using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;
using System.Collections;

public partial class _Default : System.Web.UI.Page
{
    private string pollid = ""; //id for the poll
    private string title = ""; //title of the poll
    private string IP = ""; //IP of the submitter
    private int timestamp = 0; //when submitted
    private Hashtable questiontypes; //associates questions w/ the typ they are (radio, text, etc)

    private XmlDocument doc; //holds XML data of surveyresults.xml

    protected void Page_Load(object sender, EventArgs e)
    {
        string thanks = Request.Form["thanks"]; //location of thank redirect
        string[] questions; //string array of the questions
        string[] types; //string array of the question types

        doc = new XmlDocument();

        //Grab the poll id, title, and the submitter's IP and time of submission
        pollid = Request.Form["id"];
        title = Request.Form["title"];
        IP = Request.ServerVariables["REMOTE_ADDR"];

        TimeSpan t = (DateTime.UtcNow - new DateTime(1970, 1, 1));
        timestamp = (int)t.TotalSeconds;


        if (thanks[0] != '/')
        {
            thanks = '/' + thanks;
        }

        //Associate questions with their type (differentiates text and multiple choice)
        questions = (Request.Form["inputnames"]).Split(',');
        types = (Request.Form["inputvalues"]).Split(',');

        questiontypes = new Hashtable();

        for (int i = 0; i < questions.Length; i++)
        {
            questiontypes[questions[i]] = types[i];
        }

        //If file exists load it, else build from scratch
        if (System.IO.File.Exists("surveyresults.xml"))
        {
            doc.Load("surveyresults.xml");
        }
        else
        {
            doc.AppendChild(doc.CreateElement("survey"));
        }

        //Start at the root node
        XmlNode node = doc.SelectSingleNode("//survey");

        if (!entryExists(node))
        {
            //Add users response to the XML file
            addResponse(node);

            //Write updated XML out to file
            System.IO.TextWriter writer = new System.IO.StreamWriter("surveyresults.xml", false);
            System.IO.StringWriter sw = new System.IO.StringWriter();
            System.Xml.XmlTextWriter xw = new System.Xml.XmlTextWriter(sw);
            node.WriteTo(xw);

            writer.Write(sw.ToString());

            writer.Close();

            //Write out updated XML to CMS
            outputToCMS();
        }

        //Go to 'Thank You' page
        Response.Redirect("http://" + Request.ServerVariables["SERVER_NAME"] + thanks);

    }

    //Adds a response to the current poll
    private void addResponse(XmlNode node)
    {
        XmlNode poll = null;

        //Tries to find if the current poll exists in XML.  If not, make new node
        try
        {
            poll = doc.SelectSingleNode("//poll[@id=\"" + pollid + "\"]");
        }
        catch
        {
            main.Text += "In function addResponse:  Selecting poll threw an exception";
            return;
        }

        if (poll == null)
        {
            poll = doc.CreateElement("poll");
        }

        //Build poll attributes
        XmlAttribute id = doc.CreateAttribute("id");
        id.Value = pollid;
        XmlAttribute t = doc.CreateAttribute("title");
        t.Value = title;
        poll.Attributes.Append(id);
        poll.Attributes.Append(t);
        node.AppendChild(poll);

        //Build response IP and timestamp
        XmlElement response = doc.CreateElement("response");
        XmlElement ip = doc.CreateElement("IP");
        ip.AppendChild(doc.CreateTextNode(IP));

        XmlElement time = doc.CreateElement("timestamp");
        time.AppendChild(doc.CreateTextNode(timestamp.ToString()));

        response.AppendChild(ip);
        response.AppendChild(time);

        //Build multiple choice and text nodes
        buildQuestionNodes(response);

        //Attach response to poll
        poll.AppendChild(response);


    }

    //Adds the questions and their answers to the response

    private void buildQuestionNodes(XmlNode response)
    {
        XmlNode mc = doc.CreateElement("multiplechoice");
        XmlNode tex = doc.CreateElement("text");

        foreach (string key in Request.Form.Keys)
        {
            //Skip the hidden inputs
            if (key != "thanks" && key != "inputnames" && key != "inputvalues" && key != "id" && key != "title")
            {
                //Create question node with the answer as its value
                XmlElement q = doc.CreateElement(key);
                q.AppendChild(doc.CreateTextNode(Request.Form[key]));

                //If it's multiple choice, grab (or make) multiple choice node, then attach question with answer
                if (((string)questiontypes[key]) == "radio" || ((string)questiontypes[key]) == "checkbox" || ((string)questiontypes[key]) == "dropdown")
                {
                    try
                    {
                        mc = response.SelectSingleNode("//multiplechoice");
                    }
                    catch
                    {
                        main.Text += "Selecting 'multiplechoice' node threw an exception";
                        return;
                    }

                    if (mc == null)
                    {
                        mc = doc.CreateElement("multiplechoice");
                    }

                    mc.AppendChild(q);
                    response.AppendChild(mc);

                }

                //It's a text answer, add it to the text node
                else
                {
                    try
                    {
                        tex = response.SelectSingleNode("//text");
                    }
                    catch
                    {
                        main.Text += "Selecting 'text' node threw an exception";
                        return;
                    }

                    if (tex == null)
                    {
                        tex = doc.CreateElement("text");
                    }

                    tex.AppendChild(q);
                    response.AppendChild(tex);

                }
            }
        }
    }

    //Checks if user submitted within the last 24 hrs.  If so, don't add the response to the XML
    private bool entryExists(XmlNode node)
    {
        XmlNode n;

        //Find the current poll
        try
        {
            n = node.SelectSingleNode("//poll[@id=\"" + pollid + "\"]");
        }
        catch
        {
            main.Text += "In function entryExists:  Selecting poll threw an exception";
            return false;
        }

        if (n == null)
        {
            return false;
        }

        //Loop through responses.  If IP matches and timestamp difference is < 24 hrs, break out
        foreach (XmlNode r in n.ChildNodes)
        {
            if (r.SelectSingleNode("IP").ChildNodes[0].Value == IP)
            {
                if (timestamp - Convert.ToInt32(r.SelectSingleNode("timestamp").ChildNodes[0].Value) < 86400)
                    return true;
            }
        }

        return false;
    }

    //Write out to the CMS
    private void outputToCMS()
    {
        string CMSURL; //URL of the CMS
        string cmsdirectory; //where in CMS to write to
        string username; //for login to CMS
        string password; //for login to CMS
        string data; //data to submit

        //Load configuration settings
        if (System.IO.File.Exists("survey-config.xml"))
        {
            XmlDocument d = new XmlDocument();
            d.Load("survey-config.xml");
            CMSURL = d.SelectSingleNode("//CMSURL").ChildNodes[0].Value;
            cmsdirectory = d.SelectSingleNode("//cmsdirectory").ChildNodes[0].Value;
            username = d.SelectSingleNode("//username").ChildNodes[0].Value;
            password = d.SelectSingleNode("//password").ChildNodes[0].Value;
        }
        else
        {
            main.Text += "Could not find config file";
            return;
        }

        //Convert XML data to a string
        System.IO.StringWriter sw = new System.IO.StringWriter();
        System.Xml.XmlTextWriter xw = new System.Xml.XmlTextWriter(sw);
        doc.WriteTo(xw);

        data = sw.ToString();

        //Set up WSDL object for SOAP call
        wsdl.AssetOperationHandlerService service = new wsdl.AssetOperationHandlerService();
        service.Url = CMSURL + "/ws/services/AssetOperationService?wsdl";
        wsdl.authentication auth = new wsdl.authentication();
        auth.username = username;
        auth.password = password;

        wsdl.xmlBlock block = new wsdl.xmlBlock();
        block.name = "survey-results";
        block.parentFolderPath = cmsdirectory;
        block.path = cmsdirectory + "/survey-results";
        block.metadataSetPath = "/Default";
        block.xml = data;

        wsdl.asset asset = new wsdl.asset();
        asset.xmlBlock = block;

        wsdl.operationResult result = new wsdl.operationResult();

        //Attempt to edit first, then create if it doesn't exist
        try
        {
            result = service.edit(auth, asset);

            if (result.success == "false")
            {
                block.path = "";
                result = service.create(auth, asset);
            }
        }
        catch
        {
            main.Text += "Block creation/edit request failed to conform to the WSDL.\n" + result.message;
        }
    }
}