import org.lastaflute.web.util.LaRequestUtil;
import org.opensearch.action.search.SearchRequestBuilder;
import org.opensearch.action.search.SearchResponse;
import org.opensearch.common.document.DocumentField;
import org.opensearch.search.SearchHit;
import org.opensearch.search.SearchHits;
import org.opensearch.search.aggregations.Aggregations;
import org.opensearch.search.fetch.subphase.highlight.HighlightField;

/**

- [Customization Guide](https://github.com/codelibs/fess-site-search)

---

### Elasticsearch / OpenSearch

If you're migrating from a standalone Elasticsearch or OpenSearch deployment:

#### Document Migration

**Step 1: Export from Source**

Export documents from your existing Elasticsearch/OpenSearch cluster:

```bash
# Using elasticdump
elasticdump \
  --input=http://old-es-server:9200/my-index \

indexer.language.fields=content,important_content,title
```

## Optional: Search Analysis Support

If your language requires special text analysis (stemming, stop words, etc.), you may need to configure OpenSearch analyzers.

### 1. Update OpenSearch Index Template

Edit `src/main/resources/fess_indices/fess.json` to add language-specific analyzers.

**Example for Swedish:**
```json
{
  "analysis": {
    "filter": {

import org.lastaflute.di.core.external.GenericExternalContextComponentDefRegister;
import org.lastaflute.di.core.factory.SingletonLaContainerFactory;
import org.opensearch.monitor.jvm.JvmInfo;
import org.opensearch.monitor.os.OsProbe;
import org.opensearch.monitor.process.ProcessProbe;

import jakarta.annotation.Resource;

/**
 * This class is a command-line application for creating and managing the suggest index.

     */
    protected ResourceUtil() {
        // nothing
    }

    /**
     * Gets the HTTP URL for the OpenSearch (Fesen) server.
     * First checks for a system-configured search engine address,
     * then falls back to the URL configured in FessConfig.
     *
     * @return the HTTP URL for the OpenSearch server
     */
    public static String getFesenHttpUrl() {

import org.lastaflute.core.message.UserMessages;
import org.opensearch.common.unit.Fuzziness;
import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;
import org.opensearch.search.sort.SortOrder;

/**
 * Command class for handling term query execution and conversion.
 * This class processes Lucene TermQuery objects and converts them to OpenSearch QueryBuilder instances.
 */

import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.opensearch.config.exbhv.BadWordBhv;
import org.codelibs.fess.opensearch.config.exbhv.ElevateWordBhv;
import org.codelibs.fess.opensearch.config.exentity.BadWord;
import org.codelibs.fess.opensearch.config.exentity.ElevateWord;
import org.codelibs.fess.opensearch.log.exbhv.SearchLogBhv;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInfo;
import org.opensearch.search.rescore.QueryRescorerBuilder;
import org.opensearch.search.rescore.RescorerBuilder;

public class LtrQueryRescorerTest extends UnitFessTestCase {

    private LtrQueryRescorer ltrQueryRescorer;

    @Override

    }

    @Test
    public void test_searchWithQuery_validQuery() {
        chatClient.resetSearchDocumentsCalled();
        chatClient.testSearchWithQuery("OpenSearch tutorial");
        assertTrue(chatClient.wasSearchDocumentsCalled());
    }

    @Test
    public void test_searchWithQuery_validFieldQuery() {
        chatClient.resetSearchDocumentsCalled();

import org.opensearch.OpenSearchException;
import org.opensearch.action.DocWriteResponse.Result;
import org.opensearch.action.bulk.BulkRequestBuilder;
import org.opensearch.action.bulk.BulkResponse;
import org.opensearch.action.update.UpdateRequestBuilder;
import org.opensearch.action.update.UpdateResponse;
import org.opensearch.common.document.DocumentField;
import org.opensearch.index.query.BoolQueryBuilder;