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

import 'package:household_keeper/features/home/presentation/calendar_day_list.dart';
import 'package:household_keeper/features/home/presentation/calendar_providers.dart';
import 'package:household_keeper/features/home/presentation/calendar_strip.dart';
import 'package:household_keeper/l10n/app_localizations.dart';

/// The app's primary screen: a horizontal calendar strip at the top with a
/// day task list below.
///
/// Replaces the former stacked overdue/today/tomorrow daily plan layout.
/// Users navigate by tapping day cards to see that day's tasks.
class HomeScreen extends ConsumerStatefulWidget {
  const HomeScreen({super.key});

  @override
  ConsumerState<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends ConsumerState<HomeScreen> {
  late final CalendarStripController _stripController =
      CalendarStripController();

  /// Whether to show the floating "Heute" button.
  /// True when the user has scrolled away from today's card.
  bool _showTodayButton = false;

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context);

    return Stack(
      children: [
        Column(
          children: [
            CalendarStrip(
              controller: _stripController,
              onTodayVisibilityChanged: (visible) {
                setState(() => _showTodayButton = !visible);
              },
            ),
            const Expanded(child: CalendarDayList()),
          ],
        ),
        if (_showTodayButton)
          Positioned(
            bottom: 16,
            left: 0,
            right: 0,
            child: Center(
              child: FloatingActionButton.extended(
                onPressed: () {
                  final now = DateTime.now();
                  final today = DateTime(now.year, now.month, now.day);
                  ref
                      .read(selectedDateProvider.notifier)
                      .selectDate(today);
                  _stripController.scrollToToday();
                },
                icon: const Icon(Icons.today),
                label: Text(l10n.calendarTodayButton),
              ),
            ),
          ),
      ],
    );
  }
}