"""Hooks fired before summarization removes messages from state."""

from __future__ import annotations

from deerflow.agents.memory import get_memory_manager
from deerflow.agents.middlewares.summarization_middleware import SummarizationEvent
from deerflow.config.memory_config import get_memory_config
from deerflow.runtime.user_context import resolve_runtime_user_id


def memory_flush_hook(event: SummarizationEvent) -> None:
    """Flush messages about to be summarized into the memory queue.

    Thin, backend-agnostic entry: only the ``enabled`` + ``thread_id`` gate
    and ``user_id`` resolution live here. The backend (via
    ``manager.add_nowait``) does the filtering, human/AI validation, and
    correction/reinforcement detection.
    """
    if not get_memory_config().enabled or not event.thread_id:
        return

    user_id = resolve_runtime_user_id(event.runtime)
    get_memory_manager().add_nowait(
        event.thread_id,
        list(event.messages_to_summarize),
        agent_name=event.agent_name,
        user_id=user_id,
    )