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/*
 * 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
 *
 *   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 ai.grakn.client.concept;

import ai.grakn.client.Grakn;
import ai.grakn.concept.Concept;
import ai.grakn.concept.ConceptId;
import ai.grakn.concept.RelationshipType;
import ai.grakn.concept.Role;
import ai.grakn.concept.Type;
import ai.grakn.rpc.proto.ConceptProto;
import com.google.auto.value.AutoValue;

import java.util.stream.Stream;

/**
 * Client implementation of {@link ai.grakn.concept.Role}
 */
@AutoValue
public abstract class RemoteRole extends RemoteSchemaConcept implements Role {

    static RemoteRole construct(Grakn.Transaction tx, ConceptId id) {
        return new AutoValue_RemoteRole(tx, id);
    }

    @Override
    public final Stream relationships() {
        ConceptProto.Method.Req method = ConceptProto.Method.Req.newBuilder()
                .setRoleRelationsReq(ConceptProto.Role.Relations.Req.getDefaultInstance()).build();
        int iteratorId = runMethod(method).getRoleRelationsIter().getId();
        return conceptStream(iteratorId, res -> res.getRoleRelationsIterRes().getRelationType()).map(Concept::asRelationshipType);
    }

    @Override
    public final Stream players() {
        ConceptProto.Method.Req method = ConceptProto.Method.Req.newBuilder()
                .setRolePlayersReq(ConceptProto.Role.Players.Req.getDefaultInstance()).build();
        int iteratorId = runMethod(method).getRolePlayersIter().getId();
        return conceptStream(iteratorId, res -> res.getRolePlayersIterRes().getType()).map(Concept::asType);
    }

    @Override
    final Role asCurrentBaseType(Concept other) {
        return other.asRole();
    }

    @Override
    final boolean equalsCurrentBaseType(Concept other) {
        return other.isRole();
    }
}