Imports System.Diagnostics
Imports System.IO
Imports System.ServiceModel
Imports System.ServiceModel.Description
Imports System.Threading
Imports DigitalData.Modules.Database
Imports DigitalData.Modules.EDMI
Imports DigitalData.Modules.EDMI.API.Rights
Imports DigitalData.Modules.Logging
Imports DigitalData.Services.EDMIService.Exceptions
Imports DigitalData.Services.EDMIService.Messages
Imports DigitalData.Services.EDMIService.Methods
Imports DigitalData.Services.EDMIService.Methods.Database
Imports DigitalData.Services.EDMIService.Methods.IDB


<ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerSession,
                 ConcurrencyMode:=ConcurrencyMode.Multiple)>
Public Class EDMIService
    Implements IEDMIService

    Public Shared LogConfig As LogConfig
    Public Shared MSSQL_ECM As MSSQLServer
    Public Shared MSSQL_IDB As MSSQLServer
    Public Shared Firebird As Firebird
    Public Shared AppConfig As Config
    Public Shared GlobalState As GlobalState
    Public Shared Scheduler As Scheduler

    Public Const TBIDB_DOC_INFO = "TBIDB_DOC_INFO"
    Public Const TBIDB_ACCESSRIGHT = "TBIDB_ACCESSRIGHT"
    ' ── Aktive Sessions: SessionId → Username (thread-safe) ──────────────────
    Private Shared ReadOnly _ActiveSessions As New Collections.Concurrent.ConcurrentDictionary(Of String, String)

    Public Shared ReadOnly Property ActiveSessions As Integer
        Get
            Return _ActiveSessions.Count
        End Get
    End Property

    Public Shared ReadOnly Property ActiveSessionUsers As IReadOnlyCollection(Of String)
        Get
            Return _ActiveSessions.Values.Distinct().OrderBy(Function(u) u).ToList().AsReadOnly()
        End Get
    End Property
    ' ─────────────────────────────────────────────────────────────────────────

    Private ReadOnly _Logger As Logger
    Private ReadOnly _Debug As Boolean = False
    Private ReadOnly _Username As String
    Private ReadOnly _IDBHelpers As IDB.Helpers
    ' ── Konfigurationswerte für späteres Logging in New() ────────────────────
    Private Shared _ConfiguredEndpoint As String = String.Empty
    Private Shared _ConfiguredMaxCalls As Integer = 0
    Private Shared _ConfiguredMaxSessions As Integer = 0
    ' ─────────────────────────────────────────────────────────────────────────


    Public Shared Sub Configure(Config As ServiceConfiguration)
        Dim oBaseAddress = Config.BaseAddresses.Item(0)
        Dim oBinding = API.Channel.GetBinding()
        Dim oAddress = New EndpointAddress(oBaseAddress)
        Dim oDescription = ContractDescription.GetContract(GetType(IEDMIService), GetType(EDMIService))
        Dim oEndpoint As New ServiceEndpoint(oDescription, oBinding, oAddress)

        Config.AddServiceEndpoint(oEndpoint)
        Config.Description.Behaviors.Add(New ServiceDebugBehavior With {.IncludeExceptionDetailInFaults = True})

        Dim oThrottling = Config.Description.Behaviors.Find(Of ServiceThrottlingBehavior)()
        If oThrottling Is Nothing Then
            oThrottling = New ServiceThrottlingBehavior()
            Config.Description.Behaviors.Add(oThrottling)
        End If
        Dim oCpuCores As Integer = Environment.ProcessorCount
        oThrottling.MaxConcurrentCalls = Math.Max(200, 32 * oCpuCores)   ' war 16×
        oThrottling.MaxConcurrentSessions = Math.Max(400, 150 * oCpuCores)  ' war 100×
        oThrottling.MaxConcurrentInstances = Integer.MaxValue

        ' ── Werte für späteres Logging speichern ─────────────────────────────
        _ConfiguredEndpoint = oBaseAddress.ToString()
        _ConfiguredMaxCalls = oThrottling.MaxConcurrentCalls
        _ConfiguredMaxSessions = oThrottling.MaxConcurrentSessions
        ' ─────────────────────────────────────────────────────────────────────
    End Sub

    Public Sub New()
        Dim oOperationContext As OperationContext = OperationContext.Current
        Dim oInstanceContext As InstanceContext = oOperationContext.InstanceContext
        Dim oUsername = StripDomainFromUsername(oOperationContext.ServiceSecurityContext.WindowsIdentity.Name)
        Dim oSessionId As String = If(oOperationContext.SessionId, $"no-session_{Guid.NewGuid().ToString("N").Substring(0, 8)}")

        _Username = If(String.IsNullOrWhiteSpace(oUsername), "unknown", oUsername)
        _Logger = LogConfig.GetLogger()
        _IDBHelpers = New IDB.Helpers(LogConfig, MSSQL_IDB)

        Dim oEndpointSnapshot = Interlocked.Exchange(Of String)(_ConfiguredEndpoint, String.Empty)
        If Not String.IsNullOrEmpty(oEndpointSnapshot) Then
            _Logger.Info("✔ EDMIService configured | Endpoint=[{0}] | MaxCalls=[{1}] | MaxSessions=[{2}] | CPUs=[{3}]",
                         oEndpointSnapshot, _ConfiguredMaxCalls, _ConfiguredMaxSessions, Environment.ProcessorCount)
        End If

        _ActiveSessions(oSessionId) = _Username
        ' ← Neu: Session-Start loggen
        _Logger.Debug("Session opened | User=[{0}] | SessionId=[{1}] | ActiveSessions=[{2}]",
                     _Username, oSessionId, _ActiveSessions.Count)

        AddHandler oInstanceContext.Closed, Sub()
                                                Dim oRemoved As String = Nothing
                                                _ActiveSessions.TryRemove(oSessionId, oRemoved)
                                                _Logger.Debug("Session closed | User=[{0}] | SessionId=[{1}] | ActiveSessions=[{2}]",
                                                             _Username, oSessionId, _ActiveSessions.Count)
                                            End Sub

        AddHandler oInstanceContext.Faulted, Sub()
                                                 Dim oRemoved As String = Nothing
                                                 _ActiveSessions.TryRemove(oSessionId, oRemoved)
                                                 _Logger.Warn("⚠ Session faulted | User=[{0}] | SessionId=[{1}] | ActiveSessions=[{2}]",
                                                              _Username, oSessionId, _ActiveSessions.Count)
                                             End Sub

    End Sub
    ''' <summary>
    ''' Erstellt die User-Liste nur wenn nötig (Debug-Guard vorher prüfen).
    ''' </summary>
    Private Shared Function BuildUserList() As String
        Return String.Join(", ", _ActiveSessions.Values.Distinct().OrderBy(Function(u) u))
    End Function
#Region "=== Base ==="
    Public Function Heartbeat() As Boolean Implements IEDMIService.Heartbeat
        Return True
    End Function

    Public Function GetClientConfig() As Base.GetClientConfig.GetClientConfigResponse Implements IEDMIService.GetClientConfig
        _Logger.Debug("Start of Method [GetClientConfig]")
        Dim oGetClientConfig As New Base.GetClientConfig.GetClientConfigMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oGetClientConfig.Run()
    End Function
    ''' <summary>
    ''' Returns a snapshot of all currently active sessions for monitoring purposes
    ''' </summary>
    Public Function GetServiceStatus() As Messages.ServiceStatusResponse Implements IEDMIService.GetServiceStatus
        _Logger.Debug("GetServiceStatus called by User=[{0}]", _Username)
        ' Snapshot nur einmal erstellen, nicht zweimal iterieren:
        Dim oSnapshot = _ActiveSessions.ToArray()
        Return New Messages.ServiceStatusResponse With {
        .ActiveSessionCount = oSnapshot.Length,
        .ActiveUsers = oSnapshot.Select(Function(p) p.Value).Distinct().OrderBy(Function(u) u).ToList(),
        .ActiveSessions = oSnapshot.ToDictionary(Function(p) p.Key, Function(p) p.Value),
        .Timestamp = DateTime.Now
    }
    End Function
#End Region

    Public Function NewFile(Data As NewFile.NewFileRequest) As NewFile.NewFileResponse Implements IEDMIService.NewFile
        _Logger.Debug("Start of Method [NewFile]")
        Dim oNewFile As New NewFile.NewFileMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oNewFile.Run(Data)
    End Function

    Public Function UpdateFile(Data As UpdateFile.UpdateFileRequest) As UpdateFile.UpdateFileResponse Implements IEDMIService.UpdateFile
        _Logger.Debug("Start of Method [VersionFile]")
        Dim oVersionFile As New UpdateFile.UpdateFileMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oVersionFile.Run(Data)
    End Function

    Public Function SetAttributeValue(Data As SetAttributeValue.SetAttributeValueRequest) As SetAttributeValue.SetAttributeValueResponse Implements IEDMIService.SetAttributeValue
        _Logger.Debug("Start of Method [SetAttributeValue]")
        Dim oSetAttributeValue As New SetAttributeValue.SetAttributeValueMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oSetAttributeValue.Run(Data)
    End Function

    Public Function GetAttributeValue(Data As GetAttributeValue.GetAttributeValueRequest) As GetAttributeValue.GetAttributeValueResponse Implements IEDMIService.GetAttributeValue
        _Logger.Debug("Start of Method [GetAttributeValue]")
        Dim oGetAttributeValue As New GetAttributeValue.GetAttributeValueMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oGetAttributeValue.Run(Data)
    End Function

    Public Function GetFileObject(pData As GetFileObject.GetFileObjectRequest) As GetFileObject.GetFileObjectResponse Implements IEDMIService.GetFileObject
        _Logger.Debug("Start of Method [GetFileObject]")
        Dim oGetFileObject As New GetFileObject.GetFileObjectMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oGetFileObject.Run(pData)
    End Function

    Public Function CheckInOutFile(pData As CheckInOutFile.CheckInOutFileRequest) As CheckInOutFile.CheckInOutFileResponse Implements IEDMIService.CheckInOutFile
        _Logger.Debug("Start of Method [CheckInOutFile]")
        Dim oCheckInOutFile As New CheckInOutFile.CheckInOutFileMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oCheckInOutFile.Run(pData)
    End Function

    Public Function ImportFile(pData As ImportFile.ImportFileRequest) As ImportFile.ImportFileResponse Implements IEDMIService.ImportFile
        _Logger.Debug("Start of Method [IDB.ImportFile]")
        Dim oImportFile As New ImportFile.ImportFileMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oImportFile.Run(pData)
    End Function

    Public Function Globix_ImportFile(pData As GlobalIndexer.ImportFile.Globix_ImportFileRequest) As GlobalIndexer.ImportFile.Globix_ImportFileResponse Implements IEDMIService.Globix_ImportFile
        _Logger.Debug("Start of Method [Globix.ImportFile]")
        Dim oImportFile As New GlobalIndexer.ImportFile.ImportFileMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Return oImportFile.Run(pData)
    End Function


#Region "=== Database ==="
    Private Shared ReadOnly _CachedTablesLock As New Object()
    Private Shared _CachedTablesSnapshot As List(Of String) = Nothing
    Private Shared _CachedTablesExpiry As DateTime = DateTime.MinValue

    Public Function GetCachedTables() As List(Of String) Implements IEDMIService.GetCachedTables
        Try
            SyncLock _CachedTablesLock
                If _CachedTablesSnapshot Is Nothing OrElse DateTime.Now > _CachedTablesExpiry Then
                    _Logger.Debug("GetCachedTables: Refreshing cache...")
                    _CachedTablesSnapshot = GlobalState.GetCachedTables()
                    _CachedTablesExpiry = DateTime.Now.AddSeconds(30)
                    _Logger.Debug("GetCachedTables: Cache refreshed | Count=[{0}] | NextExpiry=[{1}]",
                                  _CachedTablesSnapshot.Count, _CachedTablesExpiry.ToString("HH:mm:ss"))
                End If
                Return _CachedTablesSnapshot.ToList()
            End SyncLock
        Catch ex As Exception
            _Logger.Error("GetCachedTables failed | User=[{0}] | Error=[{1}]", _Username, ex.Message)
            _Logger.Error(ex)
            Return New List(Of String)
        End Try
    End Function

    Public Function ReturnDatatableFromCache(Name As String, FilterExpression As String, SortByColumn As String) As TableResult Implements IEDMIService.ReturnDatatableFromCache
        Dim oReturnDatatableFromCache As New GetDatatableFromCache.GetDatatableFromCacheMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
        Dim oResult = oReturnDatatableFromCache.Run(New GetDatatableFromCache.GetDatatableFromCacheRequest With {
            .DataTable = Name,
            .FilterExpression = FilterExpression,
            .SortByColumn = SortByColumn
        })

        If oResult.OK Then
            Return New TableResult(oResult.Table)
        Else
            Return New TableResult(oResult.ErrorMessage)
        End If
    End Function

    Public Function ReturnDatatable(pData As GetDatatable.GetDatatableRequest) As GetDatatable.GetDatatableResponse Implements IEDMIService.ReturnDatatable
        Dim oWatch = Stopwatch.StartNew()
        Try
            _Logger.Debug("ReturnDatatable | User=[{0}] | DB=[{1}] | SQL=[{2}]",
                          _Username, pData.NamedDatabase, pData.SqlCommand)
            Dim oGetDatatable As New GetDatatable.GetDatatableMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
            Dim oResult = oGetDatatable.Run(pData)
            _Logger.Debug("ReturnDatatable completed | User=[{0}] | Rows=[{1}] | Duration=[{2}ms]",
                          _Username, If(oResult?.Table?.Rows.Count, 0), oWatch.ElapsedMilliseconds)
            Return oResult
        Catch ex As Exception
            _Logger.Error("ReturnDatatable failed | User=[{0}] | Duration=[{1}ms] | Error=[{2}]",
                          _Username, oWatch.ElapsedMilliseconds, ex.Message)
            Throw
        End Try
    End Function

    Public Function ReturnScalarValue(pData As GetScalarValue.GetScalarValueRequest) As GetScalarValue.GetScalarValueResponse Implements IEDMIService.ReturnScalarValue
        Dim oWatch = Stopwatch.StartNew()
        Try
            _Logger.Debug("ReturnScalarValue | User=[{0}] | DB=[{1}] | SQL=[{2}]",
                          _Username, pData.NamedDatabase, pData.SqlCommand)
            Dim oGetScalarValue As New GetScalarValue.GetScalarValueMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
            Dim oResult = oGetScalarValue.Run(pData)
            _Logger.Debug("ReturnScalarValue completed | User=[{0}] | Duration=[{1}ms]",
                          _Username, oWatch.ElapsedMilliseconds)
            Return oResult
        Catch ex As Exception
            _Logger.Error("ReturnScalarValue failed | User=[{0}] | Duration=[{1}ms] | Error=[{2}]",
                          _Username, oWatch.ElapsedMilliseconds, ex.Message)
            Throw
        End Try
    End Function

    Public Function ExecuteNonQuery(pData As ExecuteNonQuery.ExecuteNonQueryRequest) As ExecuteNonQuery.ExecuteNonQueryResponse Implements IEDMIService.ExecuteNonQuery
        Dim oWatch = Stopwatch.StartNew()
        Try
            _Logger.Debug("ExecuteNonQuery | User=[{0}] | DB=[{1}] | SQL=[{2}]",
                          _Username, pData.NamedDatabase, pData.SqlCommand)
            Dim oExecuteNonQuery As New ExecuteNonQuery.ExecuteNonQueryMethod(LogConfig, MSSQL_IDB, MSSQL_ECM, GlobalState)
            Dim oResult = oExecuteNonQuery.Run(pData)
            _Logger.Debug("ExecuteNonQuery completed | User=[{0}] | Duration=[{1}ms]",
                          _Username, oWatch.ElapsedMilliseconds)
            Return oResult
        Catch ex As Exception
            _Logger.Error("ExecuteNonQuery failed | User=[{0}] | Duration=[{1}ms] | Error=[{2}]",
                          _Username, oWatch.ElapsedMilliseconds, ex.Message)
            Throw
        End Try
    End Function
#End Region

#Region "=== Database (MSSQL IDB) ==="
    Public Function ReturnDatatable_MSSQL_IDB(SQL As String) As TableResult Implements IEDMIService.ReturnDatatable_MSSQL_IDB
        Try
            _Logger.Debug($"ReturnDatatable_MSSQL_IDB, SQL: {SQL}")
            Dim oResult As DataTable = MSSQL_IDB.GetDatatable(SQL)
            oResult.TableName = "DD_RESULT"
            Return New TableResult(oResult)

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function ReturnScalar_MSSQL_IDB(SQL As String) As ScalarResult Implements IEDMIService.ReturnScalar_MSSQL_IDB
        Try
            _Logger.Info($"ReturnScalar_MSSQL_IDB, SQL: {SQL}")
            Dim oResult As Object = MSSQL_IDB.GetScalarValue(SQL)
            Return New ScalarResult(oResult)

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function ExecuteNonQuery_MSSQL_IDB(SQL As String) As NonQueryResult Implements IEDMIService.ExecuteNonQuery_MSSQL_IDB
        Try
            _Logger.Info($"ExecuteNonQuery_MSSQL_IDB, SQL: {SQL}")
            Dim oResult As Boolean = MSSQL_IDB.ExecuteNonQuery(SQL)
            Return New NonQueryResult()

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function
#End Region

#Region "=== Database (MSSQL ECM) ==="
    Public Function ReturnDatatable_MSSQL_ECM(SQL As String) As TableResult Implements IEDMIService.ReturnDatatable_MSSQL_ECM
        Try
            _Logger.Info($"ReturnDatatable_MSSQL_ECM, SQL: {SQL}")
            Dim oResult As DataTable = MSSQL_ECM.GetDatatable(SQL)
            oResult.TableName = "DD_RESULT"
            Return New TableResult(oResult)

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function ReturnScalar_MSSQL_ECM(SQL As String) As ScalarResult Implements IEDMIService.ReturnScalar_MSSQL_ECM
        Try
            _Logger.Info($"ReturnScalar_MSSQL_ECM, SQL: {SQL}")
            Dim oResult As Object = MSSQL_ECM.GetScalarValue(SQL)
            Return New ScalarResult(oResult)

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function ExecuteNonQuery_MSSQL_ECM(SQL As String) As NonQueryResult Implements IEDMIService.ExecuteNonQuery_MSSQL_ECM
        Try
            _Logger.Info($"ExecuteNonQuery_MSSQL_ECM, SQL: {SQL}")
            Dim oResult As Boolean = MSSQL_ECM.ExecuteNonQuery(SQL)
            Return New NonQueryResult()

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function
#End Region

#Region "=== Database (Firebird) ==="
    Public Function ReturnDatatable_Firebird(SQL As String) As TableResult Implements IEDMIService.ReturnDatatable_Firebird
        Try
            _Logger.Info($"ReturnDatatable, SQL: {SQL}")
            Dim oResult As DataTable = Firebird.GetDatatable(SQL)
            oResult.TableName = "DD_RESULT"
            Return New TableResult(oResult)

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function ReturnScalar_Firebird(SQL As String) As ScalarResult Implements IEDMIService.ReturnScalar_Firebird
        Try
            _Logger.Info($"ReturnScalar, SQL: {SQL}")
            Dim oResult As Object = Firebird.GetScalarValue(SQL)
            Return New ScalarResult(oResult)

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function ExecuteNonQuery_Firebird(SQL As String) As NonQueryResult Implements IEDMIService.ExecuteNonQuery_Firebird
        Try
            _Logger.Info($"ExecuteNonQuery, SQL: {SQL}")
            Dim oResult As Boolean = Firebird.ExecuteNonQuery(SQL)
            Return New NonQueryResult()

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function
#End Region

#Region "=== Document ==="
    ''' <summary>
    ''' Imports a file according to ObjectStoreId
    ''' </summary>
    ''' <returns></returns>
    'Public Function ImportFile(Data As DocumentImportRequest) As DocumentImportResponse Implements IEDMIService.ImportFile
    '    Dim oObjectStore = GlobalState.ObjectStores.First()
    '    Dim EDMIPath = New EDMI.File.Path(LogConfig, oObjectStore.Path)

    '    ' TODO: 
    '    ' - Get Object Store -> Object Catalog -> Catalog Path
    '    ' - If IS_ARCHIVE = True And RetentionDays <> Nothing:
    '    '   DoArchive!
    '    ' - Refactor EDMIPath to get ObjectStore at service start up
    '    '   and return ObjectStore Path from ObjectStoreId + RelativePath
    '    ' VWIDB_OBJECTSTORE

    '    Dim oRelativePath As String = EDMIPath.GetRelativePath(Data.DocumentType, Data.FileName)
    '    Dim oAbsolutePath As String = EDMIPath.GetFullPath(Data.DocumentType, Data.FileName)
    '    Dim oDirectoryPath = EDMIPath.GetFullPath(Data.DocumentType)

    '    Try
    '        Directory.CreateDirectory(oDirectoryPath)

    '        Dim oVersionedFileName As String = Filesystem.GetVersionedFilename(oAbsolutePath)

    '        _Logger.Info("ImportFile: Saving file [{0}] to path [{1}]", Data.FileName, oVersionedFileName)
    '        Using oStream = New FileStream(oVersionedFileName, FileMode.CreateNew)
    '            oStream.Write(Data.Contents, 0, Data.Contents.Length)
    '            oStream.Flush(True)
    '            oStream.Close()
    '        End Using

    '        ' insert into db
    '        Dim oCommand As New SqlCommand("PRIDB_NEW_DOCUMENT")
    '        oCommand.Parameters.AddWithValue("@OBJ_ST_ID", 1)
    '        oCommand.Parameters.AddWithValue("@REL_PATH", oRelativePath)
    '        oCommand.Parameters.AddWithValue("@WHO", _Username)
    '        oCommand.Parameters.AddWithValue("@REF_DOCID", 0)
    '        oCommand.Parameters.Add(New SqlParameter("@IDB_OBJ_ID", SqlDbType.BigInt))

    '        Dim oObjectId = MSSQL_IDB.GetScalarValue(oCommand, "@IDB_OBJ_ID")

    '        Return New DocumentImportResponse() With {.ObjectId = oObjectId}

    '    Catch ex As FaultException
    '        _Logger.Error(ex)
    '        Throw ex

    '    Catch ex As Exception
    '        _Logger.Error(ex)
    '        Throw GetFault(ex)

    '    End Try
    'End Function

    Public Function GetFileByObjectId(Data As DocumentStreamRequest) As DocumentStreamResponse Implements IEDMIService.GetFileByObjectId
        Try
            Dim oFullPath = GetFullPathForObjectId(Data.ObjectId)

            If oFullPath = String.Empty Then
                Dim oDetails As New ObjectDoesNotExistFault(Data.ObjectId)
                _Logger.Warn("⚠ GetFileByObjectId: " & oDetails.ErrorMessage)
                Throw New FaultException(Of ObjectDoesNotExistFault)(oDetails, oDetails.ErrorMessage)
            End If

            _Logger.Debug("GetFileByObjectId: Loading file [{0}]", oFullPath)

            Dim oFileInfo As New FileInfo(oFullPath)

            If Not oFileInfo.Exists Then
                Dim oDetails As New ObjectDoesNotExistFault(Data.ObjectId)
                _Logger.Warn("⚠ GetFileByObjectId: " & oDetails.ErrorMessage)
                Throw New FaultException(Of ObjectDoesNotExistFault)(oDetails, oDetails.ErrorMessage)
            End If

            Dim oDestination As New MemoryStream()
            Using oSource As FileStream = IO.File.OpenRead(oFullPath)
                oSource.CopyTo(oDestination)
            End Using
            oDestination.Seek(0, SeekOrigin.Begin)

            Dim oMessage As New DocumentStreamResponse() With {
                .FileName = oFileInfo.Name,
                .FileContents = oDestination
            }

            Return oMessage

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function GetFileInfoByObjectId(Data As DocumentInfoRequest) As DocumentInfoResponse Implements IEDMIService.GetFileInfoByObjectId
        Try
            _Logger.Debug("GetFileInfoByObjectId...")
            Dim oAccessRight = GetAccessRightForObjectId(Data.UserId, Data.ObjectId)
            Dim oFullPath = GetFullPathForObjectId(Data.ObjectId)

            If oFullPath = String.Empty Then
                Dim oFault As New ObjectDoesNotExistFault(Data.ObjectId)
                Throw New FaultException(Of ObjectDoesNotExistFault)(oFault, oFault.ErrorMessage)
            End If

            Dim oResult = New DocumentInfoResponse With {
                .FileRight = oAccessRight,
                .FullPath = oFullPath
            }
            _Logger.Debug("End GetFileInfoByObjectId!")  ' ← jetzt erreichbar
            Return oResult

        Catch ex As FaultException
            _Logger.Warn("⚠ GetFileInfoByObjectId: " & ex.Message)
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Warn("⚠ GetFileInfoByObjectId: " & ex.Message)
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function ListFilesForUser() As DocumentListResponse Implements IEDMIService.ListFilesForUser
        Try
            Dim oDatatable = GetFileList()

            Return New DocumentListResponse() With {
                .Datatable = oDatatable
            }

        Catch ex As FaultException
            _Logger.Error(ex)
            Throw

        Catch ex As Exception
            _Logger.Error(ex)
            Throw GetFault(ex)

        End Try
    End Function

    Public Function GetFileList() As DataTable
        Try
            If Not GlobalState.TableStore.Tables.Contains(TBIDB_DOC_INFO) Then
                _Logger.Warn("⚠ GetFileList: Document info table does not exist!")
                Return Nothing
            End If

            Dim oTable As DataTable = GlobalState.TableStore.Tables.Item(TBIDB_DOC_INFO)
            Return oTable
        Catch ex As Exception
            _Logger.Warn("⚠ GetFileList: Unexpected Error while getting file list.")
            _Logger.Error(ex)
            Return Nothing
        End Try
    End Function

    Public Function TestObjectIdExists(Data As TestObjectIdExistsRequest) As TestObjectIdExistsResponse Implements IEDMIService.TestObjectIdExists
        Try
            Dim oDeleted As Boolean = False
            Dim oActive As Boolean = False

            If _IDBHelpers.TestObjectIdExists(Data.ObjectId, oDeleted, oActive) = False Then
                Return New TestObjectIdExistsResponse(False)
            End If

            Return New TestObjectIdExistsResponse(True) With {
                .Deleted = oDeleted,
                .Inactive = Not oActive
            }
        Catch ex As Exception
            _Logger.Error(ex)
            Return New TestObjectIdExistsResponse(False)

        End Try
    End Function




#End Region

#Region "=== Private ==="





    Private Function GetFault(Exception As Exception) As FaultException
        Dim oMessage = If(Exception?.Message, "Unknown error")
        _Logger.Error("Wrapping exception as FaultException | Error=[{0}]", oMessage)
        Dim oFault As New UnexpectedErrorFault(Exception)
        Dim oReason = If(Exception?.InnerException?.Message, oMessage)
        Return New FaultException(Of UnexpectedErrorFault)(oFault, New FaultReason(oReason))
    End Function

    Private Function GetFault(ErrorMessage As String) As FaultException
        _Logger.Error("Wrapping error as FaultException | Error=[{0}]", ErrorMessage)
        Dim oFault As New UnexpectedErrorFault(New ApplicationException(ErrorMessage))
        Return New FaultException(Of UnexpectedErrorFault)(oFault, New FaultReason(ErrorMessage))
    End Function

    Private Function GetFullPathForObjectId(ObjectId As Long) As String
        Try
            If Not GlobalState.TableStore.Tables.Contains(TBIDB_DOC_INFO) Then
                _Logger.Warn("⚠ GetFullPathForObjectId: Document info table does not exist!")
                Return String.Empty
            End If

            Dim oTable As DataTable = GlobalState.TableStore.Tables.Item(TBIDB_DOC_INFO)
            Dim oRows As List(Of DataRow) = oTable.Select($"IDB_OBJ_ID = {ObjectId}").ToList()

            Dim oFullPath As String

            If oRows.Count = 0 Then
                _Logger.Warn("⚠ GetFullPathForObjectId: Full path does not exist for object [{0}]", ObjectId)
                oFullPath = String.Empty
            Else
                Dim oRow As DataRow = oRows.First()
                oFullPath = oRow.Item("FULL_PATH")
            End If

            Return oFullPath
        Catch ex As Exception
            _Logger.Warn("⚠ GetFullPathForObjectId: Unexpected Error while getting full path for object [{0}].", ObjectId)
            _Logger.Error(ex)
            Return String.Empty
        End Try
    End Function

    Private Function GetAccessRightForObjectId(UserId As Long, ObjectId As Long) As AccessRight
        Try
            If Not GlobalState.TableStore.Tables.Contains(TBIDB_ACCESSRIGHT) Then
                _Logger.Warn("⚠ GetAccessRightForObjectId: Access right table does not exist!")
                Return AccessRight.VIEW_ONLY
            End If

            _Logger.Debug("Getting AccessRights for ObjectId [{0}]", ObjectId)
            Dim oTable As DataTable = GlobalState.TableStore.Tables.Item(TBIDB_ACCESSRIGHT)
            Dim oRows As List(Of DataRow) = oTable.Select($"IDB_OBJ_ID = {ObjectId} AND USR_ID = {UserId}").ToList()
            Dim oRight As AccessRight

            _Logger.Debug("Successfully got AccessRights for ObjectId [{0}]", ObjectId)
            _Logger.Debug("Parsing AccessRights for ObjectId [{0}]", ObjectId)

            If oRows.Count = 0 Then
                _Logger.Warn("⚠ GetAccessRightForObjectId: Access right assignment does not exist for user [{0}] on object [{1}]", UserId, ObjectId)
                Return AccessRight.VIEW_ONLY
            Else
                If oRows.Count > 1 Then
                    _Logger.Warn("⚠ GetAccessRightForObjectId: More than one access right assignment found for user [{0}] on object [{1}]", UserId, ObjectId)
                End If

                Dim oRow As DataRow = oRows.First()
                Dim oRightAsInt = oRow.Item("ACCESSRIGHT")

                Select Case oRightAsInt
                    Case 1
                        oRight = AccessRight.VIEW_ONLY
                    Case 2
                        oRight = AccessRight.VIEW_EXPORT
                    Case 4
                        oRight = AccessRight.FULL
                    Case Else
                        _Logger.Warn("⚠ GetAccessRightForObjectId: Unknown access right [{0}] for user [{1}] on object [{2}]", oRightAsInt, UserId, ObjectId)
                        oRight = AccessRight.VIEW_ONLY
                End Select
            End If

            _Logger.Debug("Successfully parsed AccessRights for ObjectId [{0}]", ObjectId)
            _Logger.Debug("AccessRight for ObjectId [{0}] is [{1}]", ObjectId, oRight.ToString)

            Return oRight
        Catch ex As Exception
            _Logger.Warn("⚠ GetAccessRightForObjectId: Unexpected Error while getting access right for object [{0}].", ObjectId)
            _Logger.Error(ex)
            Return AccessRight.VIEW_ONLY
        End Try
    End Function

    Private Function StripDomainFromUsername(UserName As String)
        If UserName.Contains("\") Then
            Return UserName.Split("\")(1)
        ElseIf UserName.Contains("@") Then
            Return UserName.Split("@")(0)
        Else
            Return UserName
        End If
    End Function


#End Region


End Class