// src/components/StatsGrid.tsx
import React, { useContext } from 'react';
import { TrendingUp, FileText, Zap, Target } from 'lucide-react';
import { ThemeContext } from '../contexts/ThemeContext';
import { useUserStats } from '../hooks/useUserStats';

const StatsGrid: React.FC = () => {
  const { theme } = useContext(ThemeContext);
  const { stats } = useUserStats(); // Live stats from Firestore
  const isDark = theme === 'dark';

  // --- Safely parse all stats ---
  const textsHumanized = Number(stats?.textsHumanized ?? 0);
  const wordsProcessed = Number(stats?.wordsProcessed ?? 0);
  const totalSessions = Number(stats?.totalSessions ?? 0);
  const gptAverage = Number(stats?.gptAverage ?? 0);

  // --- Format derived stats ---
  const gptAverageDisplay = `${gptAverage.toFixed(1)}%`;

  const statItems = [
    {
      label: 'Texts Humanized',
      value: textsHumanized.toLocaleString(),
      icon: FileText,
      color: 'blue',
      change: '+12%',
    },
    {
      label: 'Words Processed',
      value: wordsProcessed.toLocaleString(),
      icon: Zap,
      color: 'green',
      change: '+8%',
    },
    {
      label: 'GPT Average',
      value: gptAverageDisplay,
      icon: Target,
      color: 'purple',
      change: '+3%',
    },
    {
      label: 'Total Sessions',
      value: totalSessions.toLocaleString(),
      icon: TrendingUp,
      color: 'orange',
      change: '+15%',
    },
  ];

  const getColorClasses = (color: string) => {
    const colors = {
      blue: `bg-${isDark ? 'blue-800' : 'blue-50'} text-${
        isDark ? 'blue-300' : 'blue-600'
      } border-${isDark ? 'blue-700' : 'blue-200'}`,
      green: `bg-${isDark ? 'green-800' : 'green-50'} text-${
        isDark ? 'green-300' : 'green-600'
      } border-${isDark ? 'green-700' : 'green-200'}`,
      purple: `bg-${isDark ? 'purple-800' : 'purple-50'} text-${
        isDark ? 'purple-300' : 'purple-600'
      } border-${isDark ? 'purple-700' : 'purple-200'}`,
      orange: `bg-${isDark ? 'orange-800' : 'orange-50'} text-${
        isDark ? 'orange-300' : 'orange-600'
      } border-${isDark ? 'orange-700' : 'orange-200'}`,
    };
    return colors[color as keyof typeof colors] || colors.blue;
  };

  const cardBgClass = isDark
    ? 'bg-gray-900 border-gray-700 text-white'
    : 'bg-white border-gray-200 text-gray-900';

  return (
    <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6">
      {statItems.map((item, index) => {
        const Icon = item.icon;
        return (
          <div
            key={index}
            className={`rounded-xl border p-6 hover:shadow-md transition-shadow ${cardBgClass}`}
          >
            <div className="flex items-center justify-between mb-4">
              <div className={`p-3 rounded-lg ${getColorClasses(item.color)}`}>
                <Icon className="w-6 h-6" />
              </div>
              <span
                className={`text-sm font-medium px-2 py-1 rounded ${
                  isDark
                    ? 'bg-gray-800 text-green-400'
                    : 'bg-green-50 text-green-600'
                }`}
              >
                {item.change}
              </span>
            </div>
            <div>
              <p
                className={`text-2xl font-bold mb-1 ${
                  isDark ? 'text-white' : 'text-gray-900'
                }`}
              >
                {item.value || '0'}
              </p>
              <p
                className={`text-sm ${
                  isDark ? 'text-gray-300' : 'text-gray-600'
                }`}
              >
                {item.label}
              </p>
            </div>
          </div>
        );
      })}
    </div>
  );
};

export default StatsGrid;