Public Class frmMain
    Private _Logger As Logger
    Private _Database As Database

    Private Sub frmMain_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Try
            My.Application.LogConfig = New LogConfig(
                Suffix:=Environment.MachineName,
                LogPath:=LogConfig.PathType.CustomPath,
                CustomLogPath:=Application.StartupPath,
                CompanyName:="Digital Data",
                ProductName:="WinLineProductNumberGenerator"
            )
            My.Application.ConfigManager = New ConfigManager(Of Config)(
                My.Application.LogConfig,
                Application.StartupPath
            )
            _Logger = My.Application.LogConfig.GetLogger()
        Catch ex As Exception
            MsgBox("Fehler beim Initialisieren (Logging und Config):" & vbNewLine & ex.Message, MsgBoxStyle.Critical, Text)
        End Try

        Dim oLogConfig = My.Application.LogConfig
        Dim oConfigManager = My.Application.ConfigManager
        Dim oConfig As Config = oConfigManager.Config

        If oConfig.EXIMConnectionString = String.Empty Then
            MsgBox("ConnectionString zur EXIM Datenbank ist nicht hinterlegt!", MsgBoxStyle.Critical, Text)
            Application.Exit()
        End If

        If oConfig.WinlineConnectionString = String.Empty Then
            MsgBox("ConnectionString zur Winline Datenbank ist nicht hinterlegt!", MsgBoxStyle.Critical, Text)
            Application.Exit()
        End If

        Try
            My.Application.EXIMDatabase = New Database(
            oLogConfig,
            oConfigManager,
            oConfigManager.Config.EXIMConnectionString)

            My.Application.WinlineDatabase = New Database(
                oLogConfig,
                oConfigManager,
                oConfigManager.Config.WinlineConnectionString)

            My.Application.Winline = New Winline(
                oLogConfig,
                My.Application.EXIMDatabase,
                My.Application.WinlineDatabase,
                oConfigManager.Config)

            Dim oVendors = My.Application.Winline.GetVendors()
            listboxVendors.DataSource = oVendors

            _Logger.Info("Application started from Machine {0}", Environment.MachineName)
        Catch ex As Exception
            MsgBox("Fehler beim Initialisieren (Datenbank):" & vbNewLine & ex.Message, MsgBoxStyle.Critical, Text)
            _Logger.Error(ex)
        End Try
    End Sub

    Private Sub frmMain_FormClosed(sender As Object, e As FormClosedEventArgs) Handles Me.FormClosed
        My.Application.ConfigManager.Save()
    End Sub

    Private Sub listboxVendors_SelectedIndexChanged(sender As Object, e As EventArgs) Handles listboxVendors.SelectedIndexChanged
        If listboxVendors.SelectedItem IsNot Nothing Then
            Dim oVendor As Vendor = listboxVendors.SelectedItem
            Dim oGroups As List(Of ProductGroup) = My.Application.Winline.GetGroupsByVendor(oVendor.Code)

            listboxProductGroups.DataSource = oGroups
        End If

    End Sub

    Private Sub listboxProductGroups_SelectedIndexChanged(sender As Object, e As EventArgs) Handles listboxProductGroups.SelectedIndexChanged
        If listboxProductGroups.SelectedItem IsNot Nothing Then
            Dim oGroup As ProductGroup = listboxProductGroups.SelectedItem
            Dim oVersions As List(Of ProductVersion) = My.Application.Winline.GetVersionsByVendorAndGroup(oGroup.Code, oGroup.GroupId)

            listBoxProductVersion.DataSource = oVersions
        End If
    End Sub

    Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
        Dim oVendor As Vendor = listboxVendors.SelectedItem()
        Dim oGroup As ProductGroup = listboxProductGroups.SelectedItem()
        Dim oVersion As ProductVersion = listBoxProductVersion.SelectedItem()

        If oVendor Is Nothing Then
            MsgBox("Bitte einen Lieferanten auswählen!", MsgBoxStyle.Information, Text)
            Exit Sub
        End If

        If oGroup Is Nothing Then
            MsgBox("Bitte eine Produkt-Gruppe auswählen!", MsgBoxStyle.Information, Text)
            Exit Sub
        End If

        If oVersion Is Nothing Then
            MsgBox("Bitte eine Produkt-Version auswählen!", MsgBoxStyle.Information, Text)
            Exit Sub
        End If

        Dim oArticleNumber = $"{oVendor.Code}{oGroup.GroupString}{oVersion.VersionString}"
        Dim oRunningNumber As String

        _Logger.Info("Vendor Code: [{0}]", oVendor.Code)
        _Logger.Info("Group String: [{0}]", oGroup.GroupString)
        _Logger.Info("Version: [{0}]", oVersion.VersionString)

        Try
            oRunningNumber = My.Application.Winline.GetNextRunningNumber(oVendor.Code, oGroup.GroupId, oVersion.VersionId)

            _Logger.Info("New Running Number: [{0}]", oRunningNumber)

            If My.Application.Winline.TestArticleExists($"{oArticleNumber}{oRunningNumber}") Then
                Throw New ApplicationException(My.Application.Winline.ARTICLE_ALREADY_EXISTS)
            End If

            Dim oForm As New frmCreateArticle() With {
                .ArticleNumber = oArticleNumber,
                .RunningNumber = oRunningNumber,
                .Vendor = oVendor,
                .Version = oVersion,
                .Group = oGroup
            }

            _Logger.Info("Opening Article form..")

            oForm.ShowDialog()
        Catch ex As Exception
            _Logger.Error(ex)

            Dim oMessage As String = ""

            Select Case ex.Message
                Case My.Application.Winline.NO_RUNNING_NUMBER_FOUND
                    oMessage = ""
                    oMessage &= $"Für die Artikelnummer [{oArticleNumber}] wurde im WinLine-System keine Laufende Nummer hinterlegt."
                    oMessage &= "Diese Nummer ist für die Automatische Artikelnummer-Generierung zwingend notwendig"
                Case My.Application.Winline.ARTICLE_ALREADY_EXISTS
                    oMessage = ""
                    oMessage &= $"Der Artikel [{oArticleNumber}{oRunningNumber}] existiert bereits und wird deshalb nicht angelegt." & vbNewLine
                    oMessage &= $"Prüfen Sie, ob die Laufenden Nummern für diese Artikelversion hinterlegt korrekt hinterlegt."
                Case Else
                    oMessage = ""
                    oMessage &= "Folgender Fehler ist aufgetreten:" & vbNewLine & vbNewLine & ex.Message
            End Select

            MsgBox(oMessage, MsgBoxStyle.Critical, Text)
        End Try
    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        Dim oResult As DialogResult = frmNewVendor.ShowDialog()

        If oResult = DialogResult.OK Then
            Dim oVendors = My.Application.Winline.GetVendors()
            listboxVendors.DataSource = oVendors
        End If
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim oForm As New frmNewGroup() With {
            .Vendor = listboxVendors.SelectedItem
        }

        If oForm.ShowDialog = DialogResult.OK Then
            'reload groups?
        End If
    End Sub

    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        Dim oForm As New frmNewProduct() With {
            .Vendor = listboxVendors.SelectedItem,
            .Group = listboxProductGroups.SelectedItem
        }

        If oForm.ShowDialog = DialogResult.OK Then
            'reload products?
        End If
    End Sub
End Class