import 'package:flutter/material.dart';
import '../../../../core/models/membre_model.dart';
import '../../../../shared/theme/app_theme.dart';

/// Widget de statistiques pour la liste des membres
class MembresStatsOverview extends StatelessWidget {
  final List<MembreModel> membres;
  final String searchQuery;

  const MembresStatsOverview({
    super.key,
    required this.membres,
    this.searchQuery = '',
  });

  @override
  Widget build(BuildContext context) {
    final stats = _calculateStats();
    
    return Container(
      margin: const EdgeInsets.fromLTRB(16, 0, 16, 16),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: Colors.white,
        borderRadius: BorderRadius.circular(12),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.05),
            blurRadius: 10,
            offset: const Offset(0, 2),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // En-tête
          Row(
            children: [
              Container(
                padding: const EdgeInsets.all(8),
                decoration: BoxDecoration(
                  color: AppTheme.primaryColor.withOpacity(0.1),
                  borderRadius: BorderRadius.circular(8),
                ),
                child: Icon(
                  Icons.analytics,
                  color: AppTheme.primaryColor,
                  size: 20,
                ),
              ),
              const SizedBox(width: 12),
              const Text(
                'Vue d\'ensemble',
                style: TextStyle(
                  fontSize: 16,
                  fontWeight: FontWeight.w600,
                  color: AppTheme.textPrimary,
                ),
              ),
              const Spacer(),
              if (searchQuery.isNotEmpty)
                Container(
                  padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                  decoration: BoxDecoration(
                    color: AppTheme.infoColor.withOpacity(0.1),
                    borderRadius: BorderRadius.circular(12),
                  ),
                  child: Text(
                    'Filtré',
                    style: TextStyle(
                      fontSize: 12,
                      color: AppTheme.infoColor,
                      fontWeight: FontWeight.w500,
                    ),
                  ),
                ),
            ],
          ),
          const SizedBox(height: 16),
          
          // Statistiques principales
          Row(
            children: [
              Expanded(
                child: _buildStatCard(
                  'Total',
                  stats['total'].toString(),
                  Icons.people,
                  AppTheme.primaryColor,
                ),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: _buildStatCard(
                  'Actifs',
                  stats['actifs'].toString(),
                  Icons.check_circle,
                  AppTheme.successColor,
                ),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: _buildStatCard(
                  'Âge moyen',
                  '${stats['ageMoyen']} ans',
                  Icons.cake,
                  AppTheme.warningColor,
                ),
              ),
            ],
          ),
          
          if (stats['total'] > 0) ...[
            const SizedBox(height: 16),
            
            // Statistiques détaillées
            Row(
              children: [
                Expanded(
                  child: _buildDetailedStat(
                    'Nouveaux (30j)',
                    stats['nouveaux'].toString(),
                    stats['nouveauxPourcentage'],
                    AppTheme.infoColor,
                  ),
                ),
                const SizedBox(width: 16),
                Expanded(
                  child: _buildDetailedStat(
                    'Anciens (>1an)',
                    stats['anciens'].toString(),
                    stats['anciensPourcentage'],
                    AppTheme.secondaryColor,
                  ),
                ),
              ],
            ),
          ],
        ],
      ),
    );
  }

  Map<String, dynamic> _calculateStats() {
    if (membres.isEmpty) {
      return {
        'total': 0,
        'actifs': 0,
        'ageMoyen': 0,
        'nouveaux': 0,
        'nouveauxPourcentage': 0.0,
        'anciens': 0,
        'anciensPourcentage': 0.0,
      };
    }

    final now = DateTime.now();
    final total = membres.length;
    final actifs = membres.where((m) => m.statut.toUpperCase() == 'ACTIF').length;
    
    // Calcul de l'âge moyen
    final ages = membres.map((m) => m.age).where((age) => age > 0).toList();
    final ageMoyen = ages.isNotEmpty ? (ages.reduce((a, b) => a + b) / ages.length).round() : 0;
    
    // Nouveaux membres (moins de 30 jours)
    final nouveaux = membres.where((m) {
      final daysDiff = now.difference(m.dateAdhesion).inDays;
      return daysDiff <= 30;
    }).length;
    final nouveauxPourcentage = total > 0 ? (nouveaux / total * 100) : 0.0;
    
    // Anciens membres (plus d'un an)
    final anciens = membres.where((m) {
      final daysDiff = now.difference(m.dateAdhesion).inDays;
      return daysDiff > 365;
    }).length;
    final anciensPourcentage = total > 0 ? (anciens / total * 100) : 0.0;

    return {
      'total': total,
      'actifs': actifs,
      'ageMoyen': ageMoyen,
      'nouveaux': nouveaux,
      'nouveauxPourcentage': nouveauxPourcentage,
      'anciens': anciens,
      'anciensPourcentage': anciensPourcentage,
    };
  }

  Widget _buildStatCard(String label, String value, IconData icon, Color color) {
    return Container(
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: color.withOpacity(0.1),
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: color.withOpacity(0.2)),
      ),
      child: Column(
        children: [
          Icon(icon, color: color, size: 20),
          const SizedBox(height: 4),
          Text(
            value,
            style: TextStyle(
              fontSize: 16,
              fontWeight: FontWeight.bold,
              color: color,
            ),
          ),
          Text(
            label,
            style: const TextStyle(
              fontSize: 12,
              color: AppTheme.textSecondary,
            ),
            textAlign: TextAlign.center,
          ),
        ],
      ),
    );
  }

  Widget _buildDetailedStat(String label, String value, double percentage, Color color) {
    return Container(
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: Colors.grey[50],
        borderRadius: BorderRadius.circular(8),
        border: Border.all(color: Colors.grey[200]!),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Container(
                width: 8,
                height: 8,
                decoration: BoxDecoration(
                  color: color,
                  shape: BoxShape.circle,
                ),
              ),
              const SizedBox(width: 8),
              Text(
                label,
                style: const TextStyle(
                  fontSize: 12,
                  color: AppTheme.textSecondary,
                ),
              ),
            ],
          ),
          const SizedBox(height: 4),
          Row(
            children: [
              Text(
                value,
                style: const TextStyle(
                  fontSize: 18,
                  fontWeight: FontWeight.bold,
                  color: AppTheme.textPrimary,
                ),
              ),
              const SizedBox(width: 8),
              Text(
                '(${percentage.toStringAsFixed(1)}%)',
                style: TextStyle(
                  fontSize: 12,
                  color: color,
                  fontWeight: FontWeight.w500,
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }
}