"""APScheduler wrapper that ticks every minute and lets the checker decide
which feeds are due (per-feed intervals are evaluated in check_all_feeds)."""
from __future__ import annotations

import logging

from apscheduler.schedulers.asyncio import AsyncIOScheduler
from apscheduler.triggers.interval import IntervalTrigger

from .checker import check_all_feeds

log = logging.getLogger("scheduler")

_scheduler: AsyncIOScheduler | None = None
_JOB_ID = "check-feeds"
# Fixed tick; per-feed/global intervals are honoured inside check_all_feeds.
_TICK_SECONDS = 60


def start(interval_minutes: int) -> None:
    global _scheduler
    if _scheduler is not None:
        return
    _scheduler = AsyncIOScheduler(timezone="UTC")
    _scheduler.add_job(
        check_all_feeds,
        trigger=IntervalTrigger(seconds=_TICK_SECONDS),
        id=_JOB_ID,
        max_instances=1,
        coalesce=True,
        replace_existing=True,
    )
    _scheduler.start()
    log.info("Планировщик запущен (тик 60с), интервал по умолчанию %d мин", interval_minutes)


def reschedule(interval_minutes: int) -> None:
    # The global interval is read live by the checker each tick, so there is
    # nothing to reschedule — kept for API compatibility.
    log.info("Интервал по умолчанию изменён на %d мин", interval_minutes)


def shutdown() -> None:
    global _scheduler
    if _scheduler is not None:
        _scheduler.shutdown(wait=False)
        _scheduler = None