import 'package:flutter/material.dart';
import 'features/calendar/calendar_screen.dart';
import 'features/insights/insights_screen.dart';
import 'features/log_mood/log_mood_screen.dart';
import 'features/settings/settings_screen.dart';

class AppShell extends StatefulWidget {
  const AppShell({super.key});

  @override
  State<AppShell> createState() => _AppShellState();
}

class _AppShellState extends State<AppShell> {
  int _index = 0;

  static const _screens = [
    LogMoodScreen(),
    CalendarScreen(),
    InsightsScreen(),
    SettingsScreen(),
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: IndexedStack(
        index: _index,
        children: _screens,
      ),
      bottomNavigationBar: NavigationBar(
        selectedIndex: _index,
        onDestinationSelected: (i) => setState(() => _index = i),
        destinations: const [
          NavigationDestination(
            icon: Icon(Icons.mood_outlined),
            selectedIcon: Icon(Icons.mood),
            label: 'Today',
          ),
          NavigationDestination(
            icon: Icon(Icons.calendar_month_outlined),
            selectedIcon: Icon(Icons.calendar_month),
            label: 'History',
          ),
          NavigationDestination(
            icon: Icon(Icons.auto_awesome_outlined),
            selectedIcon: Icon(Icons.auto_awesome),
            label: 'Insights',
          ),
          NavigationDestination(
            icon: Icon(Icons.settings_outlined),
            selectedIcon: Icon(Icons.settings),
            label: 'Settings',
          ),
        ],
      ),
    );
  }
}