Option Explicit

' ===== ЗАГРУЗКА ФОРМЫ =====
Private Sub Form_Load()

    Dim confName As String
    Dim serverName As String
    
    ' Загружаем данные из файла
    LoadConferenceData confName, serverName
    
    ' Если имя конференции пустое, ставим "general"
    If Trim(confName) = "" Then
        confName = "general"
    End If
    
    txtConferenceName.Text = confName
    txtServerName.Text = serverName

End Sub

' ===== КНОПКА OK =====
Private Sub cmdOK_Click()

    If Trim(txtConferenceName.Text) = "" Then
        MsgBox "Please enter the conference name.", vbExclamation
        Exit Sub
    End If

    ' ==== Сохраняем введённые данные в файл ====
    SaveConferenceData Trim(txtConferenceName.Text), Trim(txtServerName.Text)

    ' ==== Сохраняем адрес конференции в переменную ДО Unload Me ====
    Dim confAddr As String
    If Trim(txtServerName.Text) = "" Then
        confAddr = Trim(txtConferenceName.Text)
    Else
        confAddr = Trim(txtConferenceName.Text) & "@" & Trim(txtServerName.Text)
    End If

    ' ==== Формируем команду /join_server ====
    Dim joinCmd As String
    joinCmd = "/join_server " & confAddr

    ' ==== Закрываем форму JoinConference сразу ====
    Unload Me

    ' ==== Проверка: уже подключены к конференции ====
    If Not Form1.ServerChatWindow Is Nothing Then
        
        If Form1.ServerChatWindow.Visible = True Then
            MsgBox "You are already connected to a conference." & vbCrLf & _
                   "If you want to join another one," & vbCrLf & _
                   "please close the current conference window first.", _
                   vbExclamation, "Conference already opened"
            Exit Sub
        End If
        
    End If

    ' ==== Создаём новое серверное окно ====
    Set Form1.ServerChatWindow = New FormChat
    Form1.ServerChatWindow.SetServer confAddr
    Form1.ServerChatWindow.Show vbModeless

    ' ==== Отправляем команду на сервер ====
    Form1.SendMessageToUser "", joinCmd

End Sub

' ===== КНОПКА CANCEL =====
Private Sub cmdCancel_Click()
    Unload Me
End Sub

' ===== СОХРАНЕНИЕ ДАННЫХ В conference.dat =====
Private Sub SaveConferenceData(ByVal confName As String, ByVal serverName As String)
    Dim f As Integer
    f = FreeFile
    Open App.Path & "\conference.dat" For Output As #f
        ' Если имя конференции пустое, сохраняем "general"
        If Trim(confName) = "" Then confName = "general"
        Print #f, confName
        ' Если серверное поле пустое, сохраняем "general"
        If Trim(serverName) = "" Then serverName = "general"
        Print #f, serverName
    Close #f
End Sub

' ===== ЗАГРУЗКА ДАННЫХ ИЗ conference.dat =====
Private Sub LoadConferenceData(ByRef confName As String, ByRef serverName As String)
    Dim f As Integer
    
    If Dir(App.Path & "\conference.dat") = "" Then
        confName = ""
        serverName = ""  ' оставляем пустым, потом заменим на "general"
        Exit Sub
    End If
    
    f = FreeFile
    Open App.Path & "\conference.dat" For Input As #f
        Line Input #f, confName
        Line Input #f, serverName
    Close #f
End Sub

' ===== ENTER = OK =====
Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)

    If KeyCode = vbKeyReturn Then
        KeyCode = 0
        cmdOK_Click
    End If

End Sub