/*
 * 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 org.apache.streampipes.messaging;

import org.apache.streampipes.model.grounding.TransportProtocol;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

public enum SpProtocolManager {

  INSTANCE;

  private final List<SpProtocolDefinitionFactory<? extends TransportProtocol>> availableProtocols;

  SpProtocolManager() {
    this.availableProtocols = new ArrayList<>();
  }

  public void register(SpProtocolDefinitionFactory<? extends TransportProtocol> protocolDefinition) {
    availableProtocols.add(protocolDefinition);
  }

  public List<SpProtocolDefinitionFactory<? extends TransportProtocol>> getAvailableProtocols() {
    return availableProtocols;
  }

  public <T extends TransportProtocol> Optional<SpProtocolDefinition<T>> findDefinition(T transportProtocol) {
    // TODO add RDF URI for protocol in model
    return this.availableProtocols
        .stream()
        .filter
            (adf -> adf.getTransportProtocolClass().equals(transportProtocol.getClass()
                .getCanonicalName()))
        .map(s -> (SpProtocolDefinitionFactory<T>) s)
        .map(SpProtocolDefinitionFactory::createInstance)
        .findFirst();

  }
}
