/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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
 *
 *   https://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.
 *
 *   SPDX-License-Identifier: Apache-2.0
 */

package org.apache.jena.ontapi.assemblers;

import org.apache.jena.assembler.Assembler;
import org.apache.jena.assembler.Mode;
import org.apache.jena.assembler.assemblers.AssemblerBase;
import org.apache.jena.ontapi.impl.repositories.DocumentGraphRepository;
import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.RDFNode;
import org.apache.jena.rdf.model.Resource;

public class DocumentGraphRepositoryAssembler extends AssemblerBase {

    /**
     * example:
     * <pre>{@code
     * PREFIX : <http://ex.com#>
     * PREFIX oa: <https://jena.apache.org/ontapi/Assembler#>
     * PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
     * PREFIX ja: <http://jena.hpl.hp.com/2005/11/Assembler#>
     * PREFIX lm: <http://jena.hpl.hp.com/2004/08/location-mapping#>
     *
     * :repo a oa:DocumentGraphRepository ;
     *      oa:graph :g1, :g2 ;
     *      oa:locationMappings :mappingModel .
     *
     * :mappingModel a ja:DefaultModel ;
     *      ja:externalContent <file:ontologies/location-mapping.ttl> .
     *
     * :g1 a oa:Graph ;
     *      oa:graphIRI "vocab1" ;
     *      oa:graphLocation "file:ontologies/vocab1.ttl" .
     *
     * :g2 a oa:Graph ;
     *      oa:graphIRI "vocab2" ;
     *      oa:graphLocation "file:ontologies/vocab2.ttl" .
     * }</pre>
     */
    @Override
    public Object open(Assembler a, Resource root, Mode mode) {
        checkType(root, OA.DocumentGraphRepository);
        DocumentGraphRepository repo = new DocumentGraphRepository();

        Model model = root.getModel();

        model.listStatements(root, OA.graph, (RDFNode) null)
                .mapWith(stmt -> stmt.getObject().asResource())
                .forEach(graph -> {
                    String id = graph.getProperty(OA.graphIRI).getString();
                    String location = graph.getProperty(OA.graphLocation).getString();
                    repo.addMapping(id, location);
                });

        model.listStatements(root, OA.locationMappings, (RDFNode) null)
                .mapWith(stmt -> stmt.getObject().asResource())
                .forEach(mappings -> repo.addMappings(a.openModel(mappings, mode)));

        return repo;
    }
}
