# ================================================================
# services/auth/app/core/database.py (ENHANCED VERSION)
# ================================================================
"""
Database configuration for authentication service
"""

import structlog
from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
from sqlalchemy.pool import NullPool

from app.core.config import settings
from shared.database.base import Base

logger = structlog.get_logger()

# Create async engine
engine = create_async_engine(
    settings.DATABASE_URL,
    poolclass=NullPool,
    echo=settings.DEBUG,
    future=True
)

# Create session factory
AsyncSessionLocal = async_sessionmaker(
    engine,
    class_=AsyncSession,
    expire_on_commit=False,
    autoflush=False,
    autocommit=False
)

async def get_db() -> AsyncSession:
    """Database dependency"""
    async with AsyncSessionLocal() as session:
        try:
            yield session
            await session.commit()
        except Exception as e:
            await session.rollback()
            logger.error(f"Database session error: {e}")
            raise
        finally:
            await session.close()

async def create_tables():
    """Create database tables"""
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)
    logger.info("Database tables created successfully")