/*
    * 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;
  
  import static org.apache.juneau.commons.utils.AssertionUtils.*;
  import static org.apache.juneau.commons.utils.Utils.*;
  
  import java.lang.annotation.*;
  import java.lang.reflect.*;
  import java.util.*;
  import java.util.stream.*;
  
  import org.apache.juneau.annotation.*;
  import org.apache.juneau.commons.reflect.*;
  import org.apache.juneau.svl.*;
  
  /**
   * A list of {@link AnnotationWork} objects.
   *
   * @serial exclude
   */
  public class AnnotationWorkList extends ArrayList<AnnotationWork> {
  	private static final long serialVersionUID = 1L;
  
  	/**
  	 * Static creator.
  	 *
  	 * @return A new list.
  	 */
  	public static AnnotationWorkList create() {
  		return new AnnotationWorkList(VarResolver.DEFAULT.createSession());
  	}
  
  	/**
  	 * Static creator.
  	 *
  	 * @param vrs The variable resolver.
  	 * @return A new list.
  	 */
  	public static AnnotationWorkList create(VarResolverSession vrs) {
  		return new AnnotationWorkList(vrs);
  	}
  
  	/**
  	 * Static creator.
  	 *
  	 * @param annotations The annotations to create work from.
  	 * @return A new list.
  	 */
  	public static AnnotationWorkList of(Stream<AnnotationInfo<? extends Annotation>> annotations) {
  		return create().add(annotations);
  	}
  
  	/**
  	 * Static creator.
  	 *
  	 * @param vrs The variable resolver.
  	 * @param annotations The annotations to create work from.
  	 * @return A new list.
  	 */
  	public static AnnotationWorkList of(VarResolverSession vrs, Stream<AnnotationInfo<? extends Annotation>> annotations) {
  		return create(vrs).add(annotations);
  	}
  
  	private final VarResolverSession vrs;
  
  	private AnnotationWorkList(VarResolverSession vrs) {
  		this.vrs = assertArgNotNull("vrs", vrs);
  	}
  
  	/**
  	 * Adds an entry to this list.
  	 *
  	 * @param ai The annotation being applied.
  	 * @param aa The applier for the annotation.
  	 * @return This object.
  	 */
  	public AnnotationWorkList add(AnnotationInfo<?> ai, AnnotationApplier<Annotation,Object> aa) {
  		add(new AnnotationWork(ai, aa));
  		return this;
  	}
  
  	/**
  	 * Adds entries for the specified annotations to this work list.
  	 *
 	 * @param annotations The annotations to create work from.
 	 * @return This object.
 	 */
 	public AnnotationWorkList add(Stream<AnnotationInfo<? extends Annotation>> annotations) {
 		annotations.sorted(Comparator.comparingInt(AnnotationInfo::getRank)).forEach(this::applyAnnotation);
 		return this;
 	}
 
 	/**
 	 * Helper method to extract and apply annotation appliers for a given annotation.
 	 *
 	 * @param ai The annotation info to process.
 	 */
 	@SuppressWarnings("unchecked")
 	private void applyAnnotation(AnnotationInfo<?> ai) {
 		var a = ai.inner();
 		var cpa = assertNotNull(a.annotationType().getAnnotation(ContextApply.class), "Annotation found without @ContextApply: %s", cn(ai.annotationType()));
 		Arrays.stream(cpa.value())
 			.map(x -> safe(() -> (Constructor<? extends AnnotationApplier<?,?>>)x.getConstructor(VarResolverSession.class)))
 			.forEach(applyConstructor -> {
 				var applier = safe(() -> (AnnotationApplier<Annotation,Object>)applyConstructor.newInstance(vrs));
 				add(ai, applier);
 			});
 	}
 }