part of 'data_service.dart';

extension DataServiceTrips on DataService {
  Future<void> fetchTripDetails() async {
    _isTripDetailsLoading = true;
    try {
      final json = await api.get('/trips/legs-and-stats');
      if (json is List) {
        final tripMap = json.map((e) => TripDetail.fromJson(e)).toList();
        _tripDetails = [...tripMap]..sort((a, b) => b.id.compareTo(a.id));
      } else {
        _tripDetails = [];
      }
    } catch (e) {
      debugPrint('Failed to fetch trip_map: $e');
      _tripDetails = [];
    } finally {
      _isTripDetailsLoading = false;
      _notifyAsync();
    }
  }

  Future<List<TripLocoStat>> fetchTripLocoStats(int tripId) async {
    try {
      final json = await api.get('/trips/stats/$tripId');
      return _parseTripLocoStats(json);
    } catch (e) {
      debugPrint('Failed to fetch trip loco stats: $e');
      return [];
    }
  }

  List<TripLocoStat> _parseTripLocoStats(dynamic json) {
    List<dynamic>? list;
    if (json is List) {
      list = json.expand((e) => e is List ? e : [e]).toList();
    } else if (json is Map) {
      for (final key in ['locos', 'stats', 'data', 'trip_locos']) {
        final candidate = json[key];
        if (candidate is List) {
          list = candidate.expand((e) => e is List ? e : [e]).toList();
          break;
        }
      }
    }
    if (list == null) return [];
    return list
        .whereType<Map<String, dynamic>>()
        .map((e) => TripLocoStat.fromJson(e))
        .toList();
  }

  Future<void> fetchTrips() async {
    try {
      final json = await api.get('/trips/mileage');
      Iterable<dynamic>? raw;
      if (json is List) {
        raw = json;
      } else if (json is Map) {
        for (final key in ['trips', 'trip_data', 'data']) {
          final value = json[key];
          if (value is List) {
            raw = value;
            break;
          }
        }
      }
      if (raw != null) {
        final tripMap = raw
            .whereType<Map<String, dynamic>>()
            .map((e) => TripSummary.fromJson(e))
            .toList();

        _tripList = [...tripMap]..sort((a, b) => b.tripId.compareTo(a.tripId));
      } else {
        debugPrint('Unexpected trip list response: $json');
        _tripList = [];
      }
    } catch (e) {
      debugPrint('Failed to fetch trip list: $e');
      _tripList = [];
    } finally {
      _notifyAsync();
    }
  }

  Future<void> fetchTripOptions() async {
    try {
      final json = await api.get('/trips');
      Iterable<dynamic>? raw;
      if (json is List) {
        raw = json;
      } else if (json is Map) {
        for (final key in ['trips', 'trip_data', 'data']) {
          final value = json[key];
          if (value is List) {
            raw = value;
            break;
          }
        }
      }
      if (raw != null) {
        final tripMap = raw
            .whereType<Map<String, dynamic>>()
            .map((e) => TripSummary.fromJson(e))
            .toList();

        _tripList = [...tripMap]..sort((a, b) => b.tripId.compareTo(a.tripId));
      } else {
        debugPrint('Unexpected trip list response: $json');
        _tripList = [];
      }
    } catch (e) {
      debugPrint('Failed to fetch trip list: $e');
      _tripList = [];
    } finally {
      _notifyAsync();
    }
  }

  void upsertTripSummary(TripSummary trip) {
    final existingIndex =
        _tripList.indexWhere((element) => element.tripId == trip.tripId);
    if (existingIndex >= 0) {
      _tripList[existingIndex] = trip;
    } else {
      _tripList = [trip, ..._tripList];
    }
    _tripList.sort((a, b) => b.tripId.compareTo(a.tripId));
    _notifyAsync();
  }
}