"""
Alembic Environment Configuration

Async migration environment for SQLAlchemy 2.0 with asyncpg.
"""
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 our models and config
from src.shared.config import get_settings
from src.shared.database import Base

# Import all models to ensure they're registered with Base.metadata
from src.domains.auth.models import User, Role, UserRole, UserPreferences, ApiKey  # noqa: F401
from src.domains.dashboard.models import QuickLink, DashboardWidget  # noqa: F401

# Alembic Config object
config = context.config

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

# Model metadata for autogenerate support
target_metadata = Base.metadata

# Get database URL from our settings
settings = get_settings()
db_url = settings.database_url
if db_url.startswith("postgresql://"):
    db_url = db_url.replace("postgresql://", "postgresql+asyncpg://", 1)


def run_migrations_offline() -> None:
    """
    Run migrations in 'offline' mode.

    Generates SQL script without connecting to the database.
    """
    context.configure(
        url=db_url,
        target_metadata=target_metadata,
        literal_binds=True,
        dialect_opts={"paramstyle": "named"},
    )

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


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

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


async def run_async_migrations() -> None:
    """
    Run migrations in 'online' mode with async engine.
    """
    configuration = config.get_section(config.config_ini_section) or {}
    configuration["sqlalchemy.url"] = db_url

    connectable = async_engine_from_config(
        configuration,
        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()