database.py

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
import os
from dotenv import load_dotenv

load_dotenv()

DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./vegetable_detections.db")

engine = create_engine(
    DATABASE_URL, connect_args={"check_same_thread": False} if "sqlite" in DATABASE_URL else {}
)

SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

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

def init_db():
    """Initialize database tables"""
    # Import here to avoid circular imports
    from models import Detection
    Base.metadata.create_all(bind=engine)