import 'package:flutter/material.dart';

/// Barre principale du dashboard admin : 2 onglets (Gestion des utilisateurs | Paramètres) + infos utilisateur.
class DashboardAppBarAdmin extends StatelessWidget implements PreferredSizeWidget {
  final int selectedIndex;
  final ValueChanged<int> onTabChange;

  const DashboardAppBarAdmin({
    Key? key,
    required this.selectedIndex,
    required this.onTabChange,
  }) : super(key: key);

  @override
  Size get preferredSize => const Size.fromHeight(kToolbarHeight + 10);

  @override
  Widget build(BuildContext context) {
    return AppBar(
      elevation: 0,
      automaticallyImplyLeading: false,
      title: Row(
        children: [
          const SizedBox(width: 24),
          Image.asset(
            'assets/images/logo.png',
            height: 40,
            fit: BoxFit.contain,
          ),
          Expanded(
            child: Center(
              child: Row(
                mainAxisSize: MainAxisSize.min,
                children: [
                  _buildNavItem(context, 'Gestion des utilisateurs', 0),
                  const SizedBox(width: 24),
                  _buildNavItem(context, 'Paramètres', 1),
                ],
              ),
            ),
          ),
        ],
      ),
      actions: [
        const Padding(
          padding: EdgeInsets.symmetric(horizontal: 16),
          child: Center(
            child: Text(
              'Admin',
              style: TextStyle(
                color: Colors.black,
                fontSize: 16,
                fontWeight: FontWeight.w500,
              ),
            ),
          ),
        ),
        Padding(
          padding: const EdgeInsets.only(right: 16),
          child: TextButton(
            onPressed: () => _handleLogout(context),
            style: TextButton.styleFrom(
              backgroundColor: const Color(0xFF9CC5C0),
              foregroundColor: Colors.white,
              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
              shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(5),
              ),
            ),
            child: const Text('Se déconnecter'),
          ),
        ),
      ],
    );
  }

  Widget _buildNavItem(BuildContext context, String title, int index) {
    final bool isActive = index == selectedIndex;
    return InkWell(
      onTap: () => onTabChange(index),
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
        decoration: BoxDecoration(
          color: isActive ? const Color(0xFF9CC5C0) : Colors.transparent,
          borderRadius: BorderRadius.circular(20),
          border: isActive ? null : Border.all(color: Colors.black26),
        ),
        child: Text(
          title,
          style: TextStyle(
            color: isActive ? Colors.white : Colors.black,
            fontWeight: isActive ? FontWeight.w600 : FontWeight.normal,
            fontSize: 14,
          ),
        ),
      ),
    );
  }

  void _handleLogout(BuildContext context) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('Déconnexion'),
        content: const Text('Êtes-vous sûr de vouloir vous déconnecter ?'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('Annuler'),
          ),
          ElevatedButton(
            onPressed: () {
              Navigator.pop(context);
              // TODO: Implémenter la logique de déconnexion
            },
            child: const Text('Déconnecter'),
          ),
        ],
      ),
    );
  }
}

/// Sous-barre affichée quand "Gestion des utilisateurs" est actif : 4 onglets sans infos utilisateur.
class DashboardUserManagementSubBar extends StatelessWidget {
  final int selectedSubIndex;
  final ValueChanged<int> onSubTabChange;

  const DashboardUserManagementSubBar({
    Key? key,
    required this.selectedSubIndex,
    required this.onSubTabChange,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Container(
      height: 48,
      decoration: BoxDecoration(
        color: Colors.grey.shade100,
        border: Border(bottom: BorderSide(color: Colors.grey.shade300)),
      ),
      padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 6),
      child: Center(
        child: Row(
          mainAxisSize: MainAxisSize.min,
          children: [
            _buildSubNavItem(context, 'Gestionnaires', 0),
            const SizedBox(width: 16),
            _buildSubNavItem(context, 'Parents', 1),
            const SizedBox(width: 16),
            _buildSubNavItem(context, 'Assistantes maternelles', 2),
            const SizedBox(width: 16),
            _buildSubNavItem(context, 'Administrateurs', 3),
          ],
        ),
      ),
    );
  }

  Widget _buildSubNavItem(BuildContext context, String title, int index) {
    final bool isActive = index == selectedSubIndex;
    return InkWell(
      onTap: () => onSubTabChange(index),
      child: Container(
        padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 6),
        decoration: BoxDecoration(
          color: isActive ? const Color(0xFF9CC5C0) : Colors.transparent,
          borderRadius: BorderRadius.circular(16),
          border: isActive ? null : Border.all(color: Colors.black26),
        ),
        child: Text(
          title,
          style: TextStyle(
            color: isActive ? Colors.white : Colors.black87,
            fontWeight: isActive ? FontWeight.w600 : FontWeight.normal,
            fontSize: 13,
          ),
        ),
      ),
    );
  }
}