import { PieChart, Pie, Cell, ResponsiveContainer, Tooltip, Legend } from 'recharts';

const COLORS = {
  income: {
    Sales: '#4caf50',
    Services: '#66bb6a',
    Consulting: '#81c784',
    Subscriptions: '#a5d6a7',
    Refunds: '#c8e6c9',
    'Other Income': '#e8f5e9',
  },
  expense: {
    Supplies: '#ef5350',
    Equipment: '#e57373',
    Marketing: '#ef9a9a',
    Utilities: '#ffcdd2',
    Software: '#ffebee',
    Travel: '#ffcdd2',
    'Professional Services': '#ef5350',
    Taxes: '#e57373',
    Other: '#ffebee',
  },
};

export default function CategoryChart({ transactions, type }) {
  const filtered = transactions.filter((t) => t.type === type);

  const data = filtered.reduce((acc, t) => {
    const existing = acc.find((item) => item.name === t.category);
    if (existing) {
      existing.value += t.amount;
    } else {
      acc.push({ name: t.category, value: t.amount });
    }
    return acc;
  }, []);

  const total = data.reduce((sum, item) => sum + item.value, 0);

  if (data.length === 0) {
    return (
      <div className="text-center py-12">
        <p className="text-neutral-400">No {type} data to display</p>
      </div>
    );
  }

  const colors = type === 'income' ? COLORS.income : COLORS.expense;

  return (
    <div className="h-64">
      <ResponsiveContainer width="100%" height="100%">
        <PieChart>
          <Pie
            data={data}
            cx="50%"
            cy="50%"
            innerRadius={60}
            outerRadius={80}
            paddingAngle={2}
            dataKey="value"
          >
            {data.map((entry, index) => (
              <Cell
                key={`cell-${index}`}
                fill={colors[entry.name] || '#9e9e9e'}
              />
            ))}
          </Pie>
          <Tooltip
            formatter={(value) => `$${value.toLocaleString()}`}
            contentStyle={{
              backgroundColor: '#fff',
              border: '1px solid #e0e0e0',
              borderRadius: '8px',
              boxShadow: '0 2px 8px rgba(0,0,0,0.1)',

          />
          <Legend
            formatter={(value) => (
              <span className="text-sm text-neutral-600">{value}</span>
            )}
          />
        </PieChart>
      </ResponsiveContainer>
      <div className="text-center mt-2">
        <span className="text-lg font-semibold text-neutral-800">
          ${total.toLocaleString()}
        </span>
        <span className="text-sm text-neutral-500 ml-2">total</span>
      </div>
    </div>
  );
}