EM2_ERP/em2rp/lib/providers/container_provider.dart

import 'package:flutter/foundation.dart';
import 'package:em2rp/models/container_model.dart';
import 'package:em2rp/models/equipment_model.dart';
import 'package:em2rp/services/container_service.dart';
import 'package:em2rp/services/data_service.dart';
import 'package:em2rp/services/api_service.dart';

class ContainerProvider with ChangeNotifier {
  final ContainerService _containerService = ContainerService();
  final DataService _dataService = DataService(FirebaseFunctionsApiService());

  List<ContainerModel> _containers = [];
  ContainerType? _selectedType;
  EquipmentStatus? _selectedStatus;
  String _searchQuery = '';
  bool _isLoading = false;
  bool _isInitialized = false;

  List<ContainerModel> get containers => _containers;
  ContainerType? get selectedType => _selectedType;
  EquipmentStatus? get selectedStatus => _selectedStatus;
  String get searchQuery => _searchQuery;
  bool get isLoading => _isLoading;
  bool get isInitialized => _isInitialized;

  /// S'assure que les conteneurs sont chargés (charge si nécessaire)
  Future<void> ensureLoaded() async {
    if (_isInitialized || _isLoading) {
      print('[ContainerProvider] Containers already loaded or loading, skipping...');
      return;
    }
    print('[ContainerProvider] Containers not loaded, loading now...');
    await loadContainers();
  }

  /// Charger tous les containers via l'API
  Future<void> loadContainers() async {
    _isLoading = true;
    notifyListeners();

    try {
      // Pour l'instant, on écoute le stream et on garde la première valeur
      _containerService.getContainers(
        type: _selectedType,
        status: _selectedStatus,
        searchQuery: _searchQuery,
      ).listen((containers) {
        _containers = containers;
        _isLoading = false;
        _isInitialized = true;
        notifyListeners();
      });
    } catch (e) {
      print('Error loading containers: $e');
      _isLoading = false;
      notifyListeners();
    }
  }

  /// Stream des containers avec filtres appliqués
  Stream<List<ContainerModel>> get containersStream {
    return _containerService.getContainers(
      type: _selectedType,
      status: _selectedStatus,
      searchQuery: _searchQuery,
    );
  }

  /// Définir le type sélectionné
  void setSelectedType(ContainerType? type) {
    _selectedType = type;
    notifyListeners();
  }

  /// Définir le statut sélectionné
  void setSelectedStatus(EquipmentStatus? status) {
    _selectedStatus = status;
    notifyListeners();
  }

  /// Définir la requête de recherche
  void setSearchQuery(String query) {
    _searchQuery = query;
    notifyListeners();
  }

  /// Créer un nouveau container
  Future<void> createContainer(ContainerModel container) async {
    await _containerService.createContainer(container);
    notifyListeners();
  }

  /// Mettre à jour un container
  Future<void> updateContainer(String id, Map<String, dynamic> data) async {
    await _containerService.updateContainer(id, data);
    notifyListeners();
  }

  /// Supprimer un container
  Future<void> deleteContainer(String id) async {
    await _containerService.deleteContainer(id);
    notifyListeners();
  }

  /// Récupérer un container par ID
  Future<ContainerModel?> getContainerById(String id) async {
    return await _containerService.getContainerById(id);
  }

  /// Charge plusieurs conteneurs par leurs IDs (optimisé pour les détails d'événement)
  Future<List<ContainerModel>> getContainersByIds(List<String> containerIds) async {
    if (containerIds.isEmpty) return [];

    print('[ContainerProvider] Loading ${containerIds.length} containers by IDs...');

    try {
      // Vérifier d'abord le cache local
      final cachedContainers = <ContainerModel>[];
      final missingIds = <String>[];

      for (final id in containerIds) {
        final cached = _containers.firstWhere(
          (c) => c.id == id,
          orElse: () => ContainerModel(
            id: '',
            name: '',
            type: ContainerType.flightCase,
            status: EquipmentStatus.available,
            equipmentIds: [],
            createdAt: DateTime.now(),
            updatedAt: DateTime.now(),
          ),
        );

        if (cached.id.isNotEmpty) {
          cachedContainers.add(cached);
        } else {
          missingIds.add(id);
        }
      }

      print('[ContainerProvider] Found ${cachedContainers.length} in cache, ${missingIds.length} missing');

      // Si tous sont en cache, retourner directement
      if (missingIds.isEmpty) {
        return cachedContainers;
      }

      // Charger les manquants depuis l'API
      final containersData = await _dataService.getContainersByIds(missingIds);

      final loadedContainers = containersData.map((data) {
        return ContainerModel.fromMap(data, data['id'] as String);
      }).toList();

      // Ajouter au cache
      for (final container in loadedContainers) {
        if (!_containers.any((c) => c.id == container.id)) {
          _containers.add(container);
        }
      }

      print('[ContainerProvider] Loaded ${loadedContainers.length} containers from API');

      // Retourner tous les conteneurs (cache + chargés)
      return [...cachedContainers, ...loadedContainers];
    } catch (e) {
      print('[ContainerProvider] Error loading containers by IDs: $e');
      rethrow;
    }
  }

  /// Ajouter un équipement à un container
  Future<Map<String, dynamic>> addEquipmentToContainer({
    required String containerId,
    required String equipmentId,
    String? userId,
  }) async {
    final result = await _containerService.addEquipmentToContainer(
      containerId: containerId,
      equipmentId: equipmentId,
      userId: userId,
    );
    notifyListeners();
    return result;
  }

  /// Retirer un équipement d'un container
  Future<void> removeEquipmentFromContainer({
    required String containerId,
    required String equipmentId,
    String? userId,
  }) async {
    await _containerService.removeEquipmentFromContainer(
      containerId: containerId,
      equipmentId: equipmentId,
      userId: userId,
    );
    notifyListeners();
  }

  /// Vérifier la disponibilité d'un container
  Future<Map<String, dynamic>> checkContainerAvailability({
    required String containerId,
    required DateTime startDate,
    required DateTime endDate,
    String? excludeEventId,
  }) async {
    return await _containerService.checkContainerAvailability(
      containerId: containerId,
      startDate: startDate,
      endDate: endDate,
      excludeEventId: excludeEventId,
    );
  }

  /// Récupérer les équipements d'un container
  Future<List<EquipmentModel>> getContainerEquipment(String containerId) async {
    return await _containerService.getContainerEquipment(containerId);
  }

  /// Trouver tous les containers contenant un équipement
  Future<List<ContainerModel>> findContainersWithEquipment(String equipmentId) async {
    return await _containerService.findContainersWithEquipment(equipmentId);
  }

  /// Vérifier si un ID existe
  Future<bool> checkContainerIdExists(String id) async {
    return await _containerService.checkContainerIdExists(id);
  }

  /// Générer un ID unique pour un container
  /// Format: BOX_{TYPE}_{NAME}_{NUMBER}
  static String generateContainerId({
    required ContainerType type,
    required String name,
    int? number,
  }) {
    // Obtenir le type en majuscules
    final typeStr = containerTypeToString(type);

    // Nettoyer le nom (enlever espaces, caractères spéciaux)
    final cleanName = name
        .replaceAll(' ', '_')
        .replaceAll(RegExp(r'[^a-zA-Z0-9_-]'), '')
        .toUpperCase();

    if (number != null) {
      return 'BOX_${typeStr}_${cleanName}_#$number';
    }

    return 'BOX_${typeStr}_$cleanName';
  }

  /// Assurer l'unicité d'un ID de container
  static Future<String> ensureUniqueContainerId(
    String baseId,
    ContainerService service,
  ) async {
    String uniqueId = baseId;
    int counter = 1;

    while (await service.checkContainerIdExists(uniqueId)) {
      uniqueId = '${baseId}_$counter';
      counter++;
    }

    return uniqueId;
  }
}