using System;
using System.ServiceModel;

namespace WCFSimple.Contract
{
    [ServiceContract]
    public interface IService
    {
        [OperationContract]
        string Hello();
    }
}



namespace WCFSimple.ClientSide
{

    public class Client
    {

        public static class Requests
        {
            public static string Hello()
            {
                string response = "";

                try
                {
                    response = WCFSimple.ClientSide.Client.Service.Hello();
                }
                catch (TimeoutException ex)
                {

                }
                catch (Exception ex)
                {
                }

                return response;
            }
        }


        #region Connection

        public static ChannelFactory<WCFSimple.Contract.IService> scf;


        public static WCFSimple.Contract.IService Service;

        public static void CreateConnection(string host, int port)
        {

            NetTcpBinding tcpBind = new NetTcpBinding();
            tcpBind.ReliableSession.Enabled = true;
            tcpBind.ReliableSession.Ordered = false;
            tcpBind.ReliableSession.InactivityTimeout = TimeSpan.FromMinutes(10);

            scf = new ChannelFactory<WCFSimple.Contract.IService>(
                //new NetTcpBinding(),
                tcpBind,
                String.Format("net.tcp://{0}:{1}", host, port));


            Service = WCFSimple.ClientSide.Client.scf.CreateChannel();

        }

        public static void CloseConnection()
        {
            try
            {
                if((Service as ICommunicationObject).State == CommunicationState.Opened)
                    (Service as ICommunicationObject).Close();
            }
            catch (CommunicationException ex) { }
            catch (Exception ex) { }
        }

        #endregion

    }
}

namespace WCFSimple
{
    class Program
    {
        static void Main(string[] args)
        {

            #region input check

            string host;
            int port;

            try
            {
                host = args[0];
                port = Convert.ToInt16(args[1]);
            }
            catch
            {
                return;
            }

            #endregion


            WCFSimple.ClientSide.Client.CreateConnection(host, port);

            string response = WCFSimple.ClientSide.Client.Requests.Hello();

            ClientSide.Client.CloseConnection();


            if(!String.IsNullOrEmpty(response))
            {
                Console.WriteLine("CLIENT> Response from service: " + response);
            }
            else
                Console.WriteLine("CLIENT> No response");

        }
    }
}