import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

import '../../../core/constants/design_system.dart';
import '../../../core/theme/theme_provider.dart';
import '../../../core/utils/page_transitions.dart';
import '../../../data/providers/user_provider.dart';
import '../../../data/services/secure_storage.dart';
import '../../widgets/animated_widgets.dart';
import '../../widgets/custom_snackbar.dart';
import '../notifications/notifications_screen.dart';
import '../settings/settings_screen.dart';
import 'edit_profile_screen.dart';

/// Écran de profil moderne et épuré.
class ProfileScreen extends StatelessWidget {
  const ProfileScreen({super.key});

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final userProvider = Provider.of<UserProvider>(context);
    final user = userProvider.user;
    final themeProvider = Provider.of<ThemeProvider>(context);

    return Scaffold(
      body: CustomScrollView(
        slivers: [
          // AppBar avec image de fond et avatar
          SliverAppBar(
            expandedHeight: 200,
            pinned: true,
            flexibleSpace: FlexibleSpaceBar(
              background: Stack(
                fit: StackFit.expand,
                children: [
                  // Fond dégradé
                  Container(
                    decoration: BoxDecoration(
                      gradient: LinearGradient(
                        begin: Alignment.topLeft,
                        end: Alignment.bottomRight,
                        colors: [
                          theme.colorScheme.primary,
                          theme.colorScheme.primary.withOpacity(0.7),
                        ],
                      ),
                    ),
                  ),
                  // Avatar centré
                  Align(
                    alignment: Alignment.bottomCenter,
                    child: Padding(
                      padding: const EdgeInsets.only(bottom: 16),
                      child: Hero(
                        tag: 'user_profile_avatar_${user.userId}',
                        child: Container(
                          decoration: BoxDecoration(
                            shape: BoxShape.circle,
                            border: Border.all(
                              color: theme.scaffoldBackgroundColor,
                              width: 4,
                            ),
                            boxShadow: [
                              BoxShadow(
                                color: Colors.black.withOpacity(0.2),
                                blurRadius: 10,
                                offset: const Offset(0, 4),
                              ),
                            ],
                          ),
                          child: CircleAvatar(
                            radius: 50,
                            backgroundImage: user.profileImageUrl != null &&
                                    user.profileImageUrl!.isNotEmpty
                                ? NetworkImage(user.profileImageUrl!)
                                : null,
                            child: user.profileImageUrl == null ||
                                    user.profileImageUrl!.isEmpty
                                ? Icon(
                                    Icons.person_rounded,
                                    size: 50,
                                    color: theme.colorScheme.onPrimary,
                                  )
                                : null,
                          ),
                        ),
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ),

          // Contenu
          SliverToBoxAdapter(
            child: Column(
              children: [
                const SizedBox(height: DesignSystem.spacingLg),

                // Nom et email
                Text(
                  '${user.userFirstName} ${user.userLastName}',
                  style: theme.textTheme.headlineSmall?.copyWith(
                    fontWeight: FontWeight.bold,
                  ),
                ),
                const SizedBox(height: DesignSystem.spacingSm),
                Text(
                  user.email,
                  style: theme.textTheme.bodyMedium?.copyWith(
                    color: theme.colorScheme.onSurface.withOpacity(0.6),
                  ),
                ),

                const SizedBox(height: DesignSystem.spacingXl),

                // Bouton Éditer le profil
                Padding(
                  padding: DesignSystem.paddingHorizontal(DesignSystem.spacingXl),
                  child: SizedBox(
                    width: double.infinity,
                    child: ElevatedButton.icon(
                      onPressed: () {
                        context.pushSlideRight(EditProfileScreen(user: user));
                      },
                      icon: const Icon(Icons.edit_rounded, size: 18),
                      label: const Text('Éditer le profil'),
                      style: ElevatedButton.styleFrom(
                        padding: const EdgeInsets.symmetric(vertical: 12),
                        shape: RoundedRectangleBorder(
                          borderRadius: BorderRadius.circular(DesignSystem.radiusMd),
                        ),
                      ),
                    ),
                  ),
                ),

                const SizedBox(height: DesignSystem.spacingXl),

                // Statistiques
                _buildStatsRow(theme, user),

                const SizedBox(height: DesignSystem.spacingXl),

                // Sections
                Padding(
                  padding: DesignSystem.paddingHorizontal(DesignSystem.spacingLg),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      // Section Historique
                      _buildSectionHeader(theme, 'Historique'),
                      const SizedBox(height: DesignSystem.spacingSm),
                      _buildListTile(
                        context,
                        theme,
                        Icons.event_note_rounded,
                        'Historique des Événements',
                        () => context.showInfo('Historique des événements à venir'),
                      ),
                      _buildListTile(
                        context,
                        theme,
                        Icons.article_rounded,
                        'Historique des Publications',
                        () => context.showInfo('Historique des publications à venir'),
                      ),
                      _buildListTile(
                        context,
                        theme,
                        Icons.bookmark_rounded,
                        'Historique de Réservations',
                        () => context.showInfo('Historique des réservations à venir'),
                      ),

                      const SizedBox(height: DesignSystem.spacingXl),

                      // Section Paramètres
                      _buildSectionHeader(theme, 'Paramètres'),
                      const SizedBox(height: DesignSystem.spacingSm),
                      _buildListTile(
                        context,
                        theme,
                        Icons.privacy_tip_rounded,
                        'Confidentialité',
                        () => context.showInfo('Paramètres de confidentialité à venir'),
                      ),
                      _buildListTile(
                        context,
                        theme,
                        Icons.notifications_rounded,
                        'Notifications',
                        () => context.pushFadeScale(const NotificationsScreen()),
                      ),
                      _buildListTile(
                        context,
                        theme,
                        Icons.language_rounded,
                        'Langue',
                        () => context.showInfo('Sélection de langue à venir'),
                      ),
                      _buildSwitchTile(
                        context,
                        theme,
                        themeProvider.isDarkMode ? Icons.light_mode_rounded : Icons.dark_mode_rounded,
                        'Mode sombre',
                        themeProvider.isDarkMode,
                        (value) => themeProvider.toggleTheme(),
                      ),
                      _buildListTile(
                        context,
                        theme,
                        Icons.settings_rounded,
                        'Paramètres avancés',
                        () => context.pushSlideRight(const SettingsScreen()),
                      ),

                      const SizedBox(height: DesignSystem.spacingXl),

                      // Section Aide
                      _buildSectionHeader(theme, 'Aide & Support'),
                      const SizedBox(height: DesignSystem.spacingSm),
                      _buildListTile(
                        context,
                        theme,
                        Icons.help_rounded,
                        'Centre d\'aide',
                        () => context.showInfo('Centre d\'aide à venir'),
                      ),
                      _buildListTile(
                        context,
                        theme,
                        Icons.feedback_rounded,
                        'Envoyer un feedback',
                        () => context.showInfo('Formulaire de feedback à venir'),
                      ),
                      _buildListTile(
                        context,
                        theme,
                        Icons.info_rounded,
                        'À propos',
                        () => context.showInfo('À propos de l\'application'),
                      ),

                      const SizedBox(height: DesignSystem.spacingXl),

                      // Bouton Déconnexion
                      SizedBox(
                        width: double.infinity,
                        child: OutlinedButton.icon(
                          onPressed: () {
                            _showLogoutDialog(context);
                          },
                          icon: const Icon(Icons.logout_rounded, size: 18),
                          label: const Text('Se déconnecter'),
                          style: OutlinedButton.styleFrom(
                            foregroundColor: theme.colorScheme.error,
                            side: BorderSide(color: theme.colorScheme.error),
                            padding: const EdgeInsets.symmetric(vertical: 12),
                            shape: RoundedRectangleBorder(
                              borderRadius: BorderRadius.circular(DesignSystem.radiusMd),
                            ),
                          ),
                        ),
                      ),

                      const SizedBox(height: DesignSystem.spacingXl),
                    ],
                  ),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildStatsRow(ThemeData theme, dynamic user) {
    return Padding(
      padding: DesignSystem.paddingHorizontal(DesignSystem.spacingXl),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          _buildStatItem(theme, '0', 'Publications'),
          Container(
            height: 40,
            width: 1,
            color: theme.dividerColor,
          ),
          _buildStatItem(theme, '0', 'Amis'),
          Container(
            height: 40,
            width: 1,
            color: theme.dividerColor,
          ),
          _buildStatItem(theme, '0', 'Événements'),
        ],
      ),
    );
  }

  Widget _buildStatItem(ThemeData theme, String value, String label) {
    return Column(
      children: [
        Text(
          value,
          style: theme.textTheme.titleLarge?.copyWith(
            fontWeight: FontWeight.bold,
          ),
        ),
        const SizedBox(height: 4),
        Text(
          label,
          style: theme.textTheme.bodySmall?.copyWith(
            color: theme.colorScheme.onSurface.withOpacity(0.6),
            fontSize: 12,
          ),
        ),
      ],
    );
  }

  Widget _buildSectionHeader(ThemeData theme, String title) {
    return Text(
      title,
      style: theme.textTheme.titleMedium?.copyWith(
        fontWeight: FontWeight.bold,
        fontSize: 15,
      ),
    );
  }

  Widget _buildListTile(
    BuildContext context,
    ThemeData theme,
    IconData icon,
    String title,
    VoidCallback onTap,
  ) {
    return AnimatedCard(
      margin: const EdgeInsets.only(bottom: DesignSystem.spacingSm),
      borderRadius: DesignSystem.borderRadiusMd,
      elevation: 0.5,
      hoverElevation: 2,
      padding: const EdgeInsets.symmetric(
        horizontal: DesignSystem.spacingLg,
        vertical: DesignSystem.spacingMd,
      ),
      onTap: onTap,
      child: Row(
        children: [
          Icon(
            icon,
            size: 22,
            color: theme.colorScheme.primary,
          ),
          const SizedBox(width: DesignSystem.spacingLg),
          Expanded(
            child: Text(
              title,
              style: theme.textTheme.bodyMedium?.copyWith(
                fontSize: 14,
              ),
            ),
          ),
          Icon(
            Icons.chevron_right_rounded,
            size: 20,
            color: theme.colorScheme.onSurface.withOpacity(0.3),
          ),
        ],
      ),
    );
  }

  Widget _buildSwitchTile(
    BuildContext context,
    ThemeData theme,
    IconData icon,
    String title,
    bool value,
    ValueChanged<bool> onChanged,
  ) {
    return AnimatedCard(
      margin: const EdgeInsets.only(bottom: DesignSystem.spacingSm),
      borderRadius: DesignSystem.borderRadiusMd,
      elevation: 0.5,
      hoverElevation: 1,
      padding: const EdgeInsets.symmetric(
        horizontal: DesignSystem.spacingLg,
        vertical: DesignSystem.spacingSm,
      ),
      child: Row(
        children: [
          Icon(
            icon,
            size: 22,
            color: theme.colorScheme.primary,
          ),
          const SizedBox(width: DesignSystem.spacingLg),
          Expanded(
            child: Text(
              title,
              style: theme.textTheme.bodyMedium?.copyWith(
                fontSize: 14,
              ),
            ),
          ),
          Switch(
            value: value,
            onChanged: onChanged,
          ),
        ],
      ),
    );
  }

  void _showLogoutDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Déconnexion'),
        content: const Text('Êtes-vous sûr de vouloir vous déconnecter ?'),
        shape: RoundedRectangleBorder(
          borderRadius: BorderRadius.circular(DesignSystem.radiusMd),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('Annuler'),
          ),
          FilledButton(
            onPressed: () async {
              // Fermer le dialogue
              Navigator.pop(context);

              // Supprimer les informations de l'utilisateur du stockage sécurisé
              final secureStorage = SecureStorage();
              await secureStorage.deleteUserInfo();

              // Naviguer vers l'écran de connexion et supprimer toute la pile de navigation
              if (context.mounted) {
                Navigator.of(context).pushNamedAndRemoveUntil('/', (route) => false);
                context.showSuccess('Déconnexion effectuée');
              }
            },
            style: FilledButton.styleFrom(
              backgroundColor: Theme.of(context).colorScheme.error,
            ),
            child: const Text('Déconnecter'),
          ),
        ],
      ),
    );
  }
}