"""Follow-up after a crisis (clinical review 2026-10-04: «план безопасности и звонок после кризиса — обязательно»).

Every crisis — from the safety lexicon, a rule (PHQ-9 item 9, C-SSRS high) or the questionnaire (red flags, high
risk) — leaves a task for the doctor on duty: call the patient back, about 24 hours as a guide. The task is an alert
on the dashboard; «позвонили» is its acknowledgement (`repo.ack_alert`, audited). One open task per patient: a
repeated crisis signal does not pile up callbacks. On the next day the app itself asks how the person is, with the
safety plan at hand (`app/scheduler/jobs.py`).
"""

from datetime import datetime, timedelta

from sqlalchemy.ext.asyncio import AsyncSession

from app.core.types import AlertLevel
from app.db import repo
from app.db.clinical import Alert

POST_CRISIS_CALL = "post_crisis_call"
ON_DUTY = "on-duty"
CALL_WITHIN = timedelta(hours=24)  # a guide, not a guarantee
NEXT_DAY_CHECK_AFTER = timedelta(hours=20)


async def schedule_post_crisis_call(session: AsyncSession, token: str, now: datetime, *, source: str) -> Alert | None:
    if POST_CRISIS_CALL in await repo.open_alert_codes(session, token):
        return None
    return await repo.add_alert(
        session,
        token=token,
        level=AlertLevel.HIGH,
        code=POST_CRISIS_CALL,
        reason="Перезвонить пациенту после кризиса — дежурный специалист, ориентир 24 ч. Отметка «позвонили» — "
        "подтверждение этого сигнала.",
        ts=now,
        params={"due_at": (now + CALL_WITHIN).isoformat(), "assignee": ON_DUTY, "source": source},
    )


def next_day_check_due(crisis: dict | None, now: datetime) -> bool:
    """The day after a crisis the app asks how the person is — once per crisis episode."""
    if not crisis or not crisis.get("opened_at") or crisis.get("followup_sent"):
        return False
    return now - datetime.fromisoformat(crisis["opened_at"]) >= NEXT_DAY_CHECK_AFTER