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

import random
from django.core.management.base import BaseCommand
from django.db import transaction
from apps.hadis.models import BookReference, BookEdition

class Command(BaseCommand):
    help = 'Makes 50% of BookReferences independent by deleting their BookEditions.'

    def handle(self, *args, **options):
        all_books = list(BookReference.objects.all())
        if not all_books:
            self.stdout.write(self.style.ERROR("No books found."))
            return

        # انتخاب ۵۰ درصد رندوم
        num_to_detach = len(all_books) // 2
        books_to_detach = random.sample(all_books, num_to_detach)

        self.stdout.write(self.style.WARNING(f"Deleting editions from {num_to_detach} books..."))

        with transaction.atomic():
            # حذف تمام ادیشن‌های مرتبط با این ۵۰ درصد کتاب
            BookEdition.objects.filter(book_reference__in=books_to_detach).delete()

        self.stdout.write(self.style.SUCCESS(f"✅ {num_to_detach} books are now independent (no editions)."))