"""Alembic environment — bound to the Flask app's SQLAlchemy URL + metadata."""
from logging.config import fileConfig

from alembic import context

from app.config import Config
from app.db import Base
from app import models  # noqa: F401  -- register all models on Base.metadata

config = context.config
if config.config_file_name:
    fileConfig(config.config_file_name)

config.set_main_option("sqlalchemy.url", Config.SQLALCHEMY_DATABASE_URI)
target_metadata = Base.metadata


def run_migrations_offline() -> None:
    context.configure(
        url=Config.SQLALCHEMY_DATABASE_URI,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )
    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online() -> None:
    from sqlalchemy import create_engine
    engine = create_engine(Config.SQLALCHEMY_DATABASE_URI, future=True)
    with engine.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()