// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
 
using System.Collections.ObjectModel;
using System.Runtime;
 
namespace System.IdentityModel.Tokens
{
    public class UserNameSecurityToken : SecurityToken
    {
        private string _id;
        private string _userName;
        private DateTime _effectiveTime;
 
        public UserNameSecurityToken(string userName, string password)
            : this(userName, password, SecurityUniqueId.Create().Value)
        {
        }
 
        public UserNameSecurityToken(string userName, string password, string id)
        {
            if (userName == null)
            {
                throw Fx.Exception.ArgumentNull(nameof(userName));
            }
 
            if (userName == string.Empty)
            {
                throw Fx.Exception.Argument(nameof(userName), SRP.UserNameCannotBeEmpty);
            }
 
            _userName = userName;
            Password = password;
            _id = id;
            _effectiveTime = DateTime.UtcNow;
        }
 
        public override string Id
        {
            get { return _id; }
        }
 
        public override ReadOnlyCollection<SecurityKey> SecurityKeys
        {
            get { return EmptyReadOnlyCollection<SecurityKey>.Instance; }
        }
 
        public override DateTime ValidFrom
        {
            get { return _effectiveTime; }
        }
 
        public override DateTime ValidTo
        {
            // Never expire
            get { return SecurityUtils.MaxUtcDateTime; }
        }
 
        public string UserName
        {
            get { return _userName; }
        }
 
        public string Password { get; }
    }
}