import { useEffect, useState } from 'react';
import { PieChart, Pie, Cell, Legend, Tooltip, ResponsiveContainer } from 'recharts';
import type { BucketUsage } from '@/types';
import { formatBytes } from '@/lib/utils';
import { chartColorPalette, getTextColor, getTooltipStyle } from '@/lib/chart-colors';

interface BucketUsageChartProps {
  data: BucketUsage[];
}

export function BucketUsageChart({ data }: BucketUsageChartProps) {
  const [isDark, setIsDark] = useState(false);

  useEffect(() => {
    // Check if dark mode is enabled
    const checkDarkMode = () => {
      setIsDark(document.documentElement.classList.contains('dark'));
    };

    checkDarkMode();

    // Listen for theme changes
    const observer = new MutationObserver(checkDarkMode);
    observer.observe(document.documentElement, { attributes: true, attributeFilter: ['class'] });

    return () => observer.disconnect();
  }, []);

  const colors = isDark ? chartColorPalette.dark : chartColorPalette.light;
  const textColor = getTextColor(isDark);
  const tooltipStyle = getTooltipStyle(isDark);

  const chartData = data.map(item => ({
    name: item.bucketName,
    value: item.size,
    displaySize: formatBytes(item.size),
  }));

  return (
    <ResponsiveContainer width="100%" height={300}>
      <PieChart>
        <Pie
          data={chartData}
          cx="50%"
          cy="50%"
          labelLine={false}
          label={({ name, displaySize }) => `${name}: ${displaySize}`}
          outerRadius={80}
          fill="#8884d8"
          dataKey="value"
        >
          {chartData.map((_, index) => (
            <Cell key={`cell-${index}`} fill={colors[index % colors.length]} />
          ))}
        </Pie>
        <Tooltip
          formatter={(value) => formatBytes(value as number)}
          contentStyle={tooltipStyle as React.CSSProperties}
          labelStyle={{ color: textColor }}
        />
        <Legend wrapperStyle={{ color: textColor }} />
      </PieChart>
    </ResponsiveContainer>
  );
}