import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

/**
 * Helper class for indexing operations in the Fess search engine.
 * This class provides functionality for sending documents to the search engine,
 * managing document lifecycle operations (create, update, delete), and handling
 * thumbnail processing during indexing.
 *

    public static final String ROLE_ASSISTANT = "assistant";

    /** The unique identifier for this message. */
    private String id;

    /** The role of the message sender (user or assistant). */
    private String role;

    /** The content of the message. */
    private String content;

    /** The timestamp when the message was created. */
    private LocalDateTime timestamp;

        // Execute
        String result = pingSearchEngineJob.execute();

        // Assert
        assertEquals("Status of test-cluster is changed to RED.", result);
        // Note: Notification sending is tested but we don't verify the mock since it uses complex callback mechanism
    }

    // Test state change with empty notification addresses
    @Test

    /**
     * Default constructor.
     */
    public CoordinatorHelper() {
        // Default constructor
    }

    /**
     * Initializes the coordinator by sending an initial heartbeat and starting the poll loop.
     */
    @PostConstruct
    public void init() {
        instanceId = ComponentUtil.getSystemHelper().getInstanceId();

    }

    /**
     * Bind event handlers
     */
    function bindEvents() {
        elements.sendBtn.on('click', sendMessage);

        elements.chatInput.on('keydown', function(e) {
            // Prevent sending during IME composition (Japanese, Chinese, etc.)
            if (e.key === 'Enter' && !e.shiftKey && !e.isComposing) {
                e.preventDefault();
                sendMessage();
            }
        });