/*
 * 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.builder.attributes;

import java.io.IOException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.Base64Utils;

import at.gv.egiz.eaaf.core.api.idp.IAttributeGenerator;
import at.gv.egiz.eaaf.core.api.idp.IAuthData;
import at.gv.egiz.eaaf.core.api.idp.IPvpAttributeBuilder;
import at.gv.egiz.eaaf.core.api.idp.ISpConfiguration;
import at.gv.egiz.eaaf.core.exceptions.AttributeBuilderException;
import at.gv.egiz.eaaf.core.exceptions.UnavailableAttributeException;

@Deprecated
@PvpMetadata
public class EidIdentityLinkBuilder implements IPvpAttributeBuilder {
  private static final Logger log = LoggerFactory.getLogger(EidIdentityLinkBuilder.class);

  @Override
  public String getName() {
    return EID_IDENTITY_LINK_NAME;
  }

  @Override
  public <ATT> ATT build(final ISpConfiguration oaParam, final IAuthData authData,
      final IAttributeGenerator<ATT> g) throws AttributeBuilderException {
    try {
      String ilAssertion = null;
      if (authData.getIdentityLink() == null) {
        throw new UnavailableAttributeException(EID_IDENTITY_LINK_NAME);
      }

      ilAssertion = authData.getIdentityLink().getSerializedSamlAssertion();

      return g.buildStringAttribute(EID_IDENTITY_LINK_FRIENDLY_NAME, EID_IDENTITY_LINK_NAME,
          Base64Utils.encodeToString(ilAssertion.getBytes("UTF-8")));

    } catch (final IOException e) {
      log.warn("IdentityLink serialization error.", e);
      return g.buildEmptyAttribute(EID_IDENTITY_LINK_FRIENDLY_NAME, EID_IDENTITY_LINK_NAME);
    }

  }

  @Override
  public <ATT> ATT buildEmpty(final IAttributeGenerator<ATT> g) {
    return g.buildEmptyAttribute(EID_IDENTITY_LINK_FRIENDLY_NAME, EID_IDENTITY_LINK_NAME);
  }

}