# Copyright 2026 Cloudbase Solutions Srl
# All Rights Reserved.

from alembic import context
from sqlalchemy import engine_from_config
from sqlalchemy import pool

from coriolis.db.sqlalchemy import models

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

# this is the MetaData object for the various models in the database.
target_metadata = models.BASE.metadata


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,
        render_as_batch=True,
        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 = config.attributes.get("connection", None)

    if connectable is not None:
        context.configure(
            connection=connectable,
            target_metadata=target_metadata,
            render_as_batch=True,
        )

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

    # only create Engine if we don't have a Connection from the outside.
    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,
            render_as_batch=True,
        )

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


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