import type { ReactNode } from 'react'
import type { LucideIcon } from 'lucide-react'
import { EmptyState } from '@/components/empty-state'
import { Badge } from '@/components/reui/badge'
import {
  Frame,
  FrameHeader,
  FramePanel,
  FrameTitle,
} from '@/components/reui/frame'
import { IconTile } from '@/components/reui/icon-tile'
import { cn } from '@cfdm/ui/lib/utils'

/**
 * Sibling Frame columns for dashboard attention queue.
 * Preview: https://reui.io/preview/base/dashboard-1 · https://reui.io/preview/base/stats-12
 * Docs: https://reui.io/docs/components/base/frame · https://reui.io/docs/components/base/icon-tile
 */
export interface AttentionQueueColumn {
  id: string
  title: string
  icon: LucideIcon
  iconClassName?: string
  count: number
  countVariant?: 'destructive' | 'warning' | 'secondary' | 'destructive-light' | 'warning-light'
  emptyTitle: string
  emptyDescription: string
  emptyAction?: ReactNode
  children: ReactNode
}

interface AttentionQueueProps {
  columns: AttentionQueueColumn[]
  className?: string
}

const DEFAULT_ICON_CLASS = 'text-muted-foreground [&_svg]:text-current'

export function AttentionQueue({ columns, className }: AttentionQueueProps) {
  return (
    <div
      className={cn(
        'grid min-w-0 items-start gap-2 @3xl:grid-cols-3',
        className,
      )}
    >
      {columns.map((column) => {
        const Icon = column.icon
        const isEmpty = column.count === 0
        return (
          <Frame key={column.id} dense spacing="sm" className="min-w-0 w-full">
            <FrameHeader>
              <div className="flex min-w-0 items-center gap-2">
                <IconTile
                  variant="elevated"
                  size="sm"
                  className={cn(DEFAULT_ICON_CLASS, column.iconClassName)}
                  aria-hidden="true"
                >
                  <Icon />
                </IconTile>
                <FrameTitle className="min-w-0 truncate">{column.title}</FrameTitle>
                {column.count > 0 ? (
                  <Badge
                    size="sm"
                    variant={column.countVariant ?? 'secondary'}
                    className="tabular-nums"
                  >
                    {column.count}
                  </Badge>
                ) : null}
              </div>
            </FrameHeader>
            <FramePanel className="min-w-0">
              {isEmpty ? (
                <div className="flex min-h-28 items-center justify-center py-4">
                  <EmptyState
                    icon={Icon}
                    title={column.emptyTitle}
                    description={column.emptyDescription}
                    action={column.emptyAction}
                    centered={false}
                    stackedIcon={false}
                  />
                </div>
              ) : (
                column.children
              )}
            </FramePanel>
          </Frame>
        )
      })}
    </div>
  )
}