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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.action.search;

import org.elasticsearch.action.ActionListener;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.util.concurrent.AtomicArray;
import org.elasticsearch.search.action.SearchServiceTransportAction;
import org.elasticsearch.search.controller.SearchPhaseController;
import org.elasticsearch.search.fetch.FetchSearchResultProvider;
import org.elasticsearch.search.internal.InternalSearchResponse;
import org.elasticsearch.search.internal.ShardSearchTransportRequest;
import org.elasticsearch.search.query.QuerySearchResultProvider;
import org.elasticsearch.threadpool.ThreadPool;

class SearchCountAsyncAction extends AbstractSearchAsyncAction<QuerySearchResultProvider> {

    SearchCountAsyncAction(ESLogger logger, SearchServiceTransportAction searchService, ClusterService clusterService,
                                        IndexNameExpressionResolver indexNameExpressionResolver,
                                        SearchPhaseController searchPhaseController, ThreadPool threadPool, SearchRequest request,
                                        ActionListener<SearchResponse> listener) {
        super(logger, searchService, clusterService, indexNameExpressionResolver, searchPhaseController, threadPool,
                request, listener);
    }

    @Override
    protected String firstPhaseName() {
        return "query";
    }

    @Override
    protected void sendExecuteFirstPhase(DiscoveryNode node, ShardSearchTransportRequest request, ActionListener<QuerySearchResultProvider> listener) {
        searchService.sendExecuteQuery(node, request, listener);
    }

    @Override
    protected void moveToSecondPhase() throws Exception {
        // no need to sort, since we know we have no hits back
        final InternalSearchResponse internalResponse = searchPhaseController.merge(SearchPhaseController.EMPTY_DOCS, firstResults,
                (AtomicArray<? extends FetchSearchResultProvider>) AtomicArray.empty(), request);
        String scrollId = null;
        if (request.scroll() != null) {
            scrollId = TransportSearchHelper.buildScrollId(request.searchType(), firstResults, null);
        }
        listener.onResponse(new SearchResponse(internalResponse, scrollId, expectedSuccessfulOps, successfulOps.get(), buildTookInMillis(), buildShardFailures()));
    }
}