Okay, let's create the main `ManagementWindow` with the two tabs: "Traveler" and "Owner/Manager". We'll also add placeholder data structures and update the login/registration flow. using System; using System.Collections.Generic; namespace BookingApp.Models { // Represents different types of accommodation public enum AccommodationType { Apartment, House, Room, Hotel, Hostel } // Represents an accommodation listing public class Accommodation { public int Id { get; set; } public string Name { get; set; } = string.Empty; public string Area { get; set; } = string.Empty; public AccommodationType Type { get; set; } public int Capacity { get; set; } public int Rooms { get; set; } public List Amenities { get; set; } = new List(); public Dictionary DistanceToLandmarks { get; set; } = new Dictionary(); // Landmark name -> Travel time public int OwnerId { get; set; } // Link to the owner user // Constructor for easier initialization public Accommodation(int id, string name, string area, AccommodationType type, int capacity, int rooms, int ownerId) { Id = id; Name = name; Area = area; Type = type; Capacity = capacity; Rooms = rooms; OwnerId = ownerId; } // Parameterless constructor for DataGrid or other frameworks if needed public Accommodation() { } public override string ToString() { return $"{Name} ({Type}) - {Area}"; } } } using System; namespace BookingApp.Models { public enum UserRole { Traveler, Owner, Manager // Potentially distinct from Owner } public class User { public int Id { get; set; } public string Username { get; set; } = string.Empty; // In a real app, store a hashed password, not the plain text public string PasswordHash { get; set; } = string.Empty; public UserRole Role { get; set; } public string? EmployeeId { get; set; } // Nullable for non-employees // Add other relevant user details if needed (Email, Name, etc.) } }