from django.db import migrations


def normalize_existing_identifiers(apps, schema_editor):
    digit_map = str.maketrans('۰۱۲۳۴۵۶۷۸۹٠١٢٣٤٥٦٧٨٩', '01234567890123456789')
    for name in ('PaymentNotice', 'PaymentReceiptRevision'):
        records = apps.get_model('payments', name).objects.using(schema_editor.connection.alias)
        for pk, original in records.exclude(deposit_id='').values_list('pk', 'deposit_id').iterator(chunk_size=500):
            value = original.translate(digit_map).strip()
            normalized = (value.lstrip('0') or '0') if value else ''
            if normalized != original:
                records.filter(pk=pk).update(deposit_id=normalized)


class Migration(migrations.Migration):
    dependencies = [('payments', '0005_paymentnotice_deleted_at')]
    operations = [migrations.RunPython(normalize_existing_identifiers, migrations.RunPython.noop)]