from datetime import datetime, timezone
import socket

def main():
    INTRODUCER_IP = "172.22.156.3"
    IP = socket.gethostbyname(socket.gethostname())
    SERVER_PORT = 6767
    INTRODUCER_FLAG = (INTRODUCER_IP == IP)

    members_list = {
        (IP, SERVER_PORT): {"heart_beat": 1, "last_seen": utc_time()}
    }

    server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    server.bind((IP, SERVER_PORT))

    if not INTRODUCER_FLAG:
        server.sendto(b"JOIN", (INTRODUCER_IP, SERVER_PORT))
        data, addr = server.recvfrom(4096)
        print(addr, data)

def utc_time():
    return datetime.now(timezone.utc)

if __name__ == "__main__":
    main()