Imports DevExpress.XtraGrid.Views.Tile
Imports DigitalData.Modules.Database
Imports DigitalData.Modules.Logging

Public Class ChatControl
    Private ReadOnly IdColumn As String = "GUID"
    Private ReadOnly IdentificationColumn As String = "USER_FROM"
    Private ReadOnly MessageColumn As String = "MESSAGE_TEXT"
    Private ReadOnly DateColumn As String = "ADDED_WHEN"
    Private ReadOnly ToUserColumn As String = "TO_USER"

    Public Delegate Sub ConversationEnded()
    Public Event Conversation_Ended As ConversationEnded
    Public Delegate Sub ConversationUsersAdded_Success()
    Public Event Conversation_UsersAdded_Success As ConversationUsersAdded_Success
    Private Db As MSSQLServer
    Private LogConfig As LogConfig
    Private Logger As Logger

    Private AddMessage As Boolean

    Private oAddUSerForm As Form

    'Private ReadOnly UsernameColorsDict As New Dictionary(Of String, Color)
    'Private ReadOnly UsernameColors As New List(Of Color) From {
    '    Color.Purple,
    '    Color.Red,
    '    Color.LightBlue,
    '    Color.DarkSeaGreen
    '}
    Private IsAssistKeyPressed As Boolean = False

    Private AssistListBox As ListBox = New ListBox()

    Public IDBObjectId As Long
    Public ConnStringIDB As String
    Public ConversationIdentification As String
    Public UserID As Long
    Public Username As String
    Public User_Language As String
    Public CurrentConversationID As Long
    Public CurrentConversation_State As String
    Public CurrentConversation_UserActive As Boolean
    Public oDTConv_User As DataTable

    Public CurrentMentionedUser As String
    Public CurrentMentionedUserID As Long
    Public CurrentIdentifier
    Public User_Datatable_Select As DataTable
    Public DT_Rights As DataTable


    Public QU_Conv_End As DataTable

    Public Sub New()
        InitializeComponent()
    End Sub

    Public Function Init(LogConfig As LogConfig, ConnectionStringIDB As String, ConversationIdentification As String, UserID As Long, Username As String, USER_LANG As String,
                         Qust_Conv_End As DataTable, DTRIGHTS As DataTable)
        Try
            CurrentConversationID = 0
            Me.LogConfig = LogConfig
            Me.Logger = LogConfig.GetLogger()
            Me.ConnStringIDB = ConnectionStringIDB
            Me.ConversationIdentification = ConversationIdentification
            Me.UserID = UserID
            Me.Username = Username
            Me.User_Language = USER_LANG
            QU_Conv_End = Qust_Conv_End
            DT_Rights = DTRIGHTS
            Me.Db = New MSSQLServer(LogConfig, ConnStringIDB)
            Return True
        Catch ex As Exception
            Logger.Error(ex)
            Return False
        End Try

    End Function
    Sub Check_Rights()
        Dim oSQL As String
        ToolStripMenuItemConv_end.Visible = False
        tsmenitmHamburger.Visible = False
        AddMessage = False
        Dim oView As DataView = New DataView(DT_Rights)
        oView.RowFilter = "CONF_TITLE = 'CONVERSATION_USER_ACTIVE'"
        If oView.Count = 1 Then
            CurrentConversation_UserActive = True
        Else
            CurrentConversation_UserActive = False
        End If

        For Each oRow As DataRow In DT_Rights.Rows
            If oRow.Item("CONF_TITLE").ToString.Contains("CONVERSATION_RIGHT") Then
                Select Case oRow.Item("CONF_VALUE")
                    Case "Start|Stop"
                        ToolStripMenuItemConv_end.Visible = True
                        tsmenitmHamburger.Visible = True
                        AddMessage = True
                    Case "AddMessage"
                        AddMessage = True
                    Case "Admin"
                        ToolStripMenuItemConv_end.Visible = True
                        BenutzerHinzufügenToolStripMenuItem.Visible = True
                        tsmenitmHamburger.Visible = True
                        AddMessage = True
                    Case "Start"
                        BenutzerHinzufügenToolStripMenuItem.Visible = True
                        tsmenitmHamburger.Visible = True
                    Case "Stop"
                        ToolStripMenuItemConv_end.Visible = True
                End Select
            ElseIf oRow.Item("CONF_TITLE") = "CONVERSATION_ADD_USER_SELECT" Then
                oSQL = oRow.Item("CONF_VALUE")
                oSQL = oSQL.Replace("@CONVID", CurrentConversationID)
                User_Datatable_Select = Db.GetDatatable(oSQL)
                Logger.Debug($"User_Datatable_Select [{User_Datatable_Select}]")
            End If


        Next
        If CurrentConversation_State = "Started" Then
            pnlMessage.Visible = AddMessage
        Else
            pnlMessage.Visible = False
            tsmenitmHamburger.Visible = False
        End If

    End Sub

    Public Function GetConversations(IDBObjectId As Long)
        CurrentConversationID = 0
        Dim oSQL As String = $"SELECT DISTINCT T.CONVERSATION_ID,T.TITLE,T.CONVERSATION_STATE,T.ADDED_WHEN FROM VWIDB_CONVERSATION T INNER JOIN VWIDB_CONVERSATION_USER T1 ON T.CONVERSATION_ID = T1.CONV_ID  WHERE IDB_OBJ_ID = {IDBObjectId} 
                            AND T1.USER_ID = {UserID} 
                            ORDER BY CONVERSATION_ID DESC"
        Dim oDatatable As DataTable = Db.GetDatatable(oSQL)
        Dim oConversations As New List(Of String)
        If Not IsNothing(oDatatable) Then
            Dim i = 0
            For Each oROW As DataRow In oDatatable.Rows
                Dim oItem = oROW.Item("CONVERSATION_ID").ToString + "|" + oROW.Item("TITLE").ToString + "|" + oROW.Item("CONVERSATION_STATE").ToString + "|" + oDatatable.Rows(0).Item("ADDED_WHEN").ToString
                oConversations.Insert(i, oItem)
                i += 1
                If oROW.Item("CONVERSATION_STATE") = "Started" Then
                    If CurrentConversationID = 0 Then
                        CurrentConversationID = oROW.Item("CONVERSATION_ID")
                        LoadConversation(CurrentConversationID)
                    End If
                End If
            Next
        End If
        Return oConversations
    End Function

    Public Sub LoadConversation(ConversationId As Long)
        ListBoxUserMention.Visible = False
        RichTextBox1.Text = ""
        Dim oSQL As String = $"SELECT * FROM VWIDB_CONV_MESSAGES WHERE CONV_ID = {ConversationId} ORDER BY GUID"
        Dim oDatatable As DataTable = Db.GetDatatable(oSQL)
        ' BuildUsernameColorDict(oDatatable)
        oSQL = $"SELECT * FROM VWIDB_CONVERSATION WHERE CONVERSATION_ID = {ConversationId}"
        Dim oDatatable2 As DataTable = Db.GetDatatable(oSQL)

        GridChatOld.DataSource = ChatSource
        GridChat.DataSource = ChatSource

        ChatSource.DataSource = oDatatable
        tsmitmTitle.Text = oDatatable2.Rows(0).Item("TITLE")
        CurrentConversationID = ConversationId
        CurrentConversation_State = oDatatable2.Rows(0).Item("CONVERSATION_STATE")
        oSQL = $"SELECT * FROM VWIDB_CONVERSATION_USER WHERE CONV_ID = {ConversationId}"
        oDTConv_User = Db.GetDatatable(oSQL)
        If TeilnehmerToolStripMenuItem.HasDropDownItems Then
            TeilnehmerToolStripMenuItem.DropDownItems.Clear()
        End If

        If ConversationIdentification.Contains("@") Then
            CurrentIdentifier = "EMAIL"
        Else
            CurrentIdentifier = "USERNAME"
        End If
        AssistListBox.Items.Clear()
        ListBoxUserMention.Items.Clear()

        Try
            For Each oROW As DataRow In oDTConv_User.Rows

                Dim oConvUser
                oConvUser = oROW.Item(CurrentIdentifier)
                If IsDBNull(oConvUser) Then
                    oConvUser = String.Empty
                End If

                If oConvUser.ToString = String.Empty Then
                    If CurrentIdentifier = "EMAIL" Then
                        oConvUser = $"No Email for User '{oROW.Item("USERNAME")}'"
                    Else
                        oConvUser = $"No Identification for UserID '{oROW.Item("USER_ID")}'"
                    End If
                Else
                    ListBoxUserMention.Items.Add("@" & oConvUser.ToString.Substring(0, oConvUser.ToString.IndexOf("@")))
                    AssistListBox.Items.Add("@" & oConvUser.ToString.Substring(0, oConvUser.ToString.IndexOf("@")))

                End If
                Dim oToolStripItem As ToolStripMenuItem = New ToolStripMenuItem(oConvUser.ToString)
                TeilnehmerToolStripMenuItem.DropDownItems.Add(oToolStripItem)
            Next
            AddHandler AssistListBox.SelectedIndexChanged, AddressOf AssistListBox_Changed
        Catch ex As Exception
            MsgBox(ex.Message, MsgBoxStyle.Critical, "Error adding ConversationUsers")
        End Try

        Check_Rights()
    End Sub

    Public Sub NewMessage(MessageText As String)
        Try
            Dim oSQL As String = $"EXEC [PRIDB_NEW_CONVERSATION_MESSAGE] {CurrentConversationID},'{MessageText}', '{ConversationIdentification}', {CurrentMentionedUserID},'{User_Language}'"
            Logger.Debug($"NewMessageSQL: {oSQL}")
            Dim oResult = Db.GetScalarValue(oSQL)
            LoadConversation(CurrentConversationID)
            RichTextBox1.Text = String.Empty
            ChatViewOld.MoveLast()
            ChatView.MoveLast()
        Catch ex As Exception
            Logger.Error(ex)
        End Try
    End Sub

    'Private Sub BuildUsernameColorDict(Datatable As DataTable)
    '    Dim oIndex = 0

    '    UsernameColorsDict.Clear()

    '    Datatable.AsEnumerable().
    '        Select(Function(Row) Row.Item(IdentificationColumn)).
    '        Distinct().ToList().
    '        ForEach(Sub(Name)
    '                    UsernameColorsDict.Add(Name, UsernameColors.Item(oIndex))
    '                    oIndex += 1
    '                End Sub)
    'End Sub

    Private Sub ChatView_CustomItemTemplate(sender As Object, e As TileViewCustomItemTemplateEventArgs) Handles ChatViewOld.CustomItemTemplate
        Dim oRow As DataRow = ChatViewOld.GetDataRow(e.RowHandle)
        Dim oIdentification As String = oRow.Item(IdentificationColumn)
        Dim oToUser = oRow.Item(ToUserColumn)

        If Not IsDBNull(oToUser) Then
            e.Template = e.Templates.Item("ChatTo")
        Else
            'If oIdentification = ConversationIdentification Or oIdentification = Username Then
            '    e.Template = e.Templates.Item("ChatRight")
            'Else
            '    e.Template = e.Templates.Item("ChatLeft")
            'End If
            e.Template = e.Templates.Item("ChatLeft")
        End If
    End Sub

    Private Sub ChatView_ItemCustomize(sender As Object, e As TileViewItemCustomizeEventArgs) Handles ChatViewOld.ItemCustomize
        Dim oRow As DataRow = ChatViewOld.GetDataRow(e.RowHandle)
        Dim oUsername As String = oRow.Item(IdentificationColumn)
        Dim oMessage As String = oRow.Item(MessageColumn)
        Dim oToUser = oRow.Item(ToUserColumn)
        ' Dim oColor As Color = UsernameColorsDict.Item(oUsername)

        If oUsername = ConversationIdentification Or oUsername = Username Then
            e.Item.AppearanceItem.Normal.BackColor = Color.PaleTurquoise
            e.Item.Item(IdentificationColumn).Appearance.Normal.ForeColor = Color.Purple
        Else
            e.Item.Item(IdentificationColumn).Appearance.Normal.ForeColor = Color.Red
        End If

        e.Item.ItemSize = DevExpress.XtraEditors.TileItemSize.Wide
    End Sub

    Private Sub SimpleButton1_Click(sender As Object, e As EventArgs) Handles btnSendMessage.Click
        If RichTextBox1.Text.Count > 0 Then
            NewMessage(RichTextBox1.Text)
        End If
    End Sub

    Private Sub ToolStripMenuItemConv_end_Click(sender As Object, e As EventArgs) Handles ToolStripMenuItemConv_end.Click
        If CurrentConversationID <> 0 Then
            Dim result As MsgBoxResult
            result = MessageBox.Show(QU_Conv_End.Rows(0).Item("STRING1").ToString, QU_Conv_End.Rows(0).Item("STRING2").ToString, MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation)
            If result = MsgBoxResult.Yes Then
                Dim oSQL = $"EXEC PRIDB_END_CONVERSATION {CurrentConversationID}, '{Username}', '{User_Language}'"
                If Db.ExecuteNonQuery(oSQL) = True Then
                    RaiseEvent Conversation_Ended()
                Else
                    MsgBox("Unexpected error in PRIDB_END_CONVERSATION - Check Your log!", MsgBoxStyle.Exclamation)
                End If
            End If
        End If
    End Sub

    Private Sub BenutzerHinzufügenToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles BenutzerHinzufügenToolStripMenuItem.Click
        Dim oForm = New Form()
        Dim oaddUS As ChatAddUser.ChatAddUser = New ChatAddUser.ChatAddUser()
        oaddUS.Init(LogConfig, ConnStringIDB, CurrentConversationID, Username, User_Language, User_Datatable_Select)
        oForm.Controls.Add(oaddUS)
        oaddUS.Dock = DockStyle.Fill
        oForm.MaximizeBox = False
        oForm.MinimizeBox = False
        oForm.FormBorderStyle = FormBorderStyle.FixedDialog
        oForm.StartPosition = FormStartPosition.CenterScreen
        oForm.Text = ""
        AddHandler oaddUS.User_Added, AddressOf onUsersAdded
        oAddUSerForm = oForm
        oForm.ShowDialog()
    End Sub

    Sub onUsersAdded()
        RaiseEvent Conversation_UsersAdded_Success()
        oAddUSerForm.Close()
    End Sub

    Private Function GetPoint(ByVal textBoxControl As RichTextBox) As Point
        Dim graphics_1 As Graphics = Graphics.FromHwnd(textBoxControl.Handle)
        Dim size As SizeF = graphics_1.MeasureString(textBoxControl.Text.Substring(0, textBoxControl.SelectionStart), textBoxControl.Font)
        Dim coord As New Point(CInt(size.Width) + textBoxControl.Location.X, CInt(size.Height) + textBoxControl.Location.Y)
        Return coord
    End Function



    Private Sub RichTextBox1_KeyUp(sender As Object, e As KeyEventArgs) Handles RichTextBox1.KeyUp
        If e.Control And e.KeyCode = Keys.Enter And RichTextBox1.Text.Count > 0 Then
            NewMessage(RichTextBox1.Text)
        ElseIf (Keys.Alt AndAlso Keys.Control) And e.KeyCode = keys.Q Then
            With RichTextBox1
                ListBoxUserMention.Left = .GetPositionFromCharIndex(.SelectionStart).X + .Left + 10
                ListBoxUserMention.Top = .GetPositionFromCharIndex(.SelectionStart).Y + .Top + 20
                ' Jetzt ListBox einblendenden, Focus auf diese setzen 
                ' und den ersten Eintrag selektieren
                ListBoxUserMention.Visible = True
                ListBoxUserMention.Focus()
                ListBoxUserMention.SelectedIndex = 0
            End With

            'Dim opoint As Point = GetPoint(sender)
            'AssistListBox.PointToClient(opoint)
            'pnlMessage.Controls.Add(AssistListBox)
            'AssistListBox.Show()
            'AssistListBox.BringToFront()

            '    '@ was pressed
        End If
    End Sub
    Sub AssistListBox_Changed()
        Try
            RichTextBox1.Text = RichTextBox1.Text + AssistListBox.SelectedItem + ": "
            RichTextBox1.SelectionFont = New Font("Tahoma", 10, FontStyle.Bold And FontStyle.Underline)
            RichTextBox1.Text = RichTextBox1.Text.Replace("@@", "@")
            pnlMessage.Controls.Remove(AssistListBox)
            'RichTextBox1.SelectedText = AssistListBox.SelectedItem

        Catch ex As Exception
            Logger.Error(ex)
        End Try

    End Sub
    Sub ADD_MentionedUser(pUser As String)
        Dim oPos As Integer = RichTextBox1.TextLength
        Dim oUsertext = pUser & ": "
        With RichTextBox1
            .AppendText(Replace(.Text, "@", vbNullString) & oPos)
            .Select(oPos, oUsertext.Length)
            .SelectionColor = Color.Blue
            .Select()

        End With

    End Sub

    Private Sub ListBoxUserMention_KeyUp(sender As Object, e As KeyEventArgs) Handles ListBoxUserMention.KeyUp
        If e.KeyCode = Keys.Return Then
            Dim oMentionedUser As String = ListBoxUserMention.SelectedItem
            'ADD_MentionedUser(strTag)
            With RichTextBox1

                CUrrentMentionedUser = oMentionedUser
                ' Logger.Debug($"ListBoxUserMention_KeyUp.CurrentMentionedUser = {CurrentMentionedUser}")
                For Each oROW As DataRow In oDTConv_User.Rows

                    Dim oConvUser2beChecked
                    oConvUser2beChecked = oROW.Item(CurrentIdentifier)
                    If IsDBNull(oConvUser2beChecked) Then
                        oConvUser2beChecked = String.Empty
                    End If

                    If oConvUser2beChecked.ToString = String.Empty Then
                        If CurrentIdentifier = "EMAIL" Then
                            oConvUser2beChecked = $"No Email for User '{oROW.Item("USERNAME")}'"
                        Else
                            oConvUser2beChecked = $"No Identification for UserID '{oROW.Item("USER_ID")}'"
                        End If
                    End If
                    CurrentMentionedUser = CurrentMentionedUser.Substring(1, CurrentMentionedUser.Length - 1)
                    'Logger.Debug($"oConvUser2beChecked = {CurrentMentionedUser}")
                    If oConvUser2beChecked.ToString.Contains(CurrentMentionedUser) Then
                        CurrentMentionedUserID = oROW.Item("USER_ID")
                        Logger.Debug($"CurrentMentionedUserID Changed: {CurrentMentionedUserID}")
                    End If


                Next

                ' Das "Steuerzeichen" # ersetzen durch einen NullString
                .Text = Replace(.Text, "@", vbNullString) & oMentionedUser & ": "

                ' wo soll der Cursor nach dem Einfügen in der RTB stehen?
                .SelectionStart = .TextLength

                ' Listbox wieder auf den ersten Eintrag setzen
                ' und ausblenden
                ListBoxUserMention.SelectedItem = 0
                ListBoxUserMention.Visible = False

                ' Focus wieder auf RTB setzen
                .Focus()
            End With
        End If
    End Sub

    Private Sub ChatView_CustomDrawRowPreview(sender As Object, e As DevExpress.XtraGrid.Views.Base.RowObjectCustomDrawEventArgs) Handles ChatView.CustomDrawRowPreview
        Dim oRow As DataRow = ChatViewOld.GetDataRow(e.RowHandle)
        Dim oUsername As String = oRow.Item(IdentificationColumn)
        Dim oToUser = oRow.Item(ToUserColumn)
        Dim oIsOwnMessage As Boolean = oUsername = ConversationIdentification Or oUsername = Username

        ' Eigene Nachrichten
        If oIsOwnMessage Then
            e.Appearance.BackColor = Color.White
        End If

        ' Andere Nachrichten
        If Not oIsOwnMessage Then
            e.Appearance.BackColor = Color.PaleTurquoise
        End If
    End Sub

    Private Sub ChatView_CustomDrawCell(sender As Object, e As DevExpress.XtraGrid.Views.Base.RowCellCustomDrawEventArgs) Handles ChatView.CustomDrawCell
        Dim oRow As DataRow = ChatViewOld.GetDataRow(e.RowHandle)
        Dim oUsername As String = oRow.Item(IdentificationColumn)
        Dim oToUser = oRow.Item(ToUserColumn)

        Dim oIsOwnMessage As Boolean = oUsername = ConversationIdentification Or oUsername = Username

        ' Eigene Nachrichten
        If oIsOwnMessage Then
            e.Appearance.BackColor = Color.White
        End If

        ' Andere Nachrichten
        If Not oIsOwnMessage Then
            If Not (IsNothing(oToUser) Or IsDBNull(oToUser)) Then
                If oToUser = Username Or oToUser = ConversationIdentification Then
                    e.Appearance.BackColor = Color.LightSalmon
                Else
                    e.Appearance.BackColor = Color.PaleTurquoise
                End If
            Else
                e.Appearance.BackColor = Color.PaleTurquoise
            End If
        End If
    End Sub
End Class