"""Database connection and session management"""

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from app.core.config import get_settings

settings = get_settings()

# Create database engine
engine = create_engine(
    settings.database_url,
    echo=settings.database_echo,
    pool_pre_ping=True,  # Verify connections before using them
    pool_recycle=3600,   # Recycle connections every hour
)

# Create session factory
SessionLocal = sessionmaker(
    bind=engine,
    autocommit=False,
    autoflush=False,
    expire_on_commit=False,
)

# Create declarative base for models
Base = declarative_base()


def get_db():
    """Dependency for FastAPI to get database session"""
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()