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/*
 *  Copyright (c) 2022 Contributors to the Eclipse Foundation
 *   All rights reserved. This program and the accompanying materials
 *   are made available under the terms of the Eclipse Public License v1.0
 *   and Apache License v2.0 which accompanies this distribution.
 *   The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 *   and the Apache License v2.0 is available at http://www.opensource.org/licenses/apache2.0.php.
 *
 *   You may elect to redistribute this code under either of these licenses.
 *
 *   Contributors:
 *
 *   Otavio Santana
 */
package org.eclipse.jnosql.mapping.graph;

import org.eclipse.jnosql.mapping.core.Converters;
import org.eclipse.jnosql.mapping.metadata.EntitiesMetadata;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Transaction;
import org.apache.tinkerpop.gremlin.structure.Vertex;

import jakarta.enterprise.inject.Instance;
import jakarta.inject.Inject;

import java.util.Iterator;

/**
 * The default {@link GraphTemplate} to GraphTraversalSourceOperation
 */
@GraphTraversalSourceOperation
class DefaultGraphTraversalSourceTemplate extends AbstractGraphTemplate {

    private Instance supplierInstance;

    private EntitiesMetadata entities;

    private GraphConverter converter;

    private GraphEventPersistManager persistManager;

    private Converters converters;

    @Inject
    DefaultGraphTraversalSourceTemplate(Instance supplierInstance,
                                        EntitiesMetadata entities,
                                        @GraphTraversalSourceOperation GraphConverter converter,
                                        GraphEventPersistManager persistManager,
                                        Converters converters) {
        this.supplierInstance = supplierInstance;
        this.entities = entities;
        this.converter = converter;
        this.persistManager = persistManager;
        this.converters = converters;
    }

    DefaultGraphTraversalSourceTemplate(){
    }

    @Override
    protected Graph getGraph() {
        throw new UnsupportedOperationException("The GraphTraversalSourceOperation implementation does not support Graph");
    }

    @Override
    public Transaction transaction() {
        return traversal().tx();
    }

    @Override
    protected GraphTraversalSource traversal() {
        return supplierInstance.get().get();
    }

    @Override
    protected EntitiesMetadata getEntities() {
        return entities;
    }

    @Override
    protected GraphConverter getConverter() {
        return converter;
    }

    @Override
    protected GraphEventPersistManager getEventManager() {
        return persistManager;
    }

    @Override
    protected Converters getConverters() {
        return converters;
    }

    @Override
    protected Iterator vertices(Object id) {
        return traversal().V(id).toList().iterator();
    }

}