Imports System.ComponentModel
Imports System.Drawing.Imaging
Imports DigitalData.Modules.Logging
Imports DigitalData.Modules.Messaging

Public Class frmFlowForm
    Private WithEvents Watcher As ClassClipboardWatcher = ClassClipboardWatcher.Singleton
    Private ActiveModules As List(Of String)
    Private Logger As Logger

    Private ESCHitCount As Integer = 0
    Private CurrentState As OnFlowFormStateChangedEvent.FlowFormState = OnFlowFormStateChangedEvent.FlowFormState.Default

    Private DTIDB_SEARCHES As DataTable
    Private IDBSearchActive As Boolean = False

    Const WS_EX_LAYERED As Int32 = &H80000

    Public Event ClipboardChanged As EventHandler(Of IDataObject)

    Public Sub New()
        ' Dieser Aufruf ist für den Designer erforderlich.
        InitializeComponent()

        ' Fügen Sie Initialisierungen nach dem InitializeComponent()-Aufruf hinzu.
        ActiveModules = New List(Of String)
        Logger = My.LogConfig.GetLogger()
    End Sub


    Public Sub New(ActiveModules As List(Of String))
        ' Dieser Aufruf ist für den Designer erforderlich.
        InitializeComponent()

        ' Fügen Sie Initialisierungen nach dem InitializeComponent()-Aufruf hinzu.
        Me.ActiveModules = ActiveModules
        Logger = My.LogConfig.GetLogger()
    End Sub

    Private Sub frmFlowForm_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        ' === Set Form Properties ===
        TopMost = True
        AllowDrop = True
        ShowInTaskbar = False

        SetFormLocation()
        SetFormState(OnFlowFormStateChangedEvent.FlowFormState.Default)

        ' === Register Events ===

        AddHandler MouseClick, AddressOf Form_MouseClick
        AddHandler MouseMove, AddressOf Form_MouseMove
        AddHandler KeyDown, AddressOf Form_KeyDown

        ' === Register As Event Listener ===
        EventBus.Instance.Register(Me)

        ' === TESTING Actions ===
        Dim oSQL = $"SELECT * FROM [dbo].[FNIDB_GET_SEARCH_PROFILES] ({My.Application.User.UserId},'{My.Application.User.Language}')"
        Dim oDT As DataTable = My.Database_IDB.GetDatatable(oSQL)
        SucheToolStripMenuItem.Visible = False
        If Not IsNothing(oDT) Then
            If oDT.Rows.Count > 0 Then
                IDBSearchActive = True
                DTIDB_SEARCHES = oDT
                SucheToolStripMenuItem.Visible = True
            End If

        End If

    End Sub

    Private Sub frmFlowForm_Closed(sender As Object, e As EventArgs) Handles Me.Closed
        Try
            EventBus.Instance.Unregister(Me)
        Catch ex As Exception
            Logger.Error(ex)
        End Try
    End Sub

    Private Sub Form_MouseClick(sender As Object, ByVal e As MouseEventArgs)
        If e.Button = MouseButtons.Right Then
            ContextMenuStrip1.Show(Cursor.Position)
        Else
            If CurrentState = OnFlowFormStateChangedEvent.FlowFormState.HasSearchResults Then
                SetFormState(OnFlowFormStateChangedEvent.FlowFormState.Default)
                EventBus.Instance.PostEvent(New OnFlowFormInteractionEvent(OnFlowFormInteractionEvent.FlowFormInteraction.Click))
            End If
        End If

    End Sub

    Private Sub Form_MouseMove(ByVal sender As Object, ByVal e As MouseEventArgs)
        If e.Button = MouseButtons.Left Then
            ClassWin32.ReleaseCapture()
            ClassWin32.SendMessage(Handle, ClassWin32.WM_NCLBUTTONDOWN, ClassWin32.HTCAPTION, 0)
        End If
    End Sub

    Private Sub Form_KeyDown(ByVal sender As Object, ByVal e As KeyEventArgs)
        If e.KeyCode = Keys.Escape Then
            If ESCHitCount > 0 Then
                Dim result As DialogResult = MessageBox.Show("Exit Zooflow", "Please Varify", MessageBoxButtons.YesNo)
                If result = DialogResult.Yes Then
                    Application.Exit()
                Else
                    ESCHitCount = 0
                End If
            Else
                ESCHitCount += 1
            End If
        ElseIf e.KeyCode = Keys.D AndAlso (e.Control) Then
            If ActiveModules.Contains(ClassConstants.MODULE_ZOOFLOW) Then
                MsgBox("Search")
            End If
        End If
    End Sub

    Public Sub OnEvent(e As OnFlowFormStateChangedEvent)
        CurrentState = e.State
        SetFormState(e.State)
    End Sub

    Public Sub SetFormState(State As OnFlowFormStateChangedEvent.FlowFormState)
        Select Case State
            Case OnFlowFormStateChangedEvent.FlowFormState.HasSearchResults
                SetBitmap(My.Resources.CW_GEFUNDEN_klein)
            Case OnFlowFormStateChangedEvent.FlowFormState.HasFileDropped
                SetBitmap(My.Resources.GLOBIX_GEFUNDEN_klein)
            Case Else
                SetBitmap(My.Resources.ZOOFLOW_Home_klein_Eckig)
        End Select
    End Sub

    Public Sub SetFormLocation()
        Me.Location = My.UIConfig.FlowForm.Location
    End Sub

    Private Sub frmFlowForm_DragOver(sender As Object, e As DragEventArgs) Handles Me.DragOver
        If Not ActiveModules.Contains(ClassConstants.MODULE_GLOBAL_INDEXER) Then
            e.Effect = DragDropEffects.None
        Else
            If e.Data.GetDataPresent(DataFormats.FileDrop) Then
                ' Handle file dragged from Windows
                e.Effect = DragDropEffects.Copy
                SetFormState(OnFlowFormStateChangedEvent.FlowFormState.HasFileDropped)
            ElseIf e.Data.GetDataPresent("FileGroupDescriptor") Then
                ' Handle a message dragged from Outlook
                e.Effect = DragDropEffects.Copy
                SetFormState(OnFlowFormStateChangedEvent.FlowFormState.HasFileDropped)
            ElseIf e.Data.GetDataPresent("aryFileGroupDescriptor") AndAlso (e.Data.GetDataPresent("FileContents")) Then
                ' Handle a message dragged from Thunderbird?
                e.Effect = DragDropEffects.Copy
                SetFormState(OnFlowFormStateChangedEvent.FlowFormState.HasFileDropped)
            Else
                ' Otherwise, do not handle
                e.Effect = DragDropEffects.None
            End If
        End If
    End Sub

    Private Sub frmFlowForm_DragLeave(sender As Object, e As EventArgs) Handles Me.DragLeave
        SetFormState(OnFlowFormStateChangedEvent.FlowFormState.Default)
    End Sub

    Private Sub Watcher_ClipboardChanged(sender As Object, e As IDataObject) Handles Watcher.ClipboardChanged
        If ActiveModules.Contains(ClassConstants.MODULE_CLIPBOARDWATCHER) Then
            RaiseEvent ClipboardChanged(sender, e)
        End If
    End Sub

    '''' <summary>
    '''' DragDrop Support
    '''' </summary>
    'Protected Overrides Sub WndProc(ByRef m As Message)
    '    If m.Msg = &H84 Then
    '        m.Result = CType(2, IntPtr)
    '        Return
    '    End If

    '    MyBase.WndProc(m)
    'End Sub

    Public Sub SetBitmap(ByVal bitmap As Bitmap)
        SetBitmap(bitmap, 255, bitmap.Width, bitmap.Height)
    End Sub

    Public Sub SetBitmap(ByVal Bitmap As Bitmap, ByVal Opacity As Byte, ByVal Width As Integer, ByVal Height As Integer)
        If Bitmap.PixelFormat <> PixelFormat.Format32bppArgb Then
            Throw New ApplicationException("The bitmap must be 32ppp with alpha-channel.")
        End If

        Dim oScreenDeviceContext As IntPtr = ClassWin32.GetDC(IntPtr.Zero)
        Dim oMemoryDeviceContext As IntPtr = ClassWin32.CreateCompatibleDC(oScreenDeviceContext)
        Dim oBitmap As IntPtr = IntPtr.Zero
        Dim oOldBitmap As IntPtr = IntPtr.Zero

        Try
            oBitmap = Bitmap.GetHbitmap(Color.FromArgb(0))
            oOldBitmap = ClassWin32.SelectObject(oMemoryDeviceContext, oBitmap)
            Dim oSize As ClassWin32.Size = New ClassWin32.Size(Width, Height)
            Dim oPointSource As ClassWin32.Point = New ClassWin32.Point(0, 0)
            Dim oTopPos As ClassWin32.Point = New ClassWin32.Point(Left, Top)
            Dim oBlend As ClassWin32.BLENDFUNCTION = New ClassWin32.BLENDFUNCTION With {
                .BlendOp = ClassWin32.AC_SRC_OVER,
                .BlendFlags = 0,
                .SourceConstantAlpha = Opacity,
                .AlphaFormat = ClassWin32.AC_SRC_ALPHA
            }
            ClassWin32.UpdateLayeredWindow(Handle, oScreenDeviceContext, oTopPos, oSize, oMemoryDeviceContext, oPointSource, 0, oBlend, ClassWin32.ULW_ALPHA)
        Finally
            ClassWin32.ReleaseDC(IntPtr.Zero, oScreenDeviceContext)

            If oBitmap <> IntPtr.Zero Then
                ClassWin32.SelectObject(oMemoryDeviceContext, oOldBitmap)
                ClassWin32.DeleteObject(oBitmap)
            End If

            ClassWin32.DeleteDC(oMemoryDeviceContext)
        End Try
    End Sub

    ''' <summary>
    ''' More Info: https://docs.microsoft.com/en-us/windows/win32/winmsg/window-features#layered-windows
    ''' </summary>
    ''' <returns></returns>
    Protected Overrides ReadOnly Property CreateParams As CreateParams
        Get
            Dim oParams As CreateParams = MyBase.CreateParams
            oParams.ExStyle = oParams.ExStyle Or WS_EX_LAYERED
            Return oParams
        End Get
    End Property

    Private Sub FlowFormTest1ToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles FlowFormTest1ToolStripMenuItem.Click
        frmFlowForm_Test1.Show()
    End Sub

    Private Sub ContextMenuStrip1_Opening(sender As Object, e As CancelEventArgs) Handles ContextMenuStrip1.Opening

    End Sub

    Private Sub SucheToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles SucheToolStripMenuItem.Click
        Dim oForm As New frmSearchStart(DTIDB_SEARCHES)
        oForm.Show()


    End Sub
End Class