/*
 * Copyright 2018 the original author or authors.
 *
 *  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.openehealth.ipf.commons.ihe.fhir.support.translation;

import org.hl7.fhir.r4.model.NamingSystem;
import org.openehealth.ipf.commons.ihe.fhir.support.NamingSystemService;
import org.openehealth.ipf.commons.ihe.fhir.translation.AbstractUriMapper;

import java.util.Optional;

import static org.hl7.fhir.r4.model.NamingSystem.NamingSystemIdentifierType.*;


/**
 * URI Mapper that is backed by a {@link NamingSystemService}. The mapping is done
 * by search for a {@link NamingSystem}
 * with a uniqueID of a certain type and returning a unique ID with a different type.
 *
 * @author Christian Ohr
 * @since 3.6
 */
public class NamingSystemUriMapper extends AbstractUriMapper {

    private final NamingSystemService namingSystemService;
    private final String mappingId;

    public NamingSystemUriMapper(NamingSystemService namingSystemService, String mappingId) {
        this.namingSystemService = namingSystemService;
        this.mappingId = mappingId;
    }

    @Override
    protected Optional<String> mapOidToUri(String oid) {
        return namingSystemService.findActiveNamingSystemByTypeAndValue(mappingId, OID, oid)
                .map(NamingSystemService.getValueOfType(URI));
    }

    @Override
    protected Optional<String> mapUriToOid(String uri) {
        return namingSystemService.findActiveNamingSystemByTypeAndValue(mappingId, URI, uri)
                .map(NamingSystemService.getValueOfType(OID));
    }

    @Override
    protected Optional<String> mapUriToNamespace(String uri) {
        return namingSystemService.findActiveNamingSystemByTypeAndValue(mappingId, URI, uri)
                .map(NamingSystemService.getValueOfType(OTHER));
    }

    @Override
    protected Optional<String> mapNamespaceToUri(String namespace) {
        return namingSystemService.findActiveNamingSystemByTypeAndValue(mappingId, OTHER, namespace)
                .map(NamingSystemService.getValueOfType(URI));
    }
}
