/*
 * 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.annotation;

import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;
import static org.apache.juneau.internal.ArrayUtils.*;

import java.lang.annotation.*;

import org.apache.juneau.*;
import org.apache.juneau.reflect.*;
import org.apache.juneau.svl.*;

/**
 * Utility classes and methods for the {@link Beanp @Beanp} annotation.
 *
 * <h5 class='section'>See Also:</h5><ul>
 * </ul>
 */
public class BeanpAnnotation {

   //-----------------------------------------------------------------------------------------------------------------
   // Static
   //-----------------------------------------------------------------------------------------------------------------

   /** Default value */
   public static final Beanp DEFAULT = create().build();

   /**
    * Instantiates a new builder for this class.
    *
    * @return A new builder object.
    */
   public static Builder create() {
      return new Builder();
   }

   /**
    * Instantiates a new builder for this class.
    *
    * @param on The targets this annotation applies to.
    * @return A new builder object.
    */
   public static Builder create(String...on) {
      return create().on(on);
   }

   /**
    * Creates a copy of the specified annotation.
    *
    * @param a The annotation to copy.s
    * @param r The var resolver for resolving any variables.
    * @return A copy of the specified annotation.
    */
   public static Beanp copy(Beanp a, VarResolverSession r) {
      return
         create()
         .dictionary(a.dictionary())
         .format(r.resolve(a.format()))
         .name(r.resolve(a.name()))
         .on(r.resolve(a.on()))
         .params(a.params())
         .properties(r.resolve(a.properties()))
         .ro(r.resolve(a.ro()))
         .type(a.type())
         .value(r.resolve(a.value()))
         .wo(r.resolve(a.wo()))
         .build();
   }

   //-----------------------------------------------------------------------------------------------------------------
   // Builder
   //-----------------------------------------------------------------------------------------------------------------

   /**
    * Builder class.
    *
    * <h5 class='section'>See Also:</h5><ul>
    *    <li class='jm'>{@link org.apache.juneau.BeanContext.Builder#annotations(Annotation...)}
    * </ul>
    */
   public static class Builder extends TargetedAnnotationMFBuilder<Builder> {

      Class<?> type=void.class;
      Class<?>[] dictionary=new Class[0], params=new Class[0];
      String format="", name="", properties="", ro="", value="", wo="";

      /**
       * Constructor.
       */
      protected Builder() {
         super(Beanp.class);
      }

      /**
       * Instantiates a new {@link Beanp @Beanp} object initialized with this builder.
       *
       * @return A new {@link Beanp @Beanp} object.
       */
      public Beanp build() {
         return new Impl(this);
      }

      /**
       * Sets the {@link Beanp#dictionary()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder dictionary(Class<?>...value) {
         this.dictionary = value;
         return this;
      }

      /**
       * Sets the {@link Beanp#format()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder format(String value) {
         this.format = value;
         return this;
      }

      /**
       * Sets the {@link Beanp#name()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder name(String value) {
         this.name = value;
         return this;
      }

      /**
       * Sets the {@link Beanp#params()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder params(Class<?>...value) {
         this.params = value;
         return this;
      }

      /**
       * Sets the {@link Beanp#properties()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder properties(String value) {
         this.properties = value;
         return this;
      }

      /**
       * Sets the {@link Beanp#ro()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder ro(String value) {
         this.ro = value;
         return this;
      }

      /**
       * Sets the {@link Beanp#type()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder type(Class<?> value) {
         this.type = value;
         return this;
      }

      /**
       * Sets the {@link Beanp#value()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder value(String value) {
         this.value = value;
         return this;
      }

      /**
       * Sets the {@link Beanp#wo()} property on this annotation.
       *
       * @param value The new value for this property.
       * @return This object.
       */
      public Builder wo(String value) {
         this.wo = value;
         return this;
      }

   }

   //-----------------------------------------------------------------------------------------------------------------
   // Implementation
   //-----------------------------------------------------------------------------------------------------------------

   private static class Impl extends TargetedAnnotationImpl implements Beanp {

      private final Class<?> type;
      private final Class<?>[] params, dictionary;
      private final String name, value, properties, format, ro, wo;

      Impl(Builder b) {
         super(b);
         this.dictionary = copyOf(b.dictionary);
         this.format = b.format;
         this.name = b.name;
         this.params = copyOf(b.params);
         this.properties = b.properties;
         this.ro = b.ro;
         this.type = b.type;
         this.value = b.value;
         this.wo = b.wo;
         postConstruct();
      }

      @Override /* Beanp */
      public Class<?>[] dictionary() {
         return dictionary;
      }

      @Override /* Beanp */
      public String format() {
         return format;
      }

      @Override /* Beanp */
      public String name() {
         return name;
      }

      @Override /* Beanp */
      public Class<?>[] params() {
         return params;
      }

      @Override /* Beanp */
      public String properties() {
         return properties;
      }

      @Override /* Beanp */
      public String ro() {
         return ro;
      }

      @Override /* Beanp */
      public Class<?> type() {
         return type;
      }

      @Override /* Beanp */
      public String value() {
         return value;
      }

      @Override /* Beanp */
      public String wo() {
         return wo;
      }
   }

   //-----------------------------------------------------------------------------------------------------------------
   // Appliers
   //-----------------------------------------------------------------------------------------------------------------

   /**
    * Applies targeted {@link Beanp} annotations to a {@link org.apache.juneau.BeanContext.Builder}.
    */
   public static class Applier extends AnnotationApplier<Beanp,BeanContext.Builder> {

      /**
       * Constructor.
       *
       * @param vr The resolver for resolving values in annotations.
       */
      public Applier(VarResolverSession vr) {
         super(Beanp.class, BeanContext.Builder.class, vr);
      }

      @Override
      public void apply(AnnotationInfo<Beanp> ai, BeanContext.Builder b) {
         Beanp a = ai.inner();
         if (isEmptyArray(a.on()))
            return;
         b.annotations(copy(a, vr()));
      }
   }

   //-----------------------------------------------------------------------------------------------------------------
   // Other
   //-----------------------------------------------------------------------------------------------------------------

   /**
    * A collection of {@link Beanp @Beanp annotations}.
    */
   @Documented
   @Target({METHOD,TYPE})
   @Retention(RUNTIME)
   @Inherited
   public static @interface Array {

      /**
       * The child annotations.
       *
       * @return The annotation value.
       */
      Beanp[] value();
   }
}