from __future__ import annotations

import re


SESSION_NAME_RE = re.compile(r"^[A-Za-z0-9._-]{1,64}$")


def is_valid_session_name(name: str) -> bool:
    return SESSION_NAME_RE.fullmatch(name) is not None


def validate_session_name(name: str) -> None:
    if not is_valid_session_name(name):
        raise ValueError(
            "session name must be 1-64 ASCII letters, numbers, '.', '_' or '-'"
        )