from logging.config import fileConfig

from sqlalchemy import create_engine
from sqlalchemy import pool

from alembic import context
from api.settings import get_app_config_engine

# 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
from api import db
target_metadata = db.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.
#
#     """
#     url = config.get_main_option("sqlalchemy.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():
    """Run migrations in 'online' mode.

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

    """
    # connectable = engine_from_config(
    #     config.get_section(config.config_ini_section),
    #     prefix="sqlalchemy.",
    #     poolclass=pool.NullPool,
    # )
    app_config_engine = get_app_config_engine()
    connectable = create_engine(app_config_engine.SQLALCHEMY_DATABASE_URI, echo=True, future=True)

    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()
run_migrations_online()