import React, { useMemo } from 'react';
import { OcrDocument } from '../../types';

interface OcrStatsProps {
  documents: OcrDocument[];
}

const StatCard: React.FC<{ label: string; value: string; icon: string; color: string }> = ({
  label,
  value,
  icon,
  color,
}) => (
  <div className="bg-white p-6 rounded-lg shadow-sm flex items-center space-x-4">
    <div className={`text-3xl p-4 rounded-full bg-opacity-10 ${color}`}>
      <i className={`fa-solid ${icon}`}></i>
    </div>
    <div>
      <p className="text-gray-600 font-medium">{label}</p>
      <p className="text-3xl font-bold text-gray-800">{value}</p>
    </div>
  </div>
);

const OcrStats: React.FC<OcrStatsProps> = ({ documents }) => {
  const stats = useMemo(() => {
    const today = new Date();
    const startOfToday = new Date(today.getFullYear(), today.getMonth(), today.getDate());

    const processedToday = documents.filter((d) => d.uploadedAt >= startOfToday).length;
    const needsReview = documents.filter((d) => d.status === 'Needs Review').length;

    const completedDocs = documents.filter(
      (d) => d.status === 'Completed' || d.status === 'Needs Review'
    );
    const totalAccuracy = completedDocs.reduce((sum, doc) => sum + doc.accuracy, 0);
    const avgAccuracy = completedDocs.length > 0 ? totalAccuracy / completedDocs.length : 0;

    return { processedToday, needsReview, avgAccuracy };
  }, [documents]);

  return (
    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
      <StatCard
        label="Diproses Hari Ini"
        value={stats.processedToday.toString()}
        icon="fa-calendar-day"
        color="text-blue-500 bg-blue-500"
      />
      <StatCard
        label="Akurasi Rata-rata"
        value={`${stats.avgAccuracy.toFixed(1)}%`}
        icon="fa-crosshairs"
        color="text-green-500 bg-green-500"
      />
      <StatCard
        label="Perlu Tinjauan"
        value={stats.needsReview.toString()}
        icon="fa-user-check"
        color="text-yellow-500 bg-yellow-500"
      />
    </div>
  );
};

export default OcrStats;