#
# Copyright 2015 Red Hat. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

"""A test module to exercise the Gnocchi API with gabbi."""

from alembic import context
from logging import config as logconfig

from gnocchi.indexer import sqlalchemy
from gnocchi.indexer import sqlalchemy_base

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# Interpret the config file for Python logging.
# This line sets up loggers basically.
logconfig.fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
target_metadata = sqlalchemy_base.Base.metadata

# other values from the config, defined by the needs of env.py,
# can be acquired:
# my_important_option = config.get_main_option("my_important_option")
# ... etc.


def run_migrations_offline():
    """Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

    """
    conf = config.conf
    context.configure(url=conf.indexer.url,
                      target_metadata=target_metadata)

    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online():
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

    """
    conf = config.conf
    indexer = sqlalchemy.SQLAlchemyIndexer(conf)
    indexer.connect()
    with indexer.facade.writer_connection() as connectable:

        with connectable.connect() as connection:
            context.configure(
                connection=connection,
                target_metadata=target_metadata
            )

            with context.begin_transaction():
                context.run_migrations()

    indexer.disconnect()

# If `alembic' was used directly from the CLI
if not hasattr(config, "conf"):
    from gnocchi import service
    config.conf = service.prepare_service([])

if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()
