import os
import sys
from logging.config import fileConfig

from alembic import context
from sqlalchemy import engine_from_config, pool

# Add the project directory to the sys.path
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

# Import the SQLAlchemy models
from app.db.session import Base

# This is the Alembic Config object
config = context.config

# Interpret the config file for Python logging
fileConfig(config.config_file_name)

# Set target metadata for autogenerate
target_metadata = 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.
    """
    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,
    )

    with connectable.connect() as connection:
        is_sqlite = connection.dialect.name == "sqlite"
        context.configure(
            connection=connection,
            target_metadata=target_metadata,
            render_as_batch=is_sqlite,  # This is important for SQLite to handle migrations properly
        )

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


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