startup

function ping()
    while true do
    id, reply = rednet.receive("swatdoge")
    if reply ~= nil or reply ~= 9991 then
    print(reply)
    reply = 9991
    sleep(1)
end
end
end

function banner()
    print("Welcome to SwatDoge's chat program")
    print("")
end

function cls()
    term.clear()
    term.setCursorPos(1, 1)
end

function linecls()
  line, linepos = term.getCursorPos()
  linepos = 1
  line = line - 1
  term.clearLine()
  print("Hallo")
  line = line + 2
  term.setCursorPos(linepos, line)
  term.clearLine()
end

function name()
    cls()
    print("What would you like your name to be? ")
    account_name = read()
    if account_name == nil then
    account_name = admin
    password()
    end
    password()
end

function password()
    cls()
    write("Welcome "..account_name..", Type a password you'd want to use: ")
    write("")
    account_password = read("*")
    print(account_password)
    if account_password == nil then
    account_password = admin
    end
    cls()
    login()
end

function first_name()
    if account_name == nil then
      name()
    else
      print(name)
      cls()
      login()
    end
end

function login()
    local account_name_check
    local account_password_check
    print("Login with your information.")
    write("Username: ")
    account_name_check = read()
    write("Password: ")
    account_password_check = read("*")

    if (account_name_check == account_name) and (account_password_check == account_password) then
      cls()
      chat()
    else
      cls()
      print("wrong username or password")
      login()
    end
    end

    function chat()
    sleep(2)
      write("Talk: ")
      message = (read())
      linecls()


   if message ~= nil or message ~= 9991 then
    rednet.send(hostpc, account_name .. ": " .. message, "sender")
   end
    message = 9991
    chat()
    end


if pocket then
  rednet.open("back")
else
  rednet.open("top")
end


hostpc, hostmessage = rednet.receive("host")
parallel.waitForAll(first_name, ping)