from __future__ import annotations

from apscheduler.schedulers.background import BackgroundScheduler

from .reporting import send_due_reports
from .settings import get_bool_setting

_scheduler: BackgroundScheduler | None = None


def get_scheduler() -> BackgroundScheduler:
    global _scheduler
    if _scheduler is None:
        _scheduler = BackgroundScheduler(timezone='UTC')
    return _scheduler


def start_scheduler(app) -> None:
    if app.config.get('TESTING'):
        return
    if not get_bool_setting('report_scheduler_enabled', False):
        return
    scheduler = get_scheduler()
    if scheduler.running:
        return

    def _job():
        with app.app_context():
            send_due_reports()

    scheduler.add_job(_job, 'interval', minutes=60, id='send_due_reports', replace_existing=True)
    scheduler.start()