'use client'

import { useMemo } from 'react'
import { BarChart, Bar, XAxis, YAxis, ResponsiveContainer, Tooltip, Cell } from 'recharts'
import { useTheme } from '@/hooks/useTheme'
import { getNodeTypePalette, getChartChrome, getTooltipStyle, getTooltipItemStyle, getTooltipLabelStyle, getCursorStyle } from '../utils/chartTheme'
import { ChartCard } from './ChartCard'

interface ConnectedNodesBarProps {
  data: { label: string; name: string; degree: number }[] | undefined
  isLoading: boolean
}

export function ConnectedNodesBar({ data, isLoading }: ConnectedNodesBarProps) {
  const { theme } = useTheme()
  const palette = useMemo(() => getNodeTypePalette(), [theme])
  const chrome = useMemo(() => getChartChrome(), [theme])
  const tooltipStyle = useMemo(() => getTooltipStyle(), [theme])
  const tooltipItemStyle = useMemo(() => getTooltipItemStyle(), [theme])
  const tooltipLabelStyle = useMemo(() => getTooltipLabelStyle(), [theme])
  const cursorStyle = useMemo(() => getCursorStyle(), [theme])

  const chartData = useMemo(() => {
    if (!data) return []
    return data.slice(0, 10).map(d => ({
      ...d,
      displayName: d.name.length > 20 ? d.name.slice(0, 17) + '...' : d.name,
    }))
  }, [data])

  return (
    <ChartCard title="Most Connected Nodes" subtitle="Degree centrality" isLoading={isLoading} isEmpty={!chartData.length}>
      <ResponsiveContainer width="100%" height={280}>
        <BarChart data={chartData} layout="vertical" margin={{ left: 4, right: 16, top: 8, bottom: 8 }}>
          <XAxis type="number" tick={{ fontSize: 11, fill: chrome.axisColor }} axisLine={false} tickLine={false} />
          <YAxis
            type="category"
            dataKey="displayName"
            tick={{ fontSize: 10, fill: chrome.axisColor }}
            axisLine={false}
            tickLine={false}
            width={85}
            interval={0}
          />
          <Tooltip
            cursor={cursorStyle}
            contentStyle={tooltipStyle}
            itemStyle={tooltipItemStyle}
            labelStyle={tooltipLabelStyle}
            formatter={(value: number) => [value, 'Connections']}
          />
          <Bar dataKey="degree" radius={[0, 4, 4, 0]} maxBarSize={16} name="Connections">
            {chartData.map((entry) => (
              <Cell key={entry.name} fill={palette[entry.label as keyof typeof palette] || chrome.axisColor} />
            ))}
          </Bar>
        </BarChart>
      </ResponsiveContainer>
    </ChartCard>
  )
}