from __future__ import annotations


def parse_thread_key(message: dict) -> str | None:
    return message.get("thread", {}).get("threadKey")


def extract_thread_metadata(message: dict) -> dict:
    thread = message.get("thread", {})
    return {
        "thread_key": thread.get("threadKey"),
        "thread_name": thread.get("name"),
        "is_thread_root": not bool(thread.get("threadKey")),
    }


def is_thread_message(message: dict) -> bool:
    return bool(message.get("thread", {}).get("threadKey"))