import org.codelibs.fess.util.RenderDataUtil;
import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;

import jakarta.annotation.Resource;

/**
 * Action class for the RAG chat page.
 *
 * @author FessProject
 */
public class ChatAction extends FessSearchAction {

    private static final Logger logger = LogManager.getLogger(ChatAction.class);

    /**
     * Default constructor.

 * Implementations provide integration with different LLM providers
 * such as Ollama, OpenAI, and Google Gemini.
 *
 * In addition to low-level chat operations, this interface defines
 * high-level RAG workflow methods that allow each provider to optimize
 * prompt construction, parameter tuning, and response parsing.
 */
public interface LlmClient {

    /**
     * Performs a chat completion request.
     *