/*
 * 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", the "GNU Affero General Public License v3.0 only", 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", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.index.mapper;

import org.elasticsearch.common.Strings;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.Aggregator.SubAggCollectionMode;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.test.ESIntegTestCase;
import org.elasticsearch.xcontent.XContentBuilder;
import org.elasticsearch.xcontent.XContentFactory;

import java.io.IOException;

import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertHitCount;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertResponse;
import static org.elasticsearch.xcontent.XContentFactory.jsonBuilder;
import static org.hamcrest.Matchers.equalTo;

public class CopyToMapperIntegrationIT extends ESIntegTestCase {
    public void testDynamicTemplateCopyTo() throws Exception {
        assertAcked(indicesAdmin().prepareCreate("test-idx").setMapping(createDynamicTemplateMapping()));

        int recordCount = between(1, 200);

        for (int i = 0; i < recordCount * 2; i++) {
            prepareIndex("test-idx").setId(Integer.toString(i)).setSource("test_field", "test " + i, "even", i % 2 == 0).get();
        }
        indicesAdmin().prepareRefresh("test-idx").get();

        SubAggCollectionMode aggCollectionMode = randomFrom(SubAggCollectionMode.values());

        assertResponse(
            prepareSearch("test-idx").setQuery(QueryBuilders.termQuery("even", true))
                .addAggregation(AggregationBuilders.terms("test").field("test_field").size(recordCount * 2).collectMode(aggCollectionMode))
                .addAggregation(
                    AggregationBuilders.terms("test_raw").field("test_field_raw").size(recordCount * 2).collectMode(aggCollectionMode)
                ),
            response -> {
                assertThat(response.getHits().getTotalHits().value(), equalTo((long) recordCount));

                assertThat(((Terms) response.getAggregations().get("test")).getBuckets().size(), equalTo(recordCount + 1));
                assertThat(((Terms) response.getAggregations().get("test_raw")).getBuckets().size(), equalTo(recordCount));
            }
        );
    }

    public void testDynamicObjectCopyTo() throws Exception {
        String mapping = Strings.toString(
            jsonBuilder().startObject()
                .startObject("properties")
                .startObject("foo")
                .field("type", "text")
                .field("copy_to", "root.top.child")
                .endObject()
                .endObject()
                .endObject()
        );
        assertAcked(indicesAdmin().prepareCreate("test-idx").setMapping(mapping));
        prepareIndex("test-idx").setId("1").setSource("foo", "bar").get();
        indicesAdmin().prepareRefresh("test-idx").get();
        assertHitCount(prepareSearch("test-idx").setQuery(QueryBuilders.termQuery("root.top.child", "bar")), 1L);
    }

    private XContentBuilder createDynamicTemplateMapping() throws IOException {
        return XContentFactory.jsonBuilder()
            .startObject()
            .startObject("_doc")
            .startArray("dynamic_templates")

            .startObject()
            .startObject("template_raw")
            .field("match", "*_raw")
            .field("match_mapping_type", "string")
            .startObject("mapping")
            .field("type", "keyword")
            .endObject()
            .endObject()
            .endObject()

            .startObject()
            .startObject("template_all")
            .field("match", "*")
            .field("match_mapping_type", "string")
            .startObject("mapping")
            .field("type", "text")
            .field("fielddata", true)
            .field("copy_to", "{name}_raw")
            .endObject()
            .endObject()
            .endObject()

            .endArray()
            .endObject()
            .endObject();
    }

}