/*
 * The MIT License
 * Copyright © 2014-2019 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.iluwatar.saga.choreography;

import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Optional;

/**
 * The class representing a service discovery pattern.
 */
public class ServiceDiscoveryService {
  private Map<String, ChoreographyChapter> services;

  /**
   * find any service.
   *
   * @return any service
   * @throws NoSuchElementException if no elements further
   */
  public ChoreographyChapter findAny() {
    return services.values().iterator().next();
  }

  public Optional<ChoreographyChapter> find(String service) {
    return Optional.ofNullable(services.getOrDefault(service, null));
  }

  public ServiceDiscoveryService discover(ChoreographyChapter chapterService) {
    services.put(chapterService.getName(), chapterService);
    return this;
  }

  public ServiceDiscoveryService() {
    this.services = new HashMap<>();
  }


}
