import { useState, useEffect, useMemo } from 'react';
import { useTranslation } from 'react-i18next';
import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
import { Cloud, XCircle } from 'lucide-react';
import { kubernetesApi } from '@/api';
import type { JsonData } from '@/types/common';
import { computeClusterMetrics, buildTrendData } from './cluster-detail/types';
import { OverviewTab } from './cluster-detail/OverviewTab';
import { NodesTab } from './cluster-detail/NodesTab';
import { PodsTab } from './cluster-detail/PodsTab';
import { DeploymentsTab } from './cluster-detail/DeploymentsTab';
import { ServicesTab } from './cluster-detail/ServicesTab';
import { IngressesTab } from './cluster-detail/IngressesTab';
import { EventsTab } from './cluster-detail/EventsTab';

export function KubernetesClusterDetail({ cluster, onClose }: { cluster?: JsonData; onClose: () => void }) {
  const { t } = useTranslation();
  const [nodes, setNodes] = useState<JsonData[]>([]);
  const [pods, setPods] = useState<JsonData[]>([]);
  const [deployments, setDeployments] = useState<JsonData[]>([]);
  const [services, setServices] = useState<JsonData[]>([]);
  const [ingresses, setIngresses] = useState<JsonData[]>([]);

  // 从节点数据计算集群级 CPU/内存使用率（实时快照）
  const clusterMetrics = useMemo(() => computeClusterMetrics(nodes), [nodes]);

  // 构造趋势数据（多点），避免单点导致"光点"效果
  const trendData = useMemo(() => buildTrendData(clusterMetrics, t), [clusterMetrics, t]);

  const loadClusterDetail = async (clusterCode: string) => {
    try {
      // 后端 ListNodes/ListPods/etc 返回 data 直接为数组（非 {list,total}）
      // 统一使用 Kuboard code 路由 (ROADMAP A1)
      const [nodesRes, podsRes, depRes, svcRes, ingRes] = await Promise.all([
        kubernetesApi.getNodes(clusterCode).catch(() => []),
        kubernetesApi.getPods(clusterCode).catch(() => []),
        kubernetesApi.getDeployments(clusterCode).catch(() => []),
        kubernetesApi.getServices(clusterCode).catch(() => []),
        kubernetesApi.getIngresses(clusterCode).catch(() => []),
      ]);
      const toArray = (v: JsonData) => (Array.isArray(v) ? v : (v?.list || []));
      setNodes(toArray(nodesRes));
      setPods(toArray(podsRes));
      setDeployments(toArray(depRes));
      setServices(toArray(svcRes));
      setIngresses(toArray(ingRes));
    } catch {
      // load failed
    }
  };

  useEffect(() => {
    if (cluster?.code) {
      // eslint-disable-next-line react-hooks/set-state-in-effect
      loadClusterDetail(cluster.code);
    }
  }, [cluster?.code]);

  return (
    <Card className="bg-[var(--dg-bg-secondary)] border-[var(--dg-border)]">
      <CardHeader>
        <div className="flex items-center justify-between">
          <div className="flex items-center gap-3">
            <Cloud className="h-6 w-6 text-[var(--dg-blue)]" />
            <div>
              <CardTitle className="text-[var(--dg-text-primary)]">{cluster.name}</CardTitle>
              <CardDescription className="text-[var(--dg-text-muted)]">
                {cluster.version} · {cluster.node_count || 0} {t('k8s.cluster.nodeCount')} · {t('k8s.cluster.created')}{' '}
                {cluster.created_at ? new Date(cluster.created_at).toLocaleDateString() : '-'}
              </CardDescription>
            </div>
          </div>
          <Button
            variant="ghost"
            size="sm"
            className="text-[var(--dg-text-secondary)] hover:text-[var(--dg-text-primary)]"
            onClick={onClose}
          >
            <XCircle className="h-4 w-4 mr-2" />
            {t('common.close')}
          </Button>
        </div>
      </CardHeader>
      <CardContent>
        <Tabs defaultValue="overview" className="w-full">
          <TabsList className="bg-[var(--dg-bg-tertiary)] border border-[var(--dg-border)] flex-wrap h-auto">
            <TabsTrigger value="overview" className="data-[state=active]:bg-[var(--dg-bg-active)] data-[state=active]:text-[var(--dg-text-primary)]">
              {t('k8s.tab.overview')}
            </TabsTrigger>
            <TabsTrigger value="nodes" className="data-[state=active]:bg-[var(--dg-bg-active)] data-[state=active]:text-[var(--dg-text-primary)]">
              {t('k8s.tab.nodes')} ({nodes.length})
            </TabsTrigger>
            <TabsTrigger value="pods" className="data-[state=active]:bg-[var(--dg-bg-active)] data-[state=active]:text-[var(--dg-text-primary)]">
              {t('k8s.tab.pods')} ({pods.length})
            </TabsTrigger>
            <TabsTrigger value="deployments" className="data-[state=active]:bg-[var(--dg-bg-active)] data-[state=active]:text-[var(--dg-text-primary)]">
              {t('k8s.tab.deployments')} ({deployments.length})
            </TabsTrigger>
            <TabsTrigger value="services" className="data-[state=active]:bg-[var(--dg-bg-active)] data-[state=active]:text-[var(--dg-text-primary)]">
              {t('k8s.tab.services')} ({services.length})
            </TabsTrigger>
            <TabsTrigger value="ingresses" className="data-[state=active]:bg-[var(--dg-bg-active)] data-[state=active]:text-[var(--dg-text-primary)]">
              {t('k8s.tab.ingresses')} ({ingresses.length})
            </TabsTrigger>
            <TabsTrigger value="events" className="data-[state=active]:bg-[var(--dg-bg-active)] data-[state=active]:text-[var(--dg-text-primary)]">
              {t('k8s.tab.events')}
            </TabsTrigger>
          </TabsList>

          <TabsContent value="overview" className="mt-4">
            <OverviewTab
              cluster={cluster}
              trendData={trendData}
              metrics={clusterMetrics}
              onRefresh={() => cluster?.id && loadClusterDetail(cluster.id)}
            />
          </TabsContent>
          <TabsContent value="nodes" className="mt-4"><NodesTab nodes={nodes} /></TabsContent>
          <TabsContent value="pods" className="mt-4"><PodsTab pods={pods} /></TabsContent>
          <TabsContent value="deployments" className="mt-4"><DeploymentsTab deployments={deployments} /></TabsContent>
          <TabsContent value="services" className="mt-4"><ServicesTab services={services} /></TabsContent>
          <TabsContent value="ingresses" className="mt-4"><IngressesTab ingresses={ingresses} /></TabsContent>
          <TabsContent value="events" className="mt-4"><EventsTab /></TabsContent>
        </Tabs>
      </CardContent>
    </Card>
  );
}