from logging.config import fileConfig

from alembic import context
from sqlalchemy import engine_from_config, pool

import app.models  # noqa: F401  (register tables)
from app.config import settings
from app.db import Base

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


def run_migrations_offline() -> None:
    context.configure(url=settings.database_url, target_metadata=target_metadata, literal_binds=True)
    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    connectable = engine_from_config(config.get_section(config.config_ini_section), prefix="sqlalchemy.",
                                     poolclass=pool.NullPool)
    with connectable.connect() as connection:
        # Batch mode rebuilds tables for ALTERs that SQLite cannot do in place (local dev only).
        context.configure(connection=connection, target_metadata=target_metadata,
                          render_as_batch=connection.dialect.name == "sqlite")
        with context.begin_transaction():
            context.run_migrations()


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