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

# Ensure data directory exists for SQLite
if settings.DATABASE_URL.startswith("sqlite"):
    os.makedirs("./data", exist_ok=True)

# Create engine with appropriate settings based on database type
if settings.DATABASE_URL.startswith("sqlite"):
    engine = create_engine(
        settings.DATABASE_URL,
        connect_args={"check_same_thread": False}
    )
else:
    engine = create_engine(settings.DATABASE_URL)

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

Base = declarative_base()

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