/*
 * 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.rest.domain;

import static org.neo4j.kernel.api.KernelTransaction.Type.IMPLICIT;

import java.util.Map;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Label;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.graphdb.Transaction;
import org.neo4j.kernel.api.security.AnonymousContext;
import org.neo4j.kernel.internal.GraphDatabaseAPI;

public class GraphDbHelper {
    private final GraphDatabaseAPI databaseService;

    public GraphDbHelper(GraphDatabaseService databaseService) {
        this.databaseService = (GraphDatabaseAPI) databaseService;
    }

    public long createNode(Label... labels) {
        try (Transaction tx = databaseService.beginTransaction(IMPLICIT, AnonymousContext.writeToken())) {
            Node node = tx.createNode(labels);
            tx.commit();
            return node.getId();
        }
    }

    public long createNode(Map<String, Object> properties, Label... labels) {
        try (Transaction tx = databaseService.beginTransaction(IMPLICIT, AnonymousContext.writeToken())) {
            Node node = tx.createNode(labels);
            for (Map.Entry<String, Object> entry : properties.entrySet()) {
                node.setProperty(entry.getKey(), entry.getValue());
            }
            tx.commit();
            return node.getId();
        }
    }

    public long createRelationship(String type, long startNodeId, long endNodeId) {
        try (Transaction tx = databaseService.beginTransaction(IMPLICIT, AnonymousContext.writeToken())) {
            Node startNode = tx.getNodeById(startNodeId);
            Node endNode = tx.getNodeById(endNodeId);
            Relationship relationship = startNode.createRelationshipTo(endNode, RelationshipType.withName(type));
            tx.commit();
            return relationship.getId();
        }
    }
}
