using bsmd.database;
using System;
using System.Collections.Generic;
using System.IO;
using System.Xml;
using System.Xml.Serialization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using log4net;
using System.Xml.Linq;

namespace bsmd.hisnord
{
    public class Response
    {

        private static ILog _log = LogManager.GetLogger(typeof(Response));
        

        public static void ReadAnswers()
        {
            foreach (string answerFile in Directory.GetFiles(Properties.Settings.Default.AnswerDir))
            {
                bool isOK = true;

                // Informationen aus dem Dateinamen 
                // Meldetyp_Referenz_ID_Timestamp.xml
                string bareFileName = Path.GetFileNameWithoutExtension(answerFile);
                string[] fileNameElems = bareFileName.Split('_');

                if (fileNameElems.Length < 4)
                {
                    _log.WarnFormat("ANSWER file {0}.xml has an invalid file name", bareFileName);
                    isOK = false;
                }
                else
                {
                    int prozessStatus;
                    if (!Int32.TryParse(fileNameElems[fileNameElems.Length - 1], out prozessStatus))
                    {
                        _log.WarnFormat("ANSWER file {0}.xml has no process status at the end (2..6)", bareFileName);
                        isOK = false;
                    }
                    else
                    {
                        int timestampMilliSecs;
                        if (!Int32.TryParse(fileNameElems[fileNameElems.Length - 2], out timestampMilliSecs))
                        {
                            _log.WarnFormat("ANSWER file {0}.xml has no readable timestamp", bareFileName);
                            isOK = false;
                        }
                        else
                        {
                            string refId = fileNameElems[fileNameElems.Length - 3];
                            string meldeTyp = fileNameElems[fileNameElems.Length - 4];
                            if (fileNameElems.Length == 5)
                                meldeTyp = string.Format("{0}_{1}", fileNameElems[fileNameElems.Length - 5], meldeTyp);

                            // TODO: klären was man hier liest: reguläre Antwort oder Schnittstellenfehler
                            // XML Linq statt Serialisierung
                            try
                            {
                                XElement xml = XElement.Load(answerFile);

                                // declare Namespaces
                                XNamespace ns1 = "http://api.national-single-window.de/visitIdRequest";
                                XNamespace ns6 = "http://api.national-single-window.de/receipt";
                                //XNamespace ns15 = "http://api.national-single-window.de/statusForClientRequestId";
                                XNamespace soap = "http://schemas.xmlsoap.org/soap/envelope/";
                                XNamespace ns15 = "http://api.national-single-window.de/visitIdResponse";

                                if(xml.Descendants("SystemError").Count() > 0)
                                {
                                    // Fehlernachricht
                                    SystemError systemError = new SystemError(xml);

                                    // Speichern

                                }
                                else
                                {
                                    // NSW Rückmeldung
                                    NSWResponse nswResponse = new NSWResponse(xml);

                                    // Rückmeldung auswerten


                                }

                                
                                /*
                                if (visitIdResponse != null)
                                {
                                    _log.InfoFormat("HIS-NORD: Visit-ID {0} delivered for Core {1}", visitIdResponse.VisitId, visitIdResponse.ClientRequestId);
                                    // update MessageCore
                                    if (visitIdResponse.ClientRequestId != null)
                                    {
                                        Guid messageCoreId;
                                        if (Guid.TryParse(visitIdResponse.ClientRequestId, out messageCoreId))
                                        {
                                            MessageCore answerCore = DBManager.Instance.GetMessageCoreById(messageCoreId);
                                            if (answerCore == null)
                                            {
                                                _log.WarnFormat("HIS-NORD: Core not found for notification id {0}", visitIdResponse.NotificationId);
                                            }
                                            else
                                            {
                                                if (!answerCore.IsTransit)
                                                    answerCore.VisitId = visitIdResponse.VisitId;
                                                else
                                                    answerCore.TransitId = visitIdResponse.VisitId;
                                                answerCore.BSMDStatusInternal = MessageCore.BSMDStatus.RESPONDED;
                                                DBManager.Instance.Save(answerCore);
                                            }
                                        }
                                        else
                                        {
                                            _log.WarnFormat("{0} ANSWER parsed, but MessageCoreId is no Guid: {1}",
                                                Path.GetFileName(answerFile), visitIdResponse.ClientRequestId);
                                        }
                                    }
                                    else
                                    {
                                        _log.WarnFormat("Client request id is null in {0}", answerFile);
                                    }
                                }
                                */
                            }
                            catch(Exception ex)
                            {
                                _log.WarnFormat("Exception deserializing ANSWER file: {0}", ex.ToString());
                                isOK = false;
                            }
                        }
                    }
                }
                
                if(isOK)
                {
                    // archive file
                    File.Move(answerFile, Path.Combine(Properties.Settings.Default.AnswerArchiveDir, Path.GetFileName(answerFile)));
                }
                else
                {
                    File.Move(answerFile, Path.Combine(Properties.Settings.Default.AnswerCorruptDir, Path.GetFileName(answerFile)));
                }
            }
        }

    }
}