import os
from logging.config import fileConfig

from sqlalchemy import engine_from_config, pool

from alembic import context
from jobbergate_api.apps.clusters import models  # noqa # must be imported for metadata to work
from jobbergate_api.apps.job_script_templates import models  # noqa # must be imported for metadata to work
from jobbergate_api.apps.job_scripts import models  # noqa # must be imported for metadata to work
from jobbergate_api.apps.job_submissions import models  # noqa # must be imported for metadata to work
from jobbergate_api.apps.models import Base

# from jobbergate_api.metadata import (
#    metadata as jobbergate_api_metadata,
# )  # noqa # must be imported for metadata to work
from jobbergate_api.storage import build_db_url

# 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.
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 = [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.

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

    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.

    """
    ini_section = config.get_section(config.config_ini_section)
    ini_section["sqlalchemy.url"] = build_db_url(
        asynchronous=False,
        override_db_name=os.environ.get("DATABASE_NAME")
    )
    connectable = engine_from_config(
        ini_section,
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    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()
