import 'package:dio/dio.dart';
import 'package:injectable/injectable.dart';
import '../../../../core/config/environment.dart';
import '../../../../core/utils/logger.dart';
import '../../../../features/authentication/data/datasources/keycloak_auth_service.dart';
import '../models/formule_model.dart';
import '../models/souscription_status_model.dart';

@lazySingleton
class SouscriptionDatasource {
  final KeycloakAuthService _authService;
  final Dio _dio = Dio();

  SouscriptionDatasource(this._authService);

  Future<Options> _authOptions() async {
    final token = await _authService.getValidToken();
    return Options(
      headers: {'Authorization': 'Bearer $token'},
      validateStatus: (s) => s != null && s < 500,
    );
  }

  String get _base => AppConfig.apiBaseUrl;

  /// Liste toutes les formules disponibles (public)
  Future<List<FormuleModel>> getFormules() async {
    try {
      final opts = await _authOptions();
      final response = await _dio.get('$_base/api/souscriptions/formules', options: opts);
      if (response.statusCode == 200 && response.data is List) {
        return (response.data as List)
            .map((e) => FormuleModel.fromJson(e as Map))
            .toList();
      }
    } catch (e) {
      AppLogger.error('SouscriptionDatasource.getFormules: $e');
    }
    return [];
  }

  /// Récupère la souscription courante de l'OrgAdmin connecté
  Future<SouscriptionStatusModel?> getMaSouscription() async {
    try {
      final opts = await _authOptions();
      final response = await _dio.get('$_base/api/souscriptions/ma-souscription', options: opts);
      if (response.statusCode == 200 && response.data is Map) {
        return SouscriptionStatusModel.fromJson(response.data as Map);
      }
    } catch (e) {
      AppLogger.error('SouscriptionDatasource.getMaSouscription: $e');
    }
    return null;
  }

  /// Crée une demande de souscription
  Future<SouscriptionStatusModel?> creerDemande({
    required String typeFormule,
    required String plageMembres,
    required String typePeriode,
    required String typeOrganisation,
    required String organisationId,
  }) async {
    try {
      final opts = await _authOptions();
      final response = await _dio.post(
        '$_base/api/souscriptions/demande',
        data: {
          'typeFormule': typeFormule,
          'plageMembres': plageMembres,
          'typePeriode': typePeriode,
          'typeOrganisation': typeOrganisation,
          'organisationId': organisationId,
        },
        options: opts,
      );
      if ((response.statusCode == 200 || response.statusCode == 201) && response.data is Map) {
        return SouscriptionStatusModel.fromJson(response.data as Map);
      }
      AppLogger.warning('SouscriptionDatasource.creerDemande: HTTP ${response.statusCode}');
    } catch (e) {
      AppLogger.error('SouscriptionDatasource.creerDemande: $e');
    }
    return null;
  }

  /// Initie le paiement Wave pour une souscription existante
  Future<SouscriptionStatusModel?> initierPaiement(String souscriptionId) async {
    try {
      final opts = await _authOptions();
      final response = await _dio.post(
        '$_base/api/souscriptions/$souscriptionId/initier-paiement',
        options: opts,
      );
      if (response.statusCode == 200 && response.data is Map) {
        return SouscriptionStatusModel.fromJson(response.data as Map);
      }
    } catch (e) {
      AppLogger.error('SouscriptionDatasource.initierPaiement: $e');
    }
    return null;
  }

  /// Confirme le paiement Wave après retour du deep link
  Future<bool> confirmerPaiement(String souscriptionId) async {
    try {
      final opts = await _authOptions();
      final response = await _dio.post(
        '$_base/api/souscriptions/$souscriptionId/confirmer-paiement',
        options: opts,
      );
      return response.statusCode == 200;
    } catch (e) {
      AppLogger.error('SouscriptionDatasource.confirmerPaiement: $e');
    }
    return false;
  }
}