"use client";

import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Database, TrendingUp, Users, Activity } from 'lucide-react';
import { StatsOverview } from '@/lib/types';

interface StatsCardsProps {
  stats: StatsOverview | null;
  loading?: boolean;
}

export function StatsCards({ stats, loading }: StatsCardsProps) {
  if (loading) {
    return (
      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
        {Array.from({ length: 4 }).map((_, i) => (
          <Card key={i}>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">加载中...</CardTitle>
            </CardHeader>
            <CardContent>
              <div className="text-2xl font-bold">--</div>
            </CardContent>
          </Card>
        ))}
      </div>
    );
  }

  if (!stats) {
    return null;
  }

  return (
    <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-sm font-medium">总账户数</CardTitle>
          <Database className="h-4 w-4 text-muted-foreground" />
        </CardHeader>
        <CardContent>
          <div className="text-2xl font-bold">{stats.totalAccounts}</div>
        </CardContent>
      </Card>
      
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-sm font-medium">平台数量</CardTitle>
          <TrendingUp className="h-4 w-4 text-muted-foreground" />
        </CardHeader>
        <CardContent>
          <div className="text-2xl font-bold">{Object.keys(stats.platformSummary).length}</div>
          <p className="text-xs text-muted-foreground">
            {Object.entries(stats.platformSummary).slice(0, 3).map(([platform, count]) => (
              `${platform}: ${count}`
            )).join(', ')}
          </p>
        </CardContent>
      </Card>
      
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-sm font-medium">所有者数量</CardTitle>
          <Users className="h-4 w-4 text-muted-foreground" />
        </CardHeader>
        <CardContent>
          <div className="text-2xl font-bold">{Object.keys(stats.ownerSummary).length}</div>
          <p className="text-xs text-muted-foreground">
            {Object.entries(stats.ownerSummary).slice(0, 3).map(([owner, count]) => (
              `${owner}: ${count}`
            )).join(', ')}
          </p>
        </CardContent>
      </Card>
      
      <Card>
        <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
          <CardTitle className="text-sm font-medium">可用账户</CardTitle>
          <Activity className="h-4 w-4 text-muted-foreground" />
        </CardHeader>
        <CardContent>
          <div className="text-2xl font-bold text-green-600">
            {(stats.statusSummary.available || 0) + (stats.statusSummary.exported || 0)}
          </div>
          <p className="text-xs text-muted-foreground">
            可用: {stats.statusSummary.available || 0} | 
            已导出: {stats.statusSummary.exported || 0}
          </p>
          <p className="text-xs text-muted-foreground">
            已锁定: {stats.statusSummary.locked || 0} | 
            已封禁: {stats.statusSummary.banned || 0}
          </p>
        </CardContent>
      </Card>
    </div>
  );
}