keymasterID = nil
identifierID = nil
triesRemaining = 3

function updateScreen()
	os.pullEvent("char")
	term.clear()
	term.setCursorPos(1,2)

	rednet.send(identifierID, "getUser", "door")
	uname = ""
	while true do
		id, msg = rednet.receive()
		if id == identifierID then
			uname == msg
			break
		end
	end

	print("Welcome, " .. uname .."!")
end

function getPassword()
	pass = read("*")
	rednet.send(keymasterID, pass)

	while true do
		id, msg = rednet.receive()
		if id == keymasterID and msg == "open" then
			redstone.setOutput("top", true)
			sleep(5)
			redstone.setOutput("top", false)
			triesRemaining = 3
		end
		if id == keymasterID and msg == "denied" then
			triesRemaining = triesRemaining - 1
			if triesRemaining == 0 then
				print("Prepare for your death")
				sleep(1)
				rednet.send(keymasterID, "tesla")
			end
		end
	end
end

rednet.open("back")

while true do
	parallel.waitForAll(updateScreen, getPassword)
end