/*
 * Copyright 2017 Graz University of Technology EAAF-Core Components has been developed in a
 * cooperation between EGIZ, A-SIT Plus, A-SIT, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.2 or - as soon they will be approved by the European
 * Commission - subsequent versions of the EUPL (the "Licence"); You may not use this work except in
 * compliance with the Licence. You may obtain a copy of the Licence at:
 * https://joinup.ec.europa.eu/news/understanding-eupl-v12
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the Licence
 * is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the Licence for the specific language governing permissions and limitations under
 * the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text file for details on the
 * various modules and licenses. The "NOTICE" text file is part of the distribution. Any derivative
 * works that you distribute must include a readable copy of the "NOTICE" text file.
*/

package at.gv.egiz.eaaf.core.impl.idp.process.spring.test.task;

import java.io.IOException;
import java.io.InputStream;
import java.util.Objects;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import at.gv.egiz.eaaf.core.api.IRequest;
import at.gv.egiz.eaaf.core.api.idp.process.ExecutionContext;
import at.gv.egiz.eaaf.core.api.idp.process.Task;
import at.gv.egiz.eaaf.core.exceptions.TaskExecutionException;

/**
 * A dummy task simulating the signature of an auth block.
 * <p/>
 * Asynchonous
 * <p>
 * Requires context data:
 * <ul>
 * <li>{@code IdentityLink}</li>
 * <li>{@code isIdentityLinkValidated}</li>
 * <li>{@code bkuURL}</li>
 * </ul>
 * </p>
 * <p>
 * Enriches context data with:
 * <ul>
 * <li>{@code SignedAuthBlock}</li>
 * </ul>
 * </p>
 *
 * @author tknall
 *
 */
@Service("SignAuthBlockTask")
public class SignAuthBlockTask implements Task {

  private final Logger log = LoggerFactory.getLogger(getClass());

  @Override
  public IRequest execute(final IRequest penReq, final ExecutionContext executionContext)
      throws TaskExecutionException {
    Objects.requireNonNull(executionContext.get("IdentityLink"));
    assert Boolean.TRUE
        .equals(Objects.requireNonNull(executionContext.get("isIdentityLinkValidated")));
    Objects.requireNonNull(executionContext.get("bkuURL"));

    log.debug("Using validated IdentityLink and bkuURL in order to sign auth block.");
    try (InputStream in =
        getClass().getResourceAsStream("/process/spring/test/task/SignedAuthBlock.xml")) {
      executionContext.put("SignedAuthBlock", IOUtils.toString(in, "UTF-8"));
    } catch (final IOException e) {
      throw new TaskExecutionException(null, "", e);

    }
    return null;
  }

}