using System.Diagnostics.Contracts;
using NHibernate;

namespace MyDemon.Core.Units.User
{
    using Shared;
    using Entities;

    public class AddUser : ICommand<User>
    {
        public User User { get; private set; }

        public AddUser(string userName, string password)
        {
            Contract.Requires(!string.IsNullOrWhiteSpace(userName));
            Contract.Requires(!string.IsNullOrWhiteSpace(password));

            byte[] salt = Salt.GenerateSalt();
            byte[] passwordToUse = Salt.ComputeHash(password, salt);

            User = new User()
            {
                    UserName = userName,
                    Password = passwordToUse,
                    Salt = salt
            };
        }

        #region Implementation of IUnitOfWork<out User>

        public User Query(ISession session)
        {
            session.Save(User);
            return User;
        }

        #endregion
    }
}