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

from django.core.management.base import BaseCommand
from django.db import transaction
from apps.hadis.models import HadisInterpretation

class Command(BaseCommand):
    help = 'Syncs existing HadisInterpretation slugs with their Category slugs.'

    def handle(self, *args, **options):
        self.stdout.write(self.style.WARNING("Starting to sync interpretation slugs..."))

        # استفاده از select_related برای جلوگیری از N+1 Query روی Category
        interpretations = list(HadisInterpretation.objects.select_related('category').all())

        if not interpretations:
            self.stdout.write(self.style.ERROR("No HadisInterpretations found in the database."))
            return

        to_update = []
        for obj in interpretations:
            if obj.category and obj.category.slug:
                # فقط اگر اسلاگ فرق داشت آپدیت کن تا دیتابیس بی‌دلیل درگیر نشود
                if obj.slug != obj.category.slug:
                    obj.slug = obj.category.slug
                    to_update.append(obj)

        if to_update:
            with transaction.atomic():
                batch_size = 1000
                for i in range(0, len(to_update), batch_size):
                    HadisInterpretation.objects.bulk_update(
                        to_update[i:i + batch_size], 
                        ['slug']
                    )

            self.stdout.write(
                self.style.SUCCESS(f"\n🎉 Successfully synced slugs for {len(to_update)} interpretations!")
            )
        else:
            self.stdout.write(
                self.style.SUCCESS("\n✅ All interpretations already have the correct slug. Nothing to update.")
            )