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

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

class Command(BaseCommand):
    help = 'Assigns a default BookReference to HadisInterpretations that lack one.'

    def handle(self, *args, **options):
        self.stdout.write(self.style.WARNING("Scanning for interpretations without book references..."))

        # پیدا کردن تفسیرهایی که هیچ رفرنسی ندارند
        interpretations_without_book = HadisInterpretation.objects.filter(references__isnull=True)
        count = interpretations_without_book.count()

        if count == 0:
            self.stdout.write(self.style.SUCCESS("✅ All interpretations already have a book reference."))
            return

        # پیدا کردن اولین کتاب موجود در دیتابیس برای اتصال
        book = BookReference.objects.first()
        
        # اگر هیچ کتابی در سیستم ثبت نشده بود، یک کتاب پیش‌فرض می‌سازیم
        if not book:
            import time
            book = BookReference.objects.create(
                title=[{"language_code": "en", "text": "Default Source Book"}],
                slug=f"default-book-{int(time.time())}"
            )
            self.stdout.write(self.style.WARNING("No BookReference found. Created a default dummy book."))

        self.stdout.write(self.style.WARNING(f"Linking {count} interpretations to book ID: {book.id}..."))

        new_refs = []
        for interp in interpretations_without_book:
            new_refs.append(
                InterpretationReference(
                    interpretation=interp,
                    book_reference=book,
                    volume="",
                    pages="",
                    address=""
                )
            )

        # ساخت گروهی در دیتابیس
        with transaction.atomic():
            InterpretationReference.objects.bulk_create(new_refs, batch_size=500)

        self.stdout.write(
            self.style.SUCCESS(f"🎉 Successfully linked {len(new_refs)} interpretations to the book!")
        )