import { Card, CardContent, CardHeader } from "@/components/ui/card";
import { Skeleton } from "@/components/ui/skeleton";
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
} from "@/components/ui/table";

export function PageHeaderSkeleton({
  withAction = false,
}: {
  withAction?: boolean;
}) {
  return (
    <div className="flex items-end justify-between gap-4">
      <div className="space-y-2">
        <Skeleton className="h-7 w-40" />
        <Skeleton className="h-4 w-56" />
      </div>
      {withAction && <Skeleton className="h-9 w-28" />}
    </div>
  );
}

export function TablePageSkeleton({
  columns = 6,
  rows = 8,
  withFilters = true,
  withAction = false,
}: {
  columns?: number;
  rows?: number;
  withFilters?: boolean;
  withAction?: boolean;
}) {
  return (
    <div className="space-y-6">
      <PageHeaderSkeleton withAction={withAction} />
      {withFilters && (
        <div className="flex flex-wrap gap-2">
          <Skeleton className="h-9 w-40" />
          <Skeleton className="h-9 w-32" />
          <Skeleton className="h-9 w-32" />
          <Skeleton className="h-9 w-24" />
        </div>
      )}
      <Card className="overflow-hidden">
        <CardContent className="p-0">
          <Table>
            <TableHeader>
              <TableRow>
                {Array.from({ length: columns }).map((_, i) => (
                  <TableHead key={i}>
                    <Skeleton className="h-3 w-16" />
                  </TableHead>
                ))}
              </TableRow>
            </TableHeader>
            <TableBody>
              {Array.from({ length: rows }).map((_, r) => (
                <TableRow key={r}>
                  {Array.from({ length: columns }).map((_, c) => (
                    <TableCell key={c}>
                      <Skeleton
                        className={`h-4 ${c === 0 ? "w-28" : "w-20"}`}
                      />
                    </TableCell>
                  ))}
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </CardContent>
      </Card>
    </div>
  );
}

export function DetailPageSkeleton({
  cards = 3,
}: {
  cards?: number;
}) {
  return (
    <div className="space-y-6">
      <div className="flex items-center gap-3">
        <Skeleton className="h-8 w-8 rounded-md" />
        <div className="space-y-2">
          <Skeleton className="h-7 w-48" />
          <Skeleton className="h-4 w-32" />
        </div>
      </div>
      <div className="grid grid-cols-1 lg:grid-cols-3 gap-4">
        {Array.from({ length: cards }).map((_, i) => (
          <Card key={i} className={i === 0 ? "lg:col-span-2" : ""}>
            <CardHeader>
              <Skeleton className="h-5 w-32" />
            </CardHeader>
            <CardContent className="space-y-3">
              <Skeleton className="h-4 w-full" />
              <Skeleton className="h-4 w-48" />
              <Skeleton className="h-4 w-36" />
              <Skeleton className="h-24 w-full" />
            </CardContent>
          </Card>
        ))}
      </div>
    </div>
  );
}

export function DashboardSkeleton() {
  return (
    <div className="space-y-6">
      <div className="space-y-2">
        <Skeleton className="h-7 w-40" />
        <Skeleton className="h-4 w-64" />
      </div>
      <div className="grid grid-cols-1 sm:grid-cols-2 xl:grid-cols-4 gap-4">
        {Array.from({ length: 4 }).map((_, i) => (
          <Card key={i}>
            <CardContent className="p-5 space-y-3">
              <Skeleton className="h-3 w-24" />
              <Skeleton className="h-8 w-28" />
              <Skeleton className="h-3 w-16" />
            </CardContent>
          </Card>
        ))}
      </div>
      <div className="grid grid-cols-1 lg:grid-cols-3 gap-4">
        <Card className="lg:col-span-2">
          <CardHeader>
            <Skeleton className="h-5 w-40" />
          </CardHeader>
          <CardContent>
            <Skeleton className="h-72 w-full" />
          </CardContent>
        </Card>
        <Card>
          <CardHeader>
            <Skeleton className="h-5 w-32" />
          </CardHeader>
          <CardContent className="space-y-3">
            {Array.from({ length: 5 }).map((_, i) => (
              <Skeleton key={i} className="h-10 w-full" />
            ))}
          </CardContent>
        </Card>
      </div>
    </div>
  );
}

export function SettingsSkeleton() {
  return (
    <div className="space-y-6">
      <PageHeaderSkeleton withAction />
      <Card>
        <CardHeader>
          <Skeleton className="h-5 w-36" />
        </CardHeader>
        <CardContent className="space-y-4">
          <div className="space-y-2">
            <Skeleton className="h-3 w-40" />
            <Skeleton className="h-9 w-full" />
          </div>
          <div className="space-y-2">
            <Skeleton className="h-3 w-40" />
            <Skeleton className="h-9 w-full" />
          </div>
          <div className="space-y-2">
            <Skeleton className="h-3 w-36" />
            <Skeleton className="h-9 w-40" />
          </div>
        </CardContent>
      </Card>
      <Card>
        <CardHeader className="flex flex-row items-center justify-between">
          <Skeleton className="h-5 w-32" />
          <Skeleton className="h-8 w-28" />
        </CardHeader>
        <CardContent className="p-0">
          <Table>
            <TableHeader>
              <TableRow>
                {Array.from({ length: 5 }).map((_, i) => (
                  <TableHead key={i}>
                    <Skeleton className="h-3 w-16" />
                  </TableHead>
                ))}
              </TableRow>
            </TableHeader>
            <TableBody>
              {Array.from({ length: 4 }).map((_, r) => (
                <TableRow key={r}>
                  {Array.from({ length: 5 }).map((_, c) => (
                    <TableCell key={c}>
                      <Skeleton className="h-4 w-24" />
                    </TableCell>
                  ))}
                </TableRow>
              ))}
            </TableBody>
          </Table>
        </CardContent>
      </Card>
    </div>
  );
}

export function FormPageSkeleton() {
  return (
    <div className="space-y-6 max-w-3xl">
      <div className="space-y-2">
        <Skeleton className="h-7 w-48" />
        <Skeleton className="h-4 w-72" />
      </div>
      <Card>
        <CardHeader>
          <Skeleton className="h-5 w-28" />
        </CardHeader>
        <CardContent className="space-y-4">
          {Array.from({ length: 5 }).map((_, i) => (
            <div key={i} className="space-y-2">
              <Skeleton className="h-3 w-24" />
              <Skeleton className="h-9 w-full" />
            </div>
          ))}
        </CardContent>
      </Card>
    </div>
  );
}

export function AnalyticsSkeleton() {
  return (
    <div className="space-y-6">
      <div className="flex items-end justify-between gap-4">
        <div className="space-y-2">
          <Skeleton className="h-7 w-36" />
          <Skeleton className="h-4 w-52" />
        </div>
        <div className="flex gap-2">
          <Skeleton className="h-9 w-32" />
          <Skeleton className="h-9 w-32" />
          <Skeleton className="h-9 w-24" />
        </div>
      </div>
      <div className="grid grid-cols-1 lg:grid-cols-3 gap-4">
        <Card className="lg:col-span-2">
          <CardHeader>
            <Skeleton className="h-5 w-40" />
          </CardHeader>
          <CardContent>
            <Skeleton className="h-72 w-full" />
          </CardContent>
        </Card>
        <Card>
          <CardHeader>
            <Skeleton className="h-5 w-28" />
          </CardHeader>
          <CardContent>
            <Skeleton className="h-72 w-full rounded-full max-w-[220px] mx-auto aspect-square" />
          </CardContent>
        </Card>
      </div>
    </div>
  );
}

export function AnnouncementsSkeleton() {
  return (
    <div className="space-y-6">
      <PageHeaderSkeleton withAction />
      <Card>
        <CardHeader>
          <Skeleton className="h-5 w-40" />
        </CardHeader>
        <CardContent className="space-y-3">
          <Skeleton className="h-9 w-full" />
          <Skeleton className="h-9 w-48" />
        </CardContent>
      </Card>
      <Card>
        <CardHeader>
          <Skeleton className="h-5 w-36" />
        </CardHeader>
        <CardContent className="space-y-3">
          {Array.from({ length: 4 }).map((_, i) => (
            <Skeleton key={i} className="h-14 w-full" />
          ))}
        </CardContent>
      </Card>
    </div>
  );
}

export function CollectionsSkeleton() {
  return (
    <div className="space-y-6">
      <PageHeaderSkeleton withAction />
      <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-3 gap-4">
        {Array.from({ length: 6 }).map((_, i) => (
          <Card key={i}>
            <CardContent className="p-5 space-y-3">
              <Skeleton className="h-5 w-32" />
              <Skeleton className="h-4 w-48" />
              <Skeleton className="h-4 w-20" />
            </CardContent>
          </Card>
        ))}
      </div>
    </div>
  );
}

/** Compact row skeletons for tables that keep their own header visible. */
export function TableBodySkeleton({
  columns,
  rows = 6,
}: {
  columns: number;
  rows?: number;
}) {
  return (
    <>
      {Array.from({ length: rows }).map((_, r) => (
        <TableRow key={r}>
          {Array.from({ length: columns }).map((_, c) => (
            <TableCell key={c}>
              <Skeleton className={`h-4 ${c === 0 ? "w-28" : "w-20"}`} />
            </TableCell>
          ))}
        </TableRow>
      ))}
    </>
  );
}