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/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

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.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.tasks.Task;
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.TransportSearchHelper.parseScrollId;

public class TransportSearchScrollAction extends HandledTransportAction {

    private final ClusterService clusterService;
    private final SearchTransportService searchTransportService;
    private final SearchPhaseController searchPhaseController;

    @Inject
    public TransportSearchScrollAction(
        TransportService transportService,
        ClusterService clusterService,
        ActionFilters actionFilters,
        SearchTransportService searchTransportService,
        SearchPhaseController searchPhaseController
    ) {
        super(SearchScrollAction.NAME, transportService, actionFilters, (Writeable.Reader) SearchScrollRequest::new);
        this.clusterService = clusterService;
        this.searchTransportService = searchTransportService;
        this.searchPhaseController = searchPhaseController;
    }

    @Override
    protected void doExecute(Task task, SearchScrollRequest request, ActionListener listener) {
        try {
            ParsedScrollId scrollId = parseScrollId(request.scrollId());
            Runnable action;
            switch (scrollId.getType()) {
                case QUERY_THEN_FETCH_TYPE:
                    action = new SearchScrollQueryThenFetchAsyncAction(
                        logger,
                        clusterService,
                        searchTransportService,
                        searchPhaseController,
                        request,
                        (SearchTask) task,
                        scrollId,
                        listener
                    );
                    break;
                case QUERY_AND_FETCH_TYPE: // TODO can we get rid of this?
                    action = new SearchScrollQueryAndFetchAsyncAction(
                        logger,
                        clusterService,
                        searchTransportService,
                        searchPhaseController,
                        request,
                        (SearchTask) task,
                        scrollId,
                        listener
                    );
                    break;
                default:
                    throw new IllegalArgumentException("Scroll id type [" + scrollId.getType() + "] unrecognized");
            }
            action.run();
        } catch (Exception e) {
            listener.onFailure(e);
        }
    }
}