using System;
using System.Collections.Generic;
//using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml;
using System.Net;
using System.DirectoryServices;
using System.Text;

namespace CityAutoLogin
{
    public partial class _Default : Page
    {
        private const string ACCOUNT = "LG8New";

        // GetXML makes the http request in sQueryString and returns the response.
        private static XmlDocument GetXML(string sQueryString)
        {
            HttpWebRequest oRequest = (HttpWebRequest)WebRequest.Create(sQueryString);
            HttpWebResponse oResponse = (HttpWebResponse)oRequest.GetResponse();
            XmlDocument oResponseXML = new XmlDocument();
            oResponseXML.Load(oResponse.GetResponseStream());
            return (oResponseXML);
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            try
            {
                string Path = User.Identity.Name; // domain\user
                //WindowsIdentity id = WindowsIdentity.GetCurrent();
                //Request.ServerVariables["REMOTE_USER"]
                //Request.ServerVariables["LOGON_USER"]
                //Request.ServerVariables["AUTH_USER"]
                string[] UserPath = Path.Split(new char[] { '\\' });
                string UserName = UserPath[UserPath.Length - 1];

                // find the user in Active Directory
                DirectorySearcher Search = new DirectorySearcher();
                Search.Filter = String.Format("(SAMAccountName={0})", UserName);
                Search.PropertiesToLoad.Add("memberOf");
                SearchResult rslt = Search.FindOne();

                string Group = "";
                if (rslt == null)
                {
                    ErrLabel.Text = "No Group Error";
                }
                else
                {
                    int GroupCount = rslt.Properties["memberOf"].Count;
                    for (int counter = 0; counter < GroupCount; counter++)
                    {
                        string MemberString = (string)rslt.Properties["memberOf"][counter];

                        // Update this code to parse MemberString according to how each city has AD set up
                        // MemberString is in LDAP format:
                        //    CN=Planning,OU=Planning,DC=dmpclient,DC=local
                        if (MemberString.Contains("OU=Planning"))
                            Group = "Planning";
                        else if (MemberString.Contains("OU=Public Works"))
                            Group = "PublicWorks";
                        else
                            Group = "Error";
                    }
                }

                // getSIK  - this does the authentication that creates a "Session Initialization Key"
                // server IP must be registered with DMP for this to work
                string sQueryString = "http://dc1.parcelstream.com/admin/getSIK.aspx?login=" + UserName + "&account=" + ACCOUNT + "&group=" + Group;
                XmlDocument oResponseXML = GetXML(sQueryString);

                XmlNode oNode = oResponseXML.SelectSingleNode("Response/Success");
                if (oNode == null) throw (new Exception("Could not authenticate: " + oResponseXML.SelectSingleNode("Response/Error/@message").Value));
                // Get Authentication site and key
                //  Success response looks like:
                // <Response>
                //     <Success message="/dc1/_T195/3af82f3b-d8b5-4353-8fdd-edb2206ec300-100850_275307" /> 
                // </Response>
                // message format is "/<data center>/<TempFolder>/<Guid>"
                // need to separate the components to generate the input to InitSession
                string fullSIK = oNode.Attributes["message"].Value;
                string[] sAuth = oNode.Attributes["message"].Value.Split(new char[] { '/' });
                string sDC = sAuth[1];
                string sKey = sAuth[2] + "/" + sAuth[3];  //   /<TempFolder>/<Guid>
                string sFold = sAuth[2];

                string url = string.Format("http://maps.digitalmapcentral.com/production/Dashboard/app/city.aspx?loginPage=http://maps.digitalmapcentral.com/&sik={0}", fullSIK);
                HttpContext.Current.Response.BufferOutput = true;
                HttpContext.Current.Response.Redirect(url);
                //Server.Transfer(url);
            }
            catch (Exception ex)
            {
                Response.Write(ex.Message);
                Response.Write(ex.StackTrace);
            }
        }
    }
}