Imports System.ComponentModel
Imports System.IO
Imports System.Net.Http
Imports System.Xml
Imports DevExpress.Utils.Behaviors.Common
Imports DevExpress.XtraGrid
Imports DevExpress.XtraGrid.Views.Grid
Imports DigitalData.Controls.SQLConfig
Imports DigitalData.GUIs.Common
Imports DigitalData.Modules.Config
Imports DigitalData.Modules.Database
Imports DigitalData.Modules.Logging
Imports MultiTool.Shared
Imports MultiTool.Shared.Documents
Imports MultiTool.Shared.Schemas
Imports MultiTool.Shared.Winline

Public Class frmImportMain
    Private LogConfig As LogConfig
    Private Logger As Logger
    Private ConfigManager As ConfigManager(Of Config)
    Private Database As MSSQLServer
    Private Winline As Data
    Private FileEx As DigitalData.Modules.Filesystem.File
    Private WebService As WebService
    Private DocumentLoader As DocumentLoader
    Private SchemaLoader As SchemaLoader
    Private FormHelper As FormHelper

    Private Grids As List(Of GridControl)
    Private GridLoader As GridLoader
    Private GridBuilder As GridBuilder

    Private CurrentSchemaName As String = Nothing
    Private CurrentSchema As Schema = Nothing
    Private CurrentGrid As GridControl = Nothing
    Private CurrentDocument As Document = Nothing

    Public Sub New()
        InitializeComponent()
        BehaviorManager.Attach(Of PersistenceBehavior)(Me, AddressOf LoadPersistenceSettings)
    End Sub

    Protected Overrides Sub OnLoad(e As EventArgs)
        GridControlFiles.ForceInitialize()
        MyBase.OnLoad(e)
    End Sub

    Private Sub LoadPersistenceSettings(pBehaviour As PersistenceBehavior)
        pBehaviour.Properties.StoreChildLayouts = DevExpress.Utils.DefaultBoolean.True
        pBehaviour.Properties.Storage = Storage.File
        pBehaviour.Properties.Path = Application.UserAppDataPath
    End Sub

    Private Sub frmImportMain_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Try
            txtVersion.Caption = String.Format(txtVersion.Caption, Application.ProductVersion)

            LogConfig = New LogConfig(LogConfig.PathType.AppData, Nothing, Nothing, Application.CompanyName, Application.ProductName)
            Logger = LogConfig.GetLogger()
            Logger.Info("Starting {0}, Version [{1}]", Application.ProductName, Application.ProductVersion)

            ConfigManager = New ConfigManager(Of Config)(LogConfig,
                Application.UserAppDataPath,
                Application.CommonAppDataPath,
                Application.StartupPath
            )

            FormHelper = New FormHelper(LogConfig)

            GridBuilder = New GridBuilder(GridViewFiles)
            GridBuilder.WithDefaults.WithClipboardHandler()
            GridViewFiles.OptionsView.ShowAutoFilterRow = False

            FileEx = New DigitalData.Modules.Filesystem.File(LogConfig)

            ' If ConnectionString does not exist, show SQL Config Form
            If ConfigManager.Config.ConnectionString = String.Empty Then
                Dim oForm As New frmSQLConfig(LogConfig) With {
                    .FormTitle = Application.ProductName
                }
                Dim oResult = oForm.ShowDialog()

                If oResult = DialogResult.OK Then
                    ConfigManager.Config.ConnectionString = oForm.ConnectionString
                    ConfigManager.Save()
                End If
            End If

            ' Initialize Database
            Dim oConnectionString = MSSQLServer.DecryptConnectionString(ConfigManager.Config.ConnectionString)
            Database = New MSSQLServer(LogConfig, oConnectionString)
            Winline = New Data(LogConfig, Database, ConfigManager.Config)
            WebService = New WebService(LogConfig, ConfigManager.Config, Application.UserAppDataPath)
            AddHandler WebService.WebServiceProgress, AddressOf WebService_Progress
        Catch ex As Exception
            FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Initialisieren_der_Anwendungs_Daten)
        End Try

        txtVersion.Caption = String.Format(txtVersion.Tag.ToString, My.Application.Info.Version.ToString)
        txtCulture.Caption = String.Format(txtCulture.Tag.ToString, My.Application.UICulture.ToString)
    End Sub

    Private Async Sub frmImportMain_Shown(sender As Object, e As EventArgs) Handles MyBase.Shown
        btnLoadFiles.Enabled = False
        SplashScreenManager.ShowWaitForm()

        ' Load WinLine Data
        Try
            Winline.Mandators.Clear()
            Winline.LoadEconomicYears()
            Await Winline.LoadMandators()

            ' TODO: Comment in when we finally use the database for additional configuration
            'Winline.LoadTemplateConfiguration()

            For Each oMandator As Mandator In Winline.Mandators
                SplashScreenManager.SetWaitFormDescription(String.Format(My.Resources.frmImportMainExtra.Lade__0__Konten, oMandator.Id))
                Await Winline.LoadAccounts(oMandator)
                SplashScreenManager.SetWaitFormDescription(String.Format(My.Resources.frmImportMainExtra.Lade__0__Artikel, oMandator.Id))
                Await Winline.LoadArticles(oMandator)
                SplashScreenManager.SetWaitFormDescription(String.Format(My.Resources.frmImportMainExtra.Lade__0__Belegarten, oMandator.Id))
                Await Winline.LoadDocumentKinds(oMandator)
            Next

            SplashScreenManager.SetWaitFormDescription(My.Resources.frmImportMainExtra.Lade_Oberfläche)

            lookupMandator.Properties.DataSource = Winline.Mandators
            lookupMandator.ForceInitialize()
            lookupMandator.Properties.View.BestFitColumns()

            DocumentLoader = New DocumentLoader(LogConfig, Winline)
            SchemaLoader = New SchemaLoader(LogConfig)
            GridLoader = New GridLoader(LogConfig)

            SplashScreenManager.SetWaitFormDescription(My.Resources.frmImportMainExtra.Lade_Vorlagen)

            SchemaLoader.LoadFiles(ConfigManager.Config.SchemaDirectory)
            CurrentSchemaName = SchemaLoader.SchemaList.First().FullName
            CurrentSchema = SchemaLoader.GetSchemaFromFile(CurrentSchemaName)

            Grids = CreateGridsAndColumns(CurrentSchema)

            For Each oGrid As GridControl In Grids
                AddHandler oGrid.GotFocus, AddressOf Grid_Focus
            Next
        Catch ex As Exception
            FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Laden_der_Winline_Daten)
        Finally
            SplashScreenManager.CloseWaitForm()
            btnLoadFiles.Enabled = True
        End Try
    End Sub

    Private Sub Grid_Focus(sender As GridControl, e As EventArgs)
        CurrentGrid = sender
    End Sub

    Private Function CreateGridsAndColumns(pSchema As Schemas.Schema) As List(Of GridControl)
        Dim oGrids As New List(Of GridControl)
        Dim oTableCounter = 0

        For Each oTable In pSchema.Tables
            If oTableCounter = 0 Then
                Dim oGrid = GridLoader.GetGridFromElement(GridControl1, oTable)
                AddHandler oGrid.DoubleClick, AddressOf Grid_MouseDoubleClick
                oGrids.Add(oGrid)
            End If

            If oTableCounter = 1 Then
                Dim oGrid = GridLoader.GetGridFromElement(GridControl2, oTable)
                AddHandler oGrid.DoubleClick, AddressOf Grid_MouseDoubleClick
                oGrids.Add(oGrid)
            End If

            If oTableCounter = 2 Then
                Dim oGrid = GridLoader.GetGridFromElement(GridControl3, oTable)
                AddHandler oGrid.DoubleClick, AddressOf Grid_MouseDoubleClick
                oGrids.Add(oGrid)
            End If

            If oTableCounter = 3 Then
                Dim oGrid = GridLoader.GetGridFromElement(GridControl4, oTable)
                AddHandler oGrid.DoubleClick, AddressOf Grid_MouseDoubleClick
                oGrids.Add(oGrid)
            End If

            If oTableCounter > 3 Then
                MsgBox(My.Resources.frmImportMainExtra.Zur_Zeit_werden_nur_bis_zu_4_Tabellen_unterstützt_, MsgBoxStyle.Exclamation, Text)
            End If

            oTableCounter += 1
        Next

        If oTableCounter < 3 Then
            SplitContainerGrids.PanelVisibility = DevExpress.XtraEditors.SplitPanelVisibility.Panel1
        End If

        Return oGrids
    End Function

    Private Sub Grid_MouseDoubleClick(sender As Object, e As MouseEventArgs) Handles GridControlFiles.MouseDoubleClick
        Try
            Dim oGrid As GridControl = DirectCast(sender, GridControl)
            Dim oView As GridView = DirectCast(oGrid.FocusedView, GridView)
            Dim oHitInfo = oView.CalcHitInfo(e.Location)

            If Not oHitInfo.InDataRow Then
                Exit Sub
            End If

            Dim oRow As DataRow = oView.GetDataRow(oView.FocusedRowHandle)
            Dim oColumns = oView.Columns.Select(Function(c) c.FieldName).ToList()
            Dim oDocumentRow = CurrentDocument.Rows.
                Where(Function(r) r.Id.ToString = oRow.Item("GUID")).
                SingleOrDefault()

            Dim oForm As New frmRowEditor(LogConfig, oColumns, oDocumentRow, CurrentDocument.Mandator, Winline)
            If oForm.ShowDialog() = DialogResult.OK Then
                Dim oModifiedRow = oForm.DocumentRow
                Dim oIndex = CurrentDocument.Rows.IndexOf(oModifiedRow)

                CurrentDocument.Rows.Item(oIndex) = oModifiedRow
                LoadDocument(CurrentDocument)
            End If
        Catch ex As Exception
            FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Laden_der_Detailzeilen)

        End Try
    End Sub

    Private Sub btnLoadFiles_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnLoadFiles.ItemClick
        Try
            SplitContainerGrids.Enabled = False

            If DocumentLoader.LoadFiles(ConfigManager.Config.InputDirectory, CurrentSchema, lookupMandator.EditValue) Then
                GridControlFiles.DataSource = Nothing
                GridControlFiles.DataSource = DocumentLoader.Files

                txtFilesLoaded.Caption = String.Format(txtFilesLoaded.Tag.ToString, DocumentLoader.Files.Count)
            End If
        Catch ex As Exceptions.NoMandatorException
            MsgBox(My.Resources.frmImportMainExtra.Es_konnte_kein_passender_Mandant_ermittelt_werden, MsgBoxStyle.Information, Text)

        Catch ex As Exception
            FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Laden_der_Detailzeilen)

        Finally
            SplitContainerGrids.Enabled = True
        End Try
    End Sub

    Private Sub btnReloadFile_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnReloadFile.ItemClick
        Dim oCurrentMandator As Mandator = TryCast(lookupMandator.EditValue, Mandator)
        If oCurrentMandator Is Nothing Then
            MsgBox(My.Resources.frmImportMainExtra.Bitte_wählen_Sie_einen_Mandanten_aus__bevor_Sie_fortfahren, MsgBoxStyle.Exclamation, Text)
            Exit Sub
        End If

        Dim oMessage = String.Format(My.Resources.frmImportMainExtra.Wollen_Sie_wirklich_die_aktuelle_Datei_neu_laden, oCurrentMandator)
        Dim oResult As DialogResult = MsgBox(oMessage, MsgBoxStyle.Question Or MsgBoxStyle.YesNo, Text)

        Try
            If oResult = DialogResult.Yes Then
                Dim oDocument As Document = GridViewFiles.GetRow(GridViewFiles.FocusedRowHandle)

                Dim oNewDocument = DocumentLoader.LoadFile(oDocument.File, CurrentSchema, lookupMandator.EditValue)
                Dim oIndex = DocumentLoader.Files.IndexOf(oDocument)
                DocumentLoader.Files.Item(oIndex) = oNewDocument

                LoadDocument(oNewDocument)
            End If

        Catch ex As Exceptions.NoMandatorException
            MsgBox(My.Resources.frmImportMainExtra.Es_konnte_kein_passender_Mandant_ermittelt_werden, MsgBoxStyle.Information, Text)

        Catch ex As Exception
            FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Neuladen_des_Dokuments)

        End Try
    End Sub

    Private Sub GridViewFiles_FocusedRowChanged(sender As Object, e As Views.Base.FocusedRowChangedEventArgs) Handles GridViewFiles.FocusedRowChanged
        Try
            Dim oDocument As Document = GridViewFiles.GetRow(e.FocusedRowHandle)

            If oDocument Is Nothing Then
                Exit Sub
            End If

            lookupMandator.EditValue = oDocument.Mandator
            LoadDocument(oDocument)
        Catch ex As Exception
            FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Laden_des_Dokuments)
        End Try
    End Sub

    Private Sub LoadDocument(pDocument As Document)
        Try
            Dim oDatasources As New Dictionary(Of String, DataTable)

            For Each oGrid In Grids
                oGrid.DataSource = Nothing
            Next

            ' List of Root Elements in XML
            For Each oRow In pDocument.Rows
                Dim oGrid As GridControl = Grids.
                    Where(Function(g) g.Name = oRow.Name).
                    SingleOrDefault()

                ' Create initial Datatable if none exists for this Root Element
                If Not oDatasources.ContainsKey(oRow.Name) Then
                    Dim oTable As New DataTable()

                    oTable.Columns.Add(New DataColumn("GUID"))

                    For Each oField In oRow.Fields
                        oTable.Columns.Add(New DataColumn(oField.Key))
                    Next

                    oDatasources.Add(oRow.Name, oTable)

                    oGrid.DataSource = Nothing
                    oGrid.DataSource = oTable
                End If

                Dim oDataTable = oDatasources.Item(oRow.Name)
                Dim oDataRow = oDataTable.NewRow()

                oDataRow.Item("GUID") = oRow.Id.ToString

                For Each oField In oRow.Fields
                    oDataRow.Item(oField.Key) = oField.Value
                Next

                oDataTable.Rows.Add(oDataRow)
                oDataTable.AcceptChanges()
            Next

            txtCurrentFile.Caption = String.Format(txtCurrentFile.Tag.ToString, pDocument.Name)

            CurrentDocument = pDocument
            SetDocumentButtonsEnabled(True)
        Catch ex As Exception
            SetDocumentButtonsEnabled(False)
            Logger.Error(ex)
            Throw ex
        End Try
    End Sub

    Private Sub SetDocumentButtonsEnabled(pEnabled As Boolean)
        btnShowXml.Enabled = pEnabled
        btnReloadFile.Enabled = pEnabled
        btnTransferFile.Enabled = pEnabled
        ' TODO: Implement all file transfer first
        ' btnTransferAllFiles.Enabled = pEnabled
    End Sub


    Private Async Sub btnTransferFile_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnTransferFile.ItemClick
        Try
            SplashScreenManager.ShowWaitForm()
            SetDocumentButtonsEnabled(False)
            GridControlFiles.Enabled = False
            btnLoadFiles.Enabled = False
            SplitContainerGrids.Enabled = False

            Dim oDocument As Document = GridViewFiles.GetRow(GridViewFiles.FocusedRowHandle)
            Await WebService.TransferDocumentToWinline(oDocument)

            MsgBox(My.Resources.frmImportMainExtra.Datei_erfolgreich_in_die_WinLine_übertragen, MsgBoxStyle.Information, Text)
        Catch ex As HttpRequestException
            FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Übertragung_zur_WinLine, My.Resources.frmImportMainExtra.Die_Verbindung_zum_WinLine_Server_ist_fehlgeschlagen)

        Catch ex As Exception
            FormHelper.ShowError(ex, My.Resources.frmImportMainExtra.Übertragung_zur_WinLine)

        Finally
            SplitContainerGrids.Enabled = True
            btnLoadFiles.Enabled = True
            GridControlFiles.Enabled = True
            SetDocumentButtonsEnabled(True)
            SplashScreenManager.CloseWaitForm()
        End Try
    End Sub

    Private Sub WebService_Progress(sender As Object, e As String)
        SplashScreenManager.SetWaitFormDescription(e)
    End Sub

    Private Sub btnOpenInputDirectory_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnOpenInputDirectory.ItemClick
        TryOpenDirectory(ConfigManager.Config.InputDirectory, My.Resources.frmImportMainExtra.Eingangsverzeichnis)
    End Sub

    Private Sub btnOpenOutputDirectory_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnOpenOutputDirectory.ItemClick
        Dim oOutputDirectory = Path.Combine(Application.UserAppDataPath, "WebService")
        TryOpenDirectory(oOutputDirectory, My.Resources.frmImportMainExtra.Ausgabeverzeichnis)
    End Sub

    Private Sub btnOpenSchemaDirectory_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnOpenSchemaDirectory.ItemClick
        TryOpenDirectory(ConfigManager.Config.SchemaDirectory, My.Resources.frmImportMainExtra.Vorlagenverzeichnis)
    End Sub

    Private Sub TryOpenDirectory(pPath As String, pDisplayName As String)
        If Directory.Exists(pPath) Then
            Process.Start(pPath)
        Else
            Dim oMessage = String.Format(My.Resources.frmImportMainExtra._0__nicht_konfiguriert_oder_nicht_gefunden, pDisplayName)
            MsgBox(oMessage, MsgBoxStyle.Exclamation, Text)
        End If
    End Sub

    Private Sub TryOpenFile(pPath As String, pDisplayName As String)
        If File.Exists(pPath) Then
            Process.Start(pPath)
        Else
            Dim oMessage = String.Format(My.Resources.frmImportMainExtra._0__nicht_konfiguriert_oder_nicht_gefunden, pDisplayName)
            MsgBox(oMessage, MsgBoxStyle.Exclamation, Text)
        End If
    End Sub

    Private Sub btnOpenLogDirectory_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnOpenLogDirectory.ItemClick
        TryOpenDirectory(LogConfig.LogDirectory, My.Resources.frmImportMainExtra.Logverzeichnis)
    End Sub

    Private Sub btnOpenConfigDirectory_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnOpenConfigDirectory.ItemClick
        Dim oUserConfigDirectory = New FileInfo(ConfigManager.UserConfigPath).Directory
        TryOpenDirectory(oUserConfigDirectory.FullName, My.Resources.frmImportMainExtra.Konfigurationsverzeichnis)
    End Sub

    Private Sub btnShowXml_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnShowXml.ItemClick
        Dim oForm As New frmXmlEditor With {.FileName = CurrentDocument.FullName}
        oForm.Show()
    End Sub

    Private Sub txtCurrentFile_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles txtCurrentFile.ItemClick
        If CurrentDocument IsNot Nothing Then
            TryOpenFile(CurrentDocument.FullName, My.Resources.frmImportMainExtra.Aktuelle_Datei)
        End If
    End Sub

    Private Sub btnConfig_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnConfig.ItemClick
        Dim oForm As New frmConfig With {
            .ConfigManager = ConfigManager
        }

        oForm.ShowDialog()
    End Sub

    Private Sub btnRemoveRow_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnRemoveRow.ItemClick
        If CurrentGrid Is Nothing Then
            Exit Sub
        End If

        Dim oMessage As String = "Wollen Sie die ausgewählte Zeile wirklich löschen?"
        If MsgBox(oMessage, MsgBoxStyle.Question Or MsgBoxStyle.YesNo, Text) = MsgBoxResult.Yes Then
            ' Get GUID of currently selected row
            Dim oView As GridView = CurrentGrid.FocusedView
            Dim oRow As DataRowView = oView.GetRow(oView.FocusedRowHandle)
            Dim oGuid = oRow.Row.Item("GUID")

            ' Get currently selected document
            Dim oDocument As Document = GridViewFiles.GetRow(GridViewFiles.FocusedRowHandle)

            Dim oNewRows = oDocument.Rows.
                Where(Function(r) r.Id.ToString <> oGuid).
                ToList()
            oDocument.Rows = oNewRows

            Dim oIndex = DocumentLoader.Files.IndexOf(oDocument)
            DocumentLoader.Files.Item(oIndex) = oDocument

            lookupMandator.EditValue = oDocument.Mandator
            LoadDocument(oDocument)
        End If
    End Sub
End Class