Imports System.IO
Imports System.Reflection
Imports PluginContracts
Public Class Form1
    Dim db As New DB_Connection
    Dim plugins As ICollection(Of IPlugin) = New List(Of IPlugin)
    Private _Plugins As Dictionary(Of String, IPlugin)
    Dim f As Form
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        Dim splitter() As String
        Dim Pluginname As String
        Dim s As String
        For i As Integer = 1 To Environment.GetCommandLineArgs.Count - 1
            s = Environment.GetCommandLineArgs(i)
            splitter = s.Split("=")
            Select Case splitter(0)
                Case "/Plugin"
                    Pluginname = splitter(1)
                Case ("/MA")
                    Globals.Mitarbeiternr = splitter(1)
            End Select
        Next
        splitter = s.Split("")
        Load_Plugins()

        Try
            If _Plugins.ContainsKey(Pluginname) Then
                Dim plugin As IPlugin = _Plugins(Pluginname)
                plugin.Show(Globals.Mitarbeiternr, "", Me)
            End If
        Catch ex As Exception

        End Try
        Try
            Dim mdichild As Form = Me.ActiveMdiChild
            Me.Width = mdichild.Width + 50
            Me.Height = mdichild.Height + 50 + Me.MainMenuStrip.Height
            'mdichild.FormBorderStyle = FormBorderStyle.None
            Me.BackColor = Color.Coral
            Dim C As Control



            For Each C In Me.Controls

                If TypeOf C Is MdiClient Then

                    C.BackColor = Color.White

                    Exit For

                End If

            Next



            C = Nothing

        Catch ex As Exception
            MsgBox("Beim Aufrunf der Erweiterung ist ein Fehler aufgetreten (" + ex.Message + ")" + vbCrLf + "Die Funktion wird beendet.", vbExclamation)
            Me.Close()
        End Try

    End Sub

    Public Shared Function GetForm(ByVal handle As IntPtr) As Form
        Return If(handle = IntPtr.Zero, Nothing, TryCast(Control.FromHandle(handle), Form))
    End Function


    Sub Load_Plugins()
        Dim clsp As New clsPlugin
        If clsp.get_pluginrechte = "" Then
            Exit Sub
        End If
        Dim path As String
        path = clsp.get_path
        plugins = LoadPlugins(path)
        Populate_Plugins()
    End Sub

    Public Function LoadPlugins(path As String) As ICollection(Of IPlugin)
        Dim dllFileNames As String()

        If Directory.Exists(path) Then

            dllFileNames = Directory.GetFiles(path, "*.dll")

            Dim assemblies As ICollection(Of Assembly) = New List(Of Assembly)(dllFileNames.Length)
            For Each dllFile As String In dllFileNames
                Dim an As AssemblyName = AssemblyName.GetAssemblyName(dllFile)
                Dim assembly As Assembly = Assembly.Load(an)
                assemblies.Add(assembly)
            Next

            Dim pluginType As Type = GetType(IPlugin)
            Dim pluginTypes As ICollection(Of Type) = New List(Of Type)
            For Each assembly As Assembly In assemblies
                If assembly <> Nothing Then
                    Dim types As Type() = assembly.GetTypes()

                    For Each type As Type In types
                        If type.IsInterface Or type.IsAbstract Then
                            Continue For
                        Else
                            If type.GetInterface(pluginType.FullName) <> Nothing Then
                                pluginTypes.Add(type)
                            End If
                        End If
                    Next
                End If
            Next

            Dim plugins As ICollection(Of IPlugin) = New List(Of IPlugin)(pluginTypes.Count)
            For Each type As Type In pluginTypes
                Dim plugin As IPlugin = Activator.CreateInstance(type)
                plugins.Add(plugin)
            Next

            Return plugins
        End If

        Return Nothing
    End Function


    Private Sub Populate_Plugins()
        Dim clsp As New clsPlugin

        _Plugins = New Dictionary(Of String, IPlugin)

        Dim mi As New MenuItem

        Dim item As Object


        Dim i As Integer = 0
        For Each item In plugins

            'Dim pluginmenuiteam As New MenuItem(item.name)
            'Me.MenuitemErweiterungen.MenuItems.Add(pluginmenuiteam)

            _Plugins.Add(item.Name, item)





            ''lstPlugins.Items.Add(item.Name)
            'Dim tmisub As New ToolStripMenuItem
            'tmisub = Me.ToolstipdropdownErweiterungen.DropDownItems.Add(item.name)
            'AddHandler tmisub.Click, AddressOf Erweiterungen_Click
        Next


        'lstPlugins.SelectedIndex = 0

    End Sub

    Private Sub MnuItemPlugin1_Click(sender As Object, e As EventArgs)
        If _Plugins.ContainsKey(sender.text) Then
            Dim plugin As IPlugin = _Plugins(sender.text)
            plugin.Show(Globals.Mitarbeiternr, "", Me)
        End If
    End Sub

    Private Sub SchliessenToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles SchliessenToolStripMenuItem.Click
        Me.Close()
    End Sub
End Class