/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.syncope.core.logic;
  
  import java.lang.reflect.Method;
  import java.util.List;
  import java.util.Optional;
  import java.util.stream.Collectors;
  import org.apache.commons.lang3.ArrayUtils;
  import org.apache.syncope.common.lib.to.SAML2SPEntityTO;
  import org.apache.syncope.common.lib.types.AMEntitlement;
  import org.apache.syncope.common.lib.types.IdRepoEntitlement;
  import org.apache.syncope.core.persistence.api.dao.NotFoundException;
  import org.apache.syncope.core.persistence.api.dao.SAML2SPEntityDAO;
  import org.apache.syncope.core.persistence.api.entity.am.SAML2SPEntity;
  import org.apache.syncope.core.provisioning.api.data.SAML2SPEntityDataBinder;
  import org.springframework.security.access.prepost.PreAuthorize;
  import org.springframework.transaction.annotation.Transactional;
  
  public class SAML2SPEntityLogic extends AbstractTransactionalLogic<SAML2SPEntityTO> {
  
      protected final SAML2SPEntityDataBinder binder;
  
      protected final SAML2SPEntityDAO entityDAO;
  
      public SAML2SPEntityLogic(final SAML2SPEntityDataBinder binder, final SAML2SPEntityDAO entityDAO) {
          this.binder = binder;
          this.entityDAO = entityDAO;
      }
  
      @PreAuthorize("hasRole('" + AMEntitlement.SAML2_SP_ENTITY_LIST + "')")
      @Transactional(readOnly = true)
      public List<SAML2SPEntityTO> list() {
          return entityDAO.findAll().stream().
                  map(binder::getSAML2SPEntityTO).
                  collect(Collectors.toList());
      }
  
      @PreAuthorize("hasRole('" + AMEntitlement.SAML2_SP_ENTITY_GET + "') "
              + "or hasRole('" + IdRepoEntitlement.ANONYMOUS + "')")
      @Transactional(readOnly = true)
      public SAML2SPEntityTO read(final String key) {
          return Optional.ofNullable(entityDAO.find(key)).
                  map(binder::getSAML2SPEntityTO).
                  orElseThrow(() -> new NotFoundException(key + " not found"));
      }
  
      @PreAuthorize("hasRole('" + AMEntitlement.SAML2_SP_ENTITY_SET + "') "
              + "or hasRole('" + IdRepoEntitlement.ANONYMOUS + "')")
      public SAML2SPEntityTO set(final SAML2SPEntityTO entityTO) {
          SAML2SPEntity entity = Optional.ofNullable(entityDAO.find(entityTO.getKey())).
                  map(metadata -> binder.update(metadata, entityTO)).
                  orElseGet(() -> binder.create(entityTO));
          return binder.getSAML2SPEntityTO(entityDAO.save(entity));
      }
  
      @PreAuthorize("hasRole('" + AMEntitlement.SAML2_SP_ENTITY_DELETE + "')")
      public void delete(final String key) {
          Optional.ofNullable(entityDAO.find(key)).ifPresentOrElse(
                  entityDAO::delete,
                  () -> {
                      throw new NotFoundException(key + " not found");
                  });
      }
  
      @Override
      protected SAML2SPEntityTO resolveReference(final Method method, final Object... args)
              throws UnresolvedReferenceException {
  
          String key = null;
          if (ArrayUtils.isNotEmpty(args)) {
              for (int i = 0; key == null && i < args.length; i++) {
                  if (args[i] instanceof String) {
                      key = (String) args[i];
                  } else if (args[i] instanceof SAML2SPEntityTO) {
                      key = ((SAML2SPEntityTO) args[i]).getKey();
                  }
              }
          }
  
          if (key != null) {
              try {
                  return binder.getSAML2SPEntityTO(entityDAO.find(key));
             } catch (final Throwable ignore) {
                 LOG.debug("Unresolved reference", ignore);
                 throw new UnresolvedReferenceException(ignore);
             }
         }
         throw new UnresolvedReferenceException();
     }
 }