from unittest.mock import patch
import pytest
from szurubooru import api, db, model, errors
from szurubooru.func import tag_categories, tags, snapshots


@pytest.fixture(autouse=True)
def inject_config(config_injector):
    config_injector({
        'privileges': {'tag_categories:delete': model.User.RANK_REGULAR},
    })


def test_deleting(user_factory, tag_category_factory, context_factory):
    auth_user = user_factory(rank=model.User.RANK_REGULAR)
    category = tag_category_factory(name='category')
    db.session.add(tag_category_factory(name='root'))
    db.session.add(category)
    db.session.flush()
    with patch('szurubooru.func.snapshots.delete'):
        result = api.tag_category_api.delete_tag_category(
            context_factory(params={'version': 1}, user=auth_user),
            {'category_name': 'category'})
        assert result == {}
        assert db.session.query(model.TagCategory).count() == 1
        assert db.session.query(model.TagCategory).one().name == 'root'
        snapshots.delete.assert_called_once_with(category, auth_user)


def test_trying_to_delete_used(
        user_factory, tag_category_factory, tag_factory, context_factory):
    category = tag_category_factory(name='category')
    db.session.add(category)
    db.session.flush()
    tag = tag_factory(names=['tag'], category=category)
    db.session.add(tag)
    db.session.commit()
    with pytest.raises(tag_categories.TagCategoryIsInUseError):
        api.tag_category_api.delete_tag_category(
            context_factory(
                params={'version': 1},
                user=user_factory(rank=model.User.RANK_REGULAR)),
            {'category_name': 'category'})
    assert db.session.query(model.TagCategory).count() == 1


def test_trying_to_delete_last(
        user_factory, tag_category_factory, context_factory):
    db.session.add(tag_category_factory(name='root'))
    db.session.commit()
    with pytest.raises(tag_categories.TagCategoryIsInUseError):
        api.tag_category_api.delete_tag_category(
            context_factory(
                params={'version': 1},
                user=user_factory(rank=model.User.RANK_REGULAR)),
            {'category_name': 'root'})


def test_trying_to_delete_non_existing(user_factory, context_factory):
    with pytest.raises(tag_categories.TagCategoryNotFoundError):
        api.tag_category_api.delete_tag_category(
            context_factory(user=user_factory(rank=model.User.RANK_REGULAR)),
            {'category_name': 'bad'})


def test_trying_to_delete_without_privileges(
        user_factory, tag_category_factory, context_factory):
    db.session.add(tag_category_factory(name='category'))
    db.session.commit()
    with pytest.raises(errors.AuthError):
        api.tag_category_api.delete_tag_category(
            context_factory(
                params={'version': 1},
                user=user_factory(rank=model.User.RANK_ANONYMOUS)),
            {'category_name': 'category'})
    assert db.session.query(model.TagCategory).count() == 1
