"use client"

import { Area, AreaChart, CartesianGrid, XAxis, YAxis } from "recharts"
import { Frame, FramePanel } from "@/components/reui/frame"
import { ChartContainer, ChartTooltip, type ChartConfig } from "@/components/ui/chart"
import { formatBytes } from "@/lib/fmt-rate"
import type { StatisticsSeriesPoint } from "@mmapp/contracts/statistics"

/**
 * Объём трафика за период — adapt ReUI chart-23 (байты, не live bps).
 * @see https://reui.io/preview/base/chart-23
 */

const chartConfig = {
  bytes: { label: "Объём", color: "var(--chart-1)" },
} satisfies ChartConfig

function formatTick(iso: string, grain: "hour" | "day"): string {
  const d = new Date(iso)
  if (Number.isNaN(d.getTime())) return iso.slice(0, 10)
  if (grain === "hour") {
    return `${String(d.getHours()).padStart(2, "0")}:00`
  }
  return d.toLocaleDateString("ru-RU", { day: "2-digit", month: "short" })
}

function CustomTooltip({
  active,
  payload,
}: {
  active?: boolean
  payload?: { payload: { label: string; bytes: number } }[]
}) {
  if (!active || !payload?.length) return null
  const row = payload[0]?.payload
  if (!row) return null
  return (
    <div className="flex min-w-[120px] flex-col gap-1.5 rounded-lg bg-popover p-3 text-popover-foreground shadow-lg ring-1 ring-foreground/10">
      <div className="text-[10px] font-medium tracking-wider uppercase opacity-70">{row.label}</div>
      <div className="text-sm font-semibold tabular-nums">{formatBytes(row.bytes)}</div>
    </div>
  )
}

export function StatisticsVolumeChart({
  series,
  grain,
}: {
  series: StatisticsSeriesPoint[]
  grain: "hour" | "day"
}) {
  const data = series.map((p) => ({
    t: p.t,
    bytes: p.bytes,
    label: formatTick(p.t, grain),
  }))
  const tickEvery = Math.max(1, Math.ceil(data.length / 8))

  return (
    <Frame className="w-full">
      <FramePanel className="flex flex-col gap-4">
        <div className="flex items-baseline justify-between gap-2">
          <h2 className="text-sm font-medium">Объём по времени</h2>
          <span className="text-muted-foreground text-xs">
            {grain === "hour" ? "по часам" : "по суткам"}
          </span>
        </div>
        {data.length === 0 ? (
          <p className="text-muted-foreground py-10 text-center text-sm">Нет данных за выбранный период</p>
        ) : (
          <ChartContainer config={chartConfig} className="-ms-4 aspect-auto h-[220px] w-full">
            <AreaChart data={data} margin={{ top: 5, right: 5, left: 5, bottom: 5 }}>
              <CartesianGrid strokeDasharray="4 8" vertical={false} stroke="var(--border)" />
              <XAxis
                dataKey="label"
                axisLine={false}
                tickLine={false}
                tick={{ fontSize: 11 }}
                tickMargin={10}
                interval={tickEvery - 1}
              />
              <YAxis
                axisLine={false}
                tickLine={false}
                tick={{ fontSize: 11 }}
                tickFormatter={(v: number) => formatBytes(Number(v))}
                tickMargin={8}
                width={72}
              />
              <ChartTooltip content={<CustomTooltip />} />
              <Area
                dataKey="bytes"
                type="monotone"
                stroke="var(--chart-1)"
                fill="var(--chart-1)"
                fillOpacity={0.15}
                strokeWidth={2}
              />
            </AreaChart>
          </ChartContainer>
        )}
      </FramePanel>
    </Frame>
  )
}