Imports DigitalData.Modules.Base
Imports DigitalData.Modules.Database
Imports EnvelopeGenerator.Common
Imports GdPicture14.Annotations

Public Class FieldEditorController
    Inherits BaseClass

    Private ReadOnly ElementModel As ElementModel

    Private ReadOnly Database As MSSQLServer
    Private ReadOnly Document As EnvelopeDocument
    Public Property Elements As New List(Of EnvelopeDocumentElement)

    Public Class ElementInfo
        Public ReceiverId As Integer
        Public Page As Integer
        Public Guid As Integer
    End Class

    Public Sub New(pState As State, pDocument As EnvelopeDocument)
        MyBase.New(pState.LogConfig)
        Database = pState.Database
        Document = pDocument

        ElementModel = New ElementModel(pState)
    End Sub

    Public Function GetElementInfo(pAnnotationTag As String) As ElementInfo
        Dim oTag As String() = pAnnotationTag.Split("|"c)
        Dim oReceiverId = Integer.Parse(oTag(0))
        Dim oPage = Integer.Parse(oTag(1))
        Dim oGuid = Integer.Parse(oTag(2))

        Return New ElementInfo With {
            .Guid = oGuid,
            .Page = oPage,
            .ReceiverId = oReceiverId
        }
    End Function

    Private Function GetElementByPosition(pAnnotation As AnnotationStickyNote, pPage As Integer, pReceiverId As Integer) As EnvelopeDocumentElement
        Dim oElement = Elements.
            Where(Function(e)
                      Return e.Left = CSng(Math.Round(pAnnotation.Left, 5)) And
                      e.Top = CSng(Math.Round(pAnnotation.Top, 5)) And
                      e.Page = pPage And
                      e.ReceiverId = pReceiverId
                  End Function).SingleOrDefault()
        Return oElement
    End Function

    Private Function GetElementByGuid(pGuid As Integer) As EnvelopeDocumentElement
        Dim oElement = Elements.Where(Function(e) pGuid = e.Id).SingleOrDefault()
        Return oElement
    End Function

    Public Function GetElement(pAnnotation As AnnotationStickyNote) As EnvelopeDocumentElement
        Dim oInfo = GetElementInfo(pAnnotation.Tag)

        If oInfo.Guid = -1 Then
            Return GetElementByPosition(pAnnotation, oInfo.Page, oInfo.ReceiverId)
        Else
            Return GetElementByGuid(oInfo.Guid)
        End If
    End Function

    Public Sub AddOrUpdateElement(pAnnotation As AnnotationStickyNote)
        Dim oElement = GetElement(pAnnotation)

        If oElement IsNot Nothing Then
            oElement.Height = pAnnotation.Height
            oElement.Width = pAnnotation.Width
            oElement.X = pAnnotation.Left
            oElement.Y = pAnnotation.Top
        Else
            Dim oInfo = GetElementInfo(pAnnotation.Tag)

            Elements.Add(New EnvelopeDocumentElement() With {
                .ElementType = Common.Constants.ElementType.Signature.ToString,
                .Height = pAnnotation.Height,
                .Width = pAnnotation.Width,
                .X = pAnnotation.Left,
                .Y = pAnnotation.Top,
                .DocumentId = Document.Id,
                .ReceiverId = oInfo.ReceiverId,
                .Page = oInfo.Page
            })
        End If
    End Sub

    Public Function ClearElements(pPage As Integer, pReceiverId As Integer) As IEnumerable(Of EnvelopeDocumentElement)
        Return Elements.
            Where(Function(e) e.Page <> pPage And e.ReceiverId <> pReceiverId).
            ToList()
    End Function

    Public Function LoadElements() As Boolean
        Elements = ElementModel.List(Document.Id)

        If Elements Is Nothing Then
            Return False
        Else Return True
        End If
    End Function

    Public Function SaveElements(pReceiverId As Integer) As Boolean
        Return Elements.
            Where(Function(e) e.ReceiverId = pReceiverId).
            Select(AddressOf SaveElement).
            All(Function(pResult) pResult = True)
    End Function

    Public Function SaveElement(pElement As EnvelopeDocumentElement) As Boolean
        Try
            If pElement.Id > 0 Then
                Return ElementModel.Update(pElement)

            Else
                Return ElementModel.Insert(pElement)
            End If
        Catch ex As Exception
            Logger.Error(ex)
            Return False
        End Try
    End Function

    Public Function DeleteElement(pElement As EnvelopeDocumentElement) As Boolean
        Try
            ' Element aus Datenbank löschen
            If ElementModel.DeleteElement(pElement) Then
                Dim oElement = New List(Of EnvelopeDocumentElement)() From {pElement}
                Elements = Elements.Except(oElement).ToList()
                Return True
            Else
                Logger.Error("Element [{0}] could not be deleted!", pElement.Id)
                Return False
            End If
        Catch ex As Exception
            Logger.Error(ex)
            Return False
        End Try
    End Function
End Class