from __future__ import annotations


def generate_dingding_chat_id(raw: dict, chat_type: str) -> str:
    if chat_type == "direct":
        sender_id = raw.get("senderId", "")
        return f"dm_{sender_id}"
    conversation_id = raw.get("conversationId", "")
    return f"group_{conversation_id}"


def resolve_dingding_chat_type(raw: dict) -> str:
    is_group = raw.get("isGroupChat", False)
    return "group" if is_group else "direct"


def generate_thread_key(channel_id: str, chat_id: str) -> str:
    if chat_id.startswith("dm_"):
        return f"{channel_id}:direct:{chat_id}"
    return f"{channel_id}:group:{chat_id}"