Imports System.CodeDom
Imports DocumentFormat.OpenXml.Bibliography
Imports DocumentFormat.OpenXml.Drawing
Imports Org.BouncyCastle.Utilities
Imports SDL
Imports Therefore.API

Public Class frmRoutendauerBerechnen

    Public calculatedDate As New DateTime
    Dim SQL As New VERAG_PROG_ALLGEMEIN.SQL
    Dim destination As String = ""
    Dim departure As String
    Dim transportmittel As String = "LKW" 'Defaultvalue -> wird in Zukunft ev. noch erweitert (LKW, Sprinter, etc.)
    Dim days As Integer = -1
    Dim calcDays As Integer = -1
    Dim destinationShortcut As String = ""


    Sub New(dest As String)

        InitializeComponent()
        destination = dest

    End Sub


    Function findDestinationAndReplaceToShortCut(destination As String) As String

        Dim shortcut As String
        shortcut = CStr(SQL.DLookup("[grz_ZollamtDST]", "[tblGrenzstelle]", "[grz_Grenzstelle]= '" & destination & "'", "AVISO", ""))
        Return shortcut

    End Function

    Private Sub frmRoutendauerBerechnen_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        txtNach.Text = destination
        destinationShortcut = findDestinationAndReplaceToShortCut(destination)
        If destinationShortcut = "" Then
            initComboboxDeparture(destination)
        Else
            initComboboxDeparture(destinationShortcut)
        End If

        txbAbgangsdatum._value = ""

    End Sub

    Sub initComboboxDeparture(destination As String)

        cbxVon.Items.Clear()
        cbxVon.fillWithSQL("SELECT [nctsr_von], [nctsr_von_region] FROM [tblNTCSRouten] WHERE [nctsr_nach] = '" & destination & "'", False, "FMZOLL", False)
        cbxVon.Items.Add(New VERAG_PROG_ALLGEMEIN.MyListItem("", ""))
        cbxVon.changeItem("")
        If cbxVon._value = "" Then
            MsgBox("Es wurde für die Bestimmungszollstelle " & txtNach.Text & " keine Route definiert." & vbCrLf & "Bitte voraus. Datum des Eintreffens manuell eingeben")
        End If


    End Sub

    Private Sub btnPlus_Click(sender As Object, e As EventArgs) Handles btnPlus.Click
        If checkIfDepartureDateIsFilled() = False Then Exit Sub
        addDaysToGivenDate(txbVoraussichtlichesEintreffen, 1)
        calcDays += 1
        checkIfDepatureDateIsNotPast()
    End Sub

    Private Sub btnMinus_Click(sender As Object, e As EventArgs) Handles btnMinus.Click
        If checkIfDepartureDateIsFilled() = False Then Exit Sub
        addDaysToGivenDate(txbVoraussichtlichesEintreffen, -1)
        calcDays -= 1
        checkIfDepatureDateIsNotPast()
    End Sub

    Function lookUpTripDuration() As Integer

        Dim departure As String

        departure = cbxVon._value

        Try
            days = CInt(SQL.DLookup("nctsr_dauer_in_tagen", "tblNTCSRouten", "[nctsr_von]='" & departure & "' AND [nctsr_nach]= '" & destinationShortcut & "' AND [nctsr_route]= 'Landweg' AND [nctsr_transportmittel]= '" & transportmittel & "'", "VERAG", 0))
        Catch ex As Exception
            VERAG_PROG_ALLGEMEIN.cErrorHandler.ERR(ex.Message, ex.StackTrace, System.Reflection.MethodInfo.GetCurrentMethod.Name)
        End Try

        Return days

    End Function

    Private Sub addDaysToGivenDate(givenDate As VERAG_PROG_ALLGEMEIN.MyTextBox, days As Integer)

        txbVoraussichtlichesEintreffen._value = Convert.ToDateTime(givenDate._value).AddDays(days)
        txbVoraussichtlichesEintreffen.Show()

        lblberechneteDauer.Text = CStr(calcDuration())
        lblberechneteDauer.Visible = True


    End Sub


    Private Sub btnOK_Click(sender As Object, e As EventArgs) Handles btnOK.Click

        calculatedDate = CDate(txbVoraussichtlichesEintreffen._value)

    End Sub

    Private Sub btnCancel_Click(sender As Object, e As EventArgs) Handles btnCancel.Click
        Close()
    End Sub

    Private Sub txbAbgangsdatum_TextChanged(sender As Object, e As EventArgs) Handles txbAbgangsdatum.TextChanged, cbxVon.SelectedValueChanged

        If checkIfDepartureDateIsFilled() = False Then Exit Sub

        days = lookUpTripDuration()
        calcDays = days

        If days >= 0 Then
            addDaysToGivenDate(txbAbgangsdatum, days)
        End If

        checkIfDepatureDateIsNotPast()

    End Sub

    Function checkIfDepartureDateIsFilled() As Boolean

        Dim isFilled = False

        If txbAbgangsdatum._value = "" Then
            lblWarning.Visible = True
            lblDauer.Visible = False
            lblberechneteDauer.Text = ""
            lblberechneteDauer.Visible = False
            btnOK.DialogResult = DialogResult.None


        Else

            lblWarning.Visible = False
            isFilled = True
            lblDauer.Visible = True
            btnOK.DialogResult = DialogResult.OK




        End If

        Return isFilled

    End Function

    Function checkIfDepatureDateIsNotPast() As Boolean
        Dim depatureDateIsNotPast = False

        If txbVoraussichtlichesEintreffen._value <> "" Then
            If CDate(txbVoraussichtlichesEintreffen._value) >= CDate(Today().ToShortDateString) Then


                depatureDateIsNotPast = True
                lbWarningDateIsPast.Visible = False
                btnOK.DialogResult = DialogResult.OK
                btnMinus.Enabled = True
            Else
                btnOK.DialogResult = DialogResult.None
                lbWarningDateIsPast.Visible = True
                btnMinus.Enabled = False

            End If
        End If

        Return depatureDateIsNotPast

    End Function


    Function calcDuration() As Integer
        Dim result As Integer = 0

        If txbVoraussichtlichesEintreffen._value <> "" Then
            Dim StartDate = Convert.ToDateTime(txbAbgangsdatum._value)
            Dim EndDate = Convert.ToDateTime(txbVoraussichtlichesEintreffen._value)
            result = (EndDate - StartDate).Days
            If (result < 0) Then
                MsgBox("Transportdauer kann nicht negativ sein!")

                btnOK.DialogResult = DialogResult.None
            Else

                btnOK.DialogResult = DialogResult.OK
            End If
        End If
        Return result

    End Function


End Class