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/*
 * Copyright (c) 2002-2024 "Neo4j,"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Licensed 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.neo4j.ogm.response.model;

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Optional;

import org.neo4j.ogm.model.Edge;
import org.neo4j.ogm.model.GraphModel;
import org.neo4j.ogm.model.Node;

/**
 * The results of a query, modelled as graph data.
 *
 * @author Michal Bachman
 * @author Michael J. Simons
 */
public class DefaultGraphModel implements GraphModel {

    private final Map nodes = new LinkedHashMap<>();
    private final Map relationships = new LinkedHashMap<>();

    public Collection getNodes() {
        return nodes.values();
    }

    public void addNode(NodeModel node) {
        this.nodes.put(node.getId(), node);
    }

    public void addRelationship(RelationshipModel edge) {
        this.relationships.put(edge.getId(), edge);
    }

    public void addNodes(NodeModel[] additionalNodes) {

        for (NodeModel node : additionalNodes) {
            this.nodes.put(node.getId(), node);
        }
    }

    public Collection getRelationships() {
        return relationships.values();
    }

    public void addRelationships(RelationshipModel[] additionalRelationships) {

        for (RelationshipModel relationship : additionalRelationships) {
            this.relationships.put(relationship.getId(), relationship);
        }
    }

    public Optional findNode(Long nodeId) {

        return Optional.ofNullable(nodes.get(nodeId));
    }
}