import "package:flutter/foundation.dart";

enum OrderType {
  dineIn,    // Table service (beacon detected)
  delivery,  // Delivery to customer
  takeaway,  // Pickup at counter
}

class AppState extends ChangeNotifier {
  int? _selectedBusinessId;
  String? _selectedBusinessName;
  int? _selectedServicePointId;
  String? _selectedServicePointName;

  int? _userId;

  OrderType? _orderType;

  int? _cartOrderId;
  String? _cartOrderUuid;
  int _cartItemCount = 0;

  int? _activeOrderId;
  int? _activeOrderStatusId;

  List<int> _groupOrderInvites = [];

  int? get selectedBusinessId => _selectedBusinessId;
  String? get selectedBusinessName => _selectedBusinessName;
  int? get selectedServicePointId => _selectedServicePointId;
  String? get selectedServicePointName => _selectedServicePointName;

  int? get userId => _userId;
  bool get isLoggedIn => _userId != null && _userId! > 0;

  OrderType? get orderType => _orderType;
  bool get isDelivery => _orderType == OrderType.delivery;
  bool get isTakeaway => _orderType == OrderType.takeaway;
  bool get isDineIn => _orderType == OrderType.dineIn;

  int? get cartOrderId => _cartOrderId;
  String? get cartOrderUuid => _cartOrderUuid;
  int get cartItemCount => _cartItemCount;

  int? get activeOrderId => _activeOrderId;
  int? get activeOrderStatusId => _activeOrderStatusId;
  bool get hasActiveOrder => _activeOrderId != null;

  List<int> get groupOrderInvites => _groupOrderInvites;
  bool get isGroupOrder => _groupOrderInvites.isNotEmpty;

  bool get hasLocationSelection =>
      _selectedBusinessId != null && _selectedServicePointId != null;

  void setBusiness(int businessId) {
    _selectedBusinessId = businessId;
    _selectedServicePointId = null;

    _cartOrderId = null;
    _cartOrderUuid = null;
    _cartItemCount = 0;

    notifyListeners();
  }

  void setServicePoint(int servicePointId) {
    _selectedServicePointId = servicePointId;

    _cartOrderId = null;
    _cartOrderUuid = null;
    _cartItemCount = 0;

    notifyListeners();
  }

  void setBusinessAndServicePoint(
    int businessId,
    int servicePointId, {
    String? businessName,
    String? servicePointName,
  }) {
    _selectedBusinessId = businessId;
    _selectedBusinessName = businessName;
    _selectedServicePointId = servicePointId;
    _selectedServicePointName = servicePointName;

    _cartOrderId = null;
    _cartOrderUuid = null;
    _cartItemCount = 0;

    notifyListeners();
  }

  void setUserId(int userId) {
    _userId = userId;
    notifyListeners();
  }

  void clearAuth() {
    _userId = null;
    notifyListeners();
  }

  void setOrderType(OrderType? type) {
    _orderType = type;
    notifyListeners();
  }

  void setCartOrder({required int orderId, required String orderUuid, int itemCount = 0}) {
    _cartOrderId = orderId;
    _cartOrderUuid = orderUuid;
    _cartItemCount = itemCount;
    notifyListeners();
  }

  void updateCartItemCount(int count) {
    _cartItemCount = count;
    notifyListeners();
  }

  void clearCart() {
    _cartOrderId = null;
    _cartOrderUuid = null;
    _cartItemCount = 0;
    notifyListeners();
  }

  void setActiveOrder({required int orderId, required int statusId}) {
    _activeOrderId = orderId;
    _activeOrderStatusId = statusId;
    notifyListeners();
  }

  void updateActiveOrderStatus(int statusId) {
    _activeOrderStatusId = statusId;
    notifyListeners();
  }

  void clearActiveOrder() {
    _activeOrderId = null;
    _activeOrderStatusId = null;
    notifyListeners();
  }

  void setGroupOrderInvites(List<int> userIds) {
    _groupOrderInvites = userIds;
    notifyListeners();
  }

  void clearGroupOrderInvites() {
    _groupOrderInvites = [];
    notifyListeners();
  }

  void clearAll() {
    _selectedBusinessId = null;
    _selectedServicePointId = null;
    _orderType = null;

    _cartOrderId = null;
    _cartOrderUuid = null;
    _cartItemCount = 0;

    _activeOrderId = null;
    _activeOrderStatusId = null;

    _groupOrderInvites = [];
  }
}