Imports DigitalData.Modules.Database
Imports DigitalData.Modules.Logging
Imports DigitalData.Modules.Base
Imports GdPicture14
Imports Quartz
Imports System.Security.Cryptography
Imports System.IO
Imports EnvelopeGenerator.Common.Jobs.FinalizeDocument.FinalizeDocumentExceptions
Imports EnvelopeGenerator.Common.Jobs.FinalizeDocument
Imports EnvelopeGenerator.Common.My.Resources
Imports EnvelopeGenerator.Common.Constants

Namespace Jobs
    Public Class FinalizeDocumentJob
        Implements IJob

        Private ReadOnly LicenseManager As New LicenseManager()
        Private GdViewer As GdViewer

        Private LogConfig As LogConfig
        Private Logger As Logger
        Private Database As MSSQLServer
        Private Config As DbConfig

        Private ConfigModel As ConfigModel
        Private EnvelopeModel As EnvelopeModel
        Private ReportModel As ReportModel

        Private ActionService As ActionService

        Private PDFBurner As PDFBurner
        Private PDFMerger As PDFMerger
        Private ReportCreator As ReportCreator

        Private ReadOnly CompleteWaitTimeInMinutes As Integer = 5

        Private Class EnvelopeData
            Public EnvelopeId As Integer
            Public DocumentPath As String
            Public AnnotationData As List(Of String)

        End Class

        Public Function Execute(pContext As IJobExecutionContext) As Task Implements IJob.Execute
            Dim oGdPictureKey As String = pContext.MergedJobDataMap.Item(Constants.GDPICTURE)
            LogConfig = pContext.MergedJobDataMap.Item(Constants.LOGCONFIG)
            Logger = LogConfig.GetLogger()

            Dim JobId = pContext.JobDetail.Key
            Logger.Info("Starting job {0}", JobId)

            Try
                Logger.Debug("Loading GdViewer..")
                GdViewer = New GdViewer()
                LicenseManager.RegisterKEY(oGdPictureKey)

                Logger.Debug("Loading Database..")
                Database = GetDatabase(pContext, LogConfig)

                Logger.Debug("Loading Models & Services")
                Dim oState = GetState()
                InitializeModels(oState)

                Logger.Debug("Loading Configuration..")
                Config = ConfigModel.LoadConfiguration()
                oState.DbConfig = Config

                InitializeServices(oState)

                Logger.Debug("Loading PDFBurner..")
                PDFBurner = New PDFBurner(LogConfig, oGdPictureKey)

                Logger.Debug("Loading PDFMerger..")
                PDFMerger = New PDFMerger(LogConfig, oGdPictureKey)

                Logger.Debug("Loading ReportCreator..")
                ReportCreator = New ReportCreator(LogConfig, oState)

                Logger.Debug("DocumentPath: [{0}]", Config.DocumentPath)
                If Config.DocumentPath_DMZ <> String.Empty Then
                    Logger.Debug("DMZ-DocPath configured: [{0}] - Overwrite Document-Path", Config.DocumentPath_DMZ)
                    Config.DocumentPath = Config.DocumentPath_DMZ
                End If
                Logger.Debug("ExportPath: [{0}]", Config.ExportPath)
                If Config.ExportPath_DMZ <> String.Empty Then
                    Logger.Debug("DMZ-ExportPath configured: [{0}] - Overwrite ExportPath", Config.ExportPath_DMZ)
                    Config.ExportPath = Config.ExportPath_DMZ
                End If
                Dim oCompleteStatus As Integer = Constants.EnvelopeStatus.EnvelopeCompletelySigned
                Dim oSql = $"SELECT * FROM TBSIG_ENVELOPE WHERE STATUS = {oCompleteStatus} AND DATEDIFF(minute, CHANGED_WHEN, GETDATE()) >= {CompleteWaitTimeInMinutes}"
                Dim oTable = Database.GetDatatable(oSql)

                Dim oEnvelopeIds As List(Of Integer) = oTable.Rows.Cast(Of DataRow).
                    Select(Function(r) r.Item("GUID")).
                    Cast(Of Integer).
                    ToList()

                Logger.Info("Found [{0}] completed envelopes.", oEnvelopeIds.Count)
                Dim oTotal As Integer = oEnvelopeIds.Count
                Dim oCurrent As Integer = 1

                For Each oId In oEnvelopeIds

                    Logger.Info("Finalizing Envelope [{0}] ({1}/{2})", oId, oCurrent, oTotal)

                    Logger.Debug("Loading Envelope..")
                    Dim oEnvelope = EnvelopeModel.GetById(oId)

                    If oEnvelope Is Nothing Then
                        Logger.Warn("Envelope could not be loaded for Id [{0}]!", oId)
                        Throw New ArgumentNullException("EnvelopeData")
                    End If

                    Logger.Debug("Loading Envelope Data..")
                    Dim oEnvelopeData = GetEnvelopeData(oId)

                    If oEnvelopeData Is Nothing Then
                        Logger.Warn("EnvelopeData could not be loaded for Id [{0}]!", oId)
                        Throw New ArgumentNullException("EnvelopeData")
                    End If

                    Logger.Debug("Burning Annotations to pdf")
                    Dim oBurnedDocument As Byte() = BurnAnnotationsToPdf(oEnvelopeData)
                    If oBurnedDocument Is Nothing Then
                        Logger.Warn("Document could not be finalized!")
                        Throw New ApplicationException("Document could not be finalized")
                    End If

                    If ActionService.CreateReport(oEnvelope) = False Then
                        Logger.Warn("Document Report could not be created!")
                        Throw New ApplicationException("Document Report could not be created")
                    End If

                    Logger.Debug("Creating report..")
                    Dim oReport As Byte() = ReportCreator.CreateReport(oEnvelope)
                    Logger.Debug("Report created.")

                    Logger.Debug("Merging documents..")
                    Dim oMergedDocument As Byte() = PDFMerger.MergeDocuments(oBurnedDocument, oReport)
                    Logger.Debug("Documents merged.")

                    Dim oOutputDirectoryPath = Config.ExportPath
                    Dim oOutputFilePath = Path.Combine(oOutputDirectoryPath, $"{oEnvelope.Uuid}.pdf")

                    Logger.Info("Writing finalized Pdf to disk..")
                    Logger.Info("Output path is [{0}]", oOutputFilePath)

                    Try
                        File.WriteAllBytes(oOutputFilePath, oMergedDocument)
                    Catch ex As Exception
                        Logger.Warn("Could not export final document to disk!")
                        Throw New ExportDocumentException("Could not export final document to disk!", ex)
                    End Try

                    Logger.Info("Sending final Emails..")

                    If SendFinalEmails(oEnvelope, oOutputFilePath) = False Then
                        Throw New ApplicationException("Final emails could not be sent!")
                    End If

                    Logger.Debug("Setting envelope status..")
                    If ActionService.FinalizeEnvelope(oEnvelope) = False Then
                        Logger.Warn("Envelope could not be finalized!")
                        Throw New ApplicationException("Envelope could not be finalized")
                    End If

                    oCurrent += 1
                    Logger.Info("Envelope finalized!")

                Next

                Logger.Info("Completed job {0} successfully!", JobId)
            Catch ex As MergeDocumentException
                Logger.Warn("Certificate Document job failed at step: Merging documents!")
                Logger.Error(ex)

            Catch ex As ExportDocumentException
                Logger.Warn("Certificate Document job failed at step: Exporting document!")
                Logger.Error(ex)

            Catch ex As Exception
                Logger.Warn("Certificate Document job failed!")
                Logger.Error(ex)
            Finally
                Logger.Info("Job execution for [{0}] ended", JobId)
            End Try

            Return Task.FromResult(True)
        End Function

        Private Function SendFinalEmails(pEnvelope As Envelope, pAttachment As String) As Boolean
            Dim oMailToCreator = pEnvelope.FinalEmailToCreator
            Dim oMailToReceivers = pEnvelope.FinalEmailToReceivers

            If oMailToCreator <> FinalEmailType.No Then
                Logger.Debug("Sending email to creator..")
                SendFinalEmailToCreator(pEnvelope, pAttachment)
            End If

            If oMailToReceivers <> FinalEmailType.No Then
                Logger.Debug("Sending emails to receivers..")
                If Config.SignedMail_Path <> String.Empty And Config.ExportPath_DMZ <> String.Empty Then
                    Logger.Debug("SignedMailPath configured: [{0}] - Replacing Attachment-Path", Config.SignedMail_Path)
                    Logger.Debug("Attachment-Path BEFORE replace: [{0}]", pAttachment)
                    pAttachment.Replace(Config.ExportPath, Config.SignedMail_Path)
                    Logger.Debug("Attachment-Path AFTER replace: [{0}]", pAttachment)
                End If

                SendFinalEmailToReceivers(pEnvelope, pAttachment)
            End If

            Return True
        End Function

        Private Function SendFinalEmailToCreator(pEnvelope As Envelope, pAttachment As String) As Boolean
            Dim oIncludeAttachment = SendFinalEmailWithAttachment(pEnvelope.FinalEmailToCreator)
            Dim oAttachment = String.Empty

            Logger.Debug("Attachment included: [{0}]", oIncludeAttachment)
            If oIncludeAttachment Then
                oAttachment = pAttachment
            End If

            If ActionService.CompleteEnvelope(pEnvelope, oAttachment) = False Then
                Logger.Error("Envelope could not be completed for receiver [{0}]", pEnvelope.User.Email)
                Return False
            End If

            Return True
        End Function

        Private Function SendFinalEmailToReceivers(pEnvelope As Envelope, pAttachment As String) As Boolean
            Dim oIncludeAttachment = SendFinalEmailWithAttachment(pEnvelope.FinalEmailToReceivers)
            Dim oAttachment = String.Empty

            Logger.Debug("Attachment included: [{0}]", oIncludeAttachment)
            If oIncludeAttachment Then

                oAttachment = pAttachment
            End If

            For Each oReceiver In pEnvelope.Receivers
                If ActionService.CompleteEnvelope(pEnvelope, oReceiver, oAttachment) = False Then
                    Logger.Error("Envelope could not be completed for receiver [{0}]", oReceiver.Email)
                    Return False
                End If
            Next

            Return True
        End Function

        Private Function SendFinalEmailWithAttachment(pType As FinalEmailType)
            If pType = FinalEmailType.YesWithAttachment Then
                Return True
            Else
                Return False
            End If
        End Function

        Private Function BurnAnnotationsToPdf(pData As EnvelopeData) As Byte()
            Dim pEnvelopeId = pData.EnvelopeId

            Logger.Info("Burning [{0}] signatures", pData.AnnotationData.Count)
            Dim oAnnotations = pData.AnnotationData
            Dim oInputPath = pData.DocumentPath
       
            Logger.Info("Input path: [{0}]", oInputPath)
            Dim oInputDocumentBuffer As Byte()
            Try
                oInputDocumentBuffer = File.ReadAllBytes(oInputPath)
            Catch ex As Exception
                Logger.Error(ex)
                Throw New BurnAnnotationException("Source document could not be read from disk!", ex)
            End Try

            Return PDFBurner.BurnInstantJSONAnnotationsToPDF(oInputDocumentBuffer, oAnnotations)
        End Function

        Private Function GetEnvelopeData(pEnvelopeId As Integer) As EnvelopeData
            Dim oSql = $"SELECT T.GUID, T2.FILEPATH FROM [dbo].[TBSIG_ENVELOPE] T
                JOIN TBSIG_ENVELOPE_DOCUMENT T2 ON T.GUID = T2.ENVELOPE_ID
                WHERE T.GUID = {pEnvelopeId}"
            Dim oTable As DataTable = Database.GetDatatable(oSql)
            Dim oRow As DataRow = oTable.Rows.Cast(Of DataRow).SingleOrDefault()
            If oRow Is Nothing Then
                Return Nothing
            End If

            Dim oAnnotationData = GetAnnotationData(pEnvelopeId)
            Dim oData As New EnvelopeData With {
                .EnvelopeId = pEnvelopeId,
                .DocumentPath = oRow.ItemEx("FILEPATH", ""),
                .AnnotationData = oAnnotationData
            }

            Logger.Debug("Document path: [{0}]", oData.DocumentPath)

            Return oData
        End Function

        Private Function GetAnnotationData(pEnvelopeId As Integer) As List(Of String)
            Dim oSql = $"SELECT VALUE FROM TBSIG_DOCUMENT_STATUS WHERE ENVELOPE_ID = {pEnvelopeId}"
            Dim oTable As DataTable = Database.GetDatatable(oSql)

            Return oTable.Rows.Cast(Of DataRow).
                Select(Function(r) r.ItemEx("VALUE", String.Empty)).
                Cast(Of String).
                ToList()

        End Function

        Private Sub InitializeServices(pState As State)
            ActionService = New ActionService(pState)
        End Sub

        Private Sub InitializeModels(pState As State)
            ConfigModel = New ConfigModel(pState)
            EnvelopeModel = New EnvelopeModel(pState)
            ReportModel = New ReportModel(pState)
        End Sub

        Private Function GetDatabase(pContext As IJobExecutionContext, pLogConfig As LogConfig) As MSSQLServer
            Dim oConnectionString As String = pContext.MergedJobDataMap.Item(Constants.DATABASE)
            Dim Database = New MSSQLServer(pLogConfig, MSSQLServer.DecryptConnectionString(oConnectionString))

            Return Database
        End Function

        Private Function GetState() As State
            Return New State With {
                .LogConfig = LogConfig,
                .Database = Database,
                .UserId = 0,
                .Config = Nothing,
                .DbConfig = Nothing
            }
        End Function
    End Class
End Namespace