Imports System.Net

Public Class cMSEAPI

    Public API_STRING
    Dim API As New DataTable
    Dim rest As New Chilkat.Rest
    Dim SQL As New SQL
    Dim apiSettingsloaded As Boolean = False


    Sub New(program As String)
        VERAG_PROG_ALLGEMEIN.cChilkat_Helper.UnlockCilkat()
        API = SQL.loadDgvBySql("SELECT top(1) * FROM tblAPIEinstellungen WHERE api_program='" & program & "' and api_productive ='" & IIf(VERAG_PROG_ALLGEMEIN.cAllgemein.TESTSYSTEM, "0", "1") & "'", "ADMIN")
        If API.Rows.Count = 0 Then
            MsgBox("keine gültigen API-Einstellungen für " & program & " gefunden!")
        Else
            apiSettingsloaded = True
            API_STRING = API.Rows(0).Item("api_url")
        End If

    End Sub


    Public Function createJWT(ByRef failureText As String) As String
        Try

            Dim jwt As New Chilkat.Jwt
            Dim jose As New Chilkat.JsonObject
            Dim success As Boolean = jose.AppendString("alg", "HS256")
            success = jose.AppendString("typ", "JWT")

            ' Now build the JWT claims (also known as the payload)
            Dim claims As New Chilkat.JsonObject
            success = claims.AppendString("iss", API.Rows(0).Item("api_user"))
            Dim curDateTime As Integer = jwt.GenNumericDate(0)

            ' Set the timestamp defining an expiration time (end time) for the token
            ' to be now + 1 hour (3600 seconds)
            success = claims.AddIntAt(-1, "exp", curDateTime + 3600)

            jwt.AutoCompact = True

            Dim strJwt As String = jwt.CreateJwt(jose.Emit(), claims.Emit(), API.Rows(0).Item("api_password"))

            Debug.WriteLine(strJwt)
            Return strJwt

        Catch ex As WebException
            VERAG_PROG_ALLGEMEIN.cErrorHandler.ERR(ex.Message, ex.StackTrace, System.Reflection.MethodInfo.GetCurrentMethod.Name)
        End Try

    End Function

    Public Function getNewestTransactions(jwt As String, dt As DataTable) As String
        Try
            Dim returnText As String = ""
            Dim failureText As String = ""

            Dim success As Boolean

            rest.VerboseLogging = True
            Dim bTls As Boolean = True
            Dim port As Integer = 443
            Dim bAutoReconnect As Boolean = True
            success = rest.Connect(API_STRING, port, bTls, bAutoReconnect)
            If (success <> True) Then
                Debug.WriteLine("ConnectFailReason: " & rest.ConnectFailReason)
                Debug.WriteLine(rest.LastErrorText)
                failureText = rest.LastErrorText
                Return False
            End If

            If (success <> True) Then
                Debug.WriteLine("BAFailReason: " & rest.ConnectFailReason)
                Debug.WriteLine(rest.LastErrorText)
                failureText = rest.LastErrorText
                Return False
            End If

            rest.ClearAllQueryParams()

            rest.AddHeader("X-API-Key", jwt)

            rest.IdleTimeoutMs = 500000

            Dim responseJson As String = rest.FullRequestNoBody("GET", "/v1/transactions/new")
            If (rest.LastMethodSuccess <> True) Then
                Debug.WriteLine(rest.LastErrorText)
                rest.IdleTimeoutMs = 30000 'defualt
                Return "rest.LastErrorText"
            End If

            If (rest.ResponseStatusCode <> 200) Then
                Debug.WriteLine(rest.ResponseHeader)
                Return "rest.LastErrorText"
            End If

            Debug.WriteLine(responseJson)


            Dim json As New Chilkat.JsonObject
            success = json.Load(responseJson)
            If (success <> True) Then
                Debug.WriteLine(json.LastErrorText)
            End If

            Debug.WriteLine(json)


            Dim jsonArray As New Chilkat.JsonArray
            success = jsonArray.Load(responseJson)
            If (success <> True) Then
                Return jsonArray.LastErrorText
            End If


            Dim num As Integer = jsonArray.Size
            If num = -1 Then
                Return "FEHLER"
            End If


            Dim j As Integer = 0

            If dt IsNot Nothing And Not dt.Columns.Contains("transaction_id") Then

                dt.Columns.Add("transaction_id", GetType(String))
                dt.Columns.Add("partner_haulier_id", GetType(Integer))
                dt.Columns.Add("supplier_name", GetType(String))
                dt.Columns.Add("transaction_country", GetType(String))
                dt.Columns.Add("transaction_domain", GetType(String))

                dt.Columns.Add("purchase_datetime", GetType(DateTime))
                dt.Columns.Add("entry_point_name", GetType(String))
                dt.Columns.Add("entry_datetime", GetType(DateTime))
                dt.Columns.Add("exit_point_name", GetType(String))
                dt.Columns.Add("exit_datetime", GetType(DateTime))

                dt.Columns.Add("device_product_type", GetType(String))
                dt.Columns.Add("device_product_number", GetType(String))
                dt.Columns.Add("transaction_product_id", GetType(Integer))
                dt.Columns.Add("transaction_product_name", GetType(String))
                dt.Columns.Add("license_plate_number", GetType(String))

                dt.Columns.Add("vehicle_country", GetType(Integer))
                dt.Columns.Add("original_currency", GetType(String))
                dt.Columns.Add("original_net_amount", GetType(String))
                dt.Columns.Add("original_gross_amount", GetType(String))
                dt.Columns.Add("original_vat_percentage", GetType(Boolean))

                dt.Columns.Add("transaction_net_amount", GetType(Integer))
                dt.Columns.Add("transaction_gross_amount", GetType(String))
                dt.Columns.Add("exempt_amount", GetType(String))
                dt.Columns.Add("msts_fee_amount", GetType(String))
                dt.Columns.Add("msts_vat_amount", GetType(Boolean))

                dt.Columns.Add("msts_vat_percentage", GetType(Integer))
                dt.Columns.Add("total_gross_amount", GetType(String))
                dt.Columns.Add("transaction_status", GetType(String))
                dt.Columns.Add("original_transaction_id", GetType(String))
                dt.Columns.Add("credit_comment", GetType(Boolean))
                dt.Columns.Add("loading_date", GetType(Date))
                dt.Columns.Add("batch_seq_nr", GetType(Integer))


                While j < num

                    Dim transaction As Chilkat.JsonObject = jsonArray.ObjectAt(j)

                    Dim R As DataRow = dt.NewRow
                    'R("id") = groups.IntOf("id")
                    'R("name") = groups.StringOf("name")
                    'R("groupType") = groups.StringOf("groupType")
                    'R("info") = groups.StringOf("info")

                    dt.Rows.Add(R)
                    j = j + 1
                End While


                dt = dt.DefaultView.ToTable()

            End If




        Catch ex As WebException
            VERAG_PROG_ALLGEMEIN.cErrorHandler.ERR(ex.Message, ex.StackTrace, System.Reflection.MethodInfo.GetCurrentMethod.Name)
        End Try

    End Function

End Class