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

/// Shell widget that provides bottom navigation for the app
class AppBottomNavShell extends StatelessWidget {
  const AppBottomNavShell({
    super.key,
    required this.child,
  });

  final Widget child;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: child,
      bottomNavigationBar: _AppBottomNavigationBar(),
    );
  }
}

class _AppBottomNavigationBar extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final location = GoRouterState.of(context).matchedLocation;

    // Determine current index based on location
    int currentIndex = 0;
    if (location == '/') {
      currentIndex = 0;
    } else if (location.startsWith('/products')) {
      currentIndex = 1;
    } else if (location.startsWith('/categories')) {
      currentIndex = 2;
    } else if (location.startsWith('/settings')) {
      currentIndex = 3;
    }

    return NavigationBar(
      selectedIndex: currentIndex,
      onDestinationSelected: (index) {
        switch (index) {
          case 0:
            context.go('/');
            break;
          case 1:
            context.go('/products');
            break;
          case 2:
            context.go('/categories');
            break;
          case 3:
            context.go('/settings');
            break;
        }
      },
      destinations: const [
        NavigationDestination(
          icon: Icon(Icons.point_of_sale_outlined),
          selectedIcon: Icon(Icons.point_of_sale),
          label: 'Home',
        ),
        NavigationDestination(
          icon: Icon(Icons.inventory_2_outlined),
          selectedIcon: Icon(Icons.inventory_2),
          label: 'Products',
        ),
        NavigationDestination(
          icon: Icon(Icons.category_outlined),
          selectedIcon: Icon(Icons.category),
          label: 'Categories',
        ),
        NavigationDestination(
          icon: Icon(Icons.settings_outlined),
          selectedIcon: Icon(Icons.settings),
          label: 'Settings',
        ),
      ],
    );
  }
}