import org.dbflute.optional.OptionalThing;
import org.lastaflute.web.util.LaRequestUtil;

import jakarta.annotation.Resource;
import jakarta.servlet.http.HttpServletRequest;

/**
 * Client class for RAG (Retrieval-Augmented Generation) chat functionality.
 *
 * Orchestrates the multi-phase RAG workflow including session management,
 * document search, and delegation to LlmClientManager for LLM operations.

            }
            return returnUrl;
        }
        return null;
    }

    /**
     * Creates a stream response for document content delivery.
     * Handles content retrieval and streaming to the client.
     *
     * @param doc the document data map
     * @return the stream response containing document content
     * @throws FessSystemException if content cannot be retrieved
     */

            logger.warn("Failed to access groups/roles in Entra ID.", e);
        }
    }

    /**
     * Schedules asynchronous parent group lookup using TimeoutManager.
     * This method defers the retrieval of nested group information to avoid login delays.
     * @param user The Entra ID user.
     * @param initialGroups The initial group list to be updated.
     * @param initialRoles The initial role list to be updated.