from __future__ import annotations
import os
from logging.config import fileConfig
from sqlalchemy import engine_from_config, pool
from alembic import context

config = context.config
# Подменяем URL из переменных окружения контейнера
if os.getenv("DATABASE_URL"):
    config.set_main_option("sqlalchemy.url", os.getenv("DATABASE_URL"))

fileConfig(config.config_file_name)

# Метаданные моделей
from app.models.base import Base  # noqa: E402
target_metadata = Base.metadata

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

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