/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.search.aggregations;

import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.query.WrapperQueryBuilder;
import org.elasticsearch.search.aggregations.bucket.filter.FiltersAggregationBuilder;
import org.elasticsearch.search.aggregations.bucket.filter.FiltersAggregator;
import org.elasticsearch.search.aggregations.bucket.filter.InternalFilters;
import org.elasticsearch.test.ESSingleNodeTestCase;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentFactory;
import org.elasticsearch.xcontent.XContentType;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class FiltersAggsRewriteIT extends ESSingleNodeTestCase {

    public void testWrapperQueryIsRewritten() throws IOException {
        createIndex("test", Settings.EMPTY, "test", "title", "type=text");
        client().prepareIndex("test").setId("1").setSource("title", "foo bar baz").get();
        client().prepareIndex("test").setId("2").setSource("title", "foo foo foo").get();
        client().prepareIndex("test").setId("3").setSource("title", "bar baz bax").get();
        client().admin().indices().prepareRefresh("test").get();

        XContentType xContentType = randomFrom(XContentType.values());
        BytesReference bytesReference;
        try (XContentBuilder builder = XContentFactory.contentBuilder(xContentType)) {
            builder.startObject();
            {
                builder.startObject("terms");
                {
                    builder.array("title", "foo");
                }
                builder.endObject();
            }
            builder.endObject();
            bytesReference = BytesReference.bytes(builder);
        }
        FiltersAggregationBuilder builder = new FiltersAggregationBuilder(
            "titles",
            new FiltersAggregator.KeyedFilter("titleterms", new WrapperQueryBuilder(bytesReference))
        );
        Map<String, Object> metadata = new HashMap<>();
        metadata.put(randomAlphaOfLengthBetween(1, 20), randomAlphaOfLengthBetween(1, 20));
        builder.setMetadata(metadata);
        SearchResponse searchResponse = client().prepareSearch("test").setSize(0).addAggregation(builder).get();
        assertEquals(3, searchResponse.getHits().getTotalHits().value);
        InternalFilters filters = searchResponse.getAggregations().get("titles");
        assertEquals(1, filters.getBuckets().size());
        assertEquals(2, filters.getBuckets().get(0).getDocCount());
        assertEquals(metadata, filters.getMetadata());
    }
}
