/*
    * 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.persistence.jpa.entity;
  
  import java.util.Collection;
  import java.util.List;
  import java.util.Optional;
  import java.util.stream.Collectors;
  import org.apache.syncope.core.persistence.api.entity.Any;
  import org.apache.syncope.core.persistence.api.entity.GroupablePlainAttr;
  import org.apache.syncope.core.persistence.api.entity.GroupableRelatable;
  import org.apache.syncope.core.persistence.api.entity.Membership;
  import org.apache.syncope.core.persistence.api.entity.Relationship;
  import org.apache.syncope.core.persistence.api.entity.RelationshipType;
  
  public abstract class AbstractGroupableRelatable<
          L extends Any<P>, 
          M extends Membership<L>, 
          P extends GroupablePlainAttr<L, M>,
          R extends Any<?>,
          REL extends Relationship<L, R>>
          extends AbstractAny<P> implements GroupableRelatable<L, M, P, R, REL> {
  
      private static final long serialVersionUID = -2269285197388729673L;
  
      protected abstract List<? extends P> internalGetPlainAttrs();
  
      @Override
      public boolean remove(final P attr) {
          return internalGetPlainAttrs().remove(attr);
      }
  
      @Override
      public Optional<? extends P> getPlainAttr(final String plainSchema) {
          return internalGetPlainAttrs().stream().
                  filter(attr -> attr != null && attr.getSchema() != null && attr.getMembership() == null
                  && plainSchema.equals(attr.getSchema().getKey())).
                  findFirst();
      }
  
      @Override
      public Optional<? extends P> getPlainAttr(final String plainSchema, final Membership<?> membership) {
          return internalGetPlainAttrs().stream().
                  filter(attr -> attr != null && attr.getSchema() != null
                  && attr.getMembership() != null && attr.getMembership().equals(membership)
                  && plainSchema.equals(attr.getSchema().getKey())).
                  findFirst();
      }
  
      @Override
      public List<? extends P> getPlainAttrs() {
          return internalGetPlainAttrs().stream().
                  filter(attr -> attr != null && attr.getSchema() != null && attr.getMembership() == null).
                  collect(Collectors.toList());
      }
  
      @Override
      public Collection<? extends P> getPlainAttrs(final String plainSchema) {
          return internalGetPlainAttrs().stream().
                  filter(attr -> attr != null && attr.getSchema() != null
                  && plainSchema.equals(attr.getSchema().getKey())).
                  collect(Collectors.toList());
      }
  
      @Override
      public Collection<? extends P> getPlainAttrs(final Membership<?> membership) {
          return internalGetPlainAttrs().stream().
                  filter(attr -> attr != null && attr.getSchema() != null && membership.equals(attr.getMembership())).
                  collect(Collectors.toList());
      }
  
      @Override
      public Optional<? extends M> getMembership(final String groupKey) {
          return getMemberships().stream().
                  filter(membership -> groupKey != null && groupKey.equals(membership.getRightEnd().getKey())).
                  findFirst();
      }
  
      @Override
      public Collection<? extends REL> getRelationships(final RelationshipType relationshipType) {
          return getRelationships().stream().
                  filter(relationship -> relationshipType != null && relationshipType.equals(relationship.getType())).
                  collect(Collectors.toList());
     }
 
     @Override
     public Collection<? extends REL> getRelationships(final String otherEndKey) {
         return getRelationships().stream().
                 filter(relationship -> otherEndKey != null && otherEndKey.equals(relationship.getRightEnd().getKey())).
                 collect(Collectors.toList());
     }
 }