function playerJoin (playerNick, playerUsername)
  local joinedPlayerName = getPlayerName ( source )
  if joinedPlayerName == "Player" then
         cancelEvent(true,"The nick \"Player\" is not allowed, please change it to something else. You can change your nick in Settings menu Multiplayer tab.") --in that case refuse the connection
  if
   function checkExistingFile(joinedPlayerName.txt)
    if not filename then
     createRegWindow()
     outputChatBox("Добро пожаловать на сервер Multi Role Play, пожалуйста зарегистрируйтесь.")
        if (wdwReg ~= nil) then
      guiSetVisible(wdwReg, true)
      else
      outputChatBox("An unexpected error has occurred and the log in GUI has not been created.")
     end  
     showCursor(true)
     guiSetInputEnabled(true)
    end
    if exists then
     createLoginWindow()
     outputChatBox("Добро пожаловать на сервер Multi Role Play, пожалуйста авторизуйтесь.")
        if (wdwLogin ~= nil) then
      guiSetVisible(wdwLogin, true)
      else
      outputChatBox("An unexpected error has occurred and the log in GUI has not been created.")
     end  
     showCursor(true)
     guiSetInputEnabled(true)
    end
   end
  end
end
addEventHandler ( "onPlayerJoin", getRootElement(), playerJoin )

-- Регистрация
function createRegWindow()
  local X = 0.375
  local Y = 0.375
  local Width = 0.25
  local Height = 0.25
  wdwReg = guiCreateWindow(X, Y, Width, Height, "Registration", true)
   
  X = 0.0825
  Y = 0.2
  Width = 0.25
  Height = 0.25
  guiCreateLabel(X, Y, Width, Height, "Username", true, wdwReg)
  Y = 0.5
  guiCreateLabel(X, Y, Width, Height, "Password", true, wdwReg)
   
   
  X = 0.415
  Y = 0.2
  Width = 0.5
  Height = 0.15
  edtUser = guiCreateEdit(X, Y, Width, Height, "", true, wdwReg)
  Y = 0.5
  edtPass = guiCreateEdit(X, Y, Width, Height, "", true, wdwReg)
  guiEditSetMaxLength(edtUser, 50)
  guiEditSetMaxLength(edtPass, 50)
   
  X = 0.415
  Y = 0.7
  Width = 0.25
  Height = 0.2
  btnLogin = guiCreateButton(X, Y, Width, Height, "Reg In", true, wdwReg)
   
  guiSetVisible(wdwReg, false)
  addEventHandler("onClientGUIClick", btnLogin, clientSubmitReg, false)
end
function clientSubmitReg(button,state)
   if button == "left" and state == "up" then
   local username = guiGetText(edtUser)
   local password = guiGetText(edtPass)
   
   if username and password then
   triggerServerEvent("submitReg", getRootElement(), username, password)
     local newFile = fileCreate("..playerNick...txt")            
     if (newFile) then                    
      fileWrite(newFile, "username = ..username..")
      fileWrite(newFile, "password = ..password..")
      fileClose(newFile)                            
     end
   guiSetInputEnabled(false)
   guiSetVisible(wdwReg, false)
   showCursor(false)
  end
end
function loginHandler(username,password)
   
end
   
addEvent("submitReg",true)
addEventHandler("submitReg",root,loginHandler)

-- Логин
function createLoginWindow()
  local X = 0.375
  local Y = 0.375
  local Width = 0.25
  local Height = 0.25
  wdwLogin = guiCreateWindow(X, Y, Width, Height, "Enter your login", true)
   
  X = 0.0825
  Y = 0.2
  Width = 0.25
  Height = 0.25
  guiCreateLabel(X, Y, Width, Height, "Username", true, wdwLogin)
  Y = 0.5
  guiCreateLabel(X, Y, Width, Height, "Password", true, wdwLogin)
   
  X = 0.415
  Y = 0.2
  Width = 0.5
  Height = 0.15
  edtUser = guiCreateEdit(X, Y, Width, Height, "", true, wdwLogin)
  Y = 0.5
  edtPass = guiCreateEdit(X, Y, Width, Height, "", true, wdwLogin)
  -- set the maximum character length for the username and password fields to 50
  guiEditSetMaxLength(edtUser, 50)
  guiEditSetMaxLength(edtPass, 50)
   
  X = 0.415
  Y = 0.7
  Width = 0.25
  Height = 0.2
  btnLogin = guiCreateButton(X, Y, Width, Height, "Log In", true, wdwLogin)
   
  -- make the window invisible
  guiSetVisible(wdwLogin, false)
  addEventHandler("onClientGUIClick", btnLogin, clientSubmitLogin, false)
end
function clientSubmitLogin(button,state)
  -- if our login button was clicked with the left mouse button, and the state of the mouse button is up
  if button == "left" and state == "up" then
   local username = guiGetText(edtUser)
   local password = guiGetText(edtPass)
   if username and password then
    triggerServerEvent("submitLogin", getRootElement(), username, password)
   
   guiSetInputEnabled(false)
   guiSetVisible(wdwLogin, false)
   showCursor(false)
  else
    -- otherwise, output a message to the player, do not trigger the server
    -- and do not hide the gui
    outputChatBox("Пожалуйста введите логин и пароль.")
   end
  end
end
function loginHandler(username,password)
  -- check that the username and password are correct
  if username == "user" and password == "apple" then
   -- the player has successfully logged in, so spawn them
   if (client) then
    spawnPlayer(client, 1959.55, -1714.46, 10)
    fadeCamera(client, true)
    outputChatBox("Welcome to My Server.", client)
   end
  else
   -- if the username or password are not correct, output a message to the player
   outputChatBox("Не правильный пароль, пожалуйста перезайдите и попробуйте сново.",client)
         end    
end
   
addEvent("submitLogin",true)
addEventHandler("submitLogin",root,loginHandler)