Imports System.ComponentModel
Imports System.IO
Imports System.Timers
Imports DigitalData.Modules.Config
Imports DigitalData.Modules.Database
Imports DigitalData.Modules.Interfaces
Imports DigitalData.Modules.Jobs
Imports DigitalData.Modules.Logging

Public Class ThreadRunner

    Private WithEvents _workerThread As BackgroundWorker
    Private WithEvents _workerTimer As Timer

    Private ReadOnly _config As ConfigManager(Of Config)
    Private ReadOnly _logConfig As LogConfig
    Private ReadOnly _logger As Logger
    Private ReadOnly _jobArguments As WorkerArgs
    Private ReadOnly _mssql As MSSQLServer

    Private BusyCounter As Integer = 0

    Public Sub New(LogConfig As LogConfig, ConfigManager As ConfigManager(Of Config), MSSQL As MSSQLServer)
        _logConfig = LogConfig
        _logger = _logConfig.GetLogger()
        _config = ConfigManager
        _mssql = MSSQL
        Try
            Dim directory As New IO.DirectoryInfo(_logConfig.LogDirectory)

            For Each file As IO.FileInfo In directory.GetFiles
                If (Now - file.CreationTime).Days > 29 Then
                    file.Delete()
                Else
                    Exit For
                End If


            Next
        Catch ex As Exception

        End Try

        Dim oArgs As New WorkerArgs With {
            .ExceptionEmailAddress = _config.Config.ExceptionEmailAddress,
            .IgnoreRejectionStatus = _config.Config.Custom.IgnoreRejectionStatus,
            .MaxAttachmentSizeInMegaBytes = _config.Config.Custom.MaxAttachmentSizeInMegaBytes,
            .MinFileAgeInMinutes = _config.Config.Custom.MinFileAgeInMinutes,
            .NamePortal = _config.Config.PORTAL_NAME,
            .EmailOutProfileId = _config.Config.MSSQLEmailOutAccountID,
            .AllowFacturX = _config.Config.Custom.AllowFacturX,
            .AllowXRechnung = _config.Config.Custom.AllowXRechnung,
            .AllowZugferd10 = _config.Config.Custom.AllowZugferd10,
            .AllowZugferd2x = _config.Config.Custom.AllowZugferd2x,
            .AllowZugferd23x = _config.Config.Custom.AllowZugferd23x,
            .AllowPeppolBISBill3x = _config.Config.Custom.AllowPeppolBISBill3x,
            .RejectionTemplateId = _config.Config.Custom.RejectionTemplateId,
            .GDPictureVersion = _config.Config.Custom.GDPictureVersion
        }

        oArgs = LoadFolderConfig(oArgs)
        oArgs = LoadPropertyMapListFor(oArgs)

        _logger.Debug("Custom Options:")
        _logger.Debug("ExceptionEmailAddress: [{0}]", oArgs.ExceptionEmailAddress)
        _logger.Debug("IgnoreRejectionStatus: [{0}]", oArgs.IgnoreRejectionStatus)
        _logger.Debug("MaxAttachmentSizeInMegaBytes: [{0}]", oArgs.MaxAttachmentSizeInMegaBytes)
        _logger.Debug("MinFileAgeInMinutes: [{0}]", oArgs.MinFileAgeInMinutes)
        _logger.Debug("RejectionTemplateId: [{0}]", oArgs.RejectionTemplateId)
        _logger.Debug("GDPictureVersion: [{0}]", oArgs.GDPictureVersion)

        _jobArguments = oArgs

        _logger.Debug("Checking SuccessDirectory [{0}]", oArgs.SuccessDirectory)
        If Not Directory.Exists(oArgs.SuccessDirectory) Then
            _logger.Warn("SuccessDirectory [{0}] does not exist!", oArgs.SuccessDirectory)
        End If

        _logger.Debug("Checking ErrorDirectory [{0}]", oArgs.ErrorDirectory)
        If Not Directory.Exists(oArgs.ErrorDirectory) Then
            _logger.Warn("ErrorDirectory [{0}] does not exist!", oArgs.ErrorDirectory)
        End If

        _logger.Debug("Checking Original Email Directory [{0}]", oArgs.OriginalEmailDirectory)
        If Not Directory.Exists(oArgs.OriginalEmailDirectory) Then
            _logger.Warn("OriginalEmailDirectory [{0}] does not exist!", oArgs.OriginalEmailDirectory)
        End If

        _logger.Debug("Checking Rejected Email Directory [{0}]", oArgs.RejectedEmailDirectory)
        If Not Directory.Exists(oArgs.RejectedEmailDirectory) Then
            _logger.Warn("RejectedEmailDirectory [{0}] does not exist!", oArgs.RejectedEmailDirectory)
        End If

        _logger.Debug("Checking Non ZUGFeRD Directory [{0}]", oArgs.NonZugferdDirectory)
        If Not Directory.Exists(oArgs.NonZugferdDirectory) Then
            _logger.Warn("NonZugferdDirectory [{0}] does not exist!", oArgs.NonZugferdDirectory)
        End If

        _logger.Debug("Checking Watch Directory [{0}]", oArgs.WatchDirectory)
        If Not Directory.Exists(oArgs.WatchDirectory) Then
            _logger.Warn("WatchDirectory [{0}] does not exist!", oArgs.WatchDirectory)
        End If

        _logger.Debug("Checking Exception Email Adress [{0}]", oArgs.ExceptionEmailAddress)
        If oArgs.ExceptionEmailAddress = String.Empty Then
            _logger.Warn("ExceptionEmailAddress [{0}] is not set!", oArgs.ExceptionEmailAddress)
        End If

        _workerThread = New BackgroundWorker() With {
            .WorkerReportsProgress = False,
            .WorkerSupportsCancellation = True
        }

        _workerTimer = New Timer()
    End Sub

    Public Sub Start(Interval As Integer)
        _workerTimer.Interval = Interval * 1000
        _workerTimer.Start()
        _logger.Debug("ThreadRunner started with {0}s Interval.", Interval)
    End Sub

    Public Sub [Stop]()
        Try
            If _workerThread.IsBusy Then
                _workerThread.CancelAsync()
                _logger.Debug("Worker cancelled.")
            End If
            _workerTimer.Stop()
            _logger.Debug("ThreadRunner stopped.")
        Catch ex As Exception
            _logger.Error(ex)
        End Try
    End Sub

    Private Sub TimerElapsed(sender As Object, e As ElapsedEventArgs) Handles _workerTimer.Elapsed
        If Not _workerThread.IsBusy Then
            BusyCounter = 0
            _workerThread.RunWorkerAsync(_jobArguments)
        Else
            BusyCounter = +1
            _logger.Info("Worker is busy, skipping execution. Tried for [{0}] times.", BusyCounter)
        End If
    End Sub

    Private Sub DoWork(sender As Object, e As DoWorkEventArgs) Handles _workerThread.DoWork
        Try
            Dim oArgs As WorkerArgs = e.Argument
            _logger.Debug("Background worker running..")

            Dim oJob As New ImportZUGFeRDFiles(_logConfig, _mssql)
            oJob.Start(oArgs)
        Catch ex As Exception
            _logger.Warn("Background worker failed!")
            _logger.Error(ex)
        End Try
    End Sub

    Private Sub WorkCompleted(sender As Object, e As RunWorkerCompletedEventArgs) Handles _workerThread.RunWorkerCompleted
        _logger.Debug("Background worker completed!")
    End Sub

    Private Function LoadFolderConfig(pArgs As WorkerArgs) As WorkerArgs
        pArgs.WatchDirectory = _config.Config.WatchDirectory
        pArgs.SuccessDirectory = _config.Config.SuccessDirectory
        pArgs.ErrorDirectory = _config.Config.ErrorDirectory
        pArgs.OriginalEmailDirectory = _config.Config.OriginalEmailDirectory
        pArgs.RejectedEmailDirectory = _config.Config.RejectedEmailDirectory
        pArgs.AttachmentsSubDirectory = _config.Config.AttachmentsSubDirectory
        pArgs.NonZugferdDirectory = _config.Config.NonZugferdDirectory

        Return pArgs
    End Function

    Private Function LoadPropertyMapListFor(Args As WorkerArgs) As WorkerArgs
        Try
            Args.PropertyMapList.Clear()

            Dim oSQL As String = $"SELECT * FROM TBDD_ZUGFERD_XML_ITEMS WHERE ACTIVE = 1 ORDER BY XML_PATH"
            Dim oResult As DataTable = _mssql.GetDatatable(oSQL)

            For Each oRow As DataRow In oResult.Rows
                Dim xmlPath As String = oRow.Item("XML_PATH")
                Dim tableName = oRow.Item("TABLE_NAME")
                Dim tableColumn = oRow.Item("TABLE_COLUMN")
                Dim description = oRow.Item("DESCRIPTION")
                Dim isRequired = oRow.Item("IS_REQUIRED")
                Dim isGrouped = oRow.Item("IS_GROUPED")
                Dim groupScope = oRow.Item("GROUP_SCOPE")
                Dim specification = oRow.Item("SPECIFICATION")
                Dim oItemType = oRow.Item("ITEM_TYPE")
                Dim oEN16931_ID = oRow.Item("EN16931_ID")

                Args.PropertyMapList.Add(New XmlItemProperty() With {
                    .XMLPath = xmlPath,
                    .Description = description,
                    .TableName = tableName,
                    .TableColumn = tableColumn,
                    .IsRequired = isRequired,
                    .IsGrouped = isGrouped,
                    .GroupScope = groupScope,
                    .Specification = specification,
                    .ItemType = oItemType,
                    .EN16931_ID = oEN16931_ID
                })
            Next

            Return Args
        Catch ex As Exception
            _logger.Error(ex)
            Return Args
        End Try
    End Function

End Class