using System;
using System.Configuration;
using System.IO;
using System.Text;
using System.Web;
using System.Xml;

namespace SampleEndPoint
{
    /// <summary>
    /// Summary description for DirectPharmacy1
    /// </summary>
    public class SampleEndpointBuiltFromSampleCode : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            string response = WenoMessage();
            context.Response.Write(response);
        }
        public string WenoMessage()
        {
            string response = "";

            try
            {
                // To receive authorization info which is userid:password format
                string authStr = HttpContext.Current.Request.Headers["Authorization"].Replace("Basic ", "");
                authStr = Encoding.UTF8.GetString(Convert.FromBase64String(authStr));
                string messageID = "0";
                MemoryStream ms = new MemoryStream();
                // get message
                HttpContext.Current.Request.InputStream.CopyTo(ms);
                string XMLMessage = System.Text.Encoding.UTF8.GetString(ms.ToArray());
                XmlDocument xReq = new XmlDocument();
                xReq.LoadXml(XMLMessage);

                // fetch message id
                string sMessagePath = @"/*[local-name() = 'Message']/*[local-name() = 'Header']/*[local-name() = 'MessageID']";
                XmlNode messNode = xReq.SelectSingleNode(sMessagePath);
                if (messNode != null)
                {
                    messageID = messNode.InnerText;
                }
                string sFromPath = @"/*[local-name() = 'Message']/*[local-name() = 'Header']/*[local-name() = 'From']";
                string sToPath = @"/*[local-name() = 'Message']/*[local-name() = 'Header']/*[local-name() = 'To']";

                string sFrom = "";
                string sTo = "";
                string sToQual;
                string sFromQual;

                XmlNode fromNode = xReq.SelectSingleNode(sFromPath);
                XmlNode toNode = xReq.SelectSingleNode(sToPath);
                if (fromNode != null && toNode != null)
                {
                    sFrom = fromNode.InnerText;
                    sTo = toNode.InnerText;
                    if (fromNode.InnerText.ToUpper().Contains("D"))
                    {
                        sFromQual = "D";
                        sToQual = "P";
                    }
                    else
                    {
                        sFromQual = "P";
                        sToQual = "D";
                    }
                }
                string messType = "Unknown_Type";
                string sMessageTypePath = @"/*[local-name() = 'Message']/*[local-name() = 'Body']";
                if (xReq.SelectSingleNode(sMessageTypePath) != null)
                    messType = xReq.SelectSingleNode(sMessageTypePath).ChildNodes[0].Name;

                // store/process message as per your requirement
                WriteFile(XMLMessage, messType + "_ " + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".XML");

                string[] arrAuth = authStr.Split(new char[] { ':' });
                if (arrAuth.Length == 2)
                {
                    string reqUserID = arrAuth[0];
                    string reqPassword = arrAuth[1];
                    string ClientUserID = ConfigurationManager.AppSettings["UserID"];
                    string ClientPassword = ConfigurationManager.AppSettings["Password"];
                    // send success/failure message in XML format as specified
                    // To note here that in response to becomes from and from becomes to
                    // If you know you are a pharmacy or ehr you can set hardcoded values here
                    //response = GetStatusXMLFromWeno2017071("001", "Transaction Successfull", "", "M", "WENO");
                    //you can authenticate request as well
                    if (reqUserID == ClientUserID && reqPassword == ClientPassword)
                    {
                        response = GetStatusXMLFromWeno2017071("001", "Transaction Successfull", "", "M", "WENO");
                    }
                    else
                    {
                        response = GetErrorXMLFromWeno2017071("900", "Authentication Failed", "", "M", "WENO", Guid.NewGuid().ToString().Replace("-", ""));
                    }
                }
                else
                {
                    response = GetErrorXMLFromWeno2017071("900", "Invalid request", "", "M", "WENO", Guid.NewGuid().ToString().Replace("-", ""));
                }
            }
            catch (System.Exception ex)
            {
                response = GetErrorXMLFromWeno2017071("900", "Unhandled Error", "", "M", "WENO", Guid.NewGuid().ToString().Replace("-", ""));
            }
            //string sFinalResponse = Convert.ToBase64String(Encoding.UTF8.GetBytes(response));
            return response;
        }
        public static void WriteFile(string strContent, string fileName)
        {
            FileStream fs = null;
            FileInfo fi = new FileInfo(AppDomain.CurrentDomain.BaseDirectory + "\\Messages\\" + fileName);
            if (!fi.Directory.Exists)
            {
                fi.Directory.Create();
            }
            fs = new FileStream(fi.FullName, FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            sw.WriteLine(strContent);
            sw.Close();
            fs.Close();

        }
        public static string GetStatusXML1(string errorCode, string description, string messageID, bool IsError, string fromQual = "", string toQual = "", string from = "", string to = "")
        {

            XmlDocument XMLTemplate = new XmlDocument();
            if (!IsError)
            {
                XMLTemplate.Load(AppDomain.CurrentDomain.BaseDirectory + "\\XMLTemplate\\Status.XML");
            }
            else
            {
                XMLTemplate.Load(AppDomain.CurrentDomain.BaseDirectory + "\\XMLTemplate\\Error.XML");
            }
            XmlNode headerXMLTemplate = XMLTemplate.GetElementsByTagName("Header")[0];
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.FromQualifier}", fromQual);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.From}", from);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.ToQualifier}", toQual);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.To}", to);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.MessageID}", "0");
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.SentTime}", DateTime.Now.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.fffffK"));
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.RelatesToMessageID}", messageID);
            XmlNode bodyXMLTemplate = XMLTemplate.GetElementsByTagName("Body")[0];
            bodyXMLTemplate.InnerXml = bodyXMLTemplate.InnerXml.Replace("{Status.Code}", errorCode);
            bodyXMLTemplate.InnerXml = bodyXMLTemplate.InnerXml.Replace("{Status.Description}", description);
            return XMLTemplate.InnerXml;
        }
        public static string GetStatusXMLFromWeno2017071(string errorCode, string description, string descriptionCode, string toQualifier, string to)
        {
            XmlDocument XMLTemplate = new XmlDocument();
            XMLTemplate.Load(AppDomain.CurrentDomain.BaseDirectory + "\\XMLTemplate\\Status2017071.XML");
            XmlNode headerXMLTemplate = XMLTemplate.GetElementsByTagName("Header")[0];
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.FromQualifier}", "M");
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.From}", "WENO");
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.ToQualifier}", toQualifier);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.To}", to);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.MessageID}", "0");
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.SentTime}", DateTime.Now.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.fffffK"));
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Status.RelatesToMessageID}", "0");
            XmlNode bodyXMLTemplate = XMLTemplate.GetElementsByTagName("Body")[0];
            bodyXMLTemplate.InnerXml = bodyXMLTemplate.InnerXml.Replace("{Status.Code}", errorCode);
            bodyXMLTemplate.InnerXml = bodyXMLTemplate.InnerXml.Replace("{Status.DescriptionCode}", descriptionCode);
            bodyXMLTemplate.InnerXml = bodyXMLTemplate.InnerXml.Replace("{Status.Description}", description);
            return XMLTemplate.InnerXml;
        }
        public static string GetErrorXMLFromWeno2017071(string errorCode, string description, string descriptionCode, string toQualifier, string to, string MessageID = "0", string RelatesToMessageID = "0")
        {
            XmlDocument XMLTemplate = new XmlDocument();
            XMLTemplate.Load(AppDomain.CurrentDomain.BaseDirectory + "\\XMLTemplate\\Error2017071.XML");
            XmlNode headerXMLTemplate = XMLTemplate.GetElementsByTagName("Header")[0];
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Error.FromQualifier}", "M");
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Error.From}", "WENO");
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Error.ToQualifier}", toQualifier);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Error.To}", to);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Error.MessageID}", MessageID);
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Error.SentTime}", DateTime.Now.ToUniversalTime().ToString("yyyy-MM-ddTHH:mm:ss.fffffK"));
            headerXMLTemplate.InnerXml = headerXMLTemplate.InnerXml.Replace("{Error.RelatesToMessageID}", RelatesToMessageID);
            XmlNode bodyXMLTemplate = XMLTemplate.GetElementsByTagName("Body")[0];
            bodyXMLTemplate.InnerXml = bodyXMLTemplate.InnerXml.Replace("{Error.Code}", errorCode);
            bodyXMLTemplate.InnerXml = bodyXMLTemplate.InnerXml.Replace("{Error.DescriptionCode}", descriptionCode);
            bodyXMLTemplate.InnerXml = bodyXMLTemplate.InnerXml.Replace("{Error.Description}", description);
            return XMLTemplate.InnerXml;
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}