"""
daemon.py - Background polling loop for scheduled tasks

Override poll_callback() with your domain-specific logic.
"""

import os
import time
import logging

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

POLL_INTERVAL = int(os.environ.get("POLL_INTERVAL", 60))


def check_medication_reminders():
    """Check for medications due now and send notifications."""
    # TODO: query medications table for doses due within the poll window
    # TODO: cross-ref med_logs to skip already-taken doses
    # TODO: send via core.notifications._sendToEnabledChannels()
    pass


def check_routine_reminders():
    """Check for scheduled routines due now and send notifications."""
    # TODO: query routine_schedules for routines due within the poll window
    # TODO: send via core.notifications._sendToEnabledChannels()
    pass


def check_refills():
    """Check for medications running low on refills."""
    # TODO: query medications where quantity_remaining is low
    # TODO: send refill reminder via notifications
    pass


def poll_callback():
    """Called every POLL_INTERVAL seconds."""
    check_medication_reminders()
    check_routine_reminders()
    check_refills()


def daemon_loop():
    logger.info("Scheduler daemon starting")
    while True:
        try:
            poll_callback()
        except Exception as e:
            logger.error(f"Poll callback error: {e}")
        time.sleep(POLL_INTERVAL)


if __name__ == "__main__":
    daemon_loop()