import asyncio
import os
from logging.config import fileConfig

from sqlalchemy import pool

from alembic import context
from app.db import Base
from app.postgres import create_postgres_engine

config = context.config
if config.config_file_name:
    fileConfig(config.config_file_name)
database_url = os.environ["DATABASE_URL"]
config.set_main_option("sqlalchemy.url", database_url.replace("%", "%%"))
target_metadata = Base.metadata


def do_run_migrations(connection) -> None:
    context.configure(
        connection=connection,
        target_metadata=target_metadata,
        include_schemas=True,
        version_table_schema="han_app",
        compare_type=True,
    )
    with context.begin_transaction():
        context.run_migrations()


async def run_async_migrations() -> None:
    connectable = create_postgres_engine(database_url, poolclass=pool.NullPool)
    async with connectable.connect() as connection:
        await connection.run_sync(do_run_migrations)
    await connectable.dispose()


if context.is_offline_mode():
    context.configure(
        url=config.get_main_option("sqlalchemy.url"),
        target_metadata=target_metadata,
        literal_binds=True,
        include_schemas=True,
        version_table_schema="han_app",
    )
    with context.begin_transaction():
        context.run_migrations()
else:
    asyncio.run(run_async_migrations())