from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
from sqlalchemy.orm import declarative_base
from ..core.config import settings
import contextlib

# Create async engine with pgbouncer configuration
async_engine = create_async_engine(
    "postgresql+asyncpg://postgres.mqyrkmsdgugdhxiucukb:Lovyelias5584.@aws-0-eu-central-1.pooler.supabase.com:6543/postgres",
    echo=True,
    future=True,
    pool_pre_ping=True,
    connect_args={
        "statement_cache_size": 0,  # Required for pgbouncer
        "prepared_statement_cache_size": 0  # Disable prepared statement cache
    }
)


AsyncSessionLocal = async_sessionmaker(
    bind=async_engine,
    class_=AsyncSession,
    expire_on_commit=False
)


Base = declarative_base()


async def get_db():
    async with AsyncSessionLocal() as session:
        try:
            yield session
        finally:
            await session.close()


class Database:
    def __init__(self):
        self._session_factory = AsyncSessionLocal

    @contextlib.asynccontextmanager
    async def session(self):
        """Get a database session with automatic commit/rollback"""
        session = self._session_factory()
        try:
            yield session
            await session.commit()
        except:
            await session.rollback()
            raise
        finally:
            await session.close()

    async def get_session(self):
        """Get a session for manual management"""
        return self._session_factory()


db = Database()