Imports System.Data.SqlClient
Imports System.Web.UI.WebControls
Imports DigitalData.Modules.Base
Imports DigitalData.Modules.Logging

Public Class EnvelopeModel
    Inherits BaseModel

    Private ReadOnly UserModel As UserModel
    Private ReadOnly ReceiverModel As ReceiverModel

    Public Sub New(pState As State)
        MyBase.New(pState)

        UserModel = New UserModel(pState)
        ReceiverModel = New ReceiverModel(pState)
    End Sub

    Private Function ToEnvelope(pRow As DataRow) As Envelope
        Dim oEnvelope = New Envelope() With {
            .Id = pRow.ItemEx("GUID", 0),
            .Title = pRow.ItemEx("TITLE", ""),
            .ContractType = ObjectEx.ToEnum(Of Constants.ContractType)(pRow.ItemEx("CONTRACT_TYPE", "Contract")),
            .Uuid = pRow.ItemEx("ENVELOPE_UUID", ""),
            .Subject = pRow.ItemEx("SUBJECT", ""),
            .Message = pRow.ItemEx("MESSAGE", ""),
            .UserId = pRow.ItemEx("USER_ID", 0),
            .Status = ObjectEx.ToEnum(Of Constants.EnvelopeStatus)(pRow.ItemEx("STATUS", "Created")),
            .AddedWhen = pRow.Item("ADDED_WHEN"),
            .User = New User()
        }

        oEnvelope.User = UserModel.SelectUser(oEnvelope.UserId)
        oEnvelope.Receivers = ReceiverModel.ListEnvelopeReceivers(oEnvelope.Id)

        Return oEnvelope
    End Function

    Private Function ToEnvelope(pTable As DataTable) As Envelope
        Return pTable?.Rows.Cast(Of DataRow).
            Select(AddressOf ToEnvelope).
            Single()
    End Function

    Public Function GetByUuid(pEnvelopeUuid As String) As Envelope
        Try
            Dim oSql = $"SELECT * FROM [dbo].[TBSIG_ENVELOPE] WHERE ENVELOPE_UUID = '{pEnvelopeUuid}'"
            Dim oTable = Database.GetDatatable(oSql)

            Return ToEnvelope(oTable)
        Catch ex As Exception
            Logger.Error(ex)
            Return Nothing
        End Try
    End Function

    Public Function List() As IEnumerable(Of Envelope)
        Try
            Dim oSql = $"SELECT * FROM [dbo].[TBSIG_ENVELOPE] WHERE USER_ID = {State.UserId}"
            Dim oTable = Database.GetDatatable(oSql)

            Return oTable?.Rows.Cast(Of DataRow).
                Select(AddressOf ToEnvelope).
                ToList()
        Catch ex As Exception
            Logger.Error(ex)
            Return Nothing
        End Try
    End Function

    Public Function List(pReceiverId As Integer) As IEnumerable(Of Envelope)
        Try
            Dim oSql = $"SELECT T.* FROM [dbo].[TBSIG_ENVELOPE] T
                JOIN TBSIG_ENVELOPE_RECEIVER T2 ON T.GUID = T2.ENVELOPE_ID
                WHERE T2.RECEIVER_ID = {pReceiverId}"
            Dim oTable = Database.GetDatatable(oSql)

            Return oTable?.Rows.Cast(Of DataRow).
                Select(AddressOf ToEnvelope).
                ToList()

        Catch ex As Exception
            Logger.Error(ex)
            Return Nothing
        End Try
    End Function

    Public Function Send(pEnvelope As Envelope) As Boolean
        Try
            Dim oSql = "UPDATE [dbo].[TBSIG_ENVELOPE] SET STATUS = @STATUS, SENT_WHEN = GETDATE() WHERE GUID = @GUID"
            Dim oCommand As New SqlCommand(oSql)
            oCommand.Parameters.Add("GUID", SqlDbType.Int).Value = pEnvelope.Id
            oCommand.Parameters.Add("STATUS", SqlDbType.NVarChar).Value = Constants.EnvelopeStatus.Sent

            If Database.ExecuteNonQuery(oCommand) Then
                Return True
            Else
                Return False
            End If

        Catch ex As Exception
            Logger.Error(ex)
            Return False
        End Try
    End Function

    Public Function Insert(pEnvelope As Envelope) As Boolean
        Try
            Dim oSql = "INSERT INTO [dbo].[TBSIG_ENVELOPE] (SUBJECT, MESSAGE, ENVELOPE_UUID, STATUS, USER_ID, TITLE, CONTRACT_TYPE) "
            oSql += " VALUES (@SUBJECT, @MESSAGE, @UUID, @STATUS, @USER_ID, @TITLE, @CONTRACT_TYPE)"
            Dim oCommand As New SqlCommand(oSql)
            oCommand.Parameters.Add("SUBJECT", SqlDbType.NVarChar).Value = String.Empty
            oCommand.Parameters.Add("MESSAGE", SqlDbType.NVarChar).Value = String.Empty
            oCommand.Parameters.Add("UUID", SqlDbType.NVarChar).Value = pEnvelope.Uuid
            oCommand.Parameters.Add("STATUS", SqlDbType.NVarChar).Value = Constants.EnvelopeStatus.Created.ToString()
            oCommand.Parameters.Add("USER_ID", SqlDbType.Int).Value = pEnvelope.UserId
            oCommand.Parameters.Add("TITLE", SqlDbType.NVarChar).Value = pEnvelope.Title
            oCommand.Parameters.Add("CONTRACT_TYPE", SqlDbType.NVarChar).Value = pEnvelope.ContractType.ToString()

            If Database.ExecuteNonQuery(oCommand) Then
                pEnvelope.Id = GetEnvelopeId(pEnvelope)
                SetEnvelopeDate(pEnvelope)  'TODO JJ fragen
                Return True
            Else
                Return False
            End If

        Catch ex As Exception
            Logger.Error(ex)
            Return False
        End Try
    End Function

    Public Function Update(pEnvelope As Envelope, pTransaction As SqlTransaction) As Boolean
        Try
            Dim oSql = "UPDATE [dbo].[TBSIG_ENVELOPE] SET "
            oSql += " [SUBJECT] = @SUBJECT, "
            oSql += " [MESSAGE] = @MESSAGE, "
            oSql += " [STATUS] = @STATUS, "
            oSql += " [TITLE] = @TITLE, "
            oSql += " [CONTRACT_TYPE] = @CONTRACT_TYPE, "
            oSql += " [CHANGED_WHEN] = GETDATE() "
            oSql += " WHERE GUID = @ID AND USER_ID = @USER_ID"
            Dim oCommand As New SqlCommand(oSql)
            oCommand.Parameters.Add("SUBJECT", SqlDbType.NVarChar).Value = pEnvelope.Subject
            oCommand.Parameters.Add("MESSAGE", SqlDbType.NVarChar).Value = pEnvelope.Message
            oCommand.Parameters.Add("STATUS", SqlDbType.NVarChar).Value = pEnvelope.Status
            oCommand.Parameters.Add("TITLE", SqlDbType.NVarChar).Value = pEnvelope.Title
            oCommand.Parameters.Add("CONTRACT_TYPE", SqlDbType.NVarChar).Value = pEnvelope.ContractType.ToString()

            oCommand.Parameters.Add("ID", SqlDbType.Int).Value = pEnvelope.Id
            oCommand.Parameters.Add("USER_ID", SqlDbType.Int).Value = pEnvelope.UserId

            Return Database.ExecuteNonQuery(oCommand, pTransaction)

        Catch ex As Exception
            Logger.Error(ex)
            Return False
        End Try
    End Function

    Public Function Delete(pEnvelope As Envelope, pTransaction As SqlTransaction) As Boolean
        Try
            Dim oSql = $"DELETE FROM [dbo].[TBSIG_ENVELOPE] WHERE GUID = {pEnvelope.Id}"
            Return Database.ExecuteNonQuery(oSql, pTransaction)

        Catch ex As Exception
            Return False
            Logger.Error(ex)
        End Try
    End Function

    Private Function GetEnvelopeId(pEnvelope As Envelope) As Integer
        Try
            Return Database.GetScalarValue($"SELECT MAX(GUID) FROM TBSIG_ENVELOPE WHERE USER_ID = {pEnvelope.UserId}")

        Catch ex As Exception
            Logger.Error(ex)
            Return Nothing
        End Try
    End Function

    Private Sub SetEnvelopeDate(pEnvelope As Envelope)
        Try
            Dim addedWhen As Date = Database.GetScalarValue($"SELECT ADDED_WHEN FROM TBSIG_ENVELOPE WHERE GUID = {pEnvelope.Id}")
            pEnvelope.AddedWhen = addedWhen
        Catch ex As Exception
            Logger.Error(ex)
        End Try
    End Sub

End Class