import 'package:flutter/foundation.dart';
import 'package:em2rp/models/equipment_model.dart';
import 'package:em2rp/services/equipment_service.dart';

class EquipmentProvider extends ChangeNotifier {
  final EquipmentService _service = EquipmentService();

  List<EquipmentModel> _equipment = [];
  List<String> _models = [];
  List<String> _brands = [];

  EquipmentCategory? _selectedCategory;
  EquipmentStatus? _selectedStatus;
  String? _selectedModel;
  String _searchQuery = '';

  // Getters
  List<EquipmentModel> get equipment => _equipment;
  List<String> get models => _models;
  List<String> get brands => _brands;
  EquipmentCategory? get selectedCategory => _selectedCategory;
  EquipmentStatus? get selectedStatus => _selectedStatus;
  String? get selectedModel => _selectedModel;
  String get searchQuery => _searchQuery;

  /// Stream des équipements avec filtres appliqués
  Stream<List<EquipmentModel>> get equipmentStream {
    return _service.getEquipment(
      category: _selectedCategory,
      status: _selectedStatus,
      model: _selectedModel,
      searchQuery: _searchQuery,
    );
  }

  /// Charger tous les modèles uniques
  Future<void> loadModels() async {
    try {
      _models = await _service.getAllModels();
      notifyListeners();
    } catch (e) {
      print('Error loading models: $e');
      rethrow;
    }
  }

  /// Charger toutes les marques uniques
  Future<void> loadBrands() async {
    try {
      _brands = await _service.getAllBrands();
      notifyListeners();
    } catch (e) {
      print('Error loading brands: $e');
      rethrow;
    }
  }

  /// Charger les modèles filtrés par marque
  Future<List<String>> loadModelsByBrand(String brand) async {
    try {
      return await _service.getModelsByBrand(brand);
    } catch (e) {
      print('Error loading models by brand: $e');
      rethrow;
    }
  }


  /// Ajouter un équipement
  Future<void> addEquipment(EquipmentModel equipment) async {
    try {
      await _service.createEquipment(equipment);

      // Recharger les modèles si un nouveau modèle a été ajouté
      if (equipment.model != null && !_models.contains(equipment.model)) {
        await loadModels();
      }
    } catch (e) {
      print('Error adding equipment: $e');
      rethrow;
    }
  }

  /// Mettre à jour un équipement
  Future<void> updateEquipment(String id, Map<String, dynamic> data) async {
    try {
      await _service.updateEquipment(id, data);

      // Recharger les modèles si le modèle a changé
      if (data.containsKey('model')) {
        await loadModels();
      }
    } catch (e) {
      print('Error updating equipment: $e');
      rethrow;
    }
  }

  /// Supprimer un équipement
  Future<void> deleteEquipment(String id) async {
    try {
      await _service.deleteEquipment(id);
    } catch (e) {
      print('Error deleting equipment: $e');
      rethrow;
    }
  }

  /// Récupérer un équipement par ID
  Future<EquipmentModel?> getEquipmentById(String id) async {
    try {
      return await _service.getEquipmentById(id);
    } catch (e) {
      print('Error getting equipment: $e');
      rethrow;
    }
  }

  /// Trouver des alternatives disponibles
  Future<List<EquipmentModel>> findAlternatives(
    String model,
    DateTime startDate,
    DateTime endDate,
  ) async {
    try {
      return await _service.findAlternatives(model, startDate, endDate);
    } catch (e) {
      print('Error finding alternatives: $e');
      rethrow;
    }
  }

  /// Vérifier la disponibilité d'un équipement
  Future<List<String>> checkAvailability(
    String equipmentId,
    DateTime startDate,
    DateTime endDate,
  ) async {
    try {
      return await _service.checkAvailability(equipmentId, startDate, endDate);
    } catch (e) {
      print('Error checking availability: $e');
      rethrow;
    }
  }

  /// Mettre à jour le stock d'un consommable
  Future<void> updateStock(String id, int quantityChange) async {
    try {
      await _service.updateStock(id, quantityChange);
    } catch (e) {
      print('Error updating stock: $e');
      rethrow;
    }
  }

  /// Vérifier les stocks critiques
  Future<void> checkCriticalStock() async {
    try {
      await _service.checkCriticalStock();
    } catch (e) {
      print('Error checking critical stock: $e');
      rethrow;
    }
  }

  /// Générer les données du QR code
  String generateQRCodeData(String equipmentId) {
    return _service.generateQRCodeData(equipmentId);
  }

  /// Vérifier si un ID est unique
  Future<bool> isIdUnique(String id) async {
    try {
      return await _service.isIdUnique(id);
    } catch (e) {
      print('Error checking ID uniqueness: $e');
      rethrow;
    }
  }

  // === FILTRES ===

  /// Définir la catégorie sélectionnée
  void setSelectedCategory(EquipmentCategory? category) {
    _selectedCategory = category;
    notifyListeners();
  }

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

  /// Définir le modèle sélectionné
  void setSelectedModel(String? model) {
    _selectedModel = model;
    notifyListeners();
  }

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

  /// Réinitialiser tous les filtres
  void resetFilters() {
    _selectedCategory = null;
    _selectedStatus = null;
    _selectedModel = null;
    _searchQuery = '';
    notifyListeners();
  }
}