import socket
import argparse
import threading
import logging

def main(server_ip, server_port, log_file):
    logging.basicConfig(filename=log_file, level=logging.INFO,
                        format='%(asctime)s - %(levelname)s - %(message)s')

    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as server_socket:
        server_socket.bind((server_ip, server_port))
        logging.info(f"Server is listening on {server_ip}:{server_port}")

        while True:
            data, client_address = server_socket.recvfrom(10000)
            logging.info(f"Received data from {client_address}: {len(data)}")

            server_socket.sendto(data, client_address)
            logging.info(f"Sent data back to {client_address}: {len(data)}")

def run_server_in_background(server_ip, server_port, log_file):
    server_thread = threading.Thread(target=main, args=(server_ip, server_port, log_file), daemon=True)
    server_thread.start()

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="UDP server with command line arguments")
    parser.add_argument("--server_ip", default="0.0.0.0", help="Server IP address")
    parser.add_argument("--port", default=45793, type=int, help="Server port number")
    parser.add_argument("--background", action="store_true", help="Run server in background")
    parser.add_argument("--log_file", default="server.log", help="Log file path")
    args = parser.parse_args()

    if args.background:
        run_server_in_background(args.server_ip, args.port, args.log_file)
    else:
        main(args.server_ip, args.port, args.log_file)