# All files / src/pages Stats.tsx

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     import React, { useState, useEffect } from 'react';
    import StatsOverview from '../components/stats/StatsOverview';
    import PnLChart from '../components/stats/PnLChart';
    import CLVSummaryCard from '../components/stats/CLVSummaryCard';
    import { BetStats } from '../types/game.types';
    import api from '../services/api';
    import { formatCurrency, formatPercentage, getSportDisplayName } from '../utils/format';

    interface SportBreakdown {
      sport: string;
      bets: number;
      won: number;
      lost: number;
      winRate: number;
      pnl: number;
    }

    interface BetTypeBreakdown {
      betType: string;
      bets: number;
      won: number;
      lost: number;
      winRate: number;
      pnl: number;
    }

    export default function Stats() {
      const [stats, setStats] = useState<BetStats | null>(null);
      const [pnlData, setPnlData] = useState<any[]>([]);
      const [sportBreakdown, setSportBreakdown] = useState<SportBreakdown[]>([]);
      const [betTypeBreakdown, setBetTypeBreakdown] = useState<BetTypeBreakdown[]>([]);
      const [loading, setLoading] = useState(true);
      const [error, setError] = useState<string | null>(null);

      // Date range filter
      const [dateRange, setDateRange] = useState<'7d' | '30d' | '90d' | 'all'>('30d');

      // Fetch stats
      const fetchStats = async () => {
        setLoading(true);
        setError(null);

        try {
          const params: any = {};

          // Calculate date range
          if (dateRange !== 'all') {
            const days = parseInt(dateRange);
            const startDate = new Date();
            startDate.setDate(startDate.getDate() - days);
            params.startDate = startDate.toISOString();
          }

          const response = await api.get('/bets/stats', { params });
          const apiStats = response.data.data; // Access nested data from {status, data} response
          setStats(apiStats);

          // Map sport breakdown from API response
          const sportStats = Object.entries(apiStats.bySport || {}).map(([sport, data]: [string, any]) => {
            const settledBets = data.won + (data.count - data.won);
            const lost = data.count - data.won;
            const winRate = settledBets > 0 ? (data.won / settledBets) * 100 : 0;

            return {
              sport,
              bets: data.count,
              won: data.won,
              lost,
              winRate: Math.round(winRate * 10) / 10,
              pnl: Math.round(data.netProfit * 100) / 100
            };
          });
          setSportBreakdown(sportStats);

          // Map bet type breakdown from API response
          const betTypeStats = Object.entries(apiStats.byBetType || {}).map(([betType, data]: [string, any]) => {
            const settledBets = data.won + (data.count - data.won);
            const lost = data.count - data.won;
            const winRate = settledBets > 0 ? (data.won / settledBets) * 100 : 0;

            return {
              betType,
              bets: data.count,
              won: data.won,
              lost,
              winRate: Math.round(winRate * 10) / 10,
              pnl: Math.round(data.netProfit * 100) / 100
            };
          });
          setBetTypeBreakdown(betTypeStats);

          // For P&L chart, we'd need daily bet history
          // For now, generate from available data (simplified)
          // TODO: Add daily P&L tracking in backend
          setPnlData([
            { date: new Date().toISOString().split('T')[0], pnl: apiStats.netProfit, cumulativePnl: apiStats.netProfit }
          ]);

          setError(null);
        } catch (err: any) {
          console.error('Error fetching stats:', err);
          setError(err.response?.data?.message || 'Failed to load statistics');
        } finally {
          setLoading(false);
        }
      };

      useEffect(() => {
        fetchStats();
      }, [dateRange]);

      if (loading) {
        return (
          <div className="min-h-screen bg-gray-50 py-8 px-4 sm:px-6 lg:px-8">
            <div className="max-w-7xl mx-auto">
              <div className="h-8 w-48 bg-gray-200 rounded animate-pulse mb-8"></div>
              <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6 mb-8">
                {[1, 2, 3, 4].map((i) => (
                  <div key={i} className="bg-white rounded-lg shadow-md p-6 h-32 animate-pulse">
                    <div className="h-4 bg-gray-200 rounded w-1/2 mb-4"></div>
                    <div className="h-8 bg-gray-200 rounded w-3/4"></div>
                  </div>
                ))}
              </div>
            </div>
          </div>
        );
      }

      if (error || !stats) {
        return (
          <div className="min-h-screen bg-gray-50 py-8 px-4 sm:px-6 lg:px-8">
            <div className="max-w-7xl mx-auto">
              <div className="bg-red-50 border border-red-200 rounded-lg p-6 text-center">
                <p className="text-red-800 mb-4">{error || 'Failed to load statistics'}</p>
                <button
                  onClick={fetchStats}
                  className="px-6 py-2 bg-red-600 text-white rounded-lg hover:bg-red-700 transition-colors"
                >
                  Retry
                </button>
              </div>
            </div>
          </div>
        );
      }

      return (
        <div className="min-h-screen bg-gray-50 dark:bg-gray-900 py-8 px-4 sm:px-6 lg:px-8 transition-colors">
          <div className="max-w-7xl mx-auto">
            {/* Header */}
            <div className="mb-8 flex flex-col sm:flex-row items-start sm:items-center justify-between gap-4">
              <div>
                <h1 className="text-3xl font-display font-bold text-gray-900 dark:text-white text-shadow-pixel tracking-wide">STATISTICS</h1>
                <p className="mt-2 text-gray-600 dark:text-gray-400">
                  Analyze your betting performance
                </p>
              </div>

              {/* Date Range Filter */}
              <div className="flex gap-2">
                {(['7d', '30d', '90d', 'all'] as const).map((range) => (
                  <button
                    key={range}
                    onClick={() => setDateRange(range)}
                    className={`
                      px-4 py-2 rounded-lg font-medium text-sm transition-all
                      ${
                        dateRange === range
                          ? 'bg-brand-600 text-white shadow-md'
                          : 'bg-white dark:bg-gray-800 text-gray-700 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-700 border border-gray-200 dark:border-gray-600'
                      }
                    `}
                  >
                    {range === 'all' ? 'All Time' : range.toUpperCase()}
                  </button>
                ))}
              </div>
            </div>

            {/* Overview Cards */}
            <div className="mb-8">
              <StatsOverview stats={stats} />
            </div>

            {/* P&L Chart */}
            <div className="mb-8">
              <PnLChart data={pnlData} />
            </div>

            {/* CLV Summary Card */}
            <div className="mb-8">
              <CLVSummaryCard />
            </div>

            {/* Breakdown Tables */}
            <div className="grid grid-cols-1 lg:grid-cols-2 gap-6">
              {/* By Sport */}
              <div className="card p-6">
                <h3 className="font-display font-bold text-base uppercase tracking-widest text-gray-900 dark:text-white mb-4">By Sport</h3>
                <div className="overflow-x-auto">
                  <table className="w-full text-sm">
                    <thead>
                      <tr className="text-left text-gray-600 dark:text-gray-400 border-b border-gray-200 dark:border-gray-700">
                        <th className="pb-2 font-medium">Sport</th>
                        <th className="pb-2 font-medium text-center">Bets</th>
                        <th className="pb-2 font-medium text-center">Win Rate</th>
                        <th className="pb-2 font-medium text-right">P&L</th>
                      </tr>
                    </thead>
                    <tbody className="divide-y divide-gray-100 dark:divide-gray-700">
                      {sportBreakdown.map((row) => (
                        <tr key={row.sport}>
                          <td className="py-3 font-medium text-gray-900 dark:text-white">
                            {getSportDisplayName(row.sport)}
                          </td>
                          <td className="py-3 text-center text-gray-700 dark:text-gray-300">
                            {row.bets}
                          </td>
                          <td className="py-3 text-center text-gray-700 dark:text-gray-300">
                            {formatPercentage(row.winRate)}
                          </td>
                          <td className={`py-3 text-right font-semibold ${row.pnl >= 0 ? 'text-green-600' : 'text-red-600'}`}>
                            {formatCurrency(row.pnl)}
                          </td>
                        </tr>
                      ))}
                    </tbody>
                  </table>
                </div>
              </div>

              {/* By Bet Type */}
              <div className="card p-6">
                <h3 className="font-display font-bold text-base uppercase tracking-widest text-gray-900 dark:text-white mb-4">By Bet Type</h3>
                <div className="overflow-x-auto">
                  <table className="w-full text-sm">
                    <thead>
                      <tr className="text-left text-gray-600 dark:text-gray-400 border-b border-gray-200 dark:border-gray-700">
                        <th className="pb-2 font-medium">Type</th>
                        <th className="pb-2 font-medium text-center">Bets</th>
                        <th className="pb-2 font-medium text-center">Win Rate</th>
                        <th className="pb-2 font-medium text-right">P&L</th>
                      </tr>
                    </thead>
                    <tbody className="divide-y divide-gray-100 dark:divide-gray-700">
                      {betTypeBreakdown.map((row) => (
                        <tr key={row.betType}>
                          <td className="py-3 font-medium text-gray-900 dark:text-white capitalize">
                            {row.betType}
                          </td>
                          <td className="py-3 text-center text-gray-700 dark:text-gray-300">
                            {row.bets}
                          </td>
                          <td className="py-3 text-center text-gray-700 dark:text-gray-300">
                            {formatPercentage(row.winRate)}
                          </td>
                          <td className={`py-3 text-right font-semibold ${row.pnl >= 0 ? 'text-green-600' : 'text-red-600'}`}>
                            {formatCurrency(row.pnl)}
                          </td>
                        </tr>
                      ))}
                    </tbody>
                  </table>
                </div>
              </div>
            </div>
          </div>
        </div>
      );
    }