using System;
using System.Threading;
using CSLA.Security;
using Chilkat;

namespace GZTW.AyaNova.BLL
{
    /// <summary>
    /// Process client notification list and
    /// deliver appropriately
    /// </summary>
    public class GenProcessClientNotifications
    {
        private GenProcessClientNotifications()
        {
            //
            // TODO: Add constructor logic here
            //
        }

        /// <summary>
        /// Compile a list of all pending Client notifications and deliver them
        /// </summary>
        public static void DeliverNotifications()
        {
            //case 1904
            if (!AyaBizUtils.GlobalSettings.UseNotification) return;

            //case 1904 moved up here for early exit if nothing to process to avoid
            //probing possibly not set up smtp server
            ClientNotificationList nl = ClientNotificationList.GetList();
            if (nl.Count == 0) return;

            NotifyDeliveryLog.LogSMTPDeliveryMessage("Found " + nl.Count.ToString() + " Client notification messages awaiting delivery");

            // Create a mailman object for sending email.
            MailMan mailman = new MailMan();
            mailman.UnlockComponent("AYANVA.CB1052023_c9TZbuFYBd7f");
            // Set the SMTP variables
            mailman.SmtpHost = GZTW.AyaNova.BLL.AyaBizUtils.GlobalSettings.NotifySMTPHostPortionOnly;
            mailman.SmtpPort = GZTW.AyaNova.BLL.AyaBizUtils.GlobalSettings.NotifySMTPPort;
            //case 1136
            if (GZTW.AyaNova.BLL.AyaBizUtils.GlobalSettings.NotifySMTPUseSSL)
                mailman.SmtpSsl = true;
            if (GZTW.AyaNova.BLL.AyaBizUtils.GlobalSettings.NotifySMTPUseTLS)
                mailman.StartTLS = true;


            mailman.SmtpUsername = GZTW.AyaNova.BLL.AyaBizUtils.GlobalSettings.NotifySMTPAccount;
            mailman.SmtpPassword = GZTW.AyaNova.BLL.AyaBizUtils.GlobalSettings.NotifySMTPPassword;

            //case 1382
            //if can't use smtp server then log and conditionally abort
            //## NOTE: this operation sets up what tls level is being used etc
            if (!mailman.SmtpNoop())
            {
                //case 1608
                NotifyDeliveryLog.LogSMTPConnectFailure("Code:" + mailman.LastSmtpStatus.ToString() + "\r\n" + mailman.LastErrorText);

                //If retry then don't proceed or notifications will be deleted
                if (AyaBizUtils.GlobalSettings.SMTPRetry)
                    return;
            }

            //case 3808 prevent dupes in single delivery tranche
            //If this doesn't prevent it, it means it's duping in separate runs of this method
            // so would need an external static location to store a limited number of dupes in some kind of
            //queue, probably in ayabizutils with everything else
            System.Collections.Generic.List<string> Hashes = new System.Collections.Generic.List<string>();

            foreach (ClientNotificationList.ClientNotificationListInfo info in nl)
            {
                string NotifySummary = string.Empty;
                try
                {
                    //reload email from stored mime
                    ClientNotifyEvent n = ClientNotifyEvent.GetItem(info.mID);
                    string[] sMessageFields = n.GetContentAsString.Split('|');
                    int nFieldCount = sMessageFields.GetLength(0);
                    if (nFieldCount < 5 || sMessageFields[0] != "CLIENTNOTIFYEVENT")
                    {
                        NotifyDeliveryLog.LogClientDelivery(n.ClientID, false, "Invalid event data: " + n.GetContentAsString);
                        ClientNotifyEvent.DeleteItem(n.ID);
                        continue;
                    }


                    Chilkat.Email email = new Chilkat.Email();

                    //email.SetFromMimeText(n.GetContentAsString);
                    email.Mailer = AyaBizUtils.ReplaceBareLineFeeds("AyaNova service management software licensed to " + AyaBizUtils.REGTO);
                    email.Body = AyaBizUtils.ReplaceBareLineFeeds(sMessageFields[1]);//case 4180
                    email.Subject = AyaBizUtils.ReplaceBareLineFeeds(sMessageFields[2]);

                    //case 1601
                    string ToAddress = AyaBizUtils.ReplaceBareLineFeeds(sMessageFields[3]);

                    //case 3808
                   
                    NotifySummary = ToAddress + "|" + email.Subject;
                    if (nFieldCount > 4)
                    {
                        NotifySummary += "|woid:" + sMessageFields[4];//case 3829
                    }
                    if (nFieldCount > 5)
                    {
                        NotifySummary += "|woid:" + sMessageFields[5];
                    }

                    NotifyDeliveryLog.LogSMTPDeliveryMessage("Preparing to send client notification: " + NotifySummary);


                    if (ToAddress.Contains(";")) ToAddress = ToAddress.Replace(";", ",");

                    if (ToAddress.Contains(","))
                        email.AddMultipleTo(ToAddress);
                    else
                        email.AddTo("", ToAddress);

                    email.From = AyaBizUtils.ReplaceBareLineFeeds(sMessageFields[4]);

                    if (nFieldCount > 5)
                    {
                        string sWOID = sMessageFields[5];
                        if (!string.IsNullOrEmpty(sWOID))
                        {
                            NotifySummary += "|woid:" + sWOID;//case 3808

                            Guid woid = new Guid(sWOID);
                            //attach a workorder
                            Report r = Report.GetItem(new Guid(sMessageFields[6]));
                            object o = null;
                            if (r.ReportKey == "WorkorderServiceList")
                                o = WorkorderServiceList.GetListForSingleItem(woid);
                            else if (r.ReportKey == "WorkorderServiceDetailed")
                                o = WorkorderServiceDetailedReportData.GetItem(woid);
                            else if (r.ReportKey == "WorkorderQuoteList")
                                o = WorkorderQuoteList.GetListForSingleItem(woid);
                            else if (r.ReportKey == "WorkorderQuoteDetailed")
                                o = WorkorderQuoteDetailedReportData.GetItem(woid);

                            NotifySummary += "|reportkey:" + r.ReportKey + "|reportid:" + sMessageFields[6];//case 3808

                            //ms.toarray = byte array from memory stream

                            email.AddDataAttachment(DateTime.Now.ToString("yyyy_MM_dd_HH_mm") + ".pdf", ReportGenerator.GetReportAsPDF(r, o).ToArray());

                        }
                    }

                    //case 3808
                    var hash = CheckSum(email.Body + NotifySummary);

                    NotifySummary += "|hash:" + hash;

                    if (!Hashes.Contains(hash))
                    {
                        Hashes.Add(hash);
                    }
                    else
                    {
                        NotifyDeliveryLog.LogSMTPDeliveryMessage("Skipping duplicate: " + NotifySummary);
                        ClientNotifyEvent.DeleteItem(n.ID);
                        continue;
                    }

                    NotifyDeliveryLog.LogSMTPDeliveryMessage("Delivering: " + NotifySummary);
                    // Send mail.
                    bool success;
                    success = mailman.SendEmail(email);
#if(DEBUG)
                    NotifyDeliveryLog.LogSMTPDeliveryMessage("POST TLS version: " + mailman.TlsVersion);
#endif
                    if (success)
                    {
                        NotifyDeliveryLog.LogClientDelivery(n.ClientID, true, "");
                        ClientNotifyEvent.DeleteItem(n.ID);
                    }
                    else
                    {
                        NotifyDeliveryLog.LogClientDelivery(n.ClientID, false, mailman.LastErrorText);
                        //Added this late, I'm thinking if it fails they will get the log and 
                        //be able to fix the problem easily but if it stays in the queue there will be no way
                        //for them to delete it

                        //A better way would be to delete after x failed deliveries
                        ClientNotifyEvent.DeleteItem(n.ID);
                    }
                }
                catch (Exception ex)
                {
                    //case 3829

                    //crack exception if necessary
                    while (ex.InnerException != null) ex = ex.InnerException;
                    //log and then continue
                    if (string.IsNullOrEmpty(NotifySummary))
                    {
                        NotifySummary = "UNKNOWN MESSAGE";
                    }
                    NotifyDeliveryLog.LogSMTPDeliveryMessage("ClientNotify Exception during delivery:   Full error is:\r\n" + ex.Message + "\r\nMessage: " + NotifySummary);

                    continue;
                }

            }


        }

        public static string CheckSum(string input)
        {
            string hash = string.Empty;
            using (System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create())
            {
                hash = BitConverter.ToString(
                  md5.ComputeHash(System.Text.Encoding.UTF8.GetBytes(input))
                ).Replace("-", String.Empty);
            }
            return hash;
        }


        //=================================


    }
}