// ignore_for_file: deprecated_member_use, duplicate_ignore

import 'package:flutter/material.dart';
import '../home/home_screen.dart';
import '../recipes/recipes_screen.dart';
import '../favourites/favourites_screen.dart';
import '../session/session_screen.dart';
import 'app_router.dart';

/// Main navigation scaffold with bottom navigation bar and centered Add button.
class MainNavigationScaffold extends StatefulWidget {
  const MainNavigationScaffold({super.key});

  @override
  State<MainNavigationScaffold> createState() => _MainNavigationScaffoldState();
}

class _MainNavigationScaffoldState extends State<MainNavigationScaffold> {
  int _currentIndex = 0;

  void _onItemTapped(int index) {
    setState(() {
      _currentIndex = index;
    });
  }

  void _onAddRecipePressed(BuildContext context) {
    Navigator.pushNamed(context, AppRoutes.addRecipe);
  }

  Widget _buildScreen(int index) {
    switch (index) {
      case 0:
        return const HomeScreen();
      case 1:
        return const RecipesScreen();
      case 2:
        return const FavouritesScreen();
      case 3:
        return const SessionScreen();
      default:
        return const SizedBox();
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: IndexedStack(
        index: _currentIndex,
        children: List.generate(4, (index) => _buildScreen(index)),
      ),
      bottomNavigationBar: _buildCustomBottomNav(context),
    );
  }

  Widget _buildCustomBottomNav(BuildContext context) {
    return Container(
      decoration: BoxDecoration(
        color: Theme.of(context).bottomNavigationBarTheme.backgroundColor ??
            Theme.of(context).scaffoldBackgroundColor,
        boxShadow: [
          BoxShadow(
            color: Colors.black.withOpacity(0.1),
            blurRadius: 4,
            offset: const Offset(0, -2),
          ),
        ],
      ),
      child: SafeArea(
        child: Container(
          height: kBottomNavigationBarHeight,
          padding: const EdgeInsets.symmetric(horizontal: 8),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceAround,
            children: [
              // Home
              _buildNavItem(
                icon: Icons.home,
                label: 'Home',
                index: 0,
                onTap: () => _onItemTapped(0),
              ),
              // Recipes
              _buildNavItem(
                icon: Icons.menu_book,
                label: 'Recipes',
                index: 1,
                onTap: () => _onItemTapped(1),
              ),
              // Center Add Recipe button
              Container(
                width: 56,
                height: 56,
                margin: const EdgeInsets.only(bottom: 8),
                child: Material(
                  color: Theme.of(context).primaryColor,
                  shape: const CircleBorder(),
                  child: InkWell(
                    onTap: () => _onAddRecipePressed(context),
                    customBorder: const CircleBorder(),
                    child: const Icon(
                      Icons.add,
                      color: Colors.white,
                      size: 28,
                    ),
                  ),
                ),
              ),
              // Favourites
              _buildNavItem(
                icon: Icons.favorite,
                label: 'Favourites',
                index: 2,
                onTap: () => _onItemTapped(2),
              ),
              // User
              _buildNavItem(
                icon: Icons.person,
                label: 'User',
                index: 3,
                onTap: () => _onItemTapped(3),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildNavItem({
    required IconData icon,
    required String label,
    required int index,
    required VoidCallback onTap,
  }) {
    final isSelected = _currentIndex == index;
    return Expanded(
      child: Material(
        color: Colors.transparent,
        child: InkWell(
          onTap: onTap,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Icon(
                icon,
                color: isSelected
                    ? Theme.of(context).primaryColor
                    : Theme.of(context).iconTheme.color?.withOpacity(0.6),
                size: 24,
              ),
              const SizedBox(height: 4),
              Text(
                label,
                style: TextStyle(
                  fontSize: 12,
                  color: isSelected
                      ? Theme.of(context).primaryColor
                      // ignore: deprecated_member_use
                      : Theme.of(context)
                          .textTheme
                          .bodySmall
                          ?.color
                          ?.withOpacity(0.6),
                  fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}