import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../models/models.dart';
import '../bloc/navigation_bloc.dart';

class BottomNav extends StatelessWidget {
  const BottomNav({super.key});

  @override
  Widget build(BuildContext context) {
    final colorScheme = Theme.of(context).colorScheme;

    return BlocBuilder<NavigationBloc, NavigationState>(
      builder: (context, state) {
        final currentIndex = switch (state.screen) {
          AppScreen.library ||
          AppScreen.details ||
          AppScreen.addBook ||
          AppScreen.scanner => 0,
          AppScreen.categories => 1,
          AppScreen.wishlist => 2,
          AppScreen.settings => 3,
        };

        return Container(
          decoration: BoxDecoration(
            color: colorScheme.surface,
            border: Border(
              top: BorderSide(color: colorScheme.outlineVariant, width: 1),
            ),
            boxShadow: [
              BoxShadow(
                color: colorScheme.shadow,
                blurRadius: 8,
                offset: const Offset(0, -2),
              ),
            ],
          ),
          child: BottomNavigationBar(
            currentIndex: currentIndex,
            backgroundColor: Colors.transparent,
            elevation: 0,
            selectedItemColor: colorScheme.primary,
            unselectedItemColor: colorScheme.onSurface.withValues(alpha: 0.6),
            onTap: (index) {
              final screen = [
                AppScreen.library,
                AppScreen.categories,
                AppScreen.wishlist,
                AppScreen.settings,
              ][index];
              context.read<NavigationBloc>().add(NavigateTo(screen));
            },
            items: const [
              BottomNavigationBarItem(
                icon: Icon(Icons.local_library),
                label: 'Библиотека',
              ),
              BottomNavigationBarItem(
                icon: Icon(Icons.category),
                label: 'Категории',
              ),
              BottomNavigationBarItem(
                icon: Icon(Icons.bookmark),
                label: 'Избранное',
              ),
              BottomNavigationBarItem(
                icon: Icon(Icons.settings),
                label: 'Настройки',
              ),
            ],
          ),
        );
      },
    );
  }
}