expandedIds.has(record.id) ? ' is-expanded' : ''}`}
                        role="button"
                        tabIndex={0}
                        aria-expanded={expandedIds.has(record.id)}
                        aria-label={record.name}
                        onKeyDown={activateOnKey(() => toggleExpanded(record.id))}
                      />
                      <StatusDot status={record.status} xrayState={record.xrayState} />
                      <span className="node-name">{record.name}</span>
                      <div className="card-actions">
                        <Tooltip title={t('info')}>
                          <InfoCircleOutlined
                            className="row-action-trigger"
                            role="button"
                            tabIndex={0}
                            aria-label={t('info')}
                            onClick={() => setStatsNode(record)}
                            onKeyDown={activateOnKey(() => setStatsNode(record))}
                          />
                        </Tooltip>
                        <Switch
                          checked={!!record.enable}
                          size="small"
                          onChange={(v) => onToggleEnable(record, v)}
                        />
                        <Dropdown
                          trigger={['click']}
                          placement="bottomRight"
                          menu={{
                            items: [
                              {
                                key: 'probe',
                                label: (
                                  <>
                                    <ThunderboltOutlined /> {t('pages.nodes.probe')}
                                  </>
                                ),
                                onClick: () => onProbe(record),
                              },
                              ...(isUpdateEligible(record)
                                ? [
                                    {
                                      key: 'update',
                                      label: (
                                        <>
                                          <CloudDownloadOutlined />{' '}
                                          {t(
                                            record.nodeType === 'agent'
                                              ? 'pages.nodes.updateAgent'
                                              : 'pages.nodes.updatePanel',
                                          )}
                                        </>
                                      ),
                                      onClick: () => onUpdateNode(record),
                                    },
                                  ]
                                : []),
                              {
                                key: 'edit',
                                label: (
                                  <>
                                    <EditOutlined /> {t('edit')}
                                  </>
                                ),
                                onClick: () => onEdit(record),
                              },
                              {
                                key: 'delete',
                                danger: true,
                                label: (
                                  <>
                                    <DeleteOutlined /> {t('delete')}
                                  </>
                                ),
                                onClick: () => onDelete(record),
                              },
                            ],
                          }}
                        >
                          <Button
                            type="text"
                            size="small"
                            className="row-action-trigger"
                            icon={<MoreOutlined />}
                            aria-label={t('more')}
                          />
                        </Dropdown>
                      </div>
                    </div>

                    {expandedIds.has(record.id) && (
                      <div className="card-history">
                        <NodeHistoryPanel node={record} />
                      </div>
                    )}
                  </div>
                ),
              )
            )}
          </div>

          <Modal
            open={!!statsNode}
            footer={null}
            width={360}
            centered
            title={statsNode?.name || ''}
            onCancel={() => setStatsNode(null)}
          >
            {statsNode && (
              <div className="card-stats">
                {statsNode.remark && (
                  <div className="stat-row">
                    <span className="stat-label">{t('pages.nodes.name')}</span>
                    <span>{statsNode.remark}</span>
                  </div>
                )}
                <div className="stat-row">
                  <span className="stat-label">{t('pages.nodes.address')}</span>
                  <a
                    href={statsNode.url}
                    target="_blank"
                    rel="noopener noreferrer"
                    className={showAddress ? 'address-visible' : 'address-hidden'}
                  >
                    {statsNode.url}
                  </a>
                  <Tooltip title={t('pages.index.toggleIpVisibility')}>
                    {showAddress ? (
                      <EyeOutlined
                        className="ip-toggle-icon"
                        role="button"
                        tabIndex={0}
                        aria-label={t('pages.index.toggleIpVisibility')}
                        onClick={() => setShowAddress(false)}
                        onKeyDown={activateOnKey(() => setShowAddress(false))}
                      />
                    ) : (
                      <EyeInvisibleOutlined
                        className="ip-toggle-icon"
                        role="button"
                        tabIndex={0}
                        aria-label={t('pages.index.toggleIpVisibility')}
                        onClick={() => setShowAddress(true)}
                        onKeyDown={activateOnKey(() => setShowAddress(true))}
                      />
                    )}
                  </Tooltip>
                </div>
                <div className="stat-row">
                  <span className="stat-label">{t('pages.nodes.status')}</span>
                  <StatusDot status={statsNode.status} xrayState={statsNode.xrayState} />
                  <StatusLabel status={statsNode.status} xrayState={statsNode.xrayState} />
                  {(() => {
                    const { tip, iconColor } = statusIssue(statsNode);
                    return tip ? (
                      <Tooltip title={tip}>
                        <ExclamationCircleOutlined style={{ color: iconColor }} />
                      </Tooltip>
                    ) : null;
                  })()}
                </div>
                <div className="stat-row">
                  <span className="stat-label">{t('pages.nodes.cpu')}</span>
                  <Tag>{formatPct(statsNode.cpuPct)}</Tag>
                </div>
                <div className="stat-row">
                  <span className="stat-label">{t('pages.nodes.mem')}</span>
                  <Tag>{formatPct(statsNode.memPct)}</Tag>
                </div>
                <div className="stat-row">
                  <span className="stat-label">{t('pages.nodes.coreVersion')}</span>
                  <Tag>
                    {statsNode.nodeType === 'agent'
                      ? statsNode.singboxVersion || statsNode.xrayVersion || '-'
                      : statsNode.xrayVersion || '-'}
                  </Tag>
                </div>
                <div className="stat-row">
                  <span className="stat-label">
                    {t('pages.nodes.panelVersion') || 'Panel version'}
                  </span>
                  <Tag>{statsNode.panelVersion || '-'}</Tag>
                </div>
                <div className="stat-row">
                  <span className="stat-label">{t('pages.nodes.uptime')}</span>
                  <Tag>{formatUptime(statsNode.uptimeSecs)}</Tag>
                </div>
                <div className="stat-row">
                  <span className="stat-label">{t('pages.nodes.latency')}</span>
                  <Tag>
                    {statsNode.latencyMs && statsNode.latencyMs > 0
                      ? `${statsNode.latencyMs} ms`
                      : '-'}
                  </Tag>
                </div>
                <div className="stat-row">
                  <span className="stat-label">{t('clients')}</span>
                  <Tag>
                    <TeamOutlined /> {statsNode.clientCount || 0}
                  </Tag>
                  {statsNode.activeCount ? (
                    <Tag color="green">
                      {statsNode.activeCount} {t('subscription.active')}
                    </Tag>
                  ) : null}
                  {statsNode.disabledCount ? (
                    <Tag>
                      {statsNode.disabledCount} {t('disabled')}
                    </Tag>
                  ) : null}
                  {statsNode.depletedCount ? (
                    <Tag color="red">
                      {statsNode.depletedCount} {t('depleted')}
                    </Tag>
                  ) : null}
                  {statsNode.onlineCount ? (
                    <Tag color="blue">
                      {statsNode.onlineCount} {t('online')}
                    </Tag>
                  ) : null}
                </div>
                <div className="stat-row">
                  <span className="stat-label">{t('pages.nodes.lastHeartbeat')}</span>
                  <Tag>{relativeTime(statsNode.lastHeartbeat)}</Tag>
                </div>
              </div>
            )}
          </Modal>
        </>
      ) : (
        <Table<NodeRow>
          dataSource={dataSource}
          columns={columns}
          pagination={false}
          loading={loading}
          scroll={{ x: 'max-content' }}
          size="middle"
          rowKey="key"
          rowSelection={
            dataSource.length > 1
              ? {
                  selectedRowKeys: selectedIds,
                  onChange: (keys) =>
                    onSelectionChange(keys.filter((k) => typeof k === 'number') as number[]),
                  getCheckboxProps: (record) => ({
                    disabled: !!record.transitive || !isUpdateEligible(record),
                  }),
                }
              : undefined
          }
          locale={{
            emptyText: (
              <div className="card-empty">
                <ClusterOutlined style={{ fontSize: 32, marginBottom: 8 }} />
                <div>{t('noData')}</div>
              </div>
            ),
          }}
          expandable={{
            expandedRowRender: (record) => <NodeHistoryPanel node={record} />,
            rowExpandable: (record) => !record.transitive,
          }}
        />
      )}
    </Card>
  );
}