Imports System.IO
Imports System.Globalization
Imports System.ComponentModel

Public Class ClassHelper
    Private Shared BW_DocPath As String
    Private Shared BW_DocID As Integer
    Private Shared BW_ParentID As Integer
    Private Shared BW_Filename As String
    Public Shared Function FORMAT_WM_PATH(WMpath As String) As String
        Try
            If IsNothing(WMpath) Then
                Return Nothing
            End If

            If WMpath.StartsWith("W:") Then
                WMpath = WMpath.Replace("W:", WMPATH_PREFIX)
            ElseIf WMpath.StartsWith("\") AndAlso Not WMpath.StartsWith(WMPATH_PREFIX) Then
                WMpath = WMPATH_PREFIX & WMpath
            End If

            LOGGER.Debug("WMpath is: " & WMpath)
            Return WMpath
        Catch ex As Exception
            Return WMpath
        End Try
    End Function
    Public Shared Function GetRelPath(WMpath As String) As String
        Try
            If WMpath.StartsWith("W:") Then
                WMpath = WMpath.Replace("W:", "")
            ElseIf WMpath.StartsWith(WMPATH_PREFIX) Then
                WMpath = WMpath.Replace(WMPATH_PREFIX, "")
            End If

            LOGGER.Debug("WMpath is: " & WMpath)
            Return WMpath
        Catch ex As Exception
            Return WMpath
        End Try
    End Function
    Public Shared Function Format_Currency(value As String, language As String)
        Try
            If IsNothing(value) Then
                Return ""
            End If

            If language <> "de-DE" Then
                value = value.Replace(",", ".")
            End If

            Dim dValue = Double.Parse(value)

            Dim ci = Threading.Thread.CurrentThread.CurrentCulture
            Dim nfi As NumberFormatInfo = ci.NumberFormat.Clone()
            nfi.CurrencySymbol = "" ' KEIN Currency Symbol

            Return dValue.ToString("C", nfi)
        Catch ex As Exception
            Return value.ToString()
        End Try
    End Function

    Public Shared Function Convert_Date(input As String, format As String)
        Try
            Dim dt As Date = CDate(input)
            Dim result = dt.ToString(format, CultureInfo.InvariantCulture)
            Return result
        Catch ex As Exception
            LOGGER.Warn("Unexpected Error while converting value '" & input & "' to date....." & ex.Message)
            Return input
        End Try

    End Function
    Public Shared Function CheckDBNull(input As Object, back_Value As String)
        If IsDBNull(input) Then
            If back_Value = "String" Then
                Return ""
            Else
                Return True
            End If
        Else
            If back_Value = "String" Then
                Return input.ToString
            Else
                Return False
            End If
        End If
    End Function
    Public Shared Function Convert_to_Database_Date(input As String)
        Try
            Dim dt As Date = CDate(input)
            Dim result = dt.ToString("yyyy-MM-dd", Nothing)
            Return result
        Catch ex As Exception
            LOGGER.Warn("Unexpected Error while converting value '" & input & "' to date(Convert_to_Database_Date)....." & ex.Message)
            Return input
        End Try

    End Function
    Public Shared Function Get_TempFilename()
        'Eine tempfile generieren
        Dim tempFilename = My.Computer.FileSystem.GetTempFileName()
        'Nur den Filenamen ohne Erweiterung
        Dim tempName = Path.GetDirectoryName(tempFilename) & "\" & Path.GetFileNameWithoutExtension(tempFilename)
        'tempfile lsöchen
        If My.Computer.FileSystem.FileExists(tempFilename) Then
            My.Computer.FileSystem.DeleteFile(tempFilename)
        End If
        Return tempName
    End Function
    Public Shared Function Versionierung_Datei(pDateiname As String) As String
        Try
            pDateiname = FORMAT_WM_PATH(pDateiname)
            Dim dir As String = Path.GetDirectoryName(pDateiname)
            Dim baseName As String = Path.GetFileNameWithoutExtension(pDateiname)
            Dim ext As String = Path.GetExtension(pDateiname)
            Dim stammname As String = Path.Combine(dir, baseName)

            If Not File.Exists(pDateiname) Then
                Return ""
            End If

            Dim version As Integer = 2
            Dim candidate As String
            Do
                candidate = stammname & "~" & version & ext
                version += 1
            Loop While File.Exists(candidate)

            Return candidate
        Catch ex As Exception
            LOGGER.Warn(" - Error in versioning file - error: " & vbCrLf & ex.Message)
            MsgBox(ex.Message, MsgBoxStyle.Critical, "Error in versioning file:")
            Return ""
        End Try
    End Function
    Public Shared Function CleanFilename(ByVal sFilename As String,
      Optional ByVal REPLACEChar As String = "") As String

        ' alle nicht zulässigen Zeichen ersetzen
        Return System.Text.RegularExpressions.Regex.Replace(
          sFilename, "[?*^""<>|]", REPLACEChar)
    End Function
    Public Shared Function File_open(RESULT_DOC_PATH As Object, DocID As String, pParentID As Integer)
        Try
            Dim oFileName = Path.GetFileName(RESULT_DOC_PATH)
            BW_Filename = oFileName
            RESULT_DOC_PATH = FORMAT_WM_PATH(RESULT_DOC_PATH)
            If pParentID = 0 Then
                Dim sql = String.Format("SELECT dwParentID FROM TBPMO_DOCRESULT_LIST WHERE DocID = {0}", DocID)
                pParentID = MYDB_ECM.GetScalarValue(sql)
            End If
            If SHARE_DRIVE_ACTIVE Then
                If RESULT_DOC_PATH.ToString.StartsWith(constWMOBJECTS) Then
                    RESULT_DOC_PATH = RESULT_DOC_PATH.ToString.Replace(constWMOBJECTS, WMPATH_PREFIX)
                End If


            End If
            CURRENT_OFFICE_FILE_CHANGED = False
            If RESULT_DOC_PATH <> Nothing Then
                'Dim EXT = Path.GetExtension(RESULT_DOC_PATH)
                'EXT = EXT.Replace(".", "")
                '    Dim sql = String.Format("SELECT VIEWER FROM TBPMO_DOC_USER_VIEW WHERE USER_ID = {0} AND FILE_EXTENSION = '{1}'", USER_GUID, EXT)
                '    Dim DT As DataTable = MYDB_ECM.GetDatatable(sql)
                '    If DT.Rows.Count = 1 Then
                '        Select Case DT.Rows(0).Item("VIEWER")
                '            Case "DOC_VIEW"
                '                OPEN_DOCVIEW(RESULT_DOC_PATH, DocID)
                '        End Select
                '    Else
                File_SYSOPEN(RESULT_DOC_PATH, DocID, pParentID)
                'End If
                Return True
            Else
                MSGBOX_Handler("ERROR", "", "Sorry, but the docpath for doc-id: " & DocID & " is nothing!")
                LOGGER.Debug("RESULT_DOC_PATH IS NOTHING")
                Return False

            End If
        Catch ex As Exception
            MsgBox("Unexpected Error in File_open:" & vbCrLf & ex.Message & vbCrLf & RESULT_DOC_PATH & vbCrLf & "DocID: " & DocID, MsgBoxStyle.Critical)
            LOGGER.Warn("Error in File_open: " & ex.Message & vbCrLf & " - Path: " & RESULT_DOC_PATH & " - DocID: " & DocID)
            Return False
        End Try
    End Function
    Public Shared Sub Open_Folder(RESULT_DOC_PATH As Object, DocID As String)
        Try
            If RESULT_DOC_PATH <> Nothing Then
                RESULT_DOC_PATH = FORMAT_WM_PATH(RESULT_DOC_PATH)
                Dim _path = Path.GetDirectoryName(RESULT_DOC_PATH)
                FOLDER_OPEN(_path, DocID)
            Else
                LOGGER.Debug("RESULT_DOC_PATH IS NOTHING")
            End If
        Catch ex As Exception
            MsgBox("Unexpected Error in Open_Folder:" & vbCrLf & ex.Message & vbCrLf & RESULT_DOC_PATH & vbCrLf & "DocID: " & DocID, MsgBoxStyle.Critical)
            LOGGER.Warn("Error in Open_Folder: " & ex.Message & vbCrLf & " - Path: " & RESULT_DOC_PATH & " - DocID: " & DocID)
        End Try
    End Sub
    Private Shared Sub File_SYSOPEN(RESULT_DOC_PATH As Object, DocID As String, pParentID As Integer)
        Try
            If RESULT_DOC_PATH <> Nothing Then

                BW_DocPath = RESULT_DOC_PATH
                BW_DocID = DocID
                BW_ParentID = pParentID

                Dim BWFileHandler As New BackgroundWorker
                AddHandler BWFileHandler.DoWork, AddressOf BWFileHandler_DoWork
                BWFileHandler.RunWorkerAsync()
            Else
                LOGGER.Warn("File_SYSOPEN RESULT_DOC_PATH is nothing")
            End If
        Catch ex As Exception
            MsgBox("Unexpected Error in File_SYSOPEN:" & vbCrLf & ex.Message & vbCrLf & RESULT_DOC_PATH & vbCrLf & "DocID: " & DocID, MsgBoxStyle.Critical)
            LOGGER.Warn("Error in File_SYSOPEN: " & ex.Message & vbCrLf & " - Path: " & RESULT_DOC_PATH & " - DocID: " & DocID)
        End Try

    End Sub
    Private Shared Sub BWFileHandler_DoWork()
        Try
            Dim oOverrideRunPath As String = ""
            Dim oExtension As String = Path.GetExtension(BW_DocPath).ToLower()

            ' Prüfen, ob eine spezielle Anwendung für die Dateierweiterung definiert ist
            For Each oROW As DataRow In CURRENT_TBFILE_EXTENSION_OVERRIDE.Rows
                If oExtension.Replace(".", "") = oROW.Item("FILE_EXTENSION").ToString().ToLower() Then
                    LOGGER.Debug($"Specific file extension override for [{oExtension}] found.")
                    oOverrideRunPath = oROW.Item("PROCESS").ToString()
                    Exit For
                End If
            Next

            Dim oMyProcess As Process = Nothing
            Dim oSql As String = ""

            Try
                ' ###### Startinfo vorbereiten ######
                Dim startInfo As New ProcessStartInfo()

                If oOverrideRunPath <> "" Then
                    startInfo.FileName = oOverrideRunPath
                    startInfo.Arguments = $"""{BW_DocPath}"""
                    LOGGER.Debug($"Opening document [{BW_DocPath}] using override application [{oOverrideRunPath}].")
                Else
                    startInfo.FileName = BW_DocPath
                    LOGGER.Debug($"Opening document [{BW_DocPath}] with system default application.")
                End If

                startInfo.UseShellExecute = True
                startInfo.RedirectStandardOutput = False
                If oOverrideRunPath <> "" Then
                    oMyProcess = Process.Start(startInfo)
                Else
                    oMyProcess = Process.Start(BW_DocPath)
                End If
                ' ###### Prozess starten ######

                ' Prozess kann Nothing sein, wenn eine bestehende Anwendung (z. B. Outlook)
                ' die Datei übernimmt, ohne einen neuen Prozess zu erstellen.
                If oMyProcess IsNot Nothing Then
                    Dim ProcID As Integer = oMyProcess.Id
                    LOGGER.Debug($"Started process ID {ProcID} for document [{BW_DocPath}].")

                    oMyProcess.WaitForExit()

                    oExtension = Path.GetExtension(BW_DocPath).ToLower()
                    LOGGER.Debug($"Checking if file extension [{oExtension}] may change during edit...")

                    If FILE_FORMATS_CHANGE_DURING_EDIT.Contains(oExtension) And oOverrideRunPath = "" Then
                        LOGGER.Debug("Create possible Document change in TBPMO_DOC_ID_CHANGED.")
                        Dim oInsert = $"INSERT INTO TBPMO_DOC_ID_CHANGED (USER_ID,PROCESS_ID,VERSION_ID,OLD_DOC_ID,NEW_DOC_ID,DOC_PATH) VALUES (" &
                      $"{USER_GUID},'{ProcID}',9999,{BW_DocID},0,'{BW_DocPath}')"
                        MYDB_ECM.ExecuteNonQuery(oInsert)
                    End If
                Else
                    ' Kein neuer Prozess gestartet – Datei wurde von bestehender Anwendung übernommen
                    LOGGER.Debug($"No new process created for [{BW_DocPath}]. File likely handled by existing application (e.g. Outlook).")
                End If

            Catch ex As Exception
                ' Fehler im Prozessstart oder während des Wartens
                LOGGER.Warn("Error in Process.Start(): " & ex.Message & vbCrLf & " - Path: " & BW_DocPath & " - DocID: " & BW_DocID)
                MsgBox("Error in OpenFile: " & ex.Message & vbCrLf &
                   "Path: " & BW_DocPath & vbCrLf & "DocID: " & BW_DocID,
                   MsgBoxStyle.Exclamation, "Open File Error")
            End Try

        Catch ex As Exception
            ' Fehler im gesamten Worker (z. B. Path nicht vorhanden)
            LOGGER.Warn("General error in BWFileHandler_DoWork: " & ex.Message & vbCrLf &
                    " - Path: " & BW_DocPath & " - DocID: " & BW_DocID)

            ' Letzter Versuch: Öffne mit Standardprogramm
            Try
                Process.Start(BW_DocPath)
                LOGGER.Debug("Fallback: Document opened with default application.")
            Catch ex1 As Exception
                LOGGER.Warn("Fallback error in Process.Start(): " & ex1.Message & vbCrLf &
                        " - Path: " & BW_DocPath & " - DocID: " & BW_DocID)
            End Try
        End Try
    End Sub

    Private Shared Sub FOLDER_OPEN(PATH As Object, DocID As String)
        Try
            If PATH <> Nothing Then
                LOGGER.Debug("in FOLDER_OPEN(" & PATH & ")")
                If System.IO.Directory.Exists(PATH) = True Then
                    Process.Start(PATH)
                Else
                    MsgBox("Folder '" & PATH & "' not existing or accessible!", MsgBoxStyle.Exclamation)
                End If
            End If
        Catch ex As Exception
            MsgBox("Unexpected Error in FOLDER_OPEN:" & vbCrLf & ex.Message & vbCrLf & PATH & vbCrLf & "DocID: " & DocID, MsgBoxStyle.Critical)
            LOGGER.Warn("Error in FOLDER_OPEN: " & ex.Message & vbCrLf & " - Path: " & PATH & " - DocID: " & DocID)
        End Try

    End Sub
    Public Shared Function InsertEssential_Log(REFERENCE_KEY As Integer, REFERENCE_STRING As String, COMMENT As String)
        Try
            COMMENT = COMMENT.Replace("'", "")
            Dim insert = String.Format("INSERT INTO TBPMO_LOG_ESSENTIALS (REFERENCE_KEY,REFERENCE_STRING,COMMENT,ADDED_WHO) VALUES ({0},'{1}','{2}','{3}')", REFERENCE_KEY, REFERENCE_STRING, COMMENT, USER_USERNAME)

            Dim result = MYDB_ECM.ExecuteNonQuery(insert)
            Return result
        Catch ex As Exception
            LOGGER.Warn("Unexpected Error in InsertEssential_Log: " & ex.Message)
            Return False
        End Try
    End Function
    Public Shared Function DeleteRecord(SELECTED_RECORD_ID As Integer, Optional Comment As String = "")
        Try
            Dim DeleteRecordSQL = String.Format("EXEC [dbo].[PRPMO_DELETE_RECORD] {0}, '{1}','{2}'", SELECTED_RECORD_ID, USER_USERNAME, Comment)
            Dim result As Boolean = MYDB_ECM.ExecuteNonQuery(DeleteRecordSQL)
            If result = False Then
                Dim msg = "Der Datensatz '" & SELECTED_RECORD_ID & "' konnte nicht gelöscht werden. Überprüfen Sie das log"
                If USER_LANGUAGE <> "de-DE" Then
                    msg = "The record '" & SELECTED_RECORD_ID & "' could not be deleted. Check the log"
                End If
                MsgBox(msg, MsgBoxStyle.Exclamation)

            End If
            LOGGER.Info($"Deleted Record [{SELECTED_RECORD_ID}] Result was [{result}]: ")
            Return result
        Catch ex As Exception
            LOGGER.Warn("Unexpected Error in DeleteRecord: " & ex.Message)
            Return False
        End Try
    End Function
    Public Shared Sub MSGBOX_Handler(type As String, Caption As String, info1 As String, Optional info2 As String = "")
        Dim msg = info1
        If info2 <> "" Then
            msg &= vbCrLf & vbCrLf & info2
        End If
        If type = "ERROR" Then
            MessageBox.Show(msg, Caption, MessageBoxButtons.OK, MessageBoxIcon.Error)
            LOGGER.Warn(msg)
        ElseIf type = "INFO" Then
            MessageBox.Show(msg, Caption, MessageBoxButtons.OK, MessageBoxIcon.Information)
        End If
    End Sub
    Public Shared Function Check_Record_Read_only(RECORD_ID As Integer, ENTITY_ID As Integer)
        Dim sql = ""
        Try
            sql = SQL_RECORD_AND_FILE_READ_ONLY
            sql = sql.Replace("@RECORDID", RECORD_ID)
            sql = sql.Replace("@RECORD_ID", RECORD_ID)
            sql = sql.Replace("@USER_ID", USER_GUID)
            sql = sql.Replace("@USER_GUID", USER_GUID)
            sql = sql.Replace("@ENTITY_ID", ENTITY_ID)
            sql = sql.Replace("@USERNAME", USER_USERNAME)
            sql = sql.Replace("@USER_NAME", USER_USERNAME)
            LOGGER.Debug("RIGHT_ONLY_READ_RECORD_DOC SQL: (When true then disable) '" & sql & "'")
            Return CBool(MYDB_ECM.GetScalarValue(sql))
        Catch ex As Exception
            LOGGER.Warn("SQL_RIGHT_READ_AND_VIEW_ONLY: " & sql)
            Return False
        End Try
    End Function
    Public Shared Function Check_File_Read_only(RECORD_ID As Integer, ENTITY_ID As Integer)
        Dim sql = ""
        Try

            sql = SQL_DOC_READ_ONLY
            sql = sql.Replace("@RECORDID", RECORD_ID)
            sql = sql.Replace("@RECORD_ID", RECORD_ID)
            sql = sql.Replace("@USER_ID", USER_GUID)
            sql = sql.Replace("@USER_GUID", USER_GUID)
            sql = sql.Replace("@ENTITY_ID", ENTITY_ID)
            sql = sql.Replace("@USERNAME", USER_USERNAME)
            sql = sql.Replace("@USER_NAME", USER_USERNAME)
            LOGGER.Debug("RIGHT_ONLY_READ_COC SQL: (When true then disable) '" & sql & "'")
            Return CBool(MYDB_ECM.GetScalarValue(sql))
        Catch ex As Exception
            LOGGER.Warn("RIGHT_WINDREAM_FORBIDDEN: " & sql)
            Return False
        End Try
    End Function
    Public Shared Sub REMOVE_OLD_DROP_FILES()
        Try
            ' ✅ NEU: Pre-Check - welche Dateien sind betroffen?
            Dim preCheckSQL = $"SELECT GUID, FILENAME_ONLY, ADDED_WHEN, DATEDIFF(MINUTE, ADDED_WHEN, GETDATE()) AS AGE_MINUTES " &
                          $"FROM TBPMO_FILES_USER " &
                          $"WHERE ADDED_WHEN < DATEADD(MINUTE, -15, GETDATE()) " &
                          $"AND WORKED = 0 AND USER_WORK = '{USER_USERNAME}'"

            Dim preCheckDT = MYDB_ECM.GetDatatable(preCheckSQL)

            If preCheckDT IsNot Nothing AndAlso preCheckDT.Rows.Count > 0 Then
                LOGGER.Warn($"REMOVE_OLD_DROP_FILES: {preCheckDT.Rows.Count} Dateien werden als TIMEOUT markiert:")
                For Each row As DataRow In preCheckDT.Rows
                    LOGGER.Warn($"  - GUID={row("GUID")}, Datei={row("FILENAME_ONLY")}, Alter={row("AGE_MINUTES")} Minuten")
                Next
            Else
                LOGGER.Debug($"REMOVE_OLD_DROP_FILES: Keine Dateien älter als 15 Minuten (User: {USER_USERNAME})")
            End If

            ' ✅ Dann UPDATE
            Dim oDEL = String.Format("UPDATE [DD_ECM].[dbo].[TBPMO_FILES_USER] 
                SET [USER_WORK] = [USER_WORK] + '_TIMEOUT',
                    WORKED = 1  
                WHERE ADDED_WHEN < DATEADD(MINUTE, -15, GETDATE())
                  AND WORKED = 0 AND USER_WORK = '{0}'  ;", USER_USERNAME)

            Dim rowsAffected = MYDB_ECM.ExecuteNonQuery(oDEL)

            If rowsAffected > 0 Then
                LOGGER.Warn($"REMOVE_OLD_DROP_FILES: {rowsAffected} Dateien wurden als TIMEOUT markiert")
            End If
        Catch ex As Exception
            MsgBox(ex.Message, MsgBoxStyle.Critical, "Unexpected error while REMOVE_OLD_DROP_FILES")
        End Try
    End Sub
    Public Shared Sub Create_USER_FILE_TABLE()
        Try
            Dim sql = String.Format("SELECT *, CONVERT(BIT,0) AS DELETE_FILE FROM TBPMO_FILES_USER WHERE (USER_WORK = '{0}') AND WORKED = 0", USER_USERNAME)
            CURRENT_TBPMO_FILES_USER = MYDB_ECM.GetDatatable(sql)
            ' ✅ NEU: Logging
            If CURRENT_TBPMO_FILES_USER Is Nothing Then
                LOGGER.Warn($"Create_USER_FILE_TABLE: GetDatatable gab Nothing zurück (User: {USER_USERNAME})")
            Else
                LOGGER.Debug($"Create_USER_FILE_TABLE: {CURRENT_TBPMO_FILES_USER.Rows.Count} Dateien geladen (User: {USER_USERNAME})")

                ' ✅ DEBUG: Zeige GUIDs der geladenen Dateien
                For Each row As DataRow In CURRENT_TBPMO_FILES_USER.Rows
                    LOGGER.Debug($"  - GUID={row("GUID")}, WORKED={row("WORKED")}, Datei={row("FILENAME2WORK")}")
                Next
            End If
        Catch ex As Exception
            LOGGER.Error($"Create_USER_FILE_TABLE Exception: {ex.Message}")
            MsgBox(ex.Message, MsgBoxStyle.Critical, "Unexpected error while creating User_File_Table")
        End Try
    End Sub
    Public Shared Function DELETE_PMO_FILE_USER(GUID As Integer)
        Try
            Dim del As String = String.Format("DELETE FROM TBPMO_FILES_USER WHERE GUID = {0}", GUID)
            Return MYDB_ECM.ExecuteNonQuery(del)
        Catch ex As Exception
            MsgBox("Unexpected Error in DELETE_PMO_FILE_USER: " & ex.Message, MsgBoxStyle.Critical)
            Return False
        End Try
    End Function
    Public Shared Function DELETE_PMO_FILE_USER_OPEN_FILES()
        Try
            Dim del As String = String.Format("DELETE FROM TBPMO_FILES_USER WHERE (USER_WORK = '{0}') AND WORKED = 0", USER_USERNAME)
            Return MYDB_ECM.ExecuteNonQuery(del)
        Catch ex As Exception
            MsgBox("Unexpected Error in DELETE_PMO_FILE_USER_OPEN_FILES: " & ex.Message, MsgBoxStyle.Critical)
            Return False
        End Try
    End Function
    Public Shared Function DecryptString(ciphertext As String, MethodName As String)
        Dim result As String
        Dim wrapper As New ClassEncryption("!35452didalog=")
        ' DecryptData throws if the wrong password is used.
        Try
            result = wrapper.DecryptData(ciphertext)
            Return result
        Catch ex As Exception
            LOGGER.Warn("The ciphertext for Method'" & MethodName & "' could not be decrypted")
            Return ""
        End Try
    End Function
    Public Shared Function FILTER_DATATABLE(BaseDatatable As DataTable, expression As String, sortstring As String)
        Try
            'Schema übernehmen
            Dim filteredData As DataTable = BaseDatatable.Clone()
            'Einfügevariante
            BaseDatatable.Select(expression, sortstring).CopyToDataTable(filteredData, LoadOption.PreserveChanges)
            'Dim filteredData = BaseDatatable.Select(expression).CopyToDataTable()
            Return filteredData
        Catch ex As Exception
            LOGGER.Warn("unexpected error in FILTER_DATATABLE: " & ex.Message)
            Return Nothing
        End Try

    End Function
    Public Shared Function GetDocrecordLinks(pRECORDID As Integer)
        Try
            Dim oSQL = $"SELECT * FROM TBPMO_DOC_RECORD_LINK WHERE RECORD_ID = {pRECORDID}"
            CURRENT_DT_TBPMO_DOC_RECORD_LINK = MYDB_ECM.GetDatatable(oSQL)
        Catch ex As Exception
            LOGGER.Warn("Unexpected Error in GetDocrecordLinks: " & ex.Message)
            Return False
        End Try
    End Function
    Public Shared Function Insert_USER_File(pFilename As String, handleType As String)
        Try
            Dim oImport_filename_only As String = Path.GetFileName(pFilename)
            Dim CURRENT_FILE_HASH = ""

            If File.Exists(pFilename) Then
                Dim oFileInfo As New FileInfo(pFilename)
                LOGGER.Debug($"File exists: [{pFilename}] | Size: {oFileInfo.Length} bytes | Extension: {oFileInfo.Extension}")

                If (pFilename.ToUpper.EndsWith(".MSG") Or pFilename.ToUpper.EndsWith(".EML")) And (handleType = "|OUTLOOK_MESSAGE|" Or handleType = "|MSGONLY|") Then
                    CURRENT_FILE_HASH = FILESYSTEM.GetChecksumFromString(pFilename)
                    LOGGER.Debug($"Hash method: GetChecksumFromString | Hash: [{CURRENT_FILE_HASH}]")
                Else
                    CURRENT_FILE_HASH = FILESYSTEM.GetChecksum(pFilename)
                    LOGGER.Debug($"Hash method: GetChecksum | Hash: [{CURRENT_FILE_HASH}]")
                End If
            Else
                LOGGER.Warn($"File does not exist: [{pFilename}] - Cannot compute hash.")
            End If

            Dim oSQL = $"SELECT Filename, ADDED_WHO, FORMAT(ADDED_WHEN, 'dd-MM-yyyy HH:mm') AS ADDED_WHEN_STRING FROM TBPMO_DOCRESULT_LIST WHERE FILE_HASH = '{CURRENT_FILE_HASH}' ORDER BY ADDED_WHEN DESC"
            LOGGER.Debug($"Inserting File - hash is [{CURRENT_FILE_HASH}]")
            Dim oDTCHECK As DataTable = MYDB_ECM.GetDatatable(oSQL)

            If Not IsNothing(oDTCHECK) Then
                If oDTCHECK.Rows.Count >= 1 Then
                    LOGGER.Info($"We got a file with the same hash [{CURRENT_FILE_HASH}]")
                    Dim oFilename = oDTCHECK.Rows(0).Item(0)
                    Dim oUSER = oDTCHECK.Rows(0).Item(1)
                    Dim oADDED_WHEN = oDTCHECK.Rows(0).Item(2)
                    Dim oMSG As String

                    If USER_LANGUAGE <> "de-DE" Then
                        oMSG = $"This file [{oImport_filename_only}] has already been imported into orgFLOW!" & vbCrLf &
                           $"File already imported: [{oFilename}]" & vbCrLf &
                           $"Imported on: {oADDED_WHEN}" & vbCrLf &
                           $"Imported by: {oUSER}" & vbCrLf &
                           $"Total imports with identical content: {oDTCHECK.Rows.Count}" & vbCrLf & vbCrLf &
                           "Do you want to import this file again?" & vbCrLf &
                           "NO  → The complete import will be cancelled."
                    Else
                        oMSG = $"Diese Datei [{oImport_filename_only}] wurde bereits in orgFLOW importiert!" & vbCrLf &
                           $"Bereits vorhandene Datei: [{oFilename}]" & vbCrLf &
                           $"Importiert am: {oADDED_WHEN}" & vbCrLf &
                           $"Importiert von: {oUSER}" & vbCrLf &
                           $"Anzahl Importe mit identischem Inhalt: {oDTCHECK.Rows.Count}" & vbCrLf & vbCrLf &
                           "Möchten Sie die Datei dennoch erneut importieren?" & vbCrLf &
                           "NEIN → Der gesamte Import (alle folgenden) wird abgebrochen."
                    End If

                    Dim result As MsgBoxResult
                    result = MessageBox.Show(oMSG, CAPTION_CONFIRMATION, MessageBoxButtons.YesNo, MessageBoxIcon.Question)

                    If result = MsgBoxResult.No Then
                        LOGGER.Info($"User wählte NEIN bei Hash-Duplikat-Check für [{oImport_filename_only}] - Import abgebrochen")
                        Return False
                    Else
                        LOGGER.Info($"User wählte JA bei Hash-Duplikat-Check für [{oImport_filename_only}] - fahre fort")
                    End If
                End If
            End If

            ' ✅ NEU: Pre-Check - gibt es bereits einen Eintrag mit diesem Hash?
            Dim preCheckSQL = $"SELECT GUID, USER_WORK, WORKED FROM TBPMO_FILES_USER WHERE FILE_HASH = '{CURRENT_FILE_HASH}' AND USER_WORK = '{USER_USERNAME}'"
            Dim preCheckDT = MYDB_ECM.GetDatatable(preCheckSQL)

            If preCheckDT IsNot Nothing AndAlso preCheckDT.Rows.Count > 0 Then
                LOGGER.Warn($"WARNUNG: Datei mit Hash [{CURRENT_FILE_HASH}] bereits in TBPMO_FILES_USER vorhanden:")
                For Each row As DataRow In preCheckDT.Rows
                    LOGGER.Warn($"  - GUID={row("GUID")}, USER_WORK={row("USER_WORK")}, WORKED={row("WORKED")}")
                Next
            End If

            ' ✅ INSERT mit explizitem Logging
            Dim ins As String = String.Format("INSERT INTO TBPMO_FILES_USER (FILENAME2WORK, USER_WORK, HANDLE_TYPE, FILENAME_ONLY, FILE_HASH) VALUES ('{0}','{1}','{2}','{3}','{4}')", pFilename, USER_USERNAME, handleType, oImport_filename_only, CURRENT_FILE_HASH)

            LOGGER.Debug($"Führe INSERT aus: [{ins}]")
            Dim insertResult = MYDB_ECM.ExecuteNonQuery(ins)

            If insertResult Then
                ' ✅ VERIFY - wurde wirklich eingefügt?
                Dim verifySQL = $"SELECT TOP 1 GUID, ADDED_WHEN FROM TBPMO_FILES_USER WHERE FILE_HASH = '{CURRENT_FILE_HASH}' AND USER_WORK = '{USER_USERNAME}' ORDER BY GUID DESC"
                Dim verifyDT = MYDB_ECM.GetDatatable(verifySQL)

                If verifyDT IsNot Nothing AndAlso verifyDT.Rows.Count > 0 Then
                    Dim insertedGUID = verifyDT.Rows(0)("GUID")
                    Dim insertedADDED_WHEN = verifyDT.Rows(0)("ADDED_WHEN")
                    LOGGER.Info($"INSERT ERFOLGREICH: GUID={insertedGUID}, ADDED_WHEN={insertedADDED_WHEN}, Datei=[{oImport_filename_only}]")
                Else
                    LOGGER.Error($"INSERT fehlgeschlagen (VERIFY)! Datei=[{oImport_filename_only}], Hash=[{CURRENT_FILE_HASH}]")
                End If
            Else
                LOGGER.Error($"INSERT fehlgeschlagen (ExecuteNonQuery)! Datei=[{oImport_filename_only}]")
            End If

            Return insertResult

        Catch ex As Exception
            LOGGER.Error($"Insert_USER_File Exception: {ex.Message}")
            MsgBox("Unexpected Error in Insert file for user (TBPMO_FILES_USER): " & ex.Message, MsgBoxStyle.Critical)
            Return False
        End Try
    End Function
End Class