/// Écran de détail d'une session.
///
/// Affiche la visualisation complète d'une session sauvegardée :
/// image de la cible avec overlay des impacts, scores recalculés,
/// statistiques de groupement et lien vers les statistiques détaillées.
library;

import 'dart:io';
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:intl/intl.dart';
import '../../core/constants/app_constants.dart';
import '../../core/theme/app_theme.dart';
import '../../data/models/session.dart';
import '../../data/repositories/session_repository.dart';
import '../../services/score_calculator_service.dart';
import '../../services/grouping_analyzer_service.dart';
import '../analysis/widgets/target_overlay.dart';
import '../analysis/widgets/score_card.dart';
import '../analysis/widgets/grouping_stats.dart';
import '../statistics/statistics_screen.dart';

class SessionDetailScreen extends StatelessWidget {
  final Session session;

  const SessionDetailScreen({
    super.key,
    required this.session,
  });

  @override
  Widget build(BuildContext context) {
    final scoreCalculator = context.read<ScoreCalculatorService>();
    final groupingAnalyzer = context.read<GroupingAnalyzerService>();

    final scoreResult = scoreCalculator.calculateScores(
      shots: session.shots,
      targetType: session.targetType,
      targetCenterX: session.targetCenterX ?? 0.5,
      targetCenterY: session.targetCenterY ?? 0.5,
      targetRadius: session.targetRadius ?? 0.4,
    );

    final groupingResult = groupingAnalyzer.analyzeGrouping(session.shots);

    return Scaffold(
      appBar: AppBar(
        title: Text(
          DateFormat('dd/MM/yyyy HH:mm').format(session.createdAt),
        ),
        actions: [
          IconButton(
            icon: const Icon(Icons.analytics),
            onPressed: () => Navigator.push(
              context,
              MaterialPageRoute(
                builder: (_) => StatisticsScreen(singleSession: session),
              ),
            ),
            tooltip: 'Statistiques',
          ),
          IconButton(
            icon: const Icon(Icons.delete),
            onPressed: () => _confirmDelete(context),
            tooltip: 'Supprimer',
          ),
        ],
      ),
      body: SingleChildScrollView(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            // Target image with overlay
            AspectRatio(
              aspectRatio: 1,
              child: Stack(
                fit: StackFit.expand,
                children: [
                  if (File(session.imagePath).existsSync())
                    Image.file(
                      File(session.imagePath),
                      fit: BoxFit.contain,
                    )
                  else
                    Container(
                      color: Colors.grey[200],
                      child: const Center(
                        child: Icon(Icons.image_not_supported, size: 64),
                      ),
                    ),
                  TargetOverlay(
                    shots: session.shots,
                    targetCenterX: session.targetCenterX ?? 0.5,
                    targetCenterY: session.targetCenterY ?? 0.5,
                    targetRadius: session.targetRadius ?? 0.4,
                    targetType: session.targetType,
                    groupingCenterX: session.groupingCenterX,
                    groupingCenterY: session.groupingCenterY,
                    groupingDiameter: session.groupingDiameter,
                  ),
                ],
              ),
            ),

            Padding(
              padding: const EdgeInsets.all(AppConstants.defaultPadding),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  // Session info
                  _buildSessionInfo(context),
                  const SizedBox(height: 12),

                  // Score card
                  ScoreCard(
                    totalScore: session.totalScore,
                    shotCount: session.shotCount,
                    scoreResult: scoreResult,
                    targetType: session.targetType,
                  ),
                  const SizedBox(height: 12),

                  // Grouping stats
                  if (session.shotCount > 1)
                    GroupingStats(
                      groupingResult: groupingResult,
                      targetCenterX: session.targetCenterX ?? 0.5,
                      targetCenterY: session.targetCenterY ?? 0.5,
                    ),

                  // Notes
                  if (session.notes != null && session.notes!.isNotEmpty) ...[
                    const SizedBox(height: 12),
                    _buildNotesCard(context),
                  ],
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildSessionInfo(BuildContext context) {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(AppConstants.defaultPadding),
        child: Row(
          children: [
            Icon(
              session.targetType == session.targetType
                  ? Icons.track_changes
                  : Icons.person,
              color: AppTheme.primaryColor,
            ),
            const SizedBox(width: 12),
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(
                    session.targetType.displayName,
                    style: Theme.of(context).textTheme.titleMedium?.copyWith(
                      fontWeight: FontWeight.bold,
                    ),
                  ),
                  Text(
                    DateFormat('EEEE dd MMMM yyyy, HH:mm', 'fr_FR')
                        .format(session.createdAt),
                    style: Theme.of(context).textTheme.bodySmall,
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildNotesCard(BuildContext context) {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(AppConstants.defaultPadding),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Row(
              children: [
                const Icon(Icons.notes, color: AppTheme.primaryColor),
                const SizedBox(width: 8),
                Text(
                  'Notes',
                  style: Theme.of(context).textTheme.titleMedium?.copyWith(
                    fontWeight: FontWeight.bold,
                  ),
                ),
              ],
            ),
            const Divider(),
            Text(session.notes!),
          ],
        ),
      ),
    );
  }

  Future<void> _confirmDelete(BuildContext context) async {
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Supprimer'),
        content: const Text('Voulez-vous vraiment supprimer cette session?'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context, false),
            child: const Text('Annuler'),
          ),
          TextButton(
            onPressed: () => Navigator.pop(context, true),
            child: const Text(
              'Supprimer',
              style: TextStyle(color: AppTheme.errorColor),
            ),
          ),
        ],
      ),
    );

    if (confirmed == true && context.mounted) {
      try {
        final repository = context.read<SessionRepository>();
        await repository.deleteSession(session.id);
        if (context.mounted) {
          ScaffoldMessenger.of(context).showSnackBar(
            const SnackBar(content: Text('Session supprimee')),
          );
          Navigator.pop(context);
        }
      } catch (e) {
        if (context.mounted) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(
              content: Text('Erreur: $e'),
              backgroundColor: AppTheme.errorColor,
            ),
          );
        }
      }
    }
  }
}