/*
 * 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", the "GNU Affero General Public License v3.0 only", 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", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.search.fetch;

import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.core.RefCounted;
import org.elasticsearch.core.SimpleRefCounted;
import org.elasticsearch.search.SearchPhaseResult;
import org.elasticsearch.search.SearchShardTarget;
import org.elasticsearch.search.internal.ShardSearchContextId;
import org.elasticsearch.search.query.QuerySearchResult;
import org.elasticsearch.transport.LeakTracker;

import java.io.IOException;

public final class QueryFetchSearchResult extends SearchPhaseResult {

    private final QuerySearchResult queryResult;
    private final FetchSearchResult fetchResult;
    private final RefCounted refCounted;

    public static QueryFetchSearchResult of(QuerySearchResult queryResult, FetchSearchResult fetchResult) {
        // We're acquiring a copy, we should incRef it
        queryResult.incRef();
        fetchResult.incRef();
        return new QueryFetchSearchResult(queryResult, fetchResult);
    }

    public QueryFetchSearchResult(StreamInput in) throws IOException {
        // These get a ref count of 1 when we create them, so we don't need to incRef here
        this(new QuerySearchResult(in), new FetchSearchResult(in));
    }

    private QueryFetchSearchResult(QuerySearchResult queryResult, FetchSearchResult fetchResult) {
        this.queryResult = queryResult;
        this.fetchResult = fetchResult;
        refCounted = LeakTracker.wrap(new SimpleRefCounted());
    }

    @Override
    public ShardSearchContextId getContextId() {
        return queryResult.getContextId();
    }

    @Override
    public SearchShardTarget getSearchShardTarget() {
        return queryResult.getSearchShardTarget();
    }

    @Override
    public void setSearchShardTarget(SearchShardTarget shardTarget) {
        super.setSearchShardTarget(shardTarget);
        queryResult.setSearchShardTarget(shardTarget);
        fetchResult.setSearchShardTarget(shardTarget);
    }

    @Override
    public void setShardIndex(int requestIndex) {
        super.setShardIndex(requestIndex);
        queryResult.setShardIndex(requestIndex);
        fetchResult.setShardIndex(requestIndex);
    }

    @Override
    public QuerySearchResult queryResult() {
        return queryResult;
    }

    @Override
    public FetchSearchResult fetchResult() {
        return fetchResult;
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        queryResult.writeTo(out);
        fetchResult.writeTo(out);
    }

    @Override
    public void incRef() {
        refCounted.incRef();
    }

    @Override
    public boolean tryIncRef() {
        return refCounted.tryIncRef();
    }

    @Override
    public boolean decRef() {
        if (refCounted.decRef()) {
            deallocate();
            return true;
        }
        return false;
    }

    private void deallocate() {
        queryResult.decRef();
        fetchResult.decRef();
    }

    @Override
    public boolean hasReferences() {
        return refCounted.hasReferences();
    }
}