Imports System.Collections.Generic
Imports System.IO
Imports System.Linq
Imports DigitalData.Modules.Database
Imports DigitalData.Modules.Interfaces
Imports DigitalData.Modules.Logging
Imports DigitalData.Modules.Filesystem

Public Class ImportZUGFeRDFiles
    Implements IJob

    Public Const ZUGFERD_IN = "ZUGFeRD in"
    Public Const ZUGFERD_ERROR = "ZUGFeRD Error"
    Public Const ZUGFERD_SUCCESS = "ZUGFeRD Success"

    Private _logger As Logger
    Private _logConfig As LogConfig
    Private _zugferd As ZUGFeRDInterface
    Private _firebird As Firebird
    Private _filesystem As Filesystem.File

    Public Class WorkerArgs
        Public WatchDirectories As List(Of String)
        Public SuccessDirectory As String
        Public ErrorDirectory As String
        Public PropertyMap As Dictionary(Of String, XmlItemProperty)

        Public Sub New()
            WatchDirectories = New List(Of String)
            SuccessDirectory = Nothing
            ErrorDirectory = Nothing
            PropertyMap = New Dictionary(Of String, XmlItemProperty)
        End Sub
    End Class

    Public Class XmlItemProperty
        Public TableName As String
        Public Description As String
        Public IsRequired As Boolean
    End Class

    Public Sub New(LogConfig As LogConfig, Firebird As Firebird)
        _logConfig = LogConfig
        _logger = LogConfig.GetLogger()
        _firebird = Firebird
        _filesystem = New Filesystem.File(_logConfig)
        _zugferd = New ZUGFeRDInterface(_logConfig)
    End Sub

    Public Sub Start(Arguments As Object) Implements IJob.Start
        Dim args As WorkerArgs = Arguments

        _logger.Info("Starting Job {0}", Me.GetType.Name)
        For Each oPath As String In args.WatchDirectories
            Dim oDirInfo As New DirectoryInfo(oPath)

            _logger.Info($"Start processing directory {oDirInfo.FullName}")

            If oDirInfo.Exists Then
                Dim oFiles As List(Of FileInfo) = oDirInfo.GetFiles().ToList()
                Dim oFileCount = oFiles.Count
                Dim oCurrentFileCount = 0

                _logger.Info("Found {0} files", oFileCount)

                For Each oFile In oFiles
                    oCurrentFileCount += 1
                    _logger.Info($"({oCurrentFileCount}/{oFileCount}) Start processing file {oFile.Name}")

                    Dim oMoveDirectory As String = args.SuccessDirectory
                    Dim oDocument As CrossIndustryDocumentType
                    Dim oValues As New Dictionary(Of String, String)
                    Dim oGuid As String = Path.GetFileNameWithoutExtension(oFile.FullName)

                    Dim oConnection = _firebird.GetConnection()
                    Dim oTransaction = oConnection.BeginTransaction()

                    Try
                        oDocument = _zugferd.ExtractZUGFeRDFile(oFile.FullName)

                        For Each mapping In args.PropertyMap
                            Dim propertyValue As String = PropertyValues.GetPropValue(oDocument, mapping.Key)
                            Dim propertyDescripton As String = mapping.Value.Description

                            ' TODO: Check for missing values
                            If String.IsNullOrEmpty(propertyValue) Then
                                _logger.Warn("Property {0} is empty or not found", propertyDescripton)
                            End If

                            If String.IsNullOrEmpty(propertyValue) And mapping.Value.IsRequired Then
                                _logger.Error("Property {0} is empty but required!", propertyDescripton)
                                Throw New ApplicationException($"Property {propertyDescripton} is empty but required!")
                            End If

                            Console.WriteLine("{0} => {1}", propertyDescripton, propertyValue)
                            oValues.Add(propertyDescripton, propertyValue)

                            Dim oTableName = mapping.Value.TableName
                            Dim oCommand = $"INSERT INTO {oTableName} (REFERENCE_GUID, ITEM_DESCRIPTION, ITEM_VALUE) VALUES ('{oGuid}', '{propertyDescripton}', '{propertyValue}')"

                            _logger.Info("Mapping Property {0} to value {1}. Will be inserted into table {2}", propertyDescripton, propertyValue, oTableName)

                            _firebird.ExecuteNonQueryWithConnection(oCommand, oConnection, Firebird.TransactionMode.ExternalTransaction, oTransaction)
                        Next

                        oTransaction.Commit()
                    Catch ex As Exception
                        oTransaction.Rollback()
                        oMoveDirectory = args.ErrorDirectory
                        _logger.Error(ex, "File {0} was not processesd. Transaction rolled back.")
                    Finally
                        oConnection.Close()
                        _filesystem.MoveTo(oFile.FullName, oMoveDirectory)
                        _logger.Info("Finished processing file {0}", oFile.Name)
                    End Try
                Next
            Else
                _logger.Debug("Directory {0} does not exist", oPath)
            End If

            _logger.Info("Finished processing directory {0}", oPath)
        Next
    End Sub




End Class