app-boilerplate/lib/ui/settings/settings_screen.dart

import 'package:flutter/material.dart';
import '../../core/service_locator.dart';
import '../../data/firebase/firebase_service.dart';
import '../../data/nostr/nostr_service.dart';
import '../../data/sync/sync_engine.dart';
import '../relay_management/relay_management_screen.dart';
import '../relay_management/relay_management_controller.dart';

/// Settings screen (placeholder).
class SettingsScreen extends StatelessWidget {
  const SettingsScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Settings'),
      ),
      body: ListView(
        children: [
          Builder(
            builder: (context) {
              final firebaseService = ServiceLocator.instance.firebaseService;
              if (firebaseService != null) {
                return SwitchListTile(
                  title: const Text('Firebase Enabled'),
                  subtitle: Text(
                    firebaseService.isEnabled
                        ? 'Firebase services are active'
                        : 'Firebase services are disabled',
                  ),
                  value: firebaseService.isEnabled,
                  onChanged: null, // Read-only for now
                );
              }
              return const SizedBox.shrink();
            },
          ),
          Builder(
            builder: (context) {
              final nostrService = ServiceLocator.instance.nostrService;
              final syncEngine = ServiceLocator.instance.syncEngine;
              if (nostrService != null && syncEngine != null) {
                return Column(
                  children: [
                    const Divider(),
                    ListTile(
                      leading: const Icon(Icons.cloud),
                      title: const Text('Relay Management'),
                      subtitle: const Text('Manage Nostr relays'),
                      trailing: const Icon(Icons.chevron_right),
                      onTap: () {
                        Navigator.of(context).push(
                          MaterialPageRoute(
                            builder: (_) => RelayManagementScreen(
                              controller: RelayManagementController(
                                nostrService: nostrService,
                                syncEngine: syncEngine,
                              ),
                            ),
                          ),
                        );
                      },
                    ),
                  ],
                );
              }
              return const SizedBox.shrink();
            },
          ),
          const Divider(),
          const ListTile(
            leading: Icon(Icons.info_outline),
            title: Text('App Version'),
            subtitle: Text('1.0.0'),
          ),
          const Divider(),
          const ListTile(
            leading: Icon(Icons.help_outline),
            title: Text('About'),
            subtitle: Text('Flutter Modular App Boilerplate'),
          ),
        ],
      ),
    );
  }
}