/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.streams.example.test;

import org.apache.streams.config.ComponentConfigurator;
import org.apache.streams.elasticsearch.ElasticsearchClientManager;
import org.apache.streams.elasticsearch.test.ElasticsearchParentChildWriterIT;
import org.apache.streams.example.ElasticsearchReindex;
import org.apache.streams.example.ElasticsearchReindexConfiguration;
import org.apache.streams.jackson.StreamsJacksonMapper;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.typesafe.config.Config;
import com.typesafe.config.ConfigFactory;
import com.typesafe.config.ConfigParseOptions;

import org.elasticsearch.action.admin.cluster.health.ClusterHealthRequest;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.action.admin.indices.exists.indices.IndicesExistsRequest;
import org.elasticsearch.action.admin.indices.exists.indices.IndicesExistsResponse;
import org.elasticsearch.action.admin.indices.template.put.PutIndexTemplateRequestBuilder;
import org.elasticsearch.action.search.SearchRequestBuilder;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.client.Requests;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

import java.io.File;
import java.net.URL;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.core.Is.is;
import static org.hamcrest.core.IsNot.not;
import static org.testng.Assert.assertTrue;

/**
 * Test copying parent/child associated documents between two indexes on same cluster
 */
public class ElasticsearchReindexParentIT {

    private final static Logger LOGGER = LoggerFactory.getLogger(ElasticsearchReindexIT.class);

    ObjectMapper MAPPER = StreamsJacksonMapper.getInstance();

    protected ElasticsearchReindexConfiguration testConfiguration;
    protected Client testClient;

    private int count = 0;

    @BeforeClass
    public void prepareTest() throws Exception {

        Config reference  = ConfigFactory.load();
        File conf_file = new File("target/test-classes/ElasticsearchReindexParentIT.conf");
        assert(conf_file.exists());
        Config testResourceConfig  = ConfigFactory.parseFileAnySyntax(conf_file, ConfigParseOptions.defaults().setAllowMissing(false));
        Config typesafe  = testResourceConfig.withFallback(reference).resolve();
        testConfiguration = new ComponentConfigurator<>(ElasticsearchReindexConfiguration.class).detectConfiguration(typesafe);
        testClient = ElasticsearchClientManager.getInstance(testConfiguration.getSource()).client();

        ClusterHealthRequest clusterHealthRequest = Requests.clusterHealthRequest();
        ClusterHealthResponse clusterHealthResponse = testClient.admin().cluster().health(clusterHealthRequest).actionGet();
        assertThat(clusterHealthResponse.getStatus(), not(ClusterHealthStatus.RED));

        IndicesExistsRequest indicesExistsRequest = Requests.indicesExistsRequest(testConfiguration.getSource().getIndexes().get(0));
        IndicesExistsResponse indicesExistsResponse = testClient.admin().indices().exists(indicesExistsRequest).actionGet();
        assertTrue(indicesExistsResponse.isExists());

        SearchRequestBuilder countRequest = testClient
                .prepareSearch(testConfiguration.getSource().getIndexes().get(0))
                .setTypes(testConfiguration.getSource().getTypes().get(0));
        SearchResponse countResponse = countRequest.execute().actionGet();

        count = (int)countResponse.getHits().getTotalHits();

        PutIndexTemplateRequestBuilder putTemplateRequestBuilder = testClient.admin().indices().preparePutTemplate("mappings");
        URL templateURL = ElasticsearchParentChildWriterIT.class.getResource("/ActivityChildObjectParent.json");
        ObjectNode template = MAPPER.readValue(templateURL, ObjectNode.class);
        String templateSource = MAPPER.writeValueAsString(template);
        putTemplateRequestBuilder.setSource(templateSource);

        testClient.admin().indices().putTemplate(putTemplateRequestBuilder.request()).actionGet();

        assertThat(count, not(0));

    }

    @Test
    public void testReindex() throws Exception {

        ElasticsearchReindex reindex = new ElasticsearchReindex(testConfiguration);

        reindex.run();

        // assert lines in file
        SearchRequestBuilder countRequest = testClient
                .prepareSearch(testConfiguration.getDestination().getIndex())
                .setTypes(testConfiguration.getDestination().getType());
        SearchResponse countResponse = countRequest.execute().actionGet();

        assertThat((int)countResponse.getHits().getTotalHits(), is(count));

    }

}