import time
import logging
from django.core.management.base import BaseCommand
from django.utils import timezone
from datetime import timedelta
from backlogger.models import Item
from backlogger import hltb as hltb_api

logger = logging.getLogger(__name__)

INITIAL_DELAY_SECONDS = 20
BETWEEN_LOOKUPS_SECONDS = 5
IDLE_POLL_SECONDS = 10


class Command(BaseCommand):
    help = 'Background worker: fetches HLTB data for newly created game items.'

    def handle(self, *args, **options):
        self.stdout.write('HLTB worker started.')
        while True:
            cutoff = timezone.now() - timedelta(seconds=INITIAL_DELAY_SECONDS)
            item = (
                Item.objects
                .filter(category=Item.GAMES, hltb_fetched=False, created_at__lte=cutoff)
                .order_by('created_at')
                .first()
            )
            if item is None:
                time.sleep(IDLE_POLL_SECONDS)
                continue

            self.stdout.write(f'Fetching HLTB for: {item.name} (id={item.pk})')
            try:
                hltb_api.apply_to_item(item)
            except Exception as e:
                logger.exception('HLTB lookup failed for item %s', item.pk)
                # Mark as fetched anyway to avoid retrying indefinitely
                item.hltb_fetched = True
                item.save(update_fields=['hltb_fetched'])

            time.sleep(BETWEEN_LOOKUPS_SECONDS)