import socket
import threading

BROADCAST_IP = "255.255.255.255"
PORT = 10000
BUFFER_SIZE = 1024

def send_messages(sock, username):
    while True:
        message = input()
        if message.startswith("/pm"):
            try:
                _, target_ip, private_message = message.split(" ", 2)
                sock.sendto(f"PM {username}: {private_message}".encode(), (target_ip, PORT))
            except ValueError:
                print("Неверный формат команды. Используйте: /pm <ip> <сообщение>")
        else:
            sock.sendto(f"BC {username}: {message}".encode(), (BROADCAST_IP, PORT))

def receive_messages(sock):
    while True:
        data, addr = sock.recvfrom(BUFFER_SIZE)
        message = data.decode()
        if addr[0] != socket.gethostbyname(socket.gethostname()):
            print(f"[{addr[0]}] {message}")

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)

sock.bind(("", PORT))

username = input("Введите ваше имя: ")

send_thread = threading.Thread(target=send_messages, args=(sock, username))
receive_thread = threading.Thread(target=receive_messages, args=(sock,))

send_thread.start()
receive_thread.start()

send_thread.join()
receive_thread.join()