part of 'data_service.dart';

extension DataServiceTrips on DataService {
  Future<void> fetchTripDetails() async {
    _isTripDetailsLoading = true;
    try {
      final json = await api.get('/trips/info');
      final tripDetails = _parseTripInfoList(json);
      _tripDetails = [...tripDetails]..sort(TripDetail.compareByDateDesc);
      _tripList = tripDetails
          .map(
            (detail) => TripSummary(
              tripId: detail.id,
              tripName: detail.name,
              tripMileage: detail.mileage,
              legCount: detail.legCount,
              locoStats: detail.locoStats,
              startDate: detail.startDate,
              endDate: detail.endDate,
            ),
          )
          .toList()
        ..sort(TripSummary.compareByDateDesc);
    } catch (e) {
      debugPrint('Failed to fetch trip_map: $e');
      _tripDetails = [];
      _tripList = [];
    } finally {
      _isTripDetailsLoading = false;
      _notifyAsync();
    }
  }

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

  Future<void> fetchTrips() async {
    try {
      final json = await api.get('/trips/info');
      final raw = _extractTrips(json);
      if (raw != null) {
        final tripMap = raw
            .whereType<Map<String, dynamic>>()
            .map((e) => TripSummary.fromJson(e))
            .toList();

        _tripList = [...tripMap]..sort(TripSummary.compareByDateDesc);
      } 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(TripSummary.compareByDateDesc);
      } 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(TripSummary.compareByDateDesc);
    _notifyAsync();
  }

  Iterable<dynamic>? _extractTrips(dynamic json) {
    if (json is List) return json;
    if (json is Map) {
      for (final key in ['trips', 'trip_data', 'data', 'trip_info']) {
        final value = json[key];
        if (value is List) return value;
      }
    }
    return null;
  }

  List<TripDetail> _parseTripInfoList(dynamic json) {
    final raw = _extractTrips(json);
    if (raw == null) return const [];
    return raw
        .whereType<Map<String, dynamic>>()
        .map((e) => TripDetail.fromJson(e))
        .toList();
  }
}