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/*
 * Copyright © 2020 Cask Data, Inc.
 *
 * 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 io.cdap.cdap.internal.capability;

import io.cdap.cdap.api.app.ApplicationSpecification;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * CapabilityReader interface with methods based on current capability status
 */
public interface CapabilityReader {

  /**
   * Throws {@link CapabilityNotAvailableException} if all capabilities are not enabled
   */
  void checkAllEnabled(Collection capabilities)
      throws IOException, CapabilityNotAvailableException;

  /**
   * Get the configuration map for the capabilities if present
   */
  Map getConfigs(Collection capabilities) throws IOException;

  /**
   * Throws {@link CapabilityNotAvailableException} if all capabilities in the spec are not enabled
   */
  default void checkAllEnabled(ApplicationSpecification appSpec)
      throws IOException, CapabilityNotAvailableException {
    Set capabilities = appSpec.getPlugins().entrySet().stream()
        .flatMap(pluginEntry -> pluginEntry.getValue().getPluginClass().getRequirements()
            .getCapabilities().stream())
        .collect(Collectors.toSet());
    checkAllEnabled(capabilities);
  }
}