using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel.Channels;
using System.ServiceModel;

namespace SiaSun.LMS.Common
{
    public class WCFHelper
    {
        #region Wcf服务工厂

        public static T Create<T>(string url)
        {
            return Create<T>(url, "WSHttpBinding");
        }

        public static T Create<T>(string url, string bing)
        {
            if (!string.IsNullOrEmpty(url))
            {
                try
                {          
                    EndpointAddress address = new EndpointAddress(url);
                    System.ServiceModel.Channels.Binding binding = CreateBinding(bing);
                    ChannelFactory<T> factory = new ChannelFactory<T>(binding, address);
                    foreach (System.ServiceModel.Description.OperationDescription op in factory.Endpoint.Contract.Operations)
                    {
                        System.ServiceModel.Description.DataContractSerializerOperationBehavior dataContractBehavior =
                                    op.Behaviors.Find<System.ServiceModel.Description.DataContractSerializerOperationBehavior>()
                                    as System.ServiceModel.Description.DataContractSerializerOperationBehavior;
                        if (dataContractBehavior != null)
                        {
                            dataContractBehavior.MaxItemsInObjectGraph = 2147483647;
                        }
                    }

                    return factory.CreateChannel();
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
            return default(T);
        }

        #endregion

        #region 创建传输协议
        /// <summary>
        /// 创建传输协议
        /// </summary>
        /// <param name="binding">传输协议名称</param>
        /// <returns></returns>
        public static System.ServiceModel.Channels.Binding CreateBinding(string binding)
        {
            System.ServiceModel.Channels.Binding bindinginstance = null;

            if (binding.ToLower() == "basichttpbinding")
            {
                BasicHttpBinding ws = new BasicHttpBinding();
                bindinginstance = ws;
            }
            else if (binding.ToLower() == "wshttpbinding")
            {
                BasicHttpBinding ws = new BasicHttpBinding();
                ws.CloseTimeout = new TimeSpan(0, 5, 0);
                ws.OpenTimeout = new TimeSpan(0, 5, 0);
                ws.ReceiveTimeout = new TimeSpan(0, 5, 0);
                ws.SendTimeout = new TimeSpan(0, 5, 0);

                ws.ReaderQuotas.MaxArrayLength = 2147483647;
                ws.ReaderQuotas.MaxStringContentLength = 2147483647;
                ws.ReaderQuotas.MaxBytesPerRead = 2147483647;

                ws.MaxBufferSize = 2147483647;
                ws.MaxBufferPoolSize = 2147483647;
                ws.MaxReceivedMessageSize = 2147483647;

                ws.TextEncoding = Encoding.UTF8;
                ws.MessageEncoding = WSMessageEncoding.Text;
                bindinginstance = ws;
            }
            else if (binding.ToLower() == "netnamedpipebinding")
            {
                NetNamedPipeBinding ws = new NetNamedPipeBinding();
                bindinginstance = ws;
            }
            else if (binding.ToLower() == "netpeertcpbinding")
            {
                NetPeerTcpBinding ws = new NetPeerTcpBinding();
                bindinginstance = ws;
            }
            else if (binding.ToLower() == "nettcpbinding")
            {
                NetTcpBinding ws = new NetTcpBinding();
                bindinginstance = ws;
            }
            else if (binding.ToLower() == "wsdualhttpbinding")
            {
                WSDualHttpBinding ws = new WSDualHttpBinding();
                bindinginstance = ws;
            }
            else if (binding.ToLower() == "wsfederationhttpbinding")
            {
                WSFederationHttpBinding ws = new WSFederationHttpBinding();
                bindinginstance = ws;
            }
            return bindinginstance;

        }
        #endregion

    }

}