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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.cluster;

import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.elasticsearch.common.Priority;
import org.elasticsearch.test.ESIntegTestCase;
import java.util.concurrent.atomic.AtomicBoolean;

import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.not;

public class ClusterHealthIT extends ESIntegTestCase {

    public void testSimpleLocalHealth() {
        createIndex("test");
        ensureGreen(); // master should thing it's green now.

        for (String node : internalCluster().getNodeNames()) {
            // a very high time out, which should never fire due to the local flag
            ClusterHealthResponse health = client(node).admin().cluster().prepareHealth().setLocal(true).setWaitForEvents(Priority.LANGUID).setTimeout("30s").get("10s");
            assertThat(health.getStatus(), equalTo(ClusterHealthStatus.GREEN));
            assertThat(health.isTimedOut(), equalTo(false));
        }
    }

    public void testHealth() {
        logger.info("--> running cluster health on an index that does not exists");
        ClusterHealthResponse healthResponse = client().admin().cluster().prepareHealth("test1").setWaitForYellowStatus().setTimeout("1s").execute().actionGet();
        assertThat(healthResponse.isTimedOut(), equalTo(true));
        assertThat(healthResponse.getStatus(), equalTo(ClusterHealthStatus.RED));
        assertThat(healthResponse.getIndices().isEmpty(), equalTo(true));

        logger.info("--> running cluster wide health");
        healthResponse = client().admin().cluster().prepareHealth().setWaitForGreenStatus().setTimeout("10s").execute().actionGet();
        assertThat(healthResponse.isTimedOut(), equalTo(false));
        assertThat(healthResponse.getStatus(), equalTo(ClusterHealthStatus.GREEN));
        assertThat(healthResponse.getIndices().isEmpty(), equalTo(true));

        logger.info("--> Creating index test1 with zero replicas");
        createIndex("test1");

        logger.info("--> running cluster health on an index that does exists");
        healthResponse = client().admin().cluster().prepareHealth("test1").setWaitForGreenStatus().setTimeout("10s").execute().actionGet();
        assertThat(healthResponse.isTimedOut(), equalTo(false));
        assertThat(healthResponse.getStatus(), equalTo(ClusterHealthStatus.GREEN));
        assertThat(healthResponse.getIndices().get("test1").getStatus(), equalTo(ClusterHealthStatus.GREEN));

        logger.info("--> running cluster health on an index that does exists and an index that doesn't exists");
        healthResponse = client().admin().cluster().prepareHealth("test1", "test2").setWaitForYellowStatus().setTimeout("1s").execute().actionGet();
        assertThat(healthResponse.isTimedOut(), equalTo(true));
        assertThat(healthResponse.getStatus(), equalTo(ClusterHealthStatus.RED));
        assertThat(healthResponse.getIndices().get("test1").getStatus(), equalTo(ClusterHealthStatus.GREEN));
        assertThat(healthResponse.getIndices().size(), equalTo(1));
    }

    public void testHealthOnIndexCreation() throws Exception {
        final AtomicBoolean finished = new AtomicBoolean(false);
        Thread clusterHealthThread = new Thread() {
            @Override
            public void run() {
                while (finished.get() == false) {
                    ClusterHealthResponse health = client().admin().cluster().prepareHealth().get();
                    assertThat(health.getStatus(), not(equalTo(ClusterHealthStatus.RED)));
                }
            }
        };
        clusterHealthThread.start();
        for (int i = 0; i < 10; i++) {
            createIndex("test" + i);
        }
        finished.set(true);
        clusterHealthThread.join();
    }

}
