import shlex


def serialize(creator_id: str, argv: list[str]) -> bytes:
    return f"{creator_id}\n{shlex.join(argv)}\n".encode()


def parse(creator_line: str, command_line: str) -> tuple[int | None, str]:
    creator_id = None
    if creator_line.isdigit():
        creator_id = int(creator_line)
    return creator_id, command_line


def serialize_reply(tab_id: int, socket_path: str) -> str:
    return f"{tab_id}\n{socket_path}\n"


def parse_reply(data: str) -> tuple[int | None, str | None]:
    lines = data.strip().split("\n")
    if len(lines) < 2:
        return None, None
    tab_id = None
    if lines[0].isdigit():
        tab_id = int(lines[0])
    socket_path = lines[1] or None
    return tab_id, socket_path