/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.server.http.cypher.consumer;

import java.io.IOException;
import java.util.function.Consumer;
import org.neo4j.bolt.protocol.common.fsm.response.RecordHandler;
import org.neo4j.graphdb.Node;
import org.neo4j.server.http.cypher.CachingWriter;
import org.neo4j.values.AnyValue;
import org.neo4j.values.virtual.NodeValue;

public class SingleNodeRecordHandler implements RecordHandler {
    private final CachingWriter cachingWriter;
    private final Consumer<Node> nodeConsumer;

    public SingleNodeRecordHandler(CachingWriter cachingWriter, Consumer<Node> nodeConsumer) {
        this.cachingWriter = cachingWriter;
        this.nodeConsumer = nodeConsumer;
    }

    @Override
    public void onField(AnyValue value) {
        if (value instanceof NodeValue node) {
            try {
                node.writeTo(cachingWriter);
            } catch (IOException ex) {
                // TODO
                throw new RuntimeException(ex);
            }
        }
    }

    @Override
    public void onCompleted() {
        nodeConsumer.accept((Node) cachingWriter.getCachedObject());
    }

    @Override
    public void onFailure() {}
}
