import 'package:flutter/foundation.dart';
import 'package:mileograph_flutter/objects/objects.dart';
import 'package:mileograph_flutter/services/apiService.dart'; // assumes you've moved HomepageStats + submodels to a separate file

class DataService extends ChangeNotifier {
  final ApiService api;

  DataService({required this.api});

  HomepageStats? _homepageStats;
  HomepageStats? get homepageStats => _homepageStats;

  List<Leg> _legs = [];
  List<Leg> get legs => _legs;

  bool _isHomepageLoading = false;
  bool get isHomepageLoading => _isHomepageLoading;

  Future<void> fetchHomepageStats() async {
    _isHomepageLoading = true;
    notifyListeners();

    try {
      final json = await api.get('/stats/homepage');
      _homepageStats = HomepageStats.fromJson(json);
    } catch (e) {
      debugPrint('Failed to fetch homepage stats: $e');
      _homepageStats = null;
    } finally {
      _isHomepageLoading = false;
      notifyListeners();
    }
  }
  
  Future<void> fetchLegs({
  int offset = 0,
  int limit = 100,
  String sortBy = 'date',
  int sortDirection = 0,
}) async {
  final query = '?sort_direction=$sortDirection&sort_by=$sortBy&offset=$offset&limit=$limit';
  final json = await api.get('/user/legs$query');

  if (json is List) {
    _legs = json.map((e) => Leg.fromJson(e)).toList();
    notifyListeners();
  } else {
    throw Exception('Unexpected legs response: $json');
  }
}

  void clear() {
    _homepageStats = null;
    notifyListeners();
  }

  double getMileageForCurrentYear() {
    final currentYear = DateTime.now().year;
    return getMileageForYear(currentYear) ?? 0;
  }

  double? getMileageForYear(int year) {
    return _homepageStats?.yearlyMileage
            .firstWhere(
              (entry) => entry.year == year,
              orElse: () => YearlyMileage(year: null, mileage: 0),
            )
            .mileage ??
        0;
  }
}