import '../../core/network/i_api_client.dart';
import 'models/calendar_event.dart';

abstract class CalendarEventRepository {
  Future<List<CalendarEvent>> listByRange({
    required DateTime startAt,
    required DateTime endAt,
  });

  Future<CalendarEvent> getById(String id);
  Future<void> acceptSubscription(String itemId);
  Future<void> rejectSubscription(String itemId);
}

class CalendarEventRepositoryImpl implements CalendarEventRepository {
  final IApiClient _apiClient;
  static const _prefix = '/api/v1/schedule-items';

  CalendarEventRepositoryImpl(this._apiClient);

  @override
  Future<List<CalendarEvent>> listByRange({
    required DateTime startAt,
    required DateTime endAt,
  }) async {
    final start = Uri.encodeQueryComponent(startAt.toUtc().toIso8601String());
    final end = Uri.encodeQueryComponent(endAt.toUtc().toIso8601String());
    final response = await _apiClient.get<List<dynamic>>(
      '$_prefix?start_at=$start&end_at=$end',
    );
    final data = response.data;
    if (data == null) {
      throw StateError('Invalid listByRange response: empty payload');
    }
    return data
        .whereType<Map<String, dynamic>>()
        .map(CalendarEvent.fromJson)
        .toList(growable: false);
  }

  @override
  Future<CalendarEvent> getById(String id) async {
    final response = await _apiClient.get<Map<String, dynamic>>('$_prefix/$id');
    final event = response.data;
    if (event == null) {
      throw StateError('Invalid getById response: empty payload');
    }
    return CalendarEvent.fromJson(event);
  }

  @override
  Future<void> acceptSubscription(String itemId) {
    return _apiClient.post<void>('$_prefix/$itemId/accept');
  }

  @override
  Future<void> rejectSubscription(String itemId) {
    return _apiClient.post<void>('$_prefix/$itemId/reject');
  }
}