from django.conf import settings
from django.db import migrations, models
import django.db.models.deletion


def orphans(apps, schema_editor):
    # Every project has an owner, and none of the ones saved before owners did.
    apps.get_model("clips", "Project").objects.all().delete()


class Migration(migrations.Migration):

    dependencies = [
        ("clips", "0007_symbols_not_timelines"),
        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
    ]

    operations = [
        migrations.RunPython(orphans, migrations.RunPython.noop),
        migrations.AddField(
            model_name="leaf",
            name="seq",
            field=models.PositiveBigIntegerField(
                default=0, help_text="the project seq of the write that last changed it"),
        ),
        migrations.AddField(
            model_name="project",
            name="editors",
            field=models.ManyToManyField(blank=True, related_name="shared_projects",
                                         to=settings.AUTH_USER_MODEL),
        ),
        migrations.AddField(
            model_name="project",
            name="owner",
            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE,
                                    related_name="projects", to=settings.AUTH_USER_MODEL),
            preserve_default=False,
        ),
    ]