"""Quiet ``hermes chat -Q`` helpers: bind this session's key and resume nested notifies.

Bot Mode delivers a local DM as ``hermes -p <bot> chat -Q --query-file``. Interactive
chat binds ``set_current_session_key(self.session_id)`` around the turn; the quiet
path did not, so a nested ``message_agent`` notify inherited the dispatcher's
``HERMES_SESSION_KEY`` and never woke the recipient. Quiet also printed and exited
after one turn, so a nested teammate reply that finished during the one-shot linger
was never injected as a follow-up.
"""

from __future__ import annotations

import contextlib
import time
from typing import Any, Callable

# Nested A→B→C is one extra turn; this caps a runaway message_agent chain.
_MAX_QUIET_NOTIFY_ROUNDS = 8


@contextlib.contextmanager
def bind_quiet_session_key(session_id: str):
    """Bind the approval/session key to *this* quiet session for the enclosing ``with`` block."""
    from tools.approval_context import reset_current_session_key, set_current_session_key

    token = set_current_session_key(session_id or "default")
    try:
        yield
    finally:
        reset_current_session_key(token)


def quiet_notify_linger_seconds() -> float:
    """Total linger budget for one quiet run: the shared ``terminal.oneshot_completion_wait_seconds``.

    One budget covers the drain loop here AND the later ``_wait_for_oneshot_background_completions``
    pass, so a stuck ``notify_on_complete`` child cannot stack round-after-round waits on top of the
    finalize re-wait (pre-fix worst case: 8 rounds x 600s + 600s).
    """
    from tools.process_registry import ProcessRegistry

    return ProcessRegistry._oneshot_completion_wait_seconds()


def continue_quiet_notify_completions(
    session_id: str,
    run_turn: Callable[[str], Any],
    *,
    owns_event=None,
    max_rounds: int = _MAX_QUIET_NOTIFY_ROUNDS,
    linger_budget: float | None = None,
) -> Any:
    """Linger for ``notify_on_complete`` work, then run owned completion texts as follow-up turns.

    Returns the last ``run_turn`` result, or ``None`` when nothing owned completed. The whole
    loop shares ONE linger budget (default: ``terminal.oneshot_completion_wait_seconds``) — a
    process that times out is waited on no further this run: after the current round's drained
    texts run, the loop stops (the finalize linger still covers it once, bounded, via the
    budget handshake below).
    """
    from tools.process_registry import process_registry
    from tools.async_delegation import claim_event_delivery, complete_event_delivery

    last: Any = None
    key = session_id or ""
    if linger_budget is None:
        linger_budget = quiet_notify_linger_seconds()
    deadline = time.monotonic() + max(float(linger_budget), 0.0)
    for _ in range(max_rounds):
        wait = process_registry.wait_for_pending_completions(None, timeout=max(deadline - time.monotonic(), 0.0))
        drained = []
        for event, text in process_registry.drain_notifications(session_key=key, owns_event=owns_event):
            # Durable async_delegation events carry a delivery ledger: without the
            # claim/complete handshake the row stays delivery_state='pending' and
            # restore_undelivered_completions re-queues it on the next process start,
            # injecting the same result twice. Same contract as every other drain consumer.
            claim = claim_event_delivery(event, "cli-quiet")
            if claim is None:
                continue
            complete_event_delivery(event, claim)
            drained.append((event, text))
        # Every drained event type carries formatted text (completions, watch matches,
        # async_delegation results): drain_notifications POPS owned events off the queue,
        # so filtering by type here would consume-and-silently-drop owned
        # async_delegation results. Keep everything that rendered.
        texts = [text for _event, text in drained if text]
        if texts:
            last = run_turn("\n\n".join(texts))
        if wait.get("timed_out"):
            break
        if not texts:
            return last
    return last