"""JARVIS warnings tasks."""
import asyncio
import logging
from datetime import datetime, timedelta, timezone

from jarvis_core.db import q
from jarvis_core.db.models import Temprole
from naff import Client

from jarvis_tasks.util import runat

queue = []
logger = logging.getLogger(__name__)


async def _remove(bot: Client, temprole: Temprole) -> None:
    logger.debug(f"Removing temprole {temprole.id}")
    guild = await bot.fetch_guild(temprole.guild)
    if not guild:
        logger.warn(f"Temprole {temprole.id} invalid")
        await temprole.delete()
        return

    user = await guild.fetch_member(temprole.user)
    if not user:
        logger.warn(f"Temprole {temprole.id} invalid")
        await temprole.delete()
        return

    role = await guild.fetch_role(temprole.role)
    if not role:
        logger.warn(f"Temprole {temprole.id} invalid")
        await temprole.delete()
        return

    if user.has_role(role):
        try:
            await user.remove_role(role, "Temporary role expired")
        except Exception:
            logger.warn("Temprole failed to remove, ignoring")

    await temprole.delete()


async def remove(bot: Client) -> None:
    """
    Remove temproles when they expire.

    Args:
        bot: Client instance
    """
    logger.debug("Starting Task-remove")
    while True:
        max_ts = datetime.now(tz=timezone.utc) + timedelta(seconds=45)
        temproles = Temprole.find(q(expires_at__lte=max_ts, id__nin=queue))
        async for temprole in temproles:
            if temprole.id in queue:
                logger.warn("Temprole found despite filter")
                continue

            coro = _remove(bot, temprole)
            when = temprole.expires_at
            asyncio.create_task(runat(when, coro, logger))
            queue.append(temprole.id)
        # Check every minute
        await asyncio.sleep(60)