rednet.open("back")
os.loadAPI("SHA256")

local dashboard = function()
  term.setBackgroundColor(colors.blue)
  term.clear()
  term.setTextColor(colors.white)
  term.setCursorPos(1,1)
  term.write("Menu")
  term.setCursorPos(46,1)
  term.write("Login")
  term.setCursorPos(1,2)
  term.write("=======================================")
  while true do
    if x > 45 and y < 3 then 
      login()
    end
  end
end

local login = function()
  term.setBackgroundColor(colors.blue)
  term.clear()
  term.setTextColor(colors.white)
  term.setCursorPos(1,1)
  term.write("Login")
  term.setCursorPos(46,1)
  term.write("Register")
  term.setCursorPos(1,2)
  term.write("======================================") 
  term.setCursorPos(20,15)
  term.write("Enter username.")
  term.setCursorPos(20,20)
  term.write("Enter password")
  term.setCursorPos(10,17)
  user = read()
  term.setCursorPos(20,23)
  password = read("*")
  pass = SHA256(password)
  Account = {user,pass}
  while true do
   id , m = rednet.receive()
     if id == 482 then
       if m[1] == "Valid" then
         menu()
       else
         dashboard()
      end
    end
  end
end

local register = function()
  term.setBackgroundColor(colors.blue)
  term.clear()
  term.setTextColor(colors.white)
  term.setCursorPos(1,1)
  term.write("Register")
  term.setCursorPos(46,1)
  term.write("Login")
  term.setCursorPos(20,15)
  term.write("Username")
  term.setCursorPos(20,20)
  term.write("Password")
  term.setCursorPos(20,25)
  term.write("Passsword")
  term.setCusorPos(20,17)
  user = read()
  term.setCursorPos(20,22)
  pass1 = read("*")
  term.setCursorPos(20,27)
  pass2 = read("*")
  if pass1 == pass2 then
    pass = SHA256.sha256(pass1)
    Add = {"#@$",user,pass}
    rednet.send(482,Add)
  else
    term.clear()
    term.setCursorPos(20,20)
    term.write("Passwords do not match.")
    sleep(2)
  end
  while true do
    id, m = rednet.receive()
      if id == 482 then
        term.clear()
        term.setCurorPos(1,1)
        term.write(m)
        sleep(2)
        login()
      else
        term.clear()
        term.setCursorPos(1,1)
        term.write("Cnnection Failed")
        sleep(2)
        menu() 
      end
    end
  end
end