using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Web.Services.Description;
using System.Xml;

namespace Sea.Hus.Service.Agent
{
    /// <summary>
    /// 动态调用WebService代理类
    /// </summary>
    public class WebServiceAgent
    {
        private object agent;
        private Type agentType;
        private const string CODE_NAMESPACE = "See.WebServiceAgent.Dynamic";
        
        /// <summary>
        /// 构造
        /// </summary>
        /// <param name="url"></param>
        public WebServiceAgent(string url)
        {
            try
            {
                XmlTextReader reader = new XmlTextReader(url + "?wsdl");

                //创建和格式化 WSDL 文档
                ServiceDescription sd = ServiceDescription.Read(reader);

                //创建客户端代理代理类
                ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
                sdi.AddServiceDescription(sd, null, null);

                //使用 CodeDom 编译客户端代理类
                CodeNamespace cn = new CodeNamespace();
                CodeCompileUnit ccu = new CodeCompileUnit();
                ccu.Namespaces.Add(cn);
                sdi.Import(cn, ccu);
                Microsoft.CSharp.CSharpCodeProvider icc = new Microsoft.CSharp.CSharpCodeProvider();

                CompilerParameters cp = new CompilerParameters();
                cp.ReferencedAssemblies.Add("System.dll");
                cp.ReferencedAssemblies.Add("System.XML.dll");
                cp.ReferencedAssemblies.Add("System.Web.Services.dll");
                cp.ReferencedAssemblies.Add("System.Data.dll");

                CompilerResults cr = icc.CompileAssemblyFromDom(cp, ccu);
                agentType = cr.CompiledAssembly.GetTypes()[0];
                agent = Activator.CreateInstance(agentType);
                //设置超时时间
                ((System.Web.Services.Protocols.WebClientProtocol)(agent)).Timeout = 200000;//毫秒
            }
            catch (System.Exception ex)
            {throw;
            }
            
        }

        ///<summary>
        ///调用指定的方法
        ///</summary>
        ///<param name="methodName">方法名，大小写敏感</param>
        ///<param name="args">参数，按照参数顺序赋值</param>
        ///<returns>Web服务的返回值</returns>
        public object Invoke(string methodName, params object[] args)
        {

            MethodInfo mi = agentType.GetMethod(methodName);
            return this.Invoke(mi, args);
        }

        ///<summary>
        ///调用指定方法
        ///</summary>
        ///<param name="method">方法信息</param>
        ///<param name="args">参数，按照参数顺序赋值</param>
        ///<returns>Web服务的返回值</returns>
        public object Invoke(MethodInfo method, params object[] args)
        {
            return method.Invoke(agent, args);
        }
    }
}