from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from .config import settings

# Connection Pooling Configuration
engine = create_engine(
    settings.DATABASE_URL,
    pool_size=10,  # Number of connections to maintain
    max_overflow=20,  # Additional connections beyond pool_size
    pool_pre_ping=True,  # Verify connections before using
    pool_recycle=3600,  # Recycle connections after 1 hour
    echo=False  # Set to True for SQL query logging
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()