import logging
from typing import TYPE_CHECKING

from tortoise import timezone

from src import domain

if TYPE_CHECKING:
    from .. import Usecase

log = logging.getLogger(__name__)


async def handle_unsubscription(self: 'Usecase', user_telegram_id: int, channel_telegram_id: int) -> None:
    subscriber = await self.database.get_telegram_user(telegram_id=user_telegram_id)
    if not subscriber:
        log.warning('Subscriber not found for telegram_id: %s', user_telegram_id)
        return

    project = await self.database.get_project_by_channel_telegram(channel_telegram_id)
    if not project:
        log.warning('Project not found for channel telegram_id: %s', channel_telegram_id)
        return

    subscriptions = await self.database.get_active_subscriptions_by_subscriber_and_project(subscriber.id, project.id)

    if not subscriptions:
        log.info(
            'No active subscriptions found for subscriber %s (telegram_id: %s) in channel %s',
            subscriber.id,
            user_telegram_id,
            channel_telegram_id,
        )
        return

    for subscription in subscriptions:
        subscription.status = domain.SubscriptionStatus.UNSUBSCRIBED
        subscription.unsubscribed_at = timezone.now()
        await self.database.update_subscription(subscription)

        log.info(
            'Subscription marked as unsubscribed: subscriber %s (telegram_id: %s) unsubscribed from publication %s',
            subscriber.id,
            user_telegram_id,
            subscription.publication_id,
        )