"use client"

import type { KeyboardEvent, ReactNode } from "react"
import Link from "next/link"
import {
  Frame,
  FrameDescription,
  FrameHeader,
  FramePanel,
  FrameTitle,
} from "@/components/reui/frame"
import { Badge } from "@/components/reui/badge"
import { IconTile } from "@/components/reui/icon-tile"
import { cn } from "@/lib/utils"
import { kpiCols } from "./kpi-cols"

type QuickActionBase = {
  id: string
  title: string
  description: string
  icon?: ReactNode
  iconClassName?: string
  badge?: string
  disabled?: boolean
}

export type QuickActionItem = QuickActionBase &
  (
    | { href: string; onClick?: never }
    | { onClick: () => void; href?: never }
  )

interface QuickActionGridProps {
  actions: QuickActionItem[]
  title?: string
  description?: string
  className?: string
}

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

function resolveBadge(action: QuickActionItem): string {
  if (action.badge) return action.badge
  return action.onClick ? "Выполнить" : "Перейти"
}

function handleActionKeyDown(onActivate: () => void, event: KeyboardEvent<HTMLDivElement>) {
  if (event.key === "Enter" || event.key === " ") {
    event.preventDefault()
    onActivate()
  }
}

function QuickActionBody({ action }: { action: QuickActionItem }) {
  return (
    <div className="relative z-10 flex h-full items-start gap-3">
      {action.icon ? (
        <IconTile
          variant="elevated"
          aria-hidden="true"
          className={cn("size-10.5", action.iconClassName ?? DEFAULT_ICON_CLASS)}
        >
          {action.icon}
        </IconTile>
      ) : null}

      <div className="flex min-w-0 flex-1 flex-col gap-0.5">
        <div className="flex items-start justify-between gap-2">
          <span className="text-foreground text-sm font-medium">{action.title}</span>
          <Badge variant="outline" size="sm" className="shrink-0">
            {resolveBadge(action)}
          </Badge>
        </div>
        <p className="text-muted-foreground line-clamp-2 text-xs leading-relaxed">
          {action.description}
        </p>
      </div>
    </div>
  )
}

function panelClassName(disabled?: boolean) {
  return cn(
    "relative isolate flex h-full flex-col transition-colors",
    disabled
      ? "cursor-not-allowed opacity-60"
      : "hover:bg-muted/40 focus-within:ring-ring cursor-pointer focus-within:ring-2",
  )
}

/**
 * KPI-like quick actions strip (horizontal Frame tiles).
 * Preview: https://reui.io/preview/base/stats-12 · https://reui.io/preview/base/card-12
 * Docs: https://reui.io/docs/components/base/frame · https://reui.io/docs/components/base/icon-tile
 */
export function QuickActionGrid({
  actions,
  title = "Быстрые действия",
  description,
  className,
}: QuickActionGridProps) {
  if (actions.length === 0) return null

  return (
    <Frame dense spacing="sm" className={cn("@container w-full", className)}>
      {(title || description) && (
        <FrameHeader>
          {title ? <FrameTitle>{title}</FrameTitle> : null}
          {description ? <FrameDescription>{description}</FrameDescription> : null}
        </FrameHeader>
      )}
      <div className={cn("grid gap-2", kpiCols(actions.length))}>
        {actions.map((action) => {
          const label = `${action.title}: ${action.description}`

          if ("href" in action && action.href) {
            return (
              <FramePanel key={action.id} className={panelClassName(action.disabled)}>
                {action.disabled ? (
                  <div aria-disabled aria-label={label}>
                    <QuickActionBody action={action} />
                  </div>
                ) : (
                  <>
                    <QuickActionBody action={action} />
                    <Link
                      href={action.href}
                      className="absolute inset-0 z-20 focus-visible:outline-none"
                      aria-label={label}
                    />
                  </>
                )}
              </FramePanel>
            )
          }

          const onClick = action.onClick
          const onActivate = () => {
            if (action.disabled || !onClick) return
            onClick()
          }

          return (
            <FramePanel
              key={action.id}
              className={panelClassName(action.disabled)}
              role="button"
              tabIndex={action.disabled ? -1 : 0}
              aria-disabled={action.disabled || undefined}
              aria-label={label}
              onClick={onActivate}
              onKeyDown={(e) => handleActionKeyDown(onActivate, e)}
            >
              <QuickActionBody action={action} />
            </FramePanel>
          )
        })}
      </div>
    </Frame>
  )
}