kettlebell-tracker/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:kettlebell_tracker/providers/settings_provider.dart';
import 'package:kettlebell_tracker/screens/home_screen.dart';
import 'package:kettlebell_tracker/screens/settings_screen.dart';
import 'package:kettlebell_tracker/screens/training_screen.dart';
import 'package:kettlebell_tracker/screens/history_screen.dart';
import 'package:kettlebell_tracker/theme/app_theme.dart';
import 'package:sqflite_common_ffi/sqflite_ffi.dart';
import 'dart:io';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  if (Platform.isWindows || Platform.isLinux || Platform.isMacOS) {
    sqfliteFfiInit();
    databaseFactory = databaseFactoryFfi;
  }

  runApp(
    const ProviderScope(child: MyApp()),
  );
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Giant Programm Tracker',
      theme: AppTheme.darkTheme,
      home: const MainScreen(),
      debugShowCheckedModeBanner: false,
    );
  }
}

class MainScreen extends ConsumerStatefulWidget {
  const MainScreen({super.key});

  @override
  ConsumerState<MainScreen> createState() => _MainScreenState();
}

class _MainScreenState extends ConsumerState<MainScreen> {
  int _selectedIndex = 0;

  static const List<Widget> _widgetOptions = <Widget>[
    HomeScreen(),
    SettingsScreen(),
    TrainingScreen(),
    HistoryScreen(),
  ];

  void _onItemTapped(int index) {
    setState(() {
      _selectedIndex = index;
    });
  }

  @override
  void initState() {
    super.initState();
    Future.microtask(() {
      ref.read(settingsProvider.notifier).loadSettings();
    });
  }

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    return Scaffold(
      body: Center(child: _widgetOptions.elementAt(_selectedIndex)),
      bottomNavigationBar: BottomNavigationBar(
        items: const <BottomNavigationBarItem>[
          BottomNavigationBarItem(icon: Icon(Icons.home), label: 'Home'),
          BottomNavigationBarItem(
            icon: Icon(Icons.settings),
            label: 'Einstellungen',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.sports_gymnastics),
            label: 'Training',
          ),
          BottomNavigationBarItem(icon: Icon(Icons.history), label: 'Historie'),
        ],
        currentIndex: _selectedIndex,
        onTap: _onItemTapped,
        type: BottomNavigationBarType.fixed, // Important for more than 3 items
        backgroundColor: theme.colorScheme.surface,
        selectedItemColor: theme.colorScheme.primary,
        unselectedItemColor: AppTheme.oneDarkTextWeak,
      ),
    );
  }
}