#!/usr/bin/python3

import sys, time, fcntl, os

clientId = sys.argv[1]
message = sys.argv[2]

clientFilePath = f'users/{clientId}.txt'

def write(s):
    f = open(clientFilePath, 'w+')
    try:
        fcntl.flock(f, fcntl.LOCK_EX)
        if f.read() == '':
            f.write(s)
        else:
            f.close()
            time.sleep(1)
            write(s)
    except Exception as e:
        print(e)
    f.close()

for i in range(10):
    write(f'{i}: {message}')
    time.sleep(2)

os.remove(clientFilePath)