from sqlalchemy import create_engine, MetaData, inspect

# Initialize database engine (Persistent SQLite)
engine = create_engine("sqlite:///database.db")
metadata_obj = MetaData()

# Function to check existing tables
def get_existing_tables():
    """
    Returns a list of existing tables in the database.

    Returns:
        list: List of table names.
    """
    inspector = inspect(engine)
    return inspector.get_table_names()

# Function to initialize database if empty
def initialize_database():
    """
    Checks if database is empty and prompts user to upload an SQL file if needed.
    """
    tables = get_existing_tables()
    if not tables:
        print("No tables found in the database. Please upload an SQL file.")
    else:
        print(f"Database initialized with tables: {tables}")

initialize_database()