// 中间件概览图表 — 状态 + 命中率 + QPS/连接（支持放大）// Logan.Li
import { useMemo, type ReactNode } from 'react';
import {
  BarChart, Bar, XAxis, YAxis, Tooltip,
  ResponsiveContainer, Cell, PieChart, Pie,
} from 'recharts';
import { Card, CardContent } from '@/components/ui/card';
import { BarChart3, PieChart as PieChartIcon, Percent } from 'lucide-react';
import type { MwTarget } from './helpers';
import { fmtHitRate, fmtVal } from './helpers';
import { ChartExpandShell } from '../shared/ChartExpandShell';
import { MonitorChartTooltip, MONITOR_PIE_STROKE, MonitorPieTooltip } from '../shared/monitorChartTheme';
import { useTranslation } from 'react-i18next';

interface Props {
  targets: MwTarget[];
}

function shortName(name: string) {
  return name.length > 10 ? `${name.slice(0, 10)}…` : name;
}

export function MwOverviewCharts({ targets }: Props) {
  const { t } = useTranslation();
  const statusData = useMemo(() => {
    const online = targets.filter((tg) => tg.status === 'online').length;
    const offline = targets.length - online;
    return [
      { name: t('agent.agentOnline'), value: online, fill: 'var(--dg-green)' },
      { name: t('agent.agentOffline'), value: offline, fill: 'var(--dg-red)' },
    ].filter((d) => d.value > 0);
  }, [targets, t]);

  const redisHitData = useMemo(() => targets
    .filter((tg) => tg.description === 'redis' && tg.latest_metrics?.redis_hit_rate > 0)
    .map((tg) => ({
      name: shortName(tg.name), fullName: tg.name,
      value: (tg.latest_metrics.redis_hit_rate || 0) * 100,
      fill: (tg.latest_metrics.redis_hit_rate || 0) >= 0.9 ? 'var(--dg-green)' : 'var(--dg-yellow)',
    }))
    .sort((a, b) => a.value - b.value), [targets]);

  const redisQpsData = useMemo(() => targets
    .filter((tg) => tg.description === 'redis' && tg.latest_metrics?.redis_qps > 0)
    .map((tg) => ({ name: shortName(tg.name), fullName: tg.name, value: tg.latest_metrics.redis_qps, fill: 'var(--dg-blue)' }))
    .sort((a, b) => b.value - a.value), [targets]);

  const mysqlConnData = useMemo(() => targets
    .filter((tg) => tg.description === 'mysql' && tg.latest_metrics?.mysql_connections > 0)
    .map((tg) => ({ name: shortName(tg.name), fullName: tg.name, value: tg.latest_metrics.mysql_connections, fill: 'var(--dg-blue)' }))
    .sort((a, b) => b.value - a.value), [targets]);

  if (targets.length === 0) return null;

  return (
    <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-3">
      <OverviewChartCard title={t('monitor.lbl.instanceStatus')} icon={<PieChartIcon className="h-3.5 w-3.5 text-[var(--dg-text-muted)]" />} empty={statusData.length === 0}>
        {(h) => (
          <ResponsiveContainer width="100%" height={h}>
            <PieChart>
              <Pie data={statusData} dataKey="value" nameKey="name" cx="50%" cy="50%"
                innerRadius={h * 0.22} outerRadius={h * 0.34} paddingAngle={2} isAnimationActive={false}>
                {statusData.map((e) => <Cell key={e.name} fill={e.fill} stroke={MONITOR_PIE_STROKE} strokeWidth={2} />)}
              </Pie>
              <Tooltip content={<MonitorPieTooltip />} />
            </PieChart>
          </ResponsiveContainer>
        )}
      </OverviewChartCard>

      <OverviewChartCard title={t('common.online')} icon={<Percent className="h-3.5 w-3.5 text-[var(--dg-text-muted)]" />} empty={redisHitData.length === 0}>
        {(h) => (
          <ResponsiveContainer width="100%" height={h}>
            <BarChart data={redisHitData} layout="vertical" margin={{ left: 0, right: 8 }}>
              <XAxis type="number" domain={[0, 100]} tick={{ fontSize: 9, fill: 'var(--dg-text-muted)' }} tickFormatter={(v) => `${v}%`} />
              <YAxis type="category" dataKey="name" width={64} tick={{ fontSize: 9, fill: 'var(--dg-text-muted)' }} tickLine={false} axisLine={false} />
              <Tooltip content={<MonitorChartTooltip valueFormatter={(v) => fmtHitRate(v / 100)} nameFormatter={() => t('monitor.lbl.hitRate')} />} />
              <Bar dataKey="value" radius={[0, 3, 3, 0]} maxBarSize={14} isAnimationActive={false}>
                {redisHitData.map((e) => <Cell key={e.fullName} fill={e.fill} />)}
              </Bar>
            </BarChart>
          </ResponsiveContainer>
        )}
      </OverviewChartCard>

      <OverviewChartCard title="Redis QPS" icon={<BarChart3 className="h-3.5 w-3.5 text-[var(--dg-text-muted)]" />} empty={redisQpsData.length === 0}>
        {(h) => (
          <ResponsiveContainer width="100%" height={h}>
            <BarChart data={redisQpsData} layout="vertical" margin={{ left: 0, right: 8 }}>
              <XAxis type="number" tick={{ fontSize: 9, fill: 'var(--dg-text-muted)' }} />
              <YAxis type="category" dataKey="name" width={64} tick={{ fontSize: 9, fill: 'var(--dg-text-muted)' }} tickLine={false} axisLine={false} />
              <Tooltip content={<MonitorChartTooltip valueFormatter={(v) => fmtVal(v, 1)} nameFormatter={() => 'QPS'} />} />
              <Bar dataKey="value" radius={[0, 3, 3, 0]} maxBarSize={14} isAnimationActive={false}>
                {redisQpsData.map((e) => <Cell key={e.fullName} fill={e.fill} />)}
              </Bar>
            </BarChart>
          </ResponsiveContainer>
        )}
      </OverviewChartCard>

      <OverviewChartCard title={t('monitor.lbl.mysqlConnections')} icon={<BarChart3 className="h-3.5 w-3.5 text-[var(--dg-text-muted)]" />} empty={mysqlConnData.length === 0}>
        {(h) => (
          <ResponsiveContainer width="100%" height={h}>
            <BarChart data={mysqlConnData} layout="vertical" margin={{ left: 0, right: 8 }}>
              <XAxis type="number" tick={{ fontSize: 9, fill: 'var(--dg-text-muted)' }} />
              <YAxis type="category" dataKey="name" width={64} tick={{ fontSize: 9, fill: 'var(--dg-text-muted)' }} tickLine={false} axisLine={false} />
              <Tooltip content={<MonitorChartTooltip valueFormatter={(v) => fmtVal(v)} nameFormatter={() => t('monitor.lbl.connections')} />} />
              <Bar dataKey="value" radius={[0, 3, 3, 0]} maxBarSize={14} isAnimationActive={false}>
                {mysqlConnData.map((e) => <Cell key={e.fullName} fill={e.fill} />)}
              </Bar>
            </BarChart>
          </ResponsiveContainer>
        )}
      </OverviewChartCard>
    </div>
  );
}

function OverviewChartCard({
  title, icon, empty, children,
}: {
  title: string;
  icon: ReactNode;
  empty?: boolean;
  children: (height: number) => ReactNode;
}) {
  return (
    <Card className="bg-[var(--dg-bg-secondary)] border-[var(--dg-border)]">
      <CardContent className="p-3">
        <ChartExpandShell
          title={title}
          icon={icon}
          className="bg-transparent p-0"
          compactHeight={140}
          expandedHeight={360}
          empty={empty}
        >
          {children}
        </ChartExpandShell>
      </CardContent>
    </Card>
  );
}