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

import '../../features/auth/data/auth_providers.dart';

class AppShell extends ConsumerWidget {
  final String location;
  final Widget child;

  const AppShell({
    super.key,
    required this.location,
    required this.child,
  });

  static const _destinations = [
    _AppDestination(
      path: '/recipes',
      title: 'Recept',
      icon: Icons.restaurant_menu,
      label: 'Recept',
    ),
    _AppDestination(
      path: '/inventory',
      title: 'Inventarie',
      icon: Icons.inventory_2_outlined,
      label: 'Inventarie',
    ),
    _AppDestination(
      path: '/matsedel',
      title: 'Matsedel',
      icon: Icons.calendar_month_outlined,
      label: 'Matsedel',
    ),
    _AppDestination(
      path: '/baslager',
      title: 'Baslager',
      icon: Icons.storefront_outlined,
      label: 'Baslager',
    ),
    _AppDestination(
      path: '/import',
      title: 'Importera',
      icon: Icons.upload_file_outlined,
      label: 'Importera',
    ),
    _AppDestination(
      path: '/profile',
      title: 'Profil',
      icon: Icons.person,
      label: 'Profil',
    ),
  ];

  int _selectedIndex() {
    final index = _destinations.indexWhere(
      (destination) => location.startsWith(destination.path),
    );
    return index < 0 ? 0 : index;
  }

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final selectedIndex = _selectedIndex();
    final selectedDestination = _destinations[selectedIndex];
    final isWide = MediaQuery.of(context).size.width >= 900;

    Future<void> logout() async {
      await ref.read(authStateProvider.notifier).logout();
      if (context.mounted) {
        context.go('/login');
      }
    }

    void navigateTo(int index) {
      final target = _destinations[index].path;
      if (target != location && context.mounted) {
        context.go(target);
      }
    }

    return Scaffold(
      appBar: AppBar(
        title: Text(selectedDestination.title),
        actions: [
          IconButton(
            tooltip: 'Logga ut',
            icon: const Icon(Icons.logout),
            onPressed: logout,
          ),
        ],
      ),
      body: isWide
          ? Row(
              children: [
                NavigationRail(
                  selectedIndex: selectedIndex,
                  onDestinationSelected: navigateTo,
                  labelType: NavigationRailLabelType.all,
                  destinations: _destinations
                      .map(
                        (destination) => NavigationRailDestination(
                          icon: Icon(destination.icon),
                          label: Text(destination.label),
                        ),
                      )
                      .toList(),
                ),
                const VerticalDivider(width: 1),
                Expanded(child: child),
              ],
            )
          : child,
      bottomNavigationBar: isWide
          ? null
          : NavigationBar(
              selectedIndex: selectedIndex,
              onDestinationSelected: navigateTo,
              destinations: _destinations
                  .map(
                    (destination) => NavigationDestination(
                      icon: Icon(destination.icon),
                      label: destination.label,
                    ),
                  )
                  .toList(),
            ),
    );
  }
}

class _AppDestination {
  final String path;
  final String title;
  final IconData icon;
  final String label;

  const _AppDestination({
    required this.path,
    required this.title,
    required this.icon,
    required this.label,
  });
}