"use client"
import {CartesianGrid,Line,LineChart,XAxis,YAxis} from "recharts"
import {ChartContainer,ChartTooltip,ChartTooltipContent,type ChartConfig} from "@/components/ui/chart"
import {formatRangeAgo} from "@/lib/fmt-rate"
const PALETTE=["var(--chart-line-1)","var(--chart-line-2)","var(--chart-line-3)","var(--chart-line-4)","var(--chart-1)","var(--chart-2)","var(--chart-3)","var(--chart-4)"]
const LEGACY_LABELS:Record<string,string>={msk:"MSK",spb:"SPB",fra:"FRA",ams:"AMS"}
interface LatencyChartProps {series:Record<string,(number|null)[]>;labels?:Record<string,string>}
/** Reuse the installed ChartContainer / multi-line composition of ReUI chart-23. */
export function LatencyChart({series,labels:labelsProp}:LatencyChartProps){
 const entries=Object.entries(series).filter(([,values])=>values.some(v=>typeof v==="number"&&Number.isFinite(v)))
 const count=Math.max(1,...entries.map(([,values])=>values.length))
 const data=Array.from({length:count},(_,i)=>({time:formatRangeAgo(Math.round((1-i/Math.max(count-1,1))*60)),...Object.fromEntries(entries.map(([key,values])=>[key,typeof values[i]==="number"&&Number.isFinite(values[i])?values[i]:null]))}))
 const label=(key:string)=>labelsProp?.[key]??LEGACY_LABELS[key]??key.replace(/^src-/,"")
 const config=Object.fromEntries(entries.map(([key],index)=>[key,{label:label(key),color:PALETTE[index%PALETTE.length]}])) satisfies ChartConfig
 const dot=(key:string)=>function IsolatedDot({cx,cy,index}:{cx?:number;cy?:number;index?:number}){const values=series[key];if(index==null||cx==null||cy==null||values[index]==null||values[index-1]!=null||values[index+1]!=null)return <g/>;return <circle cx={cx} cy={cy} r={3} fill={config[key].color} data-latency-isolated="true"/>}
 if(!entries.length)return <p role="status" className="py-10 text-center text-sm text-muted-foreground">Нет измеренной истории RTT</p>
 return <div role="region" aria-label="История RTT по источникам" className="flex flex-col gap-3">
  <ChartContainer config={config} className="aspect-auto h-[220px] w-full"><LineChart data={data} margin={{top:8,right:8,left:0,bottom:0}}>
   <CartesianGrid vertical={false} strokeDasharray="4 8" stroke="var(--border)"/>
   <XAxis dataKey="time" axisLine={false} tickLine={false} tick={{fontSize:11}} tickMargin={8} minTickGap={16}/>
   <YAxis axisLine={false} tickLine={false} tick={{fontSize:11}} width={52} tickFormatter={(v:number)=>String(v)+" мс"}/>
   <ChartTooltip content={<ChartTooltipContent formatter={(value,name)=><div className="flex min-w-0 items-center gap-2 text-xs"><span>{config[String(name)]?.label??name}</span><span className="font-mono">{typeof value==="number"?String(value)+" мс":"—"}</span></div>}/>}/>
   {entries.map(([key])=><Line key={key} dataKey={key} type="linear" stroke={config[key].color} strokeWidth={1.6} connectNulls={false} dot={dot(key)} isAnimationActive={false}/>)}
  </LineChart></ChartContainer>
  <div className="flex flex-wrap justify-center gap-x-4 gap-y-2">{entries.map(([key])=><span key={key} data-latency-source={key} className="flex items-center gap-1.5 text-xs"><span aria-hidden className="h-0.5 w-3 rounded" style={{background:config[key].color}}/><span className="text-foreground">{label(key)}</span></span>)}</div>
 </div>
}