components/RevenueChart.jsx

import React from 'react';
import {
  LineChart,
  Line,
  XAxis,
  YAxis,
  CartesianGrid,
  Tooltip,
  ResponsiveContainer,
  AreaChart,
  Area
} from 'recharts';

const data = [
  { name: 'Jan', value: 4000 },
  { name: 'Feb', value: 3000 },
  { name: 'Mar', value: 5000 },
  { name: 'Apr', value: 4500 },
  { name: 'May', value: 6000 },
  { name: 'Jun', value: 5500 },
  { name: 'Jul', value: 7000 },
  { name: 'Aug', value: 6500 },
  { name: 'Sep', value: 8000 },
  { name: 'Oct', value: 7500 },
  { name: 'Nov', value: 9000 },
  { name: 'Dec', value: 10000 },
];

function CustomTooltip({ active, payload, label }) {
  if (active && payload && payload.length) {
    return (
      <div className="bg-white dark:bg-dark-surface p-3 border border-gray-200 dark:border-gray-600 rounded-lg shadow-xl">
        <p className="text-xs text-gray-500 dark:text-gray-400 font-medium uppercase">{label}</p>
        <p className="text-sm font-bold text-gray-900 dark:text-white text-lg">
          ${payload[0].value.toLocaleString()}
        </p>
      </div>
    );
  }
  return null;
}

export default function RevenueChart() {
  return (
    <div className="w-full h-full">
      <ResponsiveContainer width="100%" height="100%">
        <AreaChart data={data}>
          <defs>
            <linearGradient id="colorValue" x1="0" y1="0" x2="0" y2="1">
              <stop offset="5%" stopColor="#3b82f6" stopOpacity={0.3}/>
              <stop offset="95%" stopColor="#3b82f6" stopOpacity={0}/>
            </linearGradient>
          </defs>
          <CartesianGrid strokeDasharray="3 3" stroke="#e5e7eb" vertical={false} className="dark:stroke-gray-700" />
          <XAxis 
            dataKey="name" 
            axisLine={false}
            tickLine={false}
            tick={{ fill: '#9ca3af', fontSize: 12 }}
          />
          <YAxis 
            axisLine={false}
            tickLine={false}
            tick={{ fill: '#9ca3af', fontSize: 12 }}
            tickFormatter={(value) => `$${value / 1000}k`}
          />
          <Tooltip content={<CustomTooltip />} cursor={{ fill: 'transparent' }} />
          <Area 
            type="monotone" 
            dataKey="value" 
            stroke="#3b82f6" 
            strokeWidth={3}
            fillOpacity={1} 
            fill="url(#colorValue)" 
          />
        </AreaChart>
      </ResponsiveContainer>
    </div>
  );
}