# Generated by Django 3.2.23 on 2024-02-04 20:27

import bookwyrm.models.fields
from django.db import migrations, models
import django.db.models.deletion


def make_series(apps, schema_editor):
    Edition = apps.get_model("bookwyrm", "Edition")
    Series = apps.get_model("bookwyrm", "Series")
    SeriesBook = apps.get_model("bookwyrm", "SeriesBook")

    db_alias = schema_editor.connection.alias

    with_series = (
        Edition.objects.using(db_alias)
        .exclude(series_name__isnull=True)
        .exclude(series_name__exact="")
        .order_by("series_name", "series_number")
    )
    for edition in with_series:
        # TODO: Try to parse number from series_name if series_number is empty?
        series, _ = Series.objects.using(db_alias).get_or_create(
            name=edition.series_name,
            authors=edition.authors.all(),
        )
        SeriesBook.objects.using(db_alias).create(
            book=edition, series=series, number=edition.series_number
        )


class Migration(migrations.Migration):

    dependencies = [
        ("bookwyrm", "0205_merge_20240413_0232.py"),
    ]

    operations = [
        migrations.RenameField(
            model_name="book",
            old_name="series",
            new_name="series_name",
        ),
        migrations.CreateModel(
            name="Series",
            fields=[
                (
                    "id",
                    models.AutoField(
                        auto_created=True,
                        primary_key=True,
                        serialize=False,
                        verbose_name="ID",
                    ),
                ),
                ("created_date", models.DateTimeField(auto_now_add=True)),
                ("updated_date", models.DateTimeField(auto_now=True)),
                (
                    "remote_id",
                    bookwyrm.models.fields.RemoteIdField(
                        max_length=255,
                        null=True,
                        validators=[bookwyrm.models.fields.validate_remote_id],
                    ),
                ),
                ("name", bookwyrm.models.fields.CharField(max_length=100)),
                (
                    "authors",
                    bookwyrm.models.fields.ManyToManyField(to="bookwyrm.Author"),
                ),
            ],
            options={
                "abstract": False,
            },
        ),
        migrations.CreateModel(
            name="SeriesBook",
            fields=[
                (
                    "id",
                    models.AutoField(
                        auto_created=True,
                        primary_key=True,
                        serialize=False,
                        verbose_name="ID",
                    ),
                ),
                ("created_date", models.DateTimeField(auto_now_add=True)),
                ("updated_date", models.DateTimeField(auto_now=True)),
                (
                    "remote_id",
                    bookwyrm.models.fields.RemoteIdField(
                        max_length=255,
                        null=True,
                        validators=[bookwyrm.models.fields.validate_remote_id],
                    ),
                ),
                (
                    "number",
                    bookwyrm.models.fields.CharField(
                        blank=True, max_length=255, null=True
                    ),
                ),
                (
                    "book",
                    models.ForeignKey(
                        on_delete=django.db.models.deletion.PROTECT, to="bookwyrm.book"
                    ),
                ),
                (
                    "series",
                    models.ForeignKey(
                        on_delete=django.db.models.deletion.PROTECT,
                        to="bookwyrm.series",
                    ),
                ),
            ],
            options={
                "ordering": ["-number"],
                "unique_together": {("book", "series")},
            },
        ),
        migrations.AddField(
            model_name="series",
            name="books",
            field=bookwyrm.models.fields.ManyToManyField(
                related_name="series_books",
                through="bookwyrm.SeriesBook",
                to="bookwyrm.Book",
            ),
        ),
        migrations.AddField(
            model_name="book",
            name="series",
            field=models.ManyToManyField(
                through="bookwyrm.SeriesBook", to="bookwyrm.Series"
            ),
        ),
        migrations.RunPython(make_series),  # TODO: reverse_code
        migrations.RemoveField(
            model_name="book",
            name="series_number",
        ),
        migrations.RemoveField(
            model_name="book",
            name="series_name",
        ),
    ]