todos2/frontend/src/components/dashboard/CategoryChart.tsx

"use client";

import {
  PieChart,
  Pie,
  Cell,
  ResponsiveContainer,
  Tooltip,
  Legend,
} from "recharts";
import { CategoryStat } from "@/types";

interface CategoryChartProps {
  data: CategoryStat[] | undefined;
  isLoading: boolean;
}

export default function CategoryChart({ data, isLoading }: CategoryChartProps) {
  if (isLoading) {
    return (
      <div className="bg-white rounded-xl border border-gray-200 p-5">
        <h3 className="text-sm font-semibold text-gray-900 mb-4">
          카테고리별 분포
        </h3>
        <div className="h-[250px] flex items-center justify-center">
          <div className="w-40 h-40 rounded-full border-8 border-gray-200 animate-pulse" />
        </div>
      </div>
    );
  }

  if (!data || data.length === 0) {
    return (
      <div className="bg-white rounded-xl border border-gray-200 p-5">
        <h3 className="text-sm font-semibold text-gray-900 mb-4">
          카테고리별 분포
        </h3>
        <div className="h-[250px] flex items-center justify-center text-gray-400 text-sm">
          데이터가 없습니다
        </div>
      </div>
    );
  }

  const chartData = data.map((item) => ({
    name: item.name,
    value: item.count,
    color: item.color,
  }));

  return (
    <div className="bg-white rounded-xl border border-gray-200 p-5">
      <h3 className="text-sm font-semibold text-gray-900 mb-4">
        카테고리별 분포
      </h3>
      <div className="h-[250px]">
        <ResponsiveContainer width="100%" height="100%">
          <PieChart>
            <Pie
              data={chartData}
              cx="50%"
              cy="50%"
              innerRadius={60}
              outerRadius={90}
              paddingAngle={2}
              dataKey="value"
            >
              {chartData.map((entry, index) => (
                <Cell key={`cell-${index}`} fill={entry.color} />
              ))}
            </Pie>
            <Tooltip
              formatter={(value: number, name: string) => [
                `${value}개`,
                name,
              ]}
              contentStyle={{
                borderRadius: "8px",
                border: "1px solid #e5e7eb",
                fontSize: "12px",
              }}
            />
            <Legend
              verticalAlign="bottom"
              height={36}
              formatter={(value) => (
                <span className="text-xs text-gray-600">{value}</span>
              )}
            />
          </PieChart>
        </ResponsiveContainer>
      </div>
    </div>
  );
}