import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../shared/models/home_summary.dart';
import 'home_service.dart';

// ── Selected date (persists while app is open) ────────────────

/// The date currently viewed on the home screen.
/// Defaults to today; can be changed via the date selector.
final selectedDateProvider = StateProvider<DateTime>((ref) => DateTime.now());

/// Formats a [DateTime] to the 'YYYY-MM-DD' string expected by the diary API.
String formatDateForDiary(DateTime date) =>
    '${date.year}-${date.month.toString().padLeft(2, '0')}-'
    '${date.day.toString().padLeft(2, '0')}';

// ── Home summary ──────────────────────────────────────────────

class HomeNotifier extends StateNotifier<AsyncValue<HomeSummary>> {
  final HomeService _service;

  HomeNotifier(this._service) : super(const AsyncValue.loading()) {
    load();
  }

  Future<void> load() async {
    state = const AsyncValue.loading();
    state = await AsyncValue.guard(() => _service.getSummary());
  }
}

final homeProvider =
    StateNotifierProvider<HomeNotifier, AsyncValue<HomeSummary>>(
  (ref) => HomeNotifier(ref.read(homeServiceProvider)),
);