from logging.config import fileConfig
import os

from sqlalchemy import create_engine
from alembic import context

# Import models for autogenerate support
from app.database import Base
from app.models import *

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config

# Interpret the config file for Python logging.
# This line sets up loggers basically.
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
target_metadata = Base.metadata

# other values from the config, defined by the needs of env.py,
# can be acquired:
# my_important_option = config.get_main_option("my_important_option")
# ... etc.

def run_migrations_online() -> None:
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

    """
    SQLALCHEMY_DATABASE_URL = os.getenv("CS_DATABASE_URL", "sqlite:///./simple-ocpp-cs.db")

    if SQLALCHEMY_DATABASE_URL.startswith("sqlite"):
        connectable = create_engine(
            SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
        )
    else:
        connectable = create_engine(SQLALCHEMY_DATABASE_URL)

    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():
    raise NotImplementedError("Offline migration is not supported")
else:
    run_migrations_online()