#!/usr/bin/env python

import sys,socket,time

def chat_server(port):
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.bind(('',port))
        s.listen()
        conn,addr = s.accept()
        print(f"Connexion depuis {addr[0]} sur le port {addr[1]}")
        while True:
            data = conn.recv(4096)
            print(data.decode(),end="")
            command = input()
            command += "\n"
            conn.send(command.encode())
            time.sleep(0.1)
    except KeyboardInterrupt:
        s.close()
    finally:
        print("bye")

if __name__ == "__main__":
    try:
        chat_server(int(sys.argv[1]))
    except IndexError:
        print(f"{sys.argv[0]} demande un port en  agument")