Imports System.Collections.Generic
Imports System.Net
Imports System.Net.Http
Imports System.Web.Http
Imports System.Web.Http.Description
Imports System.Data
Imports Windream.WebService.WebAPI.PlugIns
Imports Windream.WebService.Documents
Imports WMOBRWSLib
Imports WINDREAMLib
Imports WMCNNCTDLLLib
Imports DD_LIB_Standards.clsDatabase

Imports NLog
Imports NLog.Targets
Imports NLog.Config

Imports System.Reflection
Imports System.Xml
Imports System.Net.Http.Headers
Imports System.Threading
Imports System.Threading.Tasks
Imports System.Web.Http.Controllers

Namespace Controllers

    Public Class DigitalDataController
        Inherits PlugInBaseController

        Private _routesSettings As IEnumerable(Of RouteSettings)
        Private _docController As IDocumentsController
        Private _session As IWMSession6
        Private _logger As Logger

        ''' <summary>
        ''' Gets the routes settings for the controller.
        ''' This property will automatically be called from the windream Web Service - WebAPI framework.
        ''' </summary>
        ''' <value>
        ''' The routes settings of the controller.
        ''' </value>
        Public Overrides ReadOnly Property RoutesSettings As IEnumerable(Of RouteSettings)
            Get
                Return _routesSettings
            End Get
        End Property


        Public Overrides Function ExecuteAsync(controllerContext As HttpControllerContext, cancellationToken As CancellationToken) As Task(Of HttpResponseMessage)
            Return MyBase.ExecuteAsync(controllerContext, cancellationToken)
        End Function

        ''' <summary>
        ''' Initializes a new instance of the <see cref="DigitalDataController"/> class.
        ''' </summary>
        Sub New()
            Dim routesSettings As List(Of RouteSettings) = New List(Of RouteSettings)()
            routesSettings.Add(New RouteSettings("DigitalDataController", "DigitalData/{action}/{id}", New With {.id = RouteParameter.Optional, .controller = "DigitalData"}))
            _routesSettings = routesSettings

            Dim config = New LoggingConfiguration()

            Dim fileTarget = New FileTarget() With {
                .Name = "BNSPlugin",
                .ArchiveEvery = FileArchivePeriod.Day,
                .FileName = "D:/ProgramFiles/DigitalData/SERVICES/WMWebServiceBNS/Log/${date:format=yyyy-MM-dd}-WMWebServiceBNS.txt",
                .Layout = "${longdate} || ${message}"
            }

            config.AddTarget("file", fileTarget)

            Dim rule = New LoggingRule("*", LogLevel.Debug, fileTarget)
            config.LoggingRules.Add(rule)

            LogManager.Configuration = config
            _logger = LogManager.GetLogger("DigitalDataController")

            Dim connectionString = GetConnectionString()

            _logger.Info($"[DATABASE] Verbindung zu {connectionString}")

            Dim dbInit = Init(connectionString)
            If dbInit = False Then
                _logger.Info("[DATABASE] Die Verbindung zur Datenbank konnte nicht hergestellt werden.")
            Else
                _logger.Info("[DATABASE] Die Verbindung zur Datenbank wurde hergestellt.")
            End If
            _logger.Info("[INIT] Die Initialisierung wurde abgeschlossen.")
        End Sub

        Private Function GetPluginPath()
            Dim s = Assembly.GetExecutingAssembly().CodeBase
            s = New Uri(s).AbsolutePath
            s = Uri.UnescapeDataString(s)
            s = IO.Path.GetFullPath(s)
            s = IO.Path.GetDirectoryName(s)

            Return s
        End Function

        Private Function GetConnectionString()
            Dim path As String = GetPluginPath()
            Dim configFile = path & "\config.xml"

            If IO.File.Exists(configFile) Then
                Dim Doc As XmlDocument = New XmlDocument()
                Doc.Load(configFile)

                Dim connectionString As String = Doc.DocumentElement.SelectSingleNode("/config/connectionString").InnerText

                _logger.Info($"[CONFIG] Konfigurations Datei {configFile} wurde gefunden")
                Return connectionString
            Else
                _logger.Info($"[CONFIG] Konfigurations Datei {configFile} wurde NICHT gefunden!")

                Return Nothing
            End If
        End Function


        ''' <summary>
        ''' A simple example of a http-get service method implementation.
        ''' </summary>
        ''' <param name="docId">windream Document-ID</param>
        ''' <param name="userId">windream User-ID</param>
        ''' <remarks>This method creates a nice greeting.</remarks>
        '<ResponseType(GetType(String))>
        <HttpGet>
        Public Function BNSDownload(<FromUri> docId As Integer, <FromUri> userId As String) As HttpResponseMessage
            Dim DT As DataTable
            Dim Domain, Username, Password As String

            _logger.Info($"[REQUEST] Anfrage von Benutzer-ID {userId} für Dokument-ID {docId}")

            Try
                DT = Return_Datatable($"SELECT DOMAIN, USERNAME, PW FROM TBDD_WEBSERVICE_USER_EX WHERE USERNAME_LINK = '{userId}'")
            Catch ex As Exception
                _logger.Info("[DATABASE] Fehler beim Zugriff auf die Datenbank ")
                _logger.Info(ex.Message)

                Return CreateResponseMessage(Request, HttpStatusCode.InternalServerError)
            End Try

            If DT.Rows.Count = 0 Then
                _logger.Info($"[DATABASE] BenutzerID {userId} wurde nicht in der Datenbank gefunden.")
                Return CreateResponseMessage(Request, $"Benutzer {userId} wurde nicht gefunden", HttpStatusCode.Unauthorized)
            Else
                Dim firstRow As DataRow = DT.Rows.Item(0)

                Domain = firstRow.Item("DOMAIN")
                Username = firstRow.Item("USERNAME")
                Password = firstRow.Item("PW")

                _logger.Info($"[DATABASE] BenutzerID {userId} wurde gefunden.")
            End If

            Dim loggedIn As Boolean = CreateSessionForUser(Username, Password, Domain)

            If Not loggedIn Then
                Return CreateResponseMessage(Request, $"Session für Benutzer {userId} konnte nicht aufgebaut werden. Weitere Informationen im Log", HttpStatusCode.BadRequest)
            End If


            Dim WMDoc As IWMObject7
            Dim WMStream As IWMStream
            Dim fileContent As Byte()

            Try
                WMDoc = _session.GetWMObjectById(WMEntity.WMEntityDocument, docId)
            Catch ex As Exception
                _logger.Info("[WINDREAM/GetWMObjectById] Ein Fehler beim Zugriff auf Windream ist aufgetreten ")
                _logger.Info(ex.Message)
                _logger.Info($"[WINDREAM/Session] Session für Benutzer {Username} wird geschlossen")
                _session.Logout()

                Return CreateResponseMessage(Request, "Document not found", HttpStatusCode.NotFound)
            End Try

            Try
                WMStream = WMDoc.OpenStream("BinaryObject", WMObjectStreamOpenMode.WMObjectStreamOpenModeRead)
                fileContent = WMStream.Read(WMStream.GetSize())
            Catch ex As Exception
                _logger.Info("[WINDREAM/OpenStream] Ein Fehler beim Zugriff auf Windream ist aufgetreten")
                _logger.Info(ex.Message)
                _logger.Info($"[WINDREAM/Session] Session für Benutzer {Username} wird geschlossen")
                _session.Logout()

                Return CreateResponseMessage(Request, HttpStatusCode.InternalServerError)
            End Try

            _logger.Info($"[WINDREAM/Session] Session für Benutzer {Username} wird geschlossen")
            _session.Logout()

            ' Gibt die Datei zum Download zurück
            Return CreateFileResponseMessage(fileContent, WMDoc.aName)
        End Function

        Private Function CreateFileResponseMessage(data As Byte(), filename As String) As HttpResponseMessage
            _logger.Info($"[WINDREAM/Download] Datei {filename} wird für Download zur Verfügung gestellt")
            Dim Res = New HttpResponseMessage()
            Res.StatusCode = HttpStatusCode.OK
            Res.Content = New ByteArrayContent(data)
            Res.Content.Headers.ContentType = New MediaTypeHeaderValue("application/octet-stream")
            Res.Content.Headers.ContentDisposition = New ContentDispositionHeaderValue("attachment") With {
                .FileName = filename
            }
            Return Res
        End Function

        Private Function CreateSessionForUser(username As String, password As String, domain As String)
            Dim WMServerBrowser As New ServerBrowser()
            Dim DMSServer As String
            Dim Connect As IWMConnect2
            Dim Session As IWMSession6
            Dim User As WMOTOOLLib.WMUserIdentity

            Try
                '' Get the current Windream Server
                DMSServer = WMServerBrowser.GetCurrentServer()
            Catch ex As Exception
                _logger.Info($"[WINDREAM/ServerBrowser] DMS Server konnte nicht ausgelesen werden.")
                _logger.Info(ex.Message)
                Return False
            End Try

            Try
                ' Create a User Object for Session
                User = New WMOTOOLLib.WMUserIdentity()
                User.aDomain = domain
                User.aPassword = password
                User.aUserName = username
                User.aServerName = DMSServer
            Catch ex As Exception
                _logger.Info($"[WINDREAM/User] User Objekt konnte nicht erstellt werden.")
                _logger.Info(ex.Message)
                Return False
            End Try


            _logger.Info("[WINDREAM/Session] Session wird aufgebaut")
            _logger.Info($"[WINDREAM/Session] Username: {username}")
            _logger.Info($"[WINDREAM/Session] Passwort: {password}")
            _logger.Info($"[WINDREAM/Session] Domäne: {domain}")
            _logger.Info($"[WINDREAM/Session] Windream Server: {DMSServer}")

            Try
                ' Create Connect Object for Session
                Connect = New WMConnect()
                Connect.ModuleId = 9
            Catch ex As Exception
                _logger.Info($"[WINDREAM/Connect] Connect Objekt konnte nicht erstellt werden.")
                _logger.Info(ex.Message)
                Return False
            End Try


            Try
                Session = Connect.Login(User)
                _logger.Info($"[WINDREAM/Session] Session wurde aufgebaut")

                If Session.aLoggedin Then
                    _session = Session

                    _logger.Info($"[WINDREAM/Session] Benutzer {username} ist eingeloggt")
                    Return True
                Else
                    _logger.Info($"[WINDREAM/Session] Fehler beim Aufbau der Session. Benutzer {username} ist nicht eingeloggt!")
                    Return False
                End If
            Catch ex As Exception
                _logger.Info($"[WINDREAM/Session] Fehler bei Login von Benutzer {username}!")
                _logger.Info(ex.Message)

                If Not IsNothing(Session) AndAlso Session.aLoggedin Then
                    _session = Session
                    _logger.Info($"[WINDREAM/Session] Benutzer {username} ist eingeloggt")
                    Return True
                Else
                    _logger.Info($"[WINDREAM/Session] Fehler beim Aufbau der Session. Benutzer {username} ist nicht eingeloggt!")
                    _logger.Info(ex.Message)
                    Return False
                End If
            End Try
        End Function

    End Class

End Namespace