/*
 * Licensed to DuraSpace under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership.
 *
 * DuraSpace licenses this file to you 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.fcrepo.kernel.modeshape.rdf.impl;

import static org.fcrepo.kernel.api.FedoraTypes.FEDORA_LASTMODIFIED;
import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.JCR_LASTMODIFIED;
import static org.fcrepo.kernel.modeshape.FedoraResourceImpl.fixDatesIfNecessary;
import static org.fcrepo.kernel.modeshape.identifiers.NodeResourceConverter.nodeToResource;
import static org.fcrepo.kernel.modeshape.utils.FedoraTypesUtils.getJcrNode;
import static org.fcrepo.kernel.modeshape.utils.FedoraTypesUtils.isInternalProperty;
import static org.fcrepo.kernel.modeshape.utils.StreamUtils.iteratorToStream;
import static org.fcrepo.kernel.modeshape.utils.UncheckedPredicate.uncheck;
import static org.slf4j.LoggerFactory.getLogger;

import java.util.stream.Stream;

import javax.jcr.Node;
import javax.jcr.RepositoryException;

import com.google.common.base.Converter;
import org.fcrepo.kernel.api.identifiers.IdentifierConverter;
import org.fcrepo.kernel.api.models.FedoraResource;
import org.fcrepo.kernel.modeshape.rdf.impl.mappings.PropertyToTriple;

import org.slf4j.Logger;

import org.apache.jena.graph.Triple;
import org.apache.jena.rdf.model.Resource;

/**
 * {@link NodeRdfContext} for RDF that derives from JCR properties on a Resource
 *
 * @author ajs6f
 * @since Oct 10, 2013
 */
public class PropertiesRdfContext extends NodeRdfContext {

    private static final Logger LOGGER = getLogger(PropertiesRdfContext.class);

    /**
     * Default constructor.
     *
     * @param resource the resource
     * @param idTranslator the id translator
     * @throws RepositoryException if repository exception occurred
     */

    public PropertiesRdfContext(final FedoraResource resource,
                                final IdentifierConverter<Resource, FedoraResource> idTranslator)
        throws RepositoryException {
        super(resource, idTranslator);
        concat(triplesFromProperties(resource, nodeToResource(translator()),
                new PropertyToTriple(getJcrNode(resource).getSession(), translator())));
    }

    @SuppressWarnings("unchecked")
    private static Stream<Triple> triplesFromProperties(final FedoraResource n,
                                                        final Converter<Node, Resource> translator,
                                                        final PropertyToTriple propertyToTriple)
            throws RepositoryException {
        LOGGER.trace("Creating triples for node: {}", n);
        return iteratorToStream(getJcrNode(n).getProperties())
            .filter(isInternalProperty.negate().or(uncheck(prop ->
                prop.getName().equals(JCR_LASTMODIFIED) && !n.hasProperty(FEDORA_LASTMODIFIED))))
            .flatMap(propertyToTriple).map(fixDatesIfNecessary(n, translator));
    }

}