from __future__ import annotations

from typing import Any

from yuxi.channels.models import ChatType


def resolve_chat_id(channel: str, event: dict[str, Any]) -> str:
    channel_type = event.get("channel_type", "")
    if channel.startswith("D") or channel_type == "im":
        user = event.get("user", "unknown")
        return f"dm_{user}"
    return f"channel_{channel}"


def resolve_chat_type(channel: str, event: dict[str, Any]) -> ChatType:
    if channel.startswith("D"):
        return ChatType.DIRECT
    channel_type = event.get("channel_type", "")
    if channel_type == "im":
        return ChatType.DIRECT
    thread_ts = event.get("thread_ts", "")
    ts = event.get("ts", "")
    if thread_ts and thread_ts != ts:
        return ChatType.THREAD
    return ChatType.CHANNEL


def extract_thread_ts(event: dict[str, Any]) -> str | None:
    thread_ts = event.get("thread_ts")
    ts = event.get("ts")
    if thread_ts and thread_ts != ts:
        return thread_ts
    return None