import logging
import mysql.connector

logger = logging.getLogger(__name__)

def connetti_db(cfg):
    """
    Establishes a connection to a MySQL database.

    Args:
        cfg: A configuration object containing database connection parameters.
             It should have the following attributes:
                 - dbuser: The database username.
                 - dbpass: The database password.
                 - dbhost: The database host address.
                 - dbport: The database port number.
                 - dbname: The name of the database to connect to.

    Returns:
        A MySQL connection object if the connection is successful, otherwise None.
    """
    try:
        conn = mysql.connector.connect(user=cfg.dbuser, password=cfg.dbpass, host=cfg.dbhost, port=cfg.dbport, database=cfg.dbname)
        conn.autocommit = True
        logger.info("Connected")
        return conn
    except mysql.connector.Error as e:
        logger.error(f"Database connection error: {e}")
        raise  # Re-raise the exception to be handled by the caller