import 'package:flutter_riverpod/flutter_riverpod.dart';

/// Navigation state
class NavigationState {
  final String currentPage;

  const NavigationState({
    this.currentPage = 'home',
  });

  NavigationState copyWith({String? currentPage}) {
    return NavigationState(
      currentPage: currentPage ?? this.currentPage,
    );
  }
}

/// Navigation notifier
class NavigationNotifier extends StateNotifier<NavigationState> {
  NavigationNotifier() : super(const NavigationState());

  void navigateTo(String page) {
    if (state.currentPage != page) {
      state = state.copyWith(currentPage: page);
    }
  }

  void goBack() {
    // Simple navigation: always go to home
    state = const NavigationState(currentPage: 'home');
  }
}

/// Navigation provider
final navigationProvider =
    StateNotifierProvider<NavigationNotifier, NavigationState>((ref) {
  return NavigationNotifier();
});

/// Current page provider
final currentPageProvider = navigationProvider.select((state) => state.currentPage);