import { Cell, Pie, PieChart } from 'recharts'

import { PanelCard } from '@/components/panel-card'
import { Badge } from '@/components/reui/badge'
import {
  ChartContainer,
  type ChartConfig,
} from '@evobgp/ui/components/chart'
import type { BreakdownSlice } from '@/lib/metrics'

/** chart-27 / chart-13 inspired donut in PanelCard (Frame surface). */
export function DonutBreakdownCard({
  title,
  description,
  slices,
  centerLabel,
  badge,
}: {
  title: string
  description?: string
  slices: BreakdownSlice[]
  centerLabel: string
  badge?: string
}) {
  const total = slices.reduce((sum, s) => sum + s.count, 0)
  const chartConfig = slices.reduce<ChartConfig>((acc, slice) => {
    acc[slice.key] = { label: slice.label, color: slice.color }
    return acc
  }, {})
  const data = slices.map((slice) => ({ ...slice, fill: slice.color, share: slice.count }))

  return (
    <PanelCard
      title={title}
      description={description}
      className="h-full"
      actions={
        badge ? (
          <Badge variant="success-light" className="hidden sm:inline-flex">
            {badge}
          </Badge>
        ) : undefined
      }
    >
      <div className="flex flex-col items-center justify-start gap-4 p-4 sm:flex-row sm:items-center sm:justify-start sm:gap-6">
        {total === 0 ? (
          <p className="text-muted-foreground w-full py-8 text-center text-sm">Нет данных</p>
        ) : (
          <>
            <div className="relative mx-auto size-36 shrink-0 sm:mx-0">
              <ChartContainer config={chartConfig} className="aspect-square size-36">
                <PieChart>
                  <Pie
                    data={data}
                    dataKey="share"
                    nameKey="label"
                    innerRadius={48}
                    outerRadius={64}
                    strokeWidth={2}
                    stroke="var(--color-card)"
                  >
                    {data.map((entry) => (
                      <Cell key={entry.key} fill={entry.fill} />
                    ))}
                  </Pie>
                </PieChart>
              </ChartContainer>
              <div className="pointer-events-none absolute inset-0 flex flex-col items-center justify-center">
                <span className="text-muted-foreground text-xs">{centerLabel}</span>
                <span className="text-lg font-semibold tabular-nums">{total}</span>
              </div>
            </div>
            <ul className="flex w-full min-w-0 max-w-xs flex-col gap-2 sm:w-auto sm:min-w-[10rem]">
              {slices.map((slice) => {
                const pct = total > 0 ? ((slice.count / total) * 100).toFixed(1) : '0'
                return (
                  <li key={slice.key} className="flex items-center justify-between gap-3 text-sm">
                    <span className="flex min-w-0 items-center gap-2">
                      <span
                        className="size-2.5 shrink-0 rounded-full"
                        style={{ backgroundColor: slice.color }}
                        aria-hidden
                      />
                      <span className="truncate">{slice.label}</span>
                    </span>
                    <span className="text-muted-foreground shrink-0 tabular-nums">
                      {slice.count} ({pct}%)
                    </span>
                  </li>
                )
              })}
            </ul>
          </>
        )}
      </div>
    </PanelCard>
  )
}