from alembic import context
from sqlalchemy import create_engine

from aleph.vm.conf import make_sync_db_url

# Auto-generate migrations
from aleph.vm.orchestrator.metrics import 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.
# if config.config_file_name is not None:
#     fileConfig(config.config_file_name)


target_metadata = 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() -> None:
    """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.

    """
    url = make_sync_db_url()

    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )

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


def run_migrations_online() -> None:
    """Run migrations in 'online' mode.

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

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

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


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