client/src/components/IterationChart.tsx

import React from "react";
import {
  Chart as ChartJS,
  CategoryScale,
  LinearScale,
  PointElement,
  LineElement,
  Title,
  Tooltip,
  Legend,
  Filler
} from 'chart.js';
import { Line } from 'react-chartjs-2';

ChartJS.register(
  CategoryScale,
  LinearScale,
  PointElement,
  LineElement,
  Title,
  Tooltip,
  Legend,
  Filler
);

interface IterationChartProps {
  data: { version: number; score: number }[];
}

export function IterationChart({ data }: IterationChartProps) {
  const chartData = {
    labels: data.map(d => `v${d.version}`),
    datasets: [
      {
        label: 'Score Progress',
        data: data.map(d => d.score),
        borderColor: '#00d9ff',
        backgroundColor: 'rgba(0, 217, 255, 0.1)',
        fill: true,
        tension: 0.4,
        pointBackgroundColor: '#00ff41',
        pointBorderColor: '#fff',
        pointHoverRadius: 6,
      },
    ],
  };

  const options = {
    responsive: true,
    maintainAspectRatio: false,
    plugins: {
      legend: {
        display: false,
      },
      tooltip: {
        backgroundColor: '#1a1a1a',
        titleColor: '#00d9ff',
        bodyColor: '#fff',
        borderColor: '#00d9ff',
        borderWidth: 1,
      },
    },
    scales: {
      y: {
        min: 0,
        max: 100,
        grid: {
          color: 'rgba(255, 255, 255, 0.1)',
        },
        ticks: {
          color: '#888',
        },
      },
      x: {
        grid: {
          display: false,
        },
        ticks: {
          color: '#888',
        },
      },
    },
  };

  return (
    <div className="h-64 w-full">
      <Line data={chartData} options={options} />
    </div>
  );
}