Imports System.ComponentModel
Imports System.Threading.Tasks
Imports DevExpress.XtraBars.Docking
Imports DevExpress.XtraSplashScreen
Imports DigitalData.Modules.Logging
Imports EnvelopeGenerator.Common

Partial Public Class frmEnvelopeEditor
    Public Property Envelope As Envelope
    Public Property Documents As New BindingList(Of EnvelopeDocument)
    Public Property Receivers As New BindingList(Of EnvelopeReceiver)

    Private Controller As EnvelopeEditorController
    Private Logger As Logger

    Public Property State As State

    Public Sub New()
        InitializeComponent()
    End Sub

    Private Sub btnNewFile_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnNewFile.ItemClick
        If OpenFileDialog1.ShowDialog() = DialogResult.OK Then
            Dim oDocument = Controller.CreateDocument(OpenFileDialog1.FileName)

            If oDocument IsNot Nothing Then
                Documents.Add(oDocument)
            Else
                MsgBox("Dokument konnte nicht gespeichert werden!", MsgBoxStyle.Critical, Text)
            End If
        End If
    End Sub

    Private Sub frmEditor_Load(sender As Object, e As EventArgs) Handles Me.Load
        Logger = State.LogConfig.GetLogger()

        If Envelope Is Nothing Then
            Controller = New EnvelopeEditorController(State)
        Else
            Controller = New EnvelopeEditorController(State, Envelope)
            Documents = New BindingList(Of EnvelopeDocument)(Controller.Envelope.Documents)
            Receivers = New BindingList(Of EnvelopeReceiver)(Controller.Envelope.Receivers)
            txtMessage.EditValue = Controller.Envelope.Message
            txtSubject.EditValue = Controller.Envelope.Subject

            If Envelope.Status = Constants.EnvelopeStatus.Sent Then
                SetFormReadonly()
            End If
        End If

        GridDocuments.DataSource = Documents
        GridReceivers.DataSource = Receivers
    End Sub

    Private Sub SetFormReadonly()
        RibbonPageGroup1.Enabled = False
        RibbonPageGroup2.Enabled = False
        RibbonPageGroup3.Enabled = False
        RibbonPageGroup5.Enabled = False
        btnEditFields.Enabled = False
        txtSubject.Properties.ReadOnly = True
        txtMessage.Properties.ReadOnly = True
        ViewReceivers.OptionsBehavior.ReadOnly = True
        ViewDocuments.OptionsBehavior.ReadOnly = True
    End Sub

    Private Sub frmEnvelopeEditor_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
        Controller.CleanupEnvelope()
    End Sub

    Private Sub btnDeleteFile_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnDeleteFile.ItemClick
        If ViewDocuments.GetSelectedRows().Count > 0 Then
            Dim oDocument As EnvelopeDocument = DirectCast(ViewDocuments.GetFocusedRow(), EnvelopeDocument)
            If Controller.DeleteDocument(oDocument) Then
                Documents.Remove(oDocument)
            End If
        End If
    End Sub

    Private Sub btnSave_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnSave.ItemClick
        Try
            If SaveEnvelope() Then

            End If
        Catch ex As Exception
            Logger.Error(ex)
        End Try
    End Sub

    Private Sub btnEditFields_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnEditFields.ItemClick
        Dim oHandle = SplashScreenManager.ShowOverlayForm(Me)

        Try
            If ViewDocuments.GetSelectedRows().Count > 0 Then
                Dim oDocument As EnvelopeDocument = DirectCast(ViewDocuments.GetFocusedRow(), EnvelopeDocument)
                Dim oGDPictureKey As String = "21182889975216572111813147150675976632"

                If SaveEnvelope() Then
                    Dim oForm As New frmFieldEditor() With {
                        .Document = Controller.Envelope.Documents.
                            Where(Function(d) d.Filename = oDocument.Filename).
                            SingleOrDefault(),
                        .GDPictureKey = oGDPictureKey,
                        .Receivers = Receivers.ToList,
                        .State = State
                    }
                    oForm.ShowDialog()
                End If
            End If
        Catch ex As Exception
            Logger.Error(ex)
        Finally
            SplashScreenManager.CloseOverlayForm(oHandle)
        End Try
    End Sub

    Private Function SaveEnvelope() As Boolean
        Dim oSubject = txtSubject.EditValue?.ToString
        Dim oMessage = txtMessage.EditValue?.ToString

        ' Ensure all receivers are saved
        ViewReceivers.CloseEditor()

        Dim oEnvelope = Controller.Envelope
        oEnvelope.Subject = oSubject
        oEnvelope.Message = oMessage
        oEnvelope.Receivers = Receivers.ToList
        oEnvelope.Documents = Documents.ToList

        Dim oErrors = oEnvelope.Validate()
        If oErrors.Any Then
            ShowValidationErrors("Fehler beim Speichern des Umschlags: ", oErrors)
            Return False
        End If

        If Controller.CreateEnvelopeReceivers(oEnvelope.Receivers) = False Then
            MsgBox("Fehler beim Speichern der Empfänger!", MsgBoxStyle.Critical, Text)
            Return False
        End If

        If Controller.SaveEnvelope() = False Then
            MsgBox("Fehler beim Speichern des Umschlags!", MsgBoxStyle.Critical, Text)
            Return False
        Else
            Return True
        End If
    End Function

    Private Sub ShowValidationErrors(pErrorTitle As String, pErrors As List(Of String))
        Dim oError = pErrorTitle & vbNewLine & vbNewLine & String.Join(vbNewLine, pErrors)
        MsgBox(oError, MsgBoxStyle.Exclamation, Text)
    End Sub

    Private Sub btnDeleteReceiver_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnDeleteReceiver.ItemClick
        If ViewReceivers.SelectedRowsCount = 0 Then
            Exit Sub
        End If

        Dim oReceiver As EnvelopeReceiver = ViewReceivers.GetFocusedRow()

        If oReceiver Is Nothing Then
            Exit Sub
        End If

        Dim oMessage = "Wollen Sie den ausgewählten Empfänger löschen?"
        If Controller.ElementsExist(oReceiver.Id) Then
            oMessage = "Es gibt für diesen Empfänger bereits Elemente. Wollen Sie den Empfänger trotzdem löschen?"
        End If

        If MsgBox(oMessage, MsgBoxStyle.Question Or MsgBoxStyle.YesNo, Text) = MsgBoxResult.No Then
            Exit Sub
        End If

        If Controller.DeleteReceiver(oReceiver) Then
            Receivers.Remove(oReceiver)
        Else
            MsgBox("Empfänger konnte nicht entfernt werden.", MsgBoxStyle.Critical, Text)
        End If

    End Sub

    Private Sub btnSendEnvelope_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnSendEnvelope.ItemClick
        If SaveEnvelope() = False Then
            Exit Sub
        End If

        Dim oErrors = Controller.ValidateEnvelopeForSending()
        If oErrors.Any() Then
            ShowValidationErrors("Fehler beim Senden des Umschlags: ", oErrors)
            Exit Sub
        End If

        If Controller.SendEnvelope() = False Then
            MsgBox("Umschlag konnte nicht gesendet werden!", MsgBoxStyle.Critical, Text)
        End If
    End Sub

    Private Sub btnCancel_ItemClick(sender As Object, e As DevExpress.XtraBars.ItemClickEventArgs) Handles btnCancel.ItemClick

    End Sub
End Class