Imports DevExpress.Utils
Imports DevExpress.XtraEditors
Imports DevExpress.XtraEditors.Controls
Imports DevExpress.XtraLayout
Imports DigitalData.Modules.Base
Imports DigitalData.Modules.Database
Imports DigitalData.Modules.Logging

Public Class ParameterLoader
    Inherits BaseClass

    Private Const LIST_CONTROL_NULL_TEXT As String = "Kein Wert ausgewählt"

    Private Database As MSSQLServer
    Private LayoutControl As LayoutControl

    Public Sub New(pLogConfig As LogConfig, pDatabase As MSSQLServer, pLayoutControl As LayoutControl)
        MyBase.New(pLogConfig)
        Database = pDatabase
        LayoutControl = pLayoutControl
    End Sub

    Private Function GetDefaultValue(pParam As SearchParameter) As Object
        Dim oResult As Object = Nothing

        Select Case pParam.DataType
            Case Constants.DataTypeEnum.Boolean
                Boolean.TryParse(pParam.DefaultValue, oResult)

            Case Constants.DataTypeEnum.Date
                Date.TryParse(pParam.DefaultValue, oResult)

            Case Constants.DataTypeEnum.Integer
                Integer.TryParse(pParam.DefaultValue, oResult)

            Case Else
                oResult = pParam.DefaultValue

        End Select

        Return oResult
    End Function

    Public Sub LoadParameters(pSearch As Search)
        For Each oParam As SearchParameter In pSearch.Parameters
            Dim oControl As Control

            Select Case oParam.DataType
                Case Constants.DataTypeEnum.Boolean
                    Dim oDefaultValue As Boolean = GetDefaultValue(oParam)
                    Dim oCheckbox = New CheckEdit With {
                        .Text = oParam.Title,
                        .Checked = oDefaultValue
                    }

                    oControl = oCheckbox


                Case Constants.DataTypeEnum.Date
                    Dim oDefaultValue As Date = GetDefaultValue(oParam)

                    If oDefaultValue = Date.MinValue Then
                        oDefaultValue = Now
                    End If

                    oControl = New DateEdit() With {
                        .EditValue = oDefaultValue
                    }

                Case Constants.DataTypeEnum.String
                    Dim oDefaultValue As String = GetDefaultValue(oParam)

                    Select Case oParam.ItemType
                        Case Constants.ItemTypeEnum.List
                            Dim oCombobox = New ComboBoxEdit() With {
                                .Name = oParam.PatternTitle,
                                .Tag = oParam.PatternTitle,
                                .EditValue = oDefaultValue
                            }
                            Dim oClearButton = GetClearButtonForControl(oCombobox)
                            Dim oItems = oParam.ItemString.Split(";"c).ToList()
                            oCombobox.Properties.Items.AddRange(oItems)
                            oCombobox.Properties.NullText = LIST_CONTROL_NULL_TEXT
                            oCombobox.Properties.Buttons.Add(oClearButton)
                            oControl = oCombobox

                        Case Constants.ItemTypeEnum.SQL
                            Dim oGridCombobox = New LookUpEdit() With {
                                .Name = oParam.PatternTitle,
                                .Tag = oParam.PatternTitle,
                                .EditValue = oDefaultValue
                            }
                            Dim oClearButton = GetClearButtonForControl(oGridCombobox)
                            Dim oSQL = oParam.ItemString
                            Dim oTable = Database.GetDatatable(oSQL)
                            oGridCombobox.Properties.DataSource = oTable
                            oGridCombobox.Properties.DisplayMember = oTable.Columns.Item(0).ColumnName
                            oGridCombobox.Properties.ValueMember = oTable.Columns.Item(0).ColumnName
                            oGridCombobox.Properties.NullText = LIST_CONTROL_NULL_TEXT
                            oGridCombobox.Properties.Buttons.Add(oClearButton)
                            oControl = oGridCombobox

                        Case Else
                            oControl = New TextEdit() With {
                                .EditValue = oDefaultValue
                            }
                    End Select

                Case Else
                    Dim oDefaultValue As Object = GetDefaultValue(oParam)

                    oControl = New TextEdit() With {
                        .EditValue = oDefaultValue
                    }

            End Select

            oControl.Name = oParam.PatternTitle
            oControl.Tag = oParam.PatternTitle

            Dim oItem As LayoutControlItem = LayoutControl.AddItem()
            oItem.Text = oParam.Title
            oItem.Control = oControl
            oItem.TextLocation = Locations.Top
            oItem.TextToControlDistance = 3
            oItem.Padding = New DevExpress.XtraLayout.Utils.Padding(0, 0, 10, 0)


        Next
    End Sub

    Private Function GetClearButtonForControl(pControl As Control) As EditorButton
        Dim oClearButton As New EditorButton() With {
            .Kind = ButtonPredefines.Clear,
            .Tag = pControl.Name
        }
        AddHandler oClearButton.Click, AddressOf ClearButton_Click
        Return oClearButton
    End Function

    Private Sub ClearButton_Click(sender As Object, e As EventArgs)
        Dim oButton As EditorButton = sender
        Dim oControlName As String = oButton.Tag.ToString

        Dim oControl = LayoutControl.Controls.Find(oControlName, True).SingleOrDefault()

        Select Case oControl.GetType
            Case GetType(LookUpEdit)
                DirectCast(oControl, LookUpEdit).EditValue = Nothing

            Case GetType(ComboBoxEdit)
                DirectCast(oControl, ComboBoxEdit).EditValue = Nothing
        End Select

    End Sub
End Class