client.py

import socket, _thread, time

def main() -> None:
    ip   = str(input("enter server IP: "    )          )
    port = int(input("enter server port: "  ) or  6667 )
    name = str(input("enter your username: ") or "none")
    nick = str(input("enter your nick: "    ) or "user")

    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    
    sock.connect((ip, port))
    time.sleep(5) # wait for server to connect
    
    sock.send(f"USER {name} * * :{nick}\r\n".encode("utf-8"))
    time.sleep(1) # wait for server to process
    
    sock.send(f"NICK {nick}\r\n".encode("utf-8"))
    time.sleep(1) # wait for server to process

    _thread.start_new_thread(send_ping, (sock, ip)) 
    _thread.start_new_thread(receive_messages, (sock,))

    while True:
        msg = input()
        if not msg or msg == "":
            break

        if msg.startswith("/nick"):
            nick = msg.split(" ")[1]
            if not nick:
                print("You must provide a nick!")
                continue
            msg = f"NICK {nick}"

        elif msg.startswith("/msg"):
            parts = msg.split(" ", 2)
            if len(parts) < 3:
                print("Usage: /msg <target> <message>")
                continue
            target, message = parts[1], parts[2]
            msg = f"PRIVMSG {target} :{message}"

        elif msg.startswith("/join"):
            channel = msg.split(" ")[1]
            msg = f"JOIN {channel}"
            current_channel = channel

        else:
            if "current_channel" not in locals():
                print("You must join a channel first using /join <channel>")
                continue
            msg = f"PRIVMSG {current_channel} :{msg}"

        sock.send((msg.strip() + "\r\n").encode("utf-8"))

def receive_messages(sock) -> None:
    while True:
        data = sock.recv(1024)
        if not data:
            break

        response = data.decode("utf-8")
        print(response)

def send_ping(sock, server) -> None:
    while True:
        time.sleep(60)
        sock.send(f"PING :{server}\r\n".encode("utf-8"))


if __name__ == "__main__":
    main()