"""
Alembic Environment Configuration
Handles both online and offline migration modes
"""
import asyncio
from logging.config import fileConfig

from sqlalchemy import pool
from sqlalchemy.engine import Connection
from sqlalchemy.ext.asyncio import async_engine_from_config

from alembic import context

# Import application config and models
from app.config import settings
from app.database import Base

# Import all models to register them with Base.metadata
from app.models import (
    User, Driver, DriverDocument, DriverAccountSettings, OfferProfile,
    Vehicle, VehicleCategory, Ride, FareBid, Wallet, Transaction, Payment, WithdrawalRequest,
    Rating, PromoCode, PromoUsage, Notification, SystemConfig, MapProviderConfig
)

# Alembic Config object
config = context.config

# Set database URL from environment
config.set_main_option("sqlalchemy.url", settings.get_database_url)

# Interpret the config file for Python logging
if config.config_file_name is not None:
    fileConfig(config.config_file_name)

# Model's MetaData object for 'autogenerate' support
target_metadata = Base.metadata


def run_migrations_offline() -> None:
    """
    Run migrations in 'offline' mode.
    
    This configures the context with just a URL and not an Engine,
    though an Engine is acceptable here as well. By skipping the Engine
    creation we don't even need a DBAPI to be available.
    
    Calls to context.execute() here emit the given string to the
    script output.
    """
    url = config.get_main_option("sqlalchemy.url")
    context.configure(
        url=url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
        compare_type=True,
        compare_server_default=True,
    )

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


def do_run_migrations(connection: Connection) -> None:
    """Run migrations with connection"""
    context.configure(
        connection=connection,
        target_metadata=target_metadata,
        compare_type=True,
        compare_server_default=True,
    )

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


async def run_async_migrations() -> None:
    """
    Run migrations in async mode.
    Creates an async Engine and associates a connection with the context.
    """
    connectable = async_engine_from_config(
        config.get_section(config.config_ini_section, {}),
        prefix="sqlalchemy.",
        poolclass=pool.NullPool,
    )

    async with connectable.connect() as connection:
        await connection.run_sync(do_run_migrations)

    await connectable.dispose()


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


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