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

sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))

from app.models import Base
from app.config import settings

config = context.config

if config.config_file_name is not None:
    fileConfig(config.config_file_name)

target_metadata = Base.metadata

_driver = "postgresql+pg8000://" if "pg8000" in settings.DATABASE_URL else "postgresql+psycopg2://"
config.set_main_option("sqlalchemy.url", settings.DATABASE_URL.replace("postgresql://", _driver).replace("postgresql+psycopg2://", _driver))


def run_migrations_offline() -> None:
    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() -> None:
    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()
