/*
    * This file is part of ***  M y C o R e  ***
    * See http://www.mycore.de/ for details.
    *
    * MyCoRe is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
   * MyCoRe is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with MyCoRe.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package org.mycore.sword.manager;
  
  import java.util.AbstractMap;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.mycore.frontend.MCRFrontendUtil;
  import org.mycore.sword.MCRSword;
  import org.mycore.sword.MCRSwordConstants;
  import org.mycore.sword.application.MCRSwordCollectionProvider;
  import org.swordapp.server.AuthCredentials;
  import org.swordapp.server.ServiceDocument;
  import org.swordapp.server.ServiceDocumentManager;
  import org.swordapp.server.SwordAuthException;
  import org.swordapp.server.SwordCollection;
  import org.swordapp.server.SwordConfiguration;
  import org.swordapp.server.SwordError;
  import org.swordapp.server.SwordServerException;
  import org.swordapp.server.SwordWorkspace;
  
  /**
   * @author Sebastian Hofmann (mcrshofm)
   */
  public class MCRSwordServiceDocumentManager implements ServiceDocumentManager {
  
      @Override
      public ServiceDocument getServiceDocument(String sdUri, AuthCredentials auth, SwordConfiguration config)
          throws SwordError, SwordServerException, SwordAuthException {
          ServiceDocument serviceDocument = new ServiceDocument();
  
          MCRSword.getWorkspaces().forEach(workspaceName -> {
              SwordWorkspace workspace = buildSwordWorkspace(workspaceName, auth);
              serviceDocument.addWorkspace(workspace);
          });
  
          return serviceDocument;
      }
  
      private SwordWorkspace buildSwordWorkspace(String workspaceName, AuthCredentials auth) {
          SwordWorkspace workspace = new SwordWorkspace();
          workspace.setTitle(workspaceName);
  
          buildSwordCollectionList(workspaceName, auth).forEach(workspace::addCollection);
  
          return workspace;
      }
  
      private List<SwordCollection> buildSwordCollectionList(String workspaceName, AuthCredentials auth) {
          String baseURL = MCRFrontendUtil.getBaseURL();
          List<SwordCollection> swordCollections = new ArrayList<>();
  
          MCRSword.getCollectionsOfWorkspace(workspaceName).stream()
              .map(collection -> new AbstractMap.SimpleEntry<>(collection, MCRSword.getCollection(collection)))
              .filter(collectionEntry -> collectionEntry.getValue().isVisible())
              .forEach(collection -> {
                  SwordCollection swordCollection = new SwordCollection();
                  final String collectionTitle = collection.getKey();
                  swordCollection.setTitle(collectionTitle);
  
                  // add the supported packaging to the collection Provider
                  final MCRSwordCollectionProvider collectionProvider = collection.getValue();
                  collectionProvider.getSupportedPagacking().forEach(swordCollection::addAcceptPackaging);
  
                  swordCollection.setHref(baseURL + MCRSwordConstants.SWORD2_COL_IRI + collectionTitle + "/");
                  swordCollections.add(swordCollection);
              });
  
          return swordCollections;
      }
  }