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

/**
 * DashboardSkeleton provides a layout-accurate placeholder for the main dashboard view.
 * It mimics the 4+3 grid layout used for charts and lists.
 */
export function DashboardSkeleton() {
  return (
    <div className="grid gap-6 md:grid-cols-2 lg:grid-cols-7">
      {/* Revenue Trend Skeleton */}
      <Card className="lg:col-span-4 shadow-sm border-border/40">
        <CardHeader className="flex flex-row items-center justify-between">
          <div className="space-y-2">
            <Skeleton className="h-5 w-32" />
            <Skeleton className="h-3 w-48" />
          </div>
          <Skeleton className="h-5 w-12 rounded-full" />
        </CardHeader>
        <CardContent>
          <Skeleton className="h-[300px] w-full mt-2 rounded-lg" />
        </CardContent>
      </Card>

      {/* Top Products Skeleton */}
      <Card className="lg:col-span-3 shadow-sm border-border/40">
        <CardHeader className="space-y-2">
          <Skeleton className="h-5 w-24" />
          <Skeleton className="h-3 w-40" />
        </CardHeader>
        <CardContent>
          <Skeleton className="h-[300px] w-full mt-2 rounded-lg" />
        </CardContent>
      </Card>

      {/* Recent Orders Skeleton */}
      <Card className="lg:col-span-4 shadow-sm border-border/40">
        <CardHeader className="flex flex-row items-center justify-between">
          <div className="space-y-2">
            <Skeleton className="h-5 w-36" />
            <Skeleton className="h-3 w-52" />
          </div>
          <Skeleton className="h-5 w-20 rounded-md" />
        </CardHeader>
        <CardContent className="p-0">
          <div className="divide-y divide-border/40">
            {Array.from({ length: 5 }).map((_, i) => (
              <div key={i} className="flex items-center justify-between px-6 py-3.5">
                <div className="flex items-center gap-3">
                  <Skeleton className="size-8 rounded-full" />
                  <div className="space-y-1.5">
                    <Skeleton className="h-4 w-20" />
                    <Skeleton className="h-3 w-16" />
                  </div>
                </div>
                <div className="text-right space-y-1.5">
                  <Skeleton className="h-4 w-14 ml-auto" />
                  <Skeleton className="h-3 w-12 ml-auto" />
                </div>
              </div>
            ))}
          </div>
        </CardContent>
      </Card>

      {/* Low Stock Alerts Skeleton */}
      <Card className="lg:col-span-3 shadow-sm border-border/40">
        <CardHeader className="space-y-2">
          <Skeleton className="h-5 w-32" />
          <Skeleton className="h-3 w-44" />
        </CardHeader>
        <CardContent className="p-0">
          <div className="divide-y divide-border/40">
            {Array.from({ length: 5 }).map((_, i) => (
              <div key={i} className="flex items-center justify-between px-6 py-3.5">
                <div className="flex items-center gap-3">
                  <Skeleton className="size-8 rounded-lg" />
                  <div className="space-y-1.5">
                    <Skeleton className="h-4 w-28" />
                    <Skeleton className="h-3 w-16" />
                  </div>
                </div>
                <Skeleton className="h-5 w-16 rounded-md" />
              </div>
            ))}
          </div>
        </CardContent>
      </Card>
    </div>
  );
}