// 主机监控详情 — 阿里云云监控风格 + v2.0 新增指标
// 进程TOP / Swap / FD / 上下文切换 // Logan.Li
import { useState, useEffect, useMemo, useRef } from 'react';
import { useSearchParams } from 'react-router-dom';
import { useQueryClient } from '@tanstack/react-query';
import { agentApi } from '@/api';
import { useHostList, useHostHistory, usePortPolicy } from '@/hooks/api/useHostMonitor';
import { queryKeys } from '@/hooks/api/queryKeys';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
import { PageShell } from '@/components/layout/PageShell';
import { PageLoading } from '@/components/layout/PageLoading';
import { Monitor, HardDrive, Network, Server, Info, List, HeartPulse } from 'lucide-react';
import type { ZoomableChartHandle } from './host-monitor/ZoomableAreaChart';
import { DEFAULT_TIME_RANGE, PCT_REF_LINES, type AggType, type HostRecord, type HostMonitorTimeRange } from './host-monitor/types';
import { HostTimeRangePicker } from './host-monitor/HostTimeRangePicker';
import { getRangeSpanMinutes } from './host-monitor/timeRange';
import { parseJSON, buildMetricsFromHistory, getCurrentVal, filterHistoryByRange, getActualDataSpan } from './host-monitor/utils';
import { HealthProbeSection } from './host-monitor/HealthProbeSection';
import { PortPolicyDialog } from './host-monitor/PortPolicyDialog';
import { SystemInfoSection } from './host-monitor/SystemInfoSection';
import { HostCoreMetricsStrip } from './host-monitor/HostCoreMetricsStrip';
import { BasicTab } from './host-monitor/tabs/BasicTab';
import { DiskTab } from './host-monitor/tabs/DiskTab';
import { NetworkTab } from './host-monitor/tabs/NetworkTab';
import { PortMonitorTab } from './host-monitor/tabs/PortMonitorTab';
import { ProcessTab } from './host-monitor/tabs/ProcessTab';
import type { JsonData } from '@/types/common';
import i18n from '@/i18n';

const TABS = [
  { id: 'basic', label: i18n.t('基础监控'), icon: <Monitor className="w-3.5 h-3.5" /> },
  { id: 'disk', label: i18n.t('磁盘监控'), icon: <HardDrive className="w-3.5 h-3.5" /> },
  { id: 'network', label: i18n.t('网络监控'), icon: <Network className="w-3.5 h-3.5" /> },
  { id: 'ports', label: i18n.t('agent.portMonitor'), icon: <Server className="w-3.5 h-3.5" /> },
  { id: 'process', label: i18n.t('monitor.hostProcess'), icon: <List className="w-3.5 h-3.5" /> },
  { id: 'system', label: i18n.t('system.systemInfo'), icon: <Info className="w-3.5 h-3.5" /> },
  { id: 'health_probes', label: i18n.t('kubernetes.container.probes'), icon: <HeartPulse className="w-3.5 h-3.5" /> },
];

export function HostMonitor({ embedded = false }: { embedded?: boolean }) {
  const qc = useQueryClient();
  const [searchParams] = useSearchParams();
  const urlHost = searchParams.get('host') || '';
  const [selectedHost, setSelectedHost] = useState(urlHost);
  const [activeTab, setActiveTab] = useState('basic');
  const [timeRange, setTimeRange] = useState<HostMonitorTimeRange>(DEFAULT_TIME_RANGE);
  const [aggType, setAggType] = useState<AggType>('avg');

  const [portPolicyMode, setPortPolicyMode] = useState('whitelist');
  const [portWhitelist, setPortWhitelist] = useState<number[]>([]);
  const [portPolicyDialogOpen, setPortPolicyDialogOpen] = useState(false);
  const [portPolicySaving, setPortPolicySaving] = useState(false);
  const fdChartRef = useRef<ZoomableChartHandle>(null);
  const [fdChartZoomed, setFdChartZoomed] = useState(false);

  const { data: hosts = [], isLoading: hostsLoading } = useHostList();
  const { data: rawHistory = [], isLoading: historyLoading } = useHostHistory(selectedHost, timeRange);
  const { data: portPolicy, refetch: refetchPortPolicy } = usePortPolicy(selectedHost);

  useEffect(() => {
    if (portPolicy) {
      setPortPolicyMode(portPolicy.port_filter_mode);
      setPortWhitelist(portPolicy.port_whitelist);
    }
  }, [portPolicy]);

  useEffect(() => {
    if (hosts.length > 0 && !selectedHost) {
      const m = urlHost ? hosts.find((h) => h.hostname === urlHost) : null;
      setSelectedHost(String(m?.hostname || hosts[0]?.hostname || ''));
    }
  }, [hosts, selectedHost, urlHost]);

  const handleSavePortPolicy = async () => {
    if (!selectedHost) return;
    setPortPolicySaving(true);
    try {
      await agentApi.savePortPolicy(selectedHost, {
        port_filter_mode: portPolicyMode,
        port_whitelist: portWhitelist,
      });
      setPortPolicyDialogOpen(false);
      qc.invalidateQueries({ queryKey: queryKeys.hostMonitor.portPolicy(selectedHost) });
    } catch {
      // 保存失败时保持弹窗状态，错误由调用方统一处理。// Logan.Li
    } finally { setPortPolicySaving(false); }
  };

  const history = useMemo(() => filterHistoryByRange(rawHistory, timeRange), [rawHistory, timeRange]);
  const spanMinutes = getRangeSpanMinutes(timeRange);
  const timeConfig = useMemo(() => ({ buckets: timeRange.buckets, spanMinutes }), [timeRange.buckets, spanMinutes]);
  const actualDataSpan = useMemo(() => getActualDataSpan(history, timeRange), [history, timeRange]);
  const loading = hostsLoading || historyLoading;
  const serverInfo = (hosts.find((h) => h.hostname === selectedHost) || null) as HostRecord | null;
  const latest = useMemo((): HostRecord => {
    const base = serverInfo || {};
    if (history.length === 0) return base;
    return { ...base, ...(history[history.length - 1] as HostRecord) };
  }, [serverInfo, history]);

  const metrics = useMemo(() => buildMetricsFromHistory(history, timeConfig), [history, timeConfig]);

  const netInfo = parseJSON(latest?.net_info);
  const portInfo: JsonData[] = Array.isArray(latest?.port_info) ? latest.port_info as JsonData[] : (Array.isArray(parseJSON(latest?.port_info)) ? parseJSON(latest?.port_info) as unknown as JsonData[] : []);
  const diskIOInfo = parseJSON(latest?.disk_io_info);
  const swapInfo = parseJSON(latest?.swap_info);
  const processTop: JsonData[] = Array.isArray(parseJSON(latest?.process_top_info)) ? parseJSON(latest?.process_top_info) as unknown as JsonData[] : [];
  const fdInfo = parseJSON(latest?.fd_info);
  const csInfo = parseJSON(latest?.cs_info);
  const heartbeatInfo = parseJSON(latest?.heartbeat_info);

  const currentVal = (key: string, fallback = '--') =>
    getCurrentVal(latest, netInfo, diskIOInfo, swapInfo, fdInfo, key, fallback);

  const toolbar = (
    <div className="flex items-center justify-between flex-wrap gap-2 w-full">
      <div className="flex items-center gap-2">
        <Select value={selectedHost} onValueChange={setSelectedHost}>
          <SelectTrigger className="w-52 h-8 text-xs dg-input">
            <SelectValue placeholder={i18n.t('选择主机...')} />
          </SelectTrigger>
          <SelectContent className="dg-input">
            {hosts.map((h: JsonData) => (
              <SelectItem key={h.hostname} value={h.hostname}>{h.hostname}</SelectItem>
            ))}
          </SelectContent>
        </Select>
        {serverInfo && (
          <span className="text-xs dg-text-muted">
            {String(serverInfo.os || '')}{serverInfo.cpu_cores ? ` | ${serverInfo.cpu_cores as number | string} ${i18n.t('monitor.hostMonitorPanel.cores')}` : ''}{serverInfo.mem_total ? ` | ${(serverInfo.mem_total as number).toFixed(0)}GB` : ''}
          </span>
        )}
      </div>
      <div className="flex items-center gap-2">
        <Select value={aggType} onValueChange={(v) => setAggType(v as AggType)}>
          <SelectTrigger className="w-24 h-7 text-xs dg-input"><SelectValue /></SelectTrigger>
          <SelectContent className="dg-input">
            <SelectItem value="avg"> {i18n.t('选择主机...')} </SelectItem>
            <SelectItem value="max"> {i18n.t('选择主机...')} </SelectItem>
            <SelectItem value="min"> {i18n.t('选择主机...')} </SelectItem>
          </SelectContent>
        </Select>
        <div className="flex flex-col items-end gap-0.5">
          <HostTimeRangePicker value={timeRange} onChange={setTimeRange} />
          {actualDataSpan && (
            <span className="text-[10px] dg-text-muted tabular-nums">{i18n.t('monitor.hostMonitorPanel.dataSpan', { span: actualDataSpan })}</span>
          )}
        </div>
      </div>
    </div>
  );

  const monitorBody = (
    <Tabs value={activeTab} onValueChange={setActiveTab}>
      <TabsList className="h-8 bg-[var(--dg-bg-secondary)] border-[var(--dg-border)] gap-0 overflow-x-auto">
        {TABS.map(tab => (
          <TabsTrigger key={tab.id} value={tab.id} className="text-[11px] h-7 gap-1.5 px-3 data-[state=active]:bg-[var(--dg-bg-primary)]">
            <span className="shrink-0 opacity-80">{tab.icon}</span>
            {tab.label}
          </TabsTrigger>
        ))}
      </TabsList>

      <TabsContent value="basic" className="mt-3">
        <BasicTab metrics={metrics} latest={latest} currentVal={currentVal} aggType={aggType} pctRefLines={PCT_REF_LINES} />
      </TabsContent>

      <TabsContent value="disk" className="mt-3">
        <DiskTab metrics={metrics} latest={latest} currentVal={currentVal} aggType={aggType} pctRefLines={PCT_REF_LINES} diskIOInfo={diskIOInfo} />
      </TabsContent>

      <TabsContent value="network" className="mt-3">
        <NetworkTab metrics={metrics} netInfo={netInfo} currentVal={currentVal} aggType={aggType} />
      </TabsContent>

      <TabsContent value="ports" className="mt-3">
        <PortMonitorTab portInfo={portInfo} portPolicyMode={portPolicyMode} portWhitelist={portWhitelist}
          onOpenPortPolicy={() => { refetchPortPolicy(); setPortPolicyDialogOpen(true); }} />
      </TabsContent>

      <TabsContent value="process" className="mt-3">
        <ProcessTab processTop={processTop} fdInfo={fdInfo} csInfo={csInfo} fdMetrics={metrics.fd}
          aggType={aggType} fdChartRef={fdChartRef} fdChartZoomed={fdChartZoomed} setFdChartZoomed={setFdChartZoomed} />
      </TabsContent>

      <SystemInfoSection selectedHost={selectedHost} serverInfo={serverInfo} latest={latest}
        heartbeatInfo={heartbeatInfo} portInfoCount={portInfo.length} />

      <HealthProbeSection selectedHost={selectedHost} />
    </Tabs>
  );

  const dialogs = (
    <PortPolicyDialog open={portPolicyDialogOpen} onOpenChange={setPortPolicyDialogOpen}
      portPolicyMode={portPolicyMode} onModeChange={setPortPolicyMode}
      portWhitelist={portWhitelist} onWhitelistChange={setPortWhitelist}
      onSave={handleSavePortPolicy} saving={portPolicySaving} />
  );

  if (embedded) {
    return (
      <div className="space-y-3">
        {toolbar}
        {!loading && history.length > 0 && (
          <HostCoreMetricsStrip latest={latest} netInfo={netInfo} diskIOInfo={diskIOInfo} onJump={setActiveTab} />
        )}
        {loading && !history.length ? <PageLoading /> : monitorBody}
        {dialogs}
      </div>
    );
  }

  return (
    <PageShell variant="workspace" title={i18n.t('monitor.alertRulesTab.catHost')}
      subtitle={selectedHost ? `当前主机: ${selectedHost}` : i18n.t('选择主机查看监控指标')}
      icon={<Server className="h-5 w-5" />} toolbar={toolbar}
      loading={loading && !history.length} loadingLabel={i18n.t('monitor.hostmonitortsx.sc23e802e')}
      contentClassName="space-y-3">
      {monitorBody}
      {dialogs}
    </PageShell>
  );
}