from logging.config import fileConfig

from alembic import context
from sqlalchemy import pool
from sqlalchemy.ext.asyncio import async_engine_from_config

from backend import models  # noqa: F401
from backend.config import get_settings
from backend.db import Base

config = context.config
config.set_main_option("sqlalchemy.url", get_settings().database_url)
if config.config_file_name:
    fileConfig(config.config_file_name)
target_metadata = Base.metadata


def run_migrations_offline():
    context.configure(url=config.get_main_option("sqlalchemy.url"), target_metadata=target_metadata, literal_binds=True, dialect_opts={"paramstyle":"named"})
    with context.begin_transaction(): context.run_migrations()


def do_run_migrations(connection):
    context.configure(connection=connection, target_metadata=target_metadata)
    with context.begin_transaction():
        context.run_migrations()


async def run_async_migrations():
    connectable = async_engine_from_config(
        config.get_section(config.config_ini_section),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )
    async with connectable.connect() as connection:
        await connection.run_sync(do_run_migrations)
    await connectable.dispose()


def run_migrations_online():
    import asyncio
    asyncio.run(run_async_migrations())


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