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 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * 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.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.ShardRoutingState;
import org.elasticsearch.cluster.routing.TestShardRouting;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.test.ESTestCase;

public class ClusterInfoTests extends ESTestCase {

    public void testSerialization() throws Exception {
        ClusterInfo clusterInfo = new ClusterInfo(
                randomDiskUsage(), randomDiskUsage(), randomShardSizes(), randomRoutingToDataPath()
        );
        BytesStreamOutput output = new BytesStreamOutput();
        clusterInfo.writeTo(output);

        ClusterInfo result = new ClusterInfo(output.bytes().streamInput());
        assertEquals(clusterInfo.getNodeLeastAvailableDiskUsages(), result.getNodeLeastAvailableDiskUsages());
        assertEquals(clusterInfo.getNodeMostAvailableDiskUsages(), result.getNodeMostAvailableDiskUsages());
        assertEquals(clusterInfo.shardSizes, result.shardSizes);
        assertEquals(clusterInfo.routingToDataPath, result.routingToDataPath);
    }

    private static ImmutableOpenMap<String, DiskUsage> randomDiskUsage() {
        int numEntries = randomIntBetween(0, 128);
        ImmutableOpenMap.Builder<String, DiskUsage> builder = ImmutableOpenMap.builder(numEntries);
        for (int i = 0; i < numEntries; i++) {
            String key = randomAlphaOfLength(32);
            DiskUsage diskUsage = new DiskUsage(
                    randomAlphaOfLength(4), randomAlphaOfLength(4), randomAlphaOfLength(4),
                    randomIntBetween(0, Integer.MAX_VALUE), randomIntBetween(0, Integer.MAX_VALUE)
            );
            builder.put(key, diskUsage);
        }
        return builder.build();
    }

    private static ImmutableOpenMap<String, Long> randomShardSizes() {
        int numEntries = randomIntBetween(0, 128);
        ImmutableOpenMap.Builder<String, Long> builder = ImmutableOpenMap.builder(numEntries);
        for (int i = 0; i < numEntries; i++) {
            String key = randomAlphaOfLength(32);
            long shardSize = randomIntBetween(0, Integer.MAX_VALUE);
            builder.put(key, shardSize);
        }
        return builder.build();
    }

    private static ImmutableOpenMap<ShardRouting, String> randomRoutingToDataPath() {
        int numEntries = randomIntBetween(0, 128);
        ImmutableOpenMap.Builder<ShardRouting, String> builder = ImmutableOpenMap.builder(numEntries);
        for (int i = 0; i < numEntries; i++) {
            ShardId shardId = new ShardId(randomAlphaOfLength(32), randomAlphaOfLength(32), randomIntBetween(0, Integer.MAX_VALUE));
            ShardRouting shardRouting = TestShardRouting.newShardRouting(shardId, null, randomBoolean(), ShardRoutingState.UNASSIGNED);
            builder.put(shardRouting, randomAlphaOfLength(32));
        }
        return builder.build();
    }

}