// Copyright (c) 2017 schick Informatik
// Description: Query NSW via HIS-Nord for free / taken message classes and visit id

using System;
using System.Collections.Specialized;
using System.Text;
using System.Net;
using System.Web;

using log4net;
using bsmd.database;

namespace bsmd.status
{
    public class Status
    {

        private static readonly ILog _log = LogManager.GetLogger(typeof(bsmd.status.Status));
        private readonly MessageCore _queryCore;

        public Status(MessageCore core2Query) { _queryCore = core2Query; }

        public void PerformQuery()
        {
            if (this._queryCore == null) return;

            using (WebClient client = new WebClient())
            {

                try
                {

                    string encodedLogin = HttpUtility.HtmlEncode(Properties.Settings.Default.login);
                    string encodedPW = HttpUtility.HtmlEncode(Properties.Settings.Default.password);

                    NameValueCollection postCollection = new NameValueCollection()
                       {
                        // ich glaube ein HTML Encoding braucht man hier nicht?
                        { "login", encodedLogin },
                        { "password", encodedPW },
                        { "visitIdTransitId", _queryCore.IsTransit ? _queryCore.TransitId : _queryCore.VisitId },
                        { "format", Properties.Settings.Default.format }
                       };

                    
                    string uploadString = string.Format("login={0}&password={1}&visitIdTransitId={2}&format=xml", encodedLogin, encodedPW, _queryCore.IsTransit ? _queryCore.TransitId : _queryCore.VisitId);
                    _log.InfoFormat("Upload string: {0}", encodedLogin, encodedPW);
                    client.Headers[HttpRequestHeader.ContentType] = "application/x-www-form-urlencoded";

                    string resultString = client.UploadString(new Uri(Properties.Settings.Default.url), uploadString);

                    // Do some log output

                    //string resultString = Encoding.UTF8.GetString(resultData);

                    _log.InfoFormat("Status query result: {0}", resultString);

                    dataset result = null;
                    try
                    {
                        result = dataset.ReadStatus(resultString);
                    }
                    catch (Exception ex)
                    {
                        _log.ErrorFormat("Error parsing status request result: {0}", ex.ToString());
                    }

                    if (result != null)
                    {
                        // Update database with result values                        

                        if (result.NswResponse != null)
                        {
                            // three-way bool!
                            if (result.NswResponse.Cancelled != null)
                                _queryCore.Cancelled = result.NswResponse.Equals("Y");
                            else
                                _queryCore.Cancelled = null;

                            if (result.NswResponse.VisitIdOrTransitIdCancellable != null)
                                _queryCore.VisitIdOrTransitIdCancellable = result.NswResponse.VisitIdOrTransitIdCancellable.Equals("Y");
                            else
                                _queryCore.VisitIdOrTransitIdCancellable = null;

                            _queryCore.BlockedNotificationClasses = result.NswResponse.BlockedNotificationClasses;
                            _queryCore.OwnNotificationClasses = result.NswResponse.OwnNotificationClasses;
                            _queryCore.FreeNotificationClasses = result.NswResponse.FreeNotificationClasses;
                            _queryCore.StatusCheckErrorCode = result.NswResponse.ErrorCode;
                            string errorText = result.NswResponse.ErrorMessage;
                            if ((errorText != null) && (errorText.Length > 512)) errorText = errorText.Substring(0, 512);
                            _queryCore.StatusCheckErrorMessage = errorText;

                        }
                        else
                        {
                            if(result.LoginError != null)
                            {
                                _log.ErrorFormat("Login error: {0}", result.LoginError);
                            }
                        }
                    }
                    else
                    {
                        _log.Error("parsing result status failed");
                    }
                }
                catch (Exception e)
                {
                    _log.ErrorFormat("Error uploading status request values: {0}", e.ToString());
                    _queryCore.StatusCheckErrorMessage = string.Format("Exception trying to reach HIS-Nord service: {0}", e.Message);
                }

                DBManager.Instance.Save(_queryCore);
                
            }
        }
    }
}