import databases
import pytest
import sqlalchemy

import ormar
from tests.settings import DATABASE_URL

database = databases.Database(DATABASE_URL, force_rollback=True)
metadata = sqlalchemy.MetaData()


class BaseMeta(ormar.ModelMeta):
    database = database
    metadata = metadata


class Category(ormar.Model):
    class Meta(BaseMeta):
        tablename = "categories"

    id: int = ormar.Integer(primary_key=True)
    name: str = ormar.String(max_length=40)


class PostCategory(ormar.Model):
    class Meta(BaseMeta):
        tablename = "posts_x_categories"

    id: int = ormar.Integer(primary_key=True)
    sort_order: int = ormar.Integer(nullable=True)


class Post(ormar.Model):
    class Meta(BaseMeta):
        pass

    id: int = ormar.Integer(primary_key=True)
    title: str = ormar.String(max_length=200)
    categories = ormar.ManyToMany(Category, through=PostCategory)


@pytest.fixture(autouse=True, scope="module")
async def create_test_database():
    engine = sqlalchemy.create_engine(DATABASE_URL)
    metadata.create_all(engine)
    yield
    metadata.drop_all(engine)


@pytest.mark.asyncio
async def test_setting_fields_on_through_model():
    async with database:
        # TODO: check/ modify following
        # loading the data into model instance of though model?
        # <- attach to other side? both sides? access by through, or add to fields?
        # creating while adding to relation (kwargs in add?)
        # creating in query (dividing kwargs between final and through)
        # updating in query
        # sorting in filter (special __through__<field_name> notation?)
        # ordering by in order_by
        # accessing from instance (both sides?)
        # modifying from instance (both sides?)
        # including/excluding in fields?
        # allowing to change fk fields names in through model?
        pass