Imports DigitalData.Modules.Logging
Imports DigitalData.Modules.EDMIFileOps.EDMIServiceReference
Imports System.ServiceModel
Imports System.IO

Public Class FileOp
    Private _logger As Logger
    Private _logConfig As LogConfig
    Private _channelFactory As ChannelFactory(Of IEDMServiceChannel)
    Private _channel As IEDMServiceChannel
    Public Sub New(LogConfig As LogConfig, EDMI_ServiceAdress As String)
        _logger = LogConfig.GetLogger()
        _logConfig = LogConfig

        Try
            Dim binding As New NetTcpBinding()
            binding.Security.Mode = SecurityMode.Transport
            binding.Security.Transport.ClientCredentialType = TcpClientCredentialType.Windows
            binding.MaxReceivedMessageSize = 2147483647
            binding.MaxBufferSize = 2147483647
            binding.MaxBufferPoolSize = 2147483647
            binding.MaxConnections = 10000
            binding.ReaderQuotas.MaxArrayLength = 2147483647
            binding.ReaderQuotas.MaxStringContentLength = 2147483647
            Dim endpointAddress = New EndpointAddress(EDMI_ServiceAdress)
            _channelFactory = New ChannelFactory(Of IEDMServiceChannel)(binding, endpointAddress)
            Connect2NetService()
        Catch ex As Exception
            _logger.Error(ex)
        End Try

    End Sub
    Private Function Connect2NetService()
        Try
            _channel = Nothing
            _channel = _channelFactory.CreateChannel()
            _logger.Info("Successfully connected to EDM_Network Service")
            AddHandler _channel.Faulted, AddressOf Reconnect
            _channel.Open()
            Return True
        Catch ex As Exception
            _logger.Error(ex)
            Return True
        End Try
    End Function
    Private Sub Reconnect()
        _channel.Abort()
        Connect2NetService()
    End Sub

    Public Async Function New_EDMI_File(oFILENAME As String, oUserName As String) As Task(Of String)
        Try
            Dim oFileGUID = Await New_EDMIFile_CreateContainer(oFILENAME)
            Dim oFileRecordID = Nothing
            If Not IsNothing(oFileGUID) Then
                Dim oSQL = $"SELECT FNEDMI_SET_RECORD(""TBEDMI_ADRESSE"",""{oUserName}"",FALSE,NULL,"""",'{oFileGUID}') FROM rdb$database;"
                oFileRecordID = Await New_EDMIFile_CreateDB_Record(oSQL)
            End If
            Return oFileRecordID
        Catch ex As Exception
            _logger.Error(ex)
            Return Nothing
        End Try
    End Function
    Private Async Function New_EDMIFile_CreateContainer(oFILENAME As String) As Task(Of String)
        Try
            Dim sw As New Stopwatch()
            sw.Start()
            Dim oFileContents = File.ReadAllBytes(oFILENAME)
            Dim oExtension As String = New FileInfo(oFILENAME).Extension.Substring(1)
            Dim oFileGUID = Await _channel.CreateFileAsync(oFileContents, oExtension)
            sw.Stop()
            _logger.Info($"File successfully transferred - stopwatch: {sw.Elapsed.ToString}")
            Return oFileGUID
        Catch ex As Exception
            _logger.Error(ex)
            Return Nothing
        End Try
    End Function
    Private Async Function New_EDMIFile_CreateDB_Record(FBCommand As String) As Task(Of String)
        Try
            Dim oTimeTotal As TimeSpan
            Dim oStopwatch As New Stopwatch()
            oStopwatch.Start()
            Dim oRecord_ID As String
            Dim oRequestName = Await _channel.CreateDatabaseRequestAsync("CreateEDMFileRecord", True)
            Dim oResult = Await _channel.ReturnScalarAsync(FBCommand)

            oTimeTotal = oStopwatch.Elapsed
            oStopwatch.Reset()

            Await _channel.CloseDatabaseRequestAsync()

            If Not oResult.OK Then
                _logger.Warn($"Unexpected error while executing command: {oResult.ErrorMessage}")
            Else
                oRecord_ID = oResult.Scalar
                _logger.Debug($"SCALAR (SERVICE) {FBCommand} - TIME: {(oTimeTotal.ToString)}")
            End If
            Return oRecord_ID
        Catch ex As Exception
            _logger.Error(ex)
            Return Nothing
        End Try
    End Function
    Public Async Function Load_EDMIFile_2TempPath(oEDMIFile_GUID As String) As Task(Of String)
        Try
            Dim oResult As EDMIServiceReference.ContainerResult = Await _channel.GetFileAsync(oEDMIFile_GUID)
            Dim oTempPath = Path.Combine(Path.GetTempPath(), "EDMI_FileContainer")
            Directory.CreateDirectory(oTempPath)
            Dim oFilePath = Path.Combine(oTempPath, $"{oResult.Container.FileId}.{oResult.Container.Extension}")
            File.WriteAllBytes(oFilePath, oResult.Container.Contents)
            ' Process.Start(oTempPath)
            Return oTempPath
        Catch ex As Exception
            _logger.Error(ex)
            Return Nothing
        End Try
    End Function
End Class