// ***************************************************************************************************************************
// * 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.juneau.dto.openapi3;

import static org.apache.juneau.common.internal.StringUtils.*;
import static org.apache.juneau.internal.CollectionUtils.*;
import static org.apache.juneau.internal.ConverterUtils.*;

import org.apache.juneau.UriResolver;
import org.apache.juneau.annotation.Bean;
import org.apache.juneau.internal.*;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

/**
 * Used to aid in serialization, deserialization, and validation.
 */
@Bean(properties="propertyName,mapping,*")
@FluentSetters
public class Discriminator extends OpenApiElement {

   private String propertyName;
   private Map<String,String> mapping;

   /**
    * Default constructor.
    */
   public Discriminator() {}

   /**
    * Copy constructor.
    *
    * @param copyFrom The object to copy.
    */
   public Discriminator(Discriminator copyFrom) {
      super(copyFrom);

      this.propertyName = copyFrom.propertyName;
      if (copyFrom.mapping == null)
         this.mapping = null;
      else
         this.mapping = new LinkedHashMap<>(copyFrom.mapping);
   }

   /**
    * Make a deep copy of this object.
    *
    * @return A deep copy of this object.
    */
   public Discriminator copy() {
      return new Discriminator(this);
   }

   /**
    * Bean property getter:  <property>propertyName</property>.
    *
    * <p>
    * A short description of the target documentation.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public String getPropertyName() {
      return propertyName;
   }

   /**
    * Bean property setter:  <property>propertyName</property>.
    *
    * <p>
    * A short description of the target documentation.
    *
    * @param value
    *    The new value for this property.
    *    <br>Can be <jk>null</jk> to unset the property.
    * @return This object
    */
   public Discriminator setPropertyName(String value) {
      propertyName = value;
      return this;
   }

   /**
    * Bean property getter:  <property>mapping</property>.
    *
    * <p>
    * The URL for the target documentation.
    *
    * @return The property value, or <jk>null</jk> if it is not set.
    */
   public Map<String,String> getMapping() {
      return mapping;
   }

   /**
    * Bean property setter:  <property>mapping</property>.
    *
    * <p>
    * The URL for the target documentation.
    *
    * @param value
    *    The new value for this property.
    *    <br>Property value is required.
    *    <br>URIs defined by {@link UriResolver} can be used for values.
    * @return This object
    */
   public Discriminator setMapping(Map<String,String> value) {
      mapping = copyOf(value);
      return this;
   }

   /**
    * Adds one or more values to the <property>mapping</property> property.
    *
    * @param key The key.
    * @param value The value.
    * @return This object
    */
   public Discriminator addMapping(String key, String value) {
      mapping = mapBuilder(mapping).sparse().add(key, value).build();
      return this;
   }

   // <FluentSetters>

   // </FluentSetters>

   @Override /* OpenApiElement */
   public <T> T get(String property, Class<T> type) {
      if (property == null)
         return null;
      switch (property) {
         case "propertyName": return toType(getPropertyName(), type);
         case "mapping": return toType(getMapping(), type);
         default: return super.get(property, type);
      }
   }

   @Override /* OpenApiElement */
   public Discriminator set(String property, Object value) {
      if (property == null)
         return this;
      switch (property) {
         case "propertyName": return setPropertyName(stringify(value));
         case "mapping": return setMapping(mapBuilder(String.class,String.class).sparse().addAny(value).build());
         default:
            super.set(property, value);
            return this;
      }
   }

   @Override /* OpenApiElement */
   public Set<String> keySet() {
      Set<String> s = setBuilder(String.class)
         .addIf(propertyName != null, "propertyName")
         .addIf(mapping != null, "mapping")
         .build();
      return new MultiSet<>(s, super.keySet());
   }
}