/*
    * Copyright 2022 the original author or authors.
    *
    * Licensed 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.bremersee.acl.spring.data.mongodb.convert;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Objects;
  import org.bremersee.acl.Ace;
  import org.bremersee.acl.Acl;
  import org.bson.Document;
  import org.springframework.core.convert.converter.Converter;
  import org.springframework.data.convert.ReadingConverter;
  import org.springframework.lang.NonNull;
  
  /**
   * The document to acl converter.
   *
   * @author Christian Bremer
   */
  @ReadingConverter
  public class DocumentToAclConverter implements Converter<Document, Acl> {
  
    private final DocumentToAceConverter aceConverter = new DocumentToAceConverter();
  
    /**
     * Instantiates a new document to acl converter.
     */
    public DocumentToAclConverter() {
    }
  
    @Override
    public Acl convert(@NonNull Document source) {
      String owner = source.getString(Acl.OWNER);
      Object entries = source.get(Acl.ENTRIES);
      Map<String, Ace> permissionMap = new HashMap<>();
      if (entries instanceof Map) {
        //noinspection unchecked
        Map<String, Object> entryMap = (Map<String, Object>) entries;
        for (Map.Entry<String, Object> entry : entryMap.entrySet()) {
          String permission = entry.getKey();
          Object aceObj = entry.getValue();
          if (aceObj instanceof Ace) {
            permissionMap.put(permission, (Ace) aceObj);
          } else if (aceObj instanceof Map) {
            //noinspection unchecked
            Map<String, Object> aceMap = (Map<String, Object>) aceObj;
            Ace ace = aceConverter.convert(new Document(aceMap));
            permissionMap.put(permission, ace);
          }
        }
      }
      return Acl.builder()
          .owner(owner)
          .permissionMap(permissionMap)
          .build();
    }
  
    @Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      return o != null && getClass() == o.getClass();
    }
  
    @Override
    public int hashCode() {
      return Objects.hashCode(getClass());
    }
  
  }