#Region "Includes"

Imports System.Data.SqlClient
Imports Common.Common
Imports System.Runtime.InteropServices

#End Region

'Class used 4 common Logging
<ClassInterface(ClassInterfaceType.AutoDual)> _
Public Class Logging

#Region "Members"

	Dim m_JournalId As Integer
	Dim m_JobId As Integer
	Dim m_ProgrammId As Integer
    Dim m_DbConnection As SqlConnection
    Dim m_Common As Common.Common
    Dim m_JobTyp As JobType
	Dim m_IsNachLetzterAusfuerung As Boolean
	Dim m_RunJob As Boolean

#End Region

#Region "Constructor"

	'Gets a new JournalId for a new logging instance
	'TODO: jobtype muss nicht bekannt sein, wenn ein tool als start UND watch läuft...
	'Wird aber benötigt, um LastRunEnde auf Job zu setzen. Dies wiederum wird in GetFailedStartJobs
	'verwendet um zu überprüfen, ob der JOB(und ebe  nicht das programm) gestartet wurde
    Public Sub New(ByVal programId As Integer, ByVal jobType As JobType)
        Try
            Dim sqlCom As New SqlCommand
            Dim da As New SqlDataAdapter
            Dim ds As New DataSet

            m_ProgrammId = programId
            m_Common = New Common.Common

            m_DbConnection = New SqlConnection(m_Common.DSN)
            m_DbConnection.Open()

            sqlCom.CommandType = CommandType.StoredProcedure
            sqlCom.Connection = m_DbConnection
            sqlCom.CommandText = "CreateJournal"

            sqlCom.Parameters.Add(New SqlParameter("@ProgrammId", m_ProgrammId))
            sqlCom.Parameters.Add(New SqlParameter("@JobTypId", jobType))

            da.SelectCommand = sqlCom
            da.Fill(ds)

            'One table and one row are required
            If ds.Tables.Count > 0 Then
                If ds.Tables(0).Rows.Count > 0 Then
                    m_JournalId = ds.Tables(0).Rows(0).Item("JournalId")
                    m_JobId = ds.Tables(0).Rows(0).Item("JobId")
                    m_IsNachLetzterAusfuerung = ds.Tables(0).Rows(0).Item("NachLetzterAusfuerung")
                    m_RunJob = ds.Tables(0).Rows(0)("RunJob")
                Else
                    Throw New Exception("Neues Journal konnte nicht erzeugt werden oder zugehöriger Job wurde nicht gefunden")
                End If
            Else
                Throw New Exception("Neues Journal konnte nicht erzeugt werden oder zugehöriger Job wurde nicht gefunden")
            End If

            If jobType = jobType.WatchJob Then
                'needed for validating correct start and maximal durations
                DataAccess.Job.SetJobLastRun(m_Common.DSN, m_JobId, LastRun.Start)
                m_Common.Log(Common.Common.DLL_DISPLAY_NAME, "DLL Library setted LastRunStart to " + DateTime.Now.ToString("G") + " for JobId " + m_JobId.ToString)
            End If


            m_DbConnection.Close()

        Catch ex As Exception
            If m_DbConnection.State = ConnectionState.Open Then
                m_DbConnection.Close()
            End If
            WriteEventLog(ex.Source, ex.Message, EventLogEntryType.Error)
        End Try
    End Sub

#End Region

#Region "Public Methods"

		'Note: This Sub is necessary, because VB cannot handle constructors with parameters
		'so we have to do all the "constuctor" stuff in a method...
		'Public Sub InitLogging(ByVal programId As Integer, ByVal jobTyp As Integer)
		'End Sub

	'Writes a message with a journalEntryType to the journal
    Public Sub Log(ByVal message As String, ByVal journalEintragTyp As JournalEntryType)
        Try
            WriteJournalEntry(message, CType(journalEintragTyp, JournalEntryType))

            'in an error case, service should do something
            If journalEintragTyp = JournalEntryType.Error Then
                Dim ds As New DataSet
                DataAccess.Job.GetNotifications(m_Common, m_ProgrammId, ds)
                DataAccess.Job.SendNotification(m_Common, m_ProgrammId, ds, message, m_JobId, JobType.WatchJob)
            End If
        Catch ex As Exception
            WriteEventLog(ex.Source, ex.Message, EventLogEntryType.Error)
        End Try
    End Sub

	'Writes a message to the journal
	Public Sub Log(ByVal message As String)
		Try
            Log(message, JournalEntryType.Information)
		Catch ex As Exception
			WriteEventLog(ex.Source, ex.Message, EventLogEntryType.Error)
		End Try
	End Sub

	'Writes to journal, that the program has started
	Public Sub Start()
		Try
			DataAccess.Job.SetIsRunning(m_Common.DSN, m_ProgrammId, True)
			WriteJournalEntry("Start", JournalEntryType.Information)
		Catch ex As Exception
			DataAccess.Job.SetIsRunning(m_Common.DSN, m_ProgrammId, False)
			WriteEventLog(ex.Source, ex.Message, EventLogEntryType.Error)
		End Try
	End Sub

	'Writes to journal, that the program has ended
	Public Sub Ende()
		Try
			DataAccess.Job.SetIsRunning(m_Common.DSN, m_ProgrammId, False)
			DataAccess.Job.SetJobLastRun(m_Common.DSN, m_JobId, LastRun.End)

			'calc next start time JUST if its a "NachLetzterAusfuerung" Job
			If m_IsNachLetzterAusfuerung Then
				DataAccess.Job.SetNextExecDateTime(m_Common.DSN, m_JobId)
			End If
			WriteJournalEntry("Ende", JournalEntryType.Information)
		Catch ex As Exception
			WriteEventLog(ex.Source, ex.Message, EventLogEntryType.Error)
		End Try
	End Sub

#End Region

#Region "Private Methods"

	'Writes an nice formatted error message to windows eventlog
	Private Sub WriteEventLog(ByVal source As String, ByVal errorMessage As String, ByVal eventLogType As EventLogEntryType)
		m_Common.Log(source, "Quelle: " & source & Environment.NewLine & "Meldung: " & errorMessage, eventLogType)
	End Sub

	'Writes an entry to the BMS journal
    Private Sub WriteJournalEntry(ByVal message As String, ByVal journalEntryType As JournalEntryType)
        Try
            Dim sqlCom As New SqlCommand

            m_DbConnection.Open()

            sqlCom.CommandType = CommandType.StoredProcedure
            sqlCom.Connection = m_DbConnection
            sqlCom.CommandText = "CreateJournalEntry"

            sqlCom.Parameters.Add(New SqlParameter("@JournalId", m_JournalId))
            sqlCom.Parameters.Add(New SqlParameter("@EintragDesc", message))
            sqlCom.Parameters.Add(New SqlParameter("@JournalEintragTypId", CInt(journalEntryType)))
            sqlCom.ExecuteNonQuery()

            m_DbConnection.Close()
        Catch
            If m_DbConnection.State = ConnectionState.Open Then
                m_DbConnection.Close()
            End If
            Throw
        End Try
    End Sub

#End Region

End Class