/*
    * 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.pi.frontend;
  
  import java.util.Locale;
  
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.jdom2.Element;
  import org.jdom2.JDOMException;
  import org.jdom2.output.DOMOutputter;
  import org.mycore.access.MCRAccessManager;
  import org.mycore.datamodel.metadata.MCRBase;
  import org.mycore.datamodel.metadata.MCRMetadataManager;
  import org.mycore.datamodel.metadata.MCRObjectID;
  import org.mycore.pi.MCRPIManager;
  import org.mycore.pi.MCRPIService;
  import org.mycore.pi.MCRPIServiceManager;
  import org.mycore.pi.MCRPersistentIdentifier;
  import org.mycore.pi.exceptions.MCRPersistentIdentifierException;
  import org.w3c.dom.NodeList;
  
  public class MCRIdentifierXSLUtils {
  
      private static final Logger LOGGER = LogManager.getLogger();
  
      public static boolean hasIdentifierCreated(String service, String id, String additional) {
          MCRPIService<MCRPersistentIdentifier> registrationService = MCRPIServiceManager
              .getInstance().getRegistrationService(service);
          return registrationService.isCreated(MCRObjectID.getInstance(id), additional);
      }
  
      public static boolean hasIdentifierRegistrationStarted(String service, String id, String additional) {
          MCRPIService<MCRPersistentIdentifier> registrationService = MCRPIServiceManager
              .getInstance().getRegistrationService(service);
          return registrationService.hasRegistrationStarted(MCRObjectID.getInstance(id), additional);
      }
  
      public static boolean hasIdentifierRegistered(String service, String id, String additional) {
          MCRPIService<MCRPersistentIdentifier> registrationService = MCRPIServiceManager
              .getInstance().getRegistrationService(service);
          return registrationService.isRegistered(MCRObjectID.getInstance(id), additional);
      }
  
      public static boolean hasManagedPI(String objectID) {
          return MCRPIManager.getInstance()
              .getRegistered(MCRMetadataManager.retrieveMCRObject(MCRObjectID.getInstance(objectID))).size() > 0;
      }
  
      public static boolean isManagedPI(String pi, String id) {
          return MCRPIManager.getInstance().getInfo(pi).stream().anyMatch(info -> info.getMycoreID()
              .equals(id));
      }
  
      /**
       * Gets all available services which are configured.
       * e.g.
       * <ul>
       * <li>&lt;service id="service1" inscribed="false" permission="true" type="urn" /&gt;</li>
       * <li>&lt;service id="service2" inscribed="true" permission="false" type="doi" /&gt;</li>
       * </ul>
       *
       * @param objectID the object
       * @return a Nodelist
       * @throws JDOMException
       */
      public static NodeList getPIServiceInformation(String objectID) throws JDOMException {
          Element e = new Element("list");
  
          MCRBase obj = MCRMetadataManager.retrieve(MCRObjectID.getInstance(objectID));
          MCRPIServiceManager.getInstance().getServiceList()
              .stream()
              .map((rs -> {
                  Element service = new Element("service");
  
                  service.setAttribute("id", rs.getServiceID());
  
                  // Check if the inscriber of this service can read a PI
                  try {
                      if (rs.getMetadataService().getIdentifier(obj, "").isPresent()) {
                          service.setAttribute("inscribed", "true");
                      } else {
                          service.setAttribute("inscribed", "false");
                     }
                 } catch (MCRPersistentIdentifierException e1) {
                     LOGGER.warn("Error happened while try to read PI from object: {}", objectID, e1);
                     service.setAttribute("inscribed", "false");
                 }
 
                 // rights
                 String permission = "register-" + rs.getServiceID();
                 Boolean canRegister = MCRAccessManager.checkPermission(objectID, "writedb") &&
                     MCRAccessManager.checkPermission(obj.getId(), permission);
 
                 service.setAttribute("permission", canRegister.toString().toLowerCase(Locale.ROOT));
 
                 // add the type
                 service.setAttribute("type", rs.getType());
 
                 return service;
             }))
             .forEach(e::addContent);
         return new DOMOutputter().output(e).getElementsByTagName("service");
     }
 
 }