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 from environment variable
DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./mcp_server.db")

# Create SQLAlchemy engine
engine = create_engine(
    DATABASE_URL,
    # SQLite specific setting
    connect_args={"check_same_thread": False} if "sqlite" in DATABASE_URL else {}
)

# Create SessionLocal class
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

# Create Base class
Base = declarative_base()

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