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 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    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
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package org.elasticsearch.action.support;

import org.elasticsearch.action.UnavailableShardsException;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.test.ESIntegTestCase;

import static org.elasticsearch.common.unit.TimeValue.timeValueMillis;
import static org.elasticsearch.common.unit.TimeValue.timeValueSeconds;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.startsWith;

/**
 * Tests setting the active shard count for replication operations (e.g. index) operates correctly.
 */
public class WaitActiveShardCountIT extends ESIntegTestCase {
    public void testReplicationWaitsForActiveShardCount() throws Exception {
        CreateIndexResponse createIndexResponse =
            prepareCreate("test", 1, Settings.builder().put("index.number_of_shards", 1).put("index.number_of_replicas", 2)).get();

        assertAcked(createIndexResponse);

        // indexing, by default, will work (waiting for one shard copy only)
        client().prepareIndex("test", "type1", "1").setSource(source("1", "test"), XContentType.JSON).execute().actionGet();
        try {
            client().prepareIndex("test", "type1", "1").setSource(source("1", "test"), XContentType.JSON)
                    .setWaitForActiveShards(2) // wait for 2 active shard copies
                    .setTimeout(timeValueMillis(100)).execute().actionGet();
            fail("can't index, does not enough active shard copies");
        } catch (UnavailableShardsException e) {
            assertThat(e.status(), equalTo(RestStatus.SERVICE_UNAVAILABLE));
            assertThat(e.getMessage(), startsWith("[test][0] Not enough active copies to meet shard count of [2] (have 1, needed 2). Timeout: [100ms], request:"));
            // but really, all is well
        }

        allowNodes("test", 2);

        ClusterHealthResponse clusterHealth =
            client().admin().cluster().prepareHealth()
                .setWaitForEvents(Priority.LANGUID)
                .setWaitForActiveShards(2)
                .setWaitForYellowStatus()
                .execute()
                .actionGet();
        logger.info("Done Cluster Health, status {}", clusterHealth.getStatus());
        assertThat(clusterHealth.isTimedOut(), equalTo(false));
        assertThat(clusterHealth.getStatus(), equalTo(ClusterHealthStatus.YELLOW));

        // this should work, since we now have two
        client().prepareIndex("test", "type1", "1").setSource(source("1", "test"), XContentType.JSON)
                .setWaitForActiveShards(2)
                .setTimeout(timeValueSeconds(1)).execute().actionGet();

        try {
            client().prepareIndex("test", "type1", "1").setSource(source("1", "test"), XContentType.JSON)
                    .setWaitForActiveShards(ActiveShardCount.ALL)
                    .setTimeout(timeValueMillis(100)).execute().actionGet();
            fail("can't index, not enough active shard copies");
        } catch (UnavailableShardsException e) {
            assertThat(e.status(), equalTo(RestStatus.SERVICE_UNAVAILABLE));
            assertThat(e.getMessage(), startsWith("[test][0] Not enough active copies to meet shard count of [" + ActiveShardCount.ALL + "] (have 2, needed 3). Timeout: [100ms], request:"));
            // but really, all is well
        }

        allowNodes("test", 3);
        clusterHealth = client().admin().cluster().prepareHealth().setWaitForEvents(Priority.LANGUID).setWaitForActiveShards(3).setWaitForGreenStatus().execute().actionGet();
        logger.info("Done Cluster Health, status {}", clusterHealth.getStatus());
        assertThat(clusterHealth.isTimedOut(), equalTo(false));
        assertThat(clusterHealth.getStatus(), equalTo(ClusterHealthStatus.GREEN));

        // this should work, since we now have all shards started
        client().prepareIndex("test", "type1", "1").setSource(source("1", "test"), XContentType.JSON)
                .setWaitForActiveShards(ActiveShardCount.ALL)
                .setTimeout(timeValueSeconds(1)).execute().actionGet();
    }

    private String source(String id, String nameValue) {
        return "{ \"type1\" : { \"id\" : \"" + id + "\", \"name\" : \"" + nameValue + "\" } }";
    }
}