import os
import time
option = ''
def register():
    username = input("What would you like your username to be?")
    password = input("What would you like your password to be?")
    file = open("logins.txt","a")
    file.write(username)
    file.write(" ")
    file.write(password)
    file.write(" ")
    file.write("\n")
    file.close()


def login():
    username = input("What is your username?")
    password = input("What is your password?")
    if username in open('logins.txt').read() and password in open('logins.txt').read():
        print("Login Correct, Welcome ",username)
        signedin = "yes"

def msg():
    message = input("What is your message?")
    recipient = input("What is the person's username you are sending it to")

    file = open("messages.txt","a")
    file.write(message)
    file.write(" ")
    file.write("To")
    file.write(" ")
    file.write(recipient)
    file.write(" ")
    file.write("From")
    file.write(username)
    file.write(" ")
    file.write("\n")
    file.close()


print("Welcome to CryptChat Your options are below: ")
print("Register")
print("Login")
print("Message (Login first)")
print("Type 'exit' to quit")
while option != 'exit':

    option = input("Please select one of the options: ")
    file = open("logins.txt","a")
    signedin = "no"

    if option.lower() == "register":
        register()

    if option.lower() == "login":
        login()

    if option.lower() == "Message" and signedin == "yes":
        msg()
    elif option.lower() =="message" and signedin =="no":
        print("you are not able to send a message unless\n you login first")
        print("you will be redirected to Login page in 5 seconds")
        time.sleep(5)
        print( os.system("CLS"),chr(13)," ",chr(13))
        login()
    print( os.system("CLS"),chr(13)," ",chr(13))