using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Serialization;
using ZLPlugin_LisPacs_MR.Domain.Units;
namespace ZLPlugin_LisPacs_MR.Domain.Web
{
    public class WebServiceCaller
    {
        #region Tip:使用说明
        //调用示例：
        //Hashtable ht = new Hashtable();  //Hashtable 为webservice所需要的参数集
        //ht.Add("str", "test");
        //ht.Add("b", "true");
        //XmlDocument xx = WebSvcCaller.QuerySoapWebService("http://localhost:81/service.asmx", "HelloWorld", ht);
        //MessageBox.Show(xx.OuterXml);
        #endregion



        /// <summary>
        /// 通用WebService调用(Soap),参数Pars为string类型的参数名、参数值
        /// </summary>
        public static string SoapWebQuery(string URL, string MethodName, Hashtable Pars)
        {
            try
            {
                Log.Info("Web调用：");
                Log.Info("URL：" + URL);
                Log.Info("MethodName：" + MethodName);

                HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
                request.Method = "POST";
                request.ContentType = "text/xml; charset=utf-8";
                SetWebRequest(request);
                var message = Encoding.UTF8.GetBytes(ParsToSoapMessage(MethodName, Pars).OuterXml);
                Log.Info("message：" + Encoding.UTF8.GetString(message));
                WriteRequestData(request, message);
                var result = ReadXmlResponse(request.GetResponse());
                Log.Info("result：" + result.OuterXml);
                return GetReturnString(result);

            }
            catch (Exception ex)
            {
                throw new Exception("平台信息:" + ex.Message);
            }
        }
        /// <summary>
        /// 根据方法名和参数生成请求报文
        /// </summary>
        /// <param name="MethodName">方法名</param>
        /// <param name="Pars">参数</param>
        /// <returns></returns>
        private static XmlDocument ParsToSoapMessage(string MethodName, Hashtable Pars)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml("<s:Envelope xmlns:s=\"http://schemas.xmlsoap.org/soap/envelope/\"></s:Envelope>");

            XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);
            doc.InsertBefore(decl, doc.DocumentElement);
            XmlElement soapBody = doc.CreateElement("s", "Body", "http://schemas.xmlsoap.org/soap/envelope/");
            soapBody.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
            soapBody.SetAttribute("xmlns:xsd", "http://www.w3.org/2001/XMLSchema");
            XmlElement soapMethod = doc.CreateElement(MethodName);
            soapMethod.SetAttribute("xmlns", "http://service.delivery.gzsino.com/");
            foreach (string k in Pars.Keys)
            {
                XmlElement soapPar = doc.CreateElement(k);
                soapPar.InnerXml = ObjectToSoapXml(Pars[k]);
                soapPar.SetAttribute("xmlns", "");
                soapMethod.AppendChild(soapPar);
            }
            soapBody.AppendChild(soapMethod);
            doc.DocumentElement.AppendChild(soapBody);
            return doc;
        }


        /// <summary>
        /// 类型转化成Xml
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        private static string ObjectToSoapXml(object o)
        {
            Type type = o.GetType();
            if (!type.Name.Contains("string"))
            {
                XmlSerializer mySerializer = new XmlSerializer(type);
                MemoryStream ms = new MemoryStream();
                mySerializer.Serialize(ms, o);
                XmlDocument doc = new XmlDocument();
                doc.LoadXml(Encoding.UTF8.GetString(ms.ToArray()));
                if (doc.DocumentElement != null)
                {
                    return doc.DocumentElement.InnerXml;
                }
                else
                {
                    return o.ToString();
                }
            }
            else return o.ToString();
        }

        /// <summary>
        /// 设置凭证与超时时间
        /// </summary>
        /// <param name="request"></param>
        private static void SetWebRequest(HttpWebRequest request)
        {
            request.Credentials = CredentialCache.DefaultCredentials;
            request.Timeout = 10000;
        }

        /// <summary>
        /// 网络请求写入内容
        /// </summary>
        /// <param name="request"></param>
        /// <param name="data"></param>
        private static void WriteRequestData(HttpWebRequest request, byte[] data)
        {
            request.ContentLength = data.Length;
            Stream writer = request.GetRequestStream();
            writer.Write(data, 0, data.Length);
            writer.Close();
        }
        /// <summary>
        /// 网络请求读取内容
        /// </summary>
        /// <param name="response"></param>
        /// <returns></returns>
        private static XmlDocument ReadXmlResponse(WebResponse response)
        {
            StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            string retXml = sr.ReadToEnd();
            sr.Close();
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(retXml);
            return doc;
        }
        /// <summary>
        /// 读取内容解析返回值
        /// </summary> 
        /// <param name="doc"></param>
        /// <returns></returns>
        private static string GetReturnString(XmlDocument doc)
        {
            string str = doc.InnerText;
            str = str.Replace("&", "&amp;");
            return str;
        }

    }
}