"""Reminders: nag via ntfy when present-but-unpointed or departed-but-not-depointed."""
import asyncio
import urllib.request
from datetime import datetime

from models import list_users, load_notif_config, load_presence, load_week_pointages

NTFY_BASE = "https://ntfy.sh"
CHECK_INTERVAL_SECONDS = 300
RAPPEL_DEBUT_H = 7
RAPPEL_FIN_H = 20


def send_ntfy(topic: str, message: str, title: str):
    req = urllib.request.Request(
        f"{NTFY_BASE}/{topic}",
        data=message.encode("utf-8"),
        headers={"Title": title.encode("utf-8"), "Priority": "high"},
        method="POST",
    )
    try:
        urllib.request.urlopen(req, timeout=10).close()
    except Exception:
        pass  # best-effort: a missed reminder isn't worth crashing the loop


def _todays_pointage(user_id: str, today: datetime) -> dict:
    iso = today.isocalendar()
    pointages = load_week_pointages(iso.year, iso.week, user_id)
    date_str = today.strftime("%Y-%m-%d")
    return next((p for p in pointages if p["date"] == date_str), {})


async def check_user(user_id: str, now: datetime):
    notif = load_notif_config(user_id)
    topic = notif.get("ntfy_topic")
    if not topic:
        return
    if now.weekday() >= 5 or not (RAPPEL_DEBUT_H <= now.hour < RAPPEL_FIN_H):
        return

    presence = load_presence(user_id)
    jour = _todays_pointage(user_id, now)

    if presence.get("present") and not jour.get("matin_entree"):
        await asyncio.to_thread(send_ntfy, topic, "Tu es dans les locaux mais pas encore pointé ce matin.", "⏰ Pense à pointer")
    elif not presence.get("present") and jour.get("matin_entree") and not jour.get("aprem_sortie"):
        await asyncio.to_thread(send_ntfy, topic, "Tu as quitté les locaux sans dépointer la sortie.", "⏰ Pense à dépointer")


async def reminder_loop():
    while True:
        now = datetime.now()
        for user_id in list_users():
            await check_user(user_id, now)
        await asyncio.sleep(CHECK_INTERVAL_SECONDS)