/// Écran d'accueil - Dashboard principal de l'application.
///
/// Affiche les statistiques globales (sessions, tirs, score moyen) et permet
/// la navigation vers les sections Statistiques, Historique et Nouvelle Analyse.
library;

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../../core/constants/app_constants.dart';
import '../../core/theme/app_theme.dart';
import '../../data/repositories/session_repository.dart';
import '../capture/capture_screen.dart';
import '../history/history_screen.dart';
import '../statistics/statistics_screen.dart';
import 'widgets/stats_card.dart';

class HomeScreen extends StatefulWidget {
  const HomeScreen({super.key});

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  Map<String, dynamic>? _stats;
  bool _isLoading = true;

  @override
  void initState() {
    super.initState();
    _loadStats();
  }

  Future<void> _loadStats() async {
    final repository = context.read<SessionRepository>();
    final stats = await repository.getStatistics();
    if (mounted) {
      setState(() {
        _stats = stats;
        _isLoading = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Bully'),
        actions: [
          IconButton(
            icon: const Icon(Icons.analytics),
            onPressed: () => _navigateToStatistics(context),
            tooltip: 'Statistiques',
          ),
          IconButton(
            icon: const Icon(Icons.history),
            onPressed: () => _navigateToHistory(context),
            tooltip: 'Historique',
          ),
        ],
      ),
      body: RefreshIndicator(
        onRefresh: _loadStats,
        child: SingleChildScrollView(
          physics: const AlwaysScrollableScrollPhysics(),
          padding: const EdgeInsets.all(AppConstants.defaultPadding),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              // App logo/header
              _buildHeader(),
              const SizedBox(height: AppConstants.largePadding),

              // Main action button
              _buildMainActionButton(context),
              const SizedBox(height: AppConstants.largePadding),

              // Statistics section
              if (_isLoading)
                const Center(child: CircularProgressIndicator())
              else if (_stats != null)
                _buildStatsSection(),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildHeader() {
    return Column(
      children: [
        Container(
          padding: const EdgeInsets.all(24),
          decoration: BoxDecoration(
            color: AppTheme.primaryColor.withValues(alpha: 0.1),
            shape: BoxShape.circle,
          ),
          child: const Icon(
            Icons.track_changes,
            size: 64,
            color: AppTheme.primaryColor,
          ),
        ),
        const SizedBox(height: 16),
        Text(
          'Analyse de Cibles',
          style: Theme.of(context).textTheme.headlineMedium?.copyWith(
            fontWeight: FontWeight.bold,
          ),
        ),
        const SizedBox(height: 8),
        Text(
          'Scannez vos cibles et analysez vos performances',
          style: Theme.of(context).textTheme.bodyLarge?.copyWith(
            color: AppTheme.textSecondary,
          ),
          textAlign: TextAlign.center,
        ),
      ],
    );
  }

  Widget _buildMainActionButton(BuildContext context) {
    return ElevatedButton.icon(
      onPressed: () => _navigateToCapture(context),
      style: ElevatedButton.styleFrom(
        backgroundColor: AppTheme.primaryColor,
        foregroundColor: Colors.white,
        padding: const EdgeInsets.symmetric(vertical: 20),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(AppConstants.borderRadius),
        ),
      ),
      icon: const Icon(Icons.add_a_photo, size: 28),
      label: const Text(
        'Nouvelle Analyse',
        style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
      ),
    );
  }

  Widget _buildStatsSection() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Text(
          'Statistiques',
          style: Theme.of(context).textTheme.titleLarge?.copyWith(
            fontWeight: FontWeight.bold,
          ),
        ),
        const SizedBox(height: 12),
        Row(
          children: [
            Expanded(
              child: StatsCard(
                icon: Icons.assessment,
                title: 'Sessions',
                value: '${_stats!['totalSessions']}',
                color: AppTheme.primaryColor,
              ),
            ),
            const SizedBox(width: 12),
            Expanded(
              child: StatsCard(
                icon: Icons.gps_fixed,
                title: 'Tirs',
                value: '${_stats!['totalShots']}',
                color: AppTheme.secondaryColor,
              ),
            ),
          ],
        ),
        const SizedBox(height: 12),
        Row(
          children: [
            Expanded(
              child: StatsCard(
                icon: Icons.trending_up,
                title: 'Score Moyen',
                value: (_stats!['averageScore'] as double).toStringAsFixed(1),
                color: AppTheme.warningColor,
              ),
            ),
            const SizedBox(width: 12),
            Expanded(
              child: StatsCard(
                icon: Icons.emoji_events,
                title: 'Meilleur',
                value: '${_stats!['bestScore']}',
                color: AppTheme.successColor,
              ),
            ),
          ],
        ),
      ],
    );
  }

  void _navigateToCapture(BuildContext context) async {
    await Navigator.push(
      context,
      MaterialPageRoute(builder: (_) => const CaptureScreen()),
    );
    // Refresh stats when returning
    _loadStats();
  }

  void _navigateToHistory(BuildContext context) async {
    await Navigator.push(
      context,
      MaterialPageRoute(builder: (_) => const HistoryScreen()),
    );
    // Refresh stats when returning
    _loadStats();
  }

  void _navigateToStatistics(BuildContext context) async {
    await Navigator.push(
      context,
      MaterialPageRoute(builder: (_) => const StatisticsScreen()),
    );
    // Refresh stats when returning
    _loadStats();
  }
}