/// Repository pour la gestion des adhésions (demandes d'adhésion)
/// Interface avec l'API backend AdhesionResource
library adhesion_repository;

import 'package:dio/dio.dart';
import 'package:injectable/injectable.dart';
import 'package:unionflow_mobile_apps/core/network/api_client.dart';
import '../models/adhesion_model.dart';

abstract class AdhesionRepository {
  Future<List<AdhesionModel>> getAll({int page = 0, int size = 20});
  Future<AdhesionModel?> getById(String id);
  Future<AdhesionModel> create(AdhesionModel adhesion);
  Future<AdhesionModel> approuver(String id, {String? approuvePar});
  Future<AdhesionModel> rejeter(String id, String motifRejet);
  Future<AdhesionModel> enregistrerPaiement(
    String id, {
    required double montantPaye,
    String? methodePaiement,
    String? referencePaiement,
  });
  Future<List<AdhesionModel>> getByMembre(String membreId, {int page = 0, int size = 20});
  Future<List<AdhesionModel>> getByOrganisation(String organisationId, {int page = 0, int size = 20});
  Future<List<AdhesionModel>> getByStatut(String statut, {int page = 0, int size = 20});
  Future<List<AdhesionModel>> getEnAttente({int page = 0, int size = 20});
  Future<Map<String, dynamic>?> getStats();
}

@LazySingleton(as: AdhesionRepository)
class AdhesionRepositoryImpl implements AdhesionRepository {
  final ApiClient _apiClient;
  static const String _base = '/api/adhesions';

  AdhesionRepositoryImpl(this._apiClient);

  /// Parse une réponse API : liste directe ou objet paginé avec clé "content".
  List<AdhesionModel> _parseListResponse(dynamic data) {
    if (data is List) {
      return data
          .map((e) => AdhesionModel.fromJson(e as Map<String, dynamic>))
          .toList();
    }
    if (data is Map && data.containsKey('content')) {
      final content = data['content'] as List<dynamic>? ?? [];
      return content
          .map((e) => AdhesionModel.fromJson(e as Map<String, dynamic>))
          .toList();
    }
    return [];
  }

  @override
  Future<List<AdhesionModel>> getAll({int page = 0, int size = 20}) async {
    final response = await _apiClient.get(
      _base,
      queryParameters: {'page': page, 'size': size},
    );
    if (response.statusCode == 200) {
      return _parseListResponse(response.data);
    }
    throw Exception('Erreur ${response.statusCode}');
  }

  @override
  Future<AdhesionModel?> getById(String id) async {
    final response = await _apiClient.get('$_base/$id');
    if (response.statusCode == 200) {
      return AdhesionModel.fromJson(response.data as Map<String, dynamic>);
    }
    if (response.statusCode == 404) return null;
    throw Exception('Erreur ${response.statusCode}');
  }

  @override
  Future<AdhesionModel> create(AdhesionModel adhesion) async {
    final body = adhesion.toJson();
    // Backend attend membreId, organisationId, fraisAdhesion, codeDevise (optionnel)
    final response = await _apiClient.post(_base, data: body);
    if (response.statusCode == 201 || response.statusCode == 200) {
      return AdhesionModel.fromJson(response.data as Map<String, dynamic>);
    }
    throw Exception('Erreur création: ${response.statusCode}');
  }

  @override
  Future<AdhesionModel> approuver(String id, {String? approuvePar}) async {
    final response = await _apiClient.post(
      '$_base/$id/approuver',
      queryParameters: approuvePar != null ? {'approuvePar': approuvePar} : null,
    );
    if (response.statusCode == 200) {
      return AdhesionModel.fromJson(response.data as Map<String, dynamic>);
    }
    throw Exception('Erreur approbation: ${response.statusCode}');
  }

  @override
  Future<AdhesionModel> rejeter(String id, String motifRejet) async {
    final response = await _apiClient.post(
      '$_base/$id/rejeter',
      queryParameters: {'motifRejet': motifRejet},
    );
    if (response.statusCode == 200) {
      return AdhesionModel.fromJson(response.data as Map<String, dynamic>);
    }
    throw Exception('Erreur rejet: ${response.statusCode}');
  }

  @override
  Future<AdhesionModel> enregistrerPaiement(
    String id, {
    required double montantPaye,
    String? methodePaiement,
    String? referencePaiement,
  }) async {
    final q = <String, dynamic>{'montantPaye': montantPaye};
    if (methodePaiement != null) q['methodePaiement'] = methodePaiement;
    if (referencePaiement != null) q['referencePaiement'] = referencePaiement;
    final response = await _apiClient.post('$_base/$id/paiement', queryParameters: q);
    if (response.statusCode == 200) {
      return AdhesionModel.fromJson(response.data as Map<String, dynamic>);
    }
    throw Exception('Erreur paiement: ${response.statusCode}');
  }

  @override
  Future<List<AdhesionModel>> getByMembre(String membreId, {int page = 0, int size = 20}) async {
    final response = await _apiClient.get(
      '$_base/membre/$membreId',
      queryParameters: {'page': page, 'size': size},
    );
    if (response.statusCode == 200) {
      return _parseListResponse(response.data);
    }
    throw Exception('Erreur ${response.statusCode}');
  }

  @override
  Future<List<AdhesionModel>> getByOrganisation(String organisationId, {int page = 0, int size = 20}) async {
    final response = await _apiClient.get(
      '$_base/organisation/$organisationId',
      queryParameters: {'page': page, 'size': size},
    );
    if (response.statusCode == 200) {
      return _parseListResponse(response.data);
    }
    throw Exception('Erreur ${response.statusCode}');
  }

  @override
  Future<List<AdhesionModel>> getByStatut(String statut, {int page = 0, int size = 20}) async {
    final response = await _apiClient.get(
      '$_base/statut/$statut',
      queryParameters: {'page': page, 'size': size},
    );
    if (response.statusCode == 200) {
      return _parseListResponse(response.data);
    }
    throw Exception('Erreur ${response.statusCode}');
  }

  @override
  Future<List<AdhesionModel>> getEnAttente({int page = 0, int size = 20}) async {
    final response = await _apiClient.get(
      '$_base/en-attente',
      queryParameters: {'page': page, 'size': size},
    );
    if (response.statusCode == 200) {
      return _parseListResponse(response.data);
    }
    throw Exception('Erreur ${response.statusCode}');
  }

  @override
  Future<Map<String, dynamic>?> getStats() async {
    final response = await _apiClient.get('$_base/stats');
    if (response.statusCode == 200) {
      return response.data as Map<String, dynamic>;
    }
    return null;
  }
}