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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
 * under the License.
 */

package org.elasticsearch.action.search;

import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.HandledTransportAction;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.search.action.SearchServiceTransportAction;
import org.elasticsearch.search.controller.SearchPhaseController;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;

import static org.elasticsearch.action.search.ParsedScrollId.QUERY_AND_FETCH_TYPE;
import static org.elasticsearch.action.search.ParsedScrollId.QUERY_THEN_FETCH_TYPE;
import static org.elasticsearch.action.search.ParsedScrollId.SCAN;
import static org.elasticsearch.action.search.TransportSearchHelper.parseScrollId;

/**
 *
 */
public class TransportSearchScrollAction extends HandledTransportAction {

    private final ClusterService clusterService;
    private final SearchServiceTransportAction searchService;
    private final SearchPhaseController searchPhaseController;

    @Inject
    public TransportSearchScrollAction(Settings settings, ThreadPool threadPool, TransportService transportService,
                                       ClusterService clusterService, SearchServiceTransportAction searchService,
                                       SearchPhaseController searchPhaseController,
                                       ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
        super(settings, SearchScrollAction.NAME, threadPool, transportService, actionFilters, indexNameExpressionResolver,
                SearchScrollRequest.class);
        this.clusterService = clusterService;
        this.searchService = searchService;
        this.searchPhaseController = searchPhaseController;
    }

    @Override
    protected void doExecute(SearchScrollRequest request, ActionListener listener) {
        try {
            ParsedScrollId scrollId = parseScrollId(request.scrollId());
            AbstractAsyncAction action;
            switch (scrollId.getType()) {
                case QUERY_THEN_FETCH_TYPE:
                    action = new SearchScrollQueryThenFetchAsyncAction(logger, clusterService, searchService,
                            searchPhaseController, request, scrollId, listener);
                    break;
                case QUERY_AND_FETCH_TYPE:
                    action = new SearchScrollQueryAndFetchAsyncAction(logger, clusterService, searchService,
                            searchPhaseController, request, scrollId, listener);
                    break;
                case SCAN:
                    action = new SearchScrollScanAsyncAction(logger, clusterService, searchService, searchPhaseController,
                            request, scrollId, listener);
                    break;
                default:
                    throw new IllegalArgumentException("Scroll id type [" + scrollId.getType() + "] unrecognized");
            }
            action.start();
        } catch (Throwable e) {
            listener.onFailure(e);
        }
    }
}