using System;
using System.Collections.Generic;
using System.Text;
using System.Net;

namespace Intel.Manageability
{
    /// <summary>
    /// A class that represents the connection information.
    /// This covers basic TCP connectivity: hostname, port, TLS or not, via web proxy or not,
    /// or via SOCKS proxy or not.
    /// </summary>
    public class ConnectionInfo : ICloneable
    {
        #region ICloneable interface implementation
        
        /// <summary>
        /// Clone - return a new copy of this object.
        /// </summary>
        /// <returns></returns>
        public object Clone()
        {
            SocksProxy newSocksProxy = null;
            if (this.SoxProxy != null)
            {
                newSocksProxy = new SocksProxy();
                newSocksProxy.Host = this.SoxProxy.Host;
                newSocksProxy.Password = this.SoxProxy.Password;
                newSocksProxy.Port = this.SoxProxy.Port;
                newSocksProxy.UserName = this.SoxProxy.UserName;
            }

            string host = (string)this.Host.Clone();
            string username = (string)this.UserName.Clone();
            string password = (string)this.Password.Clone();
            string certificate = (string)this.Certificate.Clone();

            ConnectionInfo newObj = new ConnectionInfo(host, username, password,
                this.Secure, certificate, this.Auth, this.Proxy, newSocksProxy);

            return newObj;
        }
        #endregion

        /// <summary>
        /// Enum that represents the authentication type
        /// </summary>
        public enum AuthMethod
        {
            /// <summary>
            /// HTTP Digest access authentication
            /// </summary>
            Digest,
            /// <summary>
            /// HTTP Kerberos access authentication
            /// </summary>
            Kerberos
        }

        /// <summary>
        /// Class which represents a SOCKS proxy.
        /// XXX: This might should be replaced with an IWebProxy.
        /// </summary>
        public class SocksProxy
        {
            /// <summary>
            /// Hostname / IP of the machine to connect.
            /// </summary>
            public string Host { get; set; }

            /// <summary>
            /// Port of the machine to connect.
            /// </summary>
            public int Port { get; set; }

            /// <summary>
            /// User name of the machine to connect.
            /// </summary>
            public string UserName { get; set; }

            /// <summary>
            /// Password of the machine to connect.
            /// </summary>
            public string Password { get; set; }
        }

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="host">Hostname / IP of the machine to connect.</param>
        /// <param name="userName">User name of the machine to connect.</param>
        /// <param name="password">Password of the machine to connect.</param>
        /// <param name="secure">Indicates whether or not to use TLS in the connection.</param>
        /// <param name="certificate">Certificate name (as it appears in the subject field of the certificate).</param>
        /// <param name="auth">Enum that represents the authentication type.</param>
        /// <param name="proxy">Indicates whether or not to use a proxy in the connection.</param>
        /// <param name="socksProxy">Indicate whether to use a SOCKS proxy.</param>
        public ConnectionInfo(string host, string userName,
            string password, bool secure, string certificate, AuthMethod auth, IWebProxy proxy,
            SocksProxy socksProxy)
        {
            Host = host;
            UserName = userName;
            if (UserName == null)
            {
                UserName = "";
            }
            Password = password;
            if (Password == null)
            {
                Password = "";
            }
            Secure = secure;
            Certificate = certificate;
            if (Certificate == null)
            {
                Certificate = "";
            }
            Auth = auth;
            Proxy = proxy;
            SoxProxy = socksProxy;
        }

        /// <summary>
        /// Hostname / IP of the machine to connect.
        /// </summary>
        public string Host { set; get; }

        /// <summary>
        /// User name of the machine to connect.
        /// </summary>
        public string UserName { set; get; }

        /// <summary>
        /// Password of the machine to connect.
        /// </summary>
        public string Password { set; get; }

        /// <summary>
        /// Full URI (e.g. http://hostname:16992/wsman)
        /// </summary>
        public Uri HostUri
        {
            get
            {
                UriBuilder newUri = new UriBuilder((Secure ? "https" : "http"), Host, (Secure ? 16993 : 16992), "wsman");
                return newUri.Uri;
            }
        }

        /// <summary>
        /// Indicates whether or not to use TLS in the connection.
        /// </summary>
        public bool Secure { set; get; }

        /// <summary>
        /// Certificate name (as it appears in the subject field of the certificate)
        /// </summary>
        public string Certificate { get; set; }

        /// <summary>
        /// Enum that represents the authentication type
        /// </summary>
        public AuthMethod Auth { set; get; }

        /// <summary>
        /// Indicates whether or not to use a proxy in the connection.
        /// </summary>
        public IWebProxy Proxy { set; get; }

        /// <summary>
        /// Use a SOCKS proxy. Needed for redirection connections.
        /// </summary>
        public SocksProxy SoxProxy { get; set; }
    }

    /// <summary>
    /// This class represents a management session: the host to connect to and how
    /// (as represented in the ConnectionInfo), and the management transport to use,
    /// which should be either "ws-man", "soap", or "none".
    /// </summary>
    public class ManagedSystem : ICloneable
    {
        /// <summary>
        /// WS-Man Connection.
        /// </summary>
        public const string TRANSPORT_WS_MAN = "ws-man";

        /// <summary>
        /// Soap Connection.
        /// </summary>
        public const string TRANSPORT_SOAP = "soap";    // not used much right now

        #region ICloneable interface implementation
        /// <summary>
        /// Clone - return a new copy of this object.
        /// </summary>
        /// <returns></returns>
        public object Clone()
        {
            ConnectionInfo i = (ConnectionInfo)this.ConnectionInfo.Clone();
            ManagedSystem m = new ManagedSystem(i, this.TransportMechanism);

            return m;
        }
        #endregion

        /// <summary>
        /// The connection information for this session.
        /// </summary>
        public ConnectionInfo ConnectionInfo { get; set; }

        /// <summary>
        /// The transport mechanism to use
        /// </summary>
        public string TransportMechanism { get; set; }

        /// <summary>
        /// Constructor.
        /// </summary>
        /// <param name="info">The connection information for this session.</param>
        /// <param name="transport">The transport mechanism to use</param>
        public ManagedSystem(ConnectionInfo info, string transport)
        {
            ConnectionInfo = info;
            TransportMechanism = transport;
        }

        /// <summary>
        /// Constructor.
        /// </summary>
        /// <param name="info">The connection information for this session.</param>
        public ManagedSystem(ConnectionInfo info)
        {
            ConnectionInfo = info;
            TransportMechanism = TRANSPORT_WS_MAN;
        }
    }


}