# backend/apps/hadis/management/commands/find_orphan_volumes.py

from django.core.management.base import BaseCommand
from apps.hadis.models import BookReference

class Command(BaseCommand):
    help = 'Prints the slugs of BookReferences that have volumes but no associated editions.'

    def handle(self, *args, **options):
        # فیلتر کردن رفرنس‌هایی که تعداد ادیشن‌های آن‌ها صفر است اما تعداد ولوم‌های آن‌ها بیشتر از صفر است
        orphaned_references = BookReference.objects.filter(
            editions__isnull=True,
            volumes__isnull=False
        ).distinct()

        if not orphaned_references.exists():
            self.stdout.write(self.style.SUCCESS("✅ No orphaned volumes found. All volumes have associated editions."))
            return

        self.stdout.write(self.style.WARNING("Found the following BookReference slugs (have volumes, no edition):"))
        self.stdout.write("-" * 40)

        for book in orphaned_references:
            self.stdout.write(f"Slug: {book.slug} | ID: {book.id}")

        self.stdout.write("-" * 40)
        self.stdout.write(self.style.SUCCESS(f"Total found: {orphaned_references.count()}"))