/*
    * 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.provisioning.api.serialization;
  
  import com.fasterxml.jackson.core.JsonParser;
  import com.fasterxml.jackson.databind.DeserializationContext;
  import com.fasterxml.jackson.databind.JsonDeserializer;
  import com.fasterxml.jackson.databind.JsonNode;
  import com.fasterxml.jackson.databind.node.ObjectNode;
  import java.io.IOException;
  import java.util.Base64;
  import java.util.Objects;
  import org.identityconnectors.framework.common.objects.SyncToken;
  
  class SyncTokenDeserializer extends JsonDeserializer<SyncToken> {
  
      @Override
      public SyncToken deserialize(final JsonParser jp, final DeserializationContext ctx)
              throws IOException {
  
          ObjectNode tree = jp.readValueAsTree();
  
          Object value = tree.has("value")
                  ? tree.has("type")
                  ? deserialize(tree.get("value"), tree.get("type"))
                  : deserialize(tree.get("value"))
                  : null;
  
          return new SyncToken(Objects.requireNonNull(value));
      }
  
      private Object deserialize(final JsonNode value, final JsonNode type) {
          if (Boolean.class.getSimpleName().equals(type.asText())) {
              return value.asBoolean();
          }
  
          if (Double.class.getSimpleName().equals(type.asText())) {
              return value.asDouble();
          }
          if (Long.class.getSimpleName().equals(type.asText())) {
              return value.asLong();
          }
          if (Integer.class.getSimpleName().equals(type.asText())) {
              return value.asInt();
          }
  
          return value.asText();
      }
  
      private Object deserialize(final JsonNode value) {
          if (value.isBoolean()) {
              return value.asBoolean();
          }
  
          if (value.isDouble()) {
              return value.asDouble();
          }
  
          if (value.isLong()) {
              return value.asLong();
          }
  
          if (value.isInt()) {
              return value.asInt();
          }
  
          try {
              return Base64.getDecoder().decode(value.asText());
          } catch (RuntimeException e) {
              return value.asText();
          }
      }
  }