import { Card, CardContent, CardHeader } from "@/shared/components/ui/card"
import { Skeleton } from "@/shared/components/ui/skeleton"

/**
 * 仪表盘通用加载骨架屏。
 *
 * 用于各角色 dashboard 路由的 `loading.tsx`，消除重复代码。
 * 布局：页头 + 4 列统计卡片 + 列表骨架。
 */
export function DashboardLoadingSkeleton() {
  return (
    <div className="flex h-full flex-col space-y-8 p-8">
      <div className="space-y-2">
        <Skeleton className="h-8 w-48" />
        <Skeleton className="h-4 w-64" />
      </div>

      <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
        {Array.from({ length: 4 }).map((_, i) => (
          <Card key={i}>
            <CardHeader className="pb-2">
              <Skeleton className="h-4 w-24" />
            </CardHeader>
            <CardContent>
              <Skeleton className="h-8 w-16" />
              <Skeleton className="mt-2 h-3 w-28" />
            </CardContent>
          </Card>
        ))}
      </div>

      <Card>
        <CardHeader>
          <Skeleton className="h-5 w-32" />
        </CardHeader>
        <CardContent className="space-y-3">
          {Array.from({ length: 6 }).map((_, i) => (
            <Skeleton key={i} className="h-12 w-full" />
          ))}
        </CardContent>
      </Card>
    </div>
  )
}