from logging.config import fileConfig

from alembic import context
from sqlalchemy import engine_from_config, pool

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
from bytes.config import get_settings
from bytes.database.db_models import SQL_BASE

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
target_metadata = SQL_BASE.metadata
config.set_main_option("sqlalchemy.url", str(get_settings().db_uri))

# other values from the config, defined by the needs of env.py,
# can be acquired:
# ... 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 = 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() -> None:
    """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
    )

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

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


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