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/*
 * Copyright 2015 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.way.code;

import java.util.List;

import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.DeclaredType;

import br.com.objectos.way.core.auto.AutoPojo;
import br.com.objectos.way.core.lang.Lazy;

import com.google.common.base.Function;
import com.google.common.base.Optional;

/**
 * @author [email protected] (Marcio Endo)
 */
@AutoPojo
abstract class AnnotationInfoAnnotationMirror extends AnnotationInfo {

  abstract ProcessingEnvironmentWrapper processingEnv();
  abstract AnnotationMirror annotation();
  @Override
  abstract PackageInfo packageInfo();
  @Override
  abstract AccessInfo accessInfo();
  @Override
  abstract String name();

  private final Lazy annotationValueInfoMap = new LazyAnnotationValueInfoMap();
  private final Lazy> enclosingTypeInfo = new LazyEnclosingTypeInfo();
  private final Lazy annotationInfoMap = new LazyAnnotationInfoMap();

  AnnotationInfoAnnotationMirror() {
  }

  public static AnnotationInfoAnnotationMirrorBuilder builder() {
    return new AnnotationInfoAnnotationMirrorBuilderPojo();
  }

  @Override
  AnnotationValueInfoMap annotationValueInfoMap() {
    return annotationValueInfoMap.get();
  }

  @Override
  Optional enclosingTypeInfo() {
    return enclosingTypeInfo.get();
  }

  @Override
  public AnnotationInfoMap annotationInfoMap() {
    return annotationInfoMap.get();
  }

  private Element element() {
    DeclaredType annotationType = annotation().getAnnotationType();
    return annotationType.asElement();
  }

  private class LazyAnnotationValueInfoMap extends Lazy {
    @Override
    protected AnnotationValueInfoMap compute() {
      return AnnotationValueWrapper.wrapAll(processingEnv(), annotation())
          .transform(AnnotationValueWrapperToAnnotationValueInfo.get())
          .asMap(new Function, AnnotationValueInfoMap>() {
            @Override
            public AnnotationValueInfoMap apply(List input) {
              return AnnotationValueInfoMap.mapOf(input);
            }
          });
    }
  }

  private class LazyEnclosingTypeInfo extends Lazy> {
    @Override
    protected Optional compute() {
      Optional res = Optional.absent();

      Element enclosingElement = element().getEnclosingElement();
      if (Apt.isType(enclosingElement)) {
        TypeElement typeElement = TypeElement.class.cast(enclosingElement);
        SimpleTypeInfo simpleTypeInfo = SimpleTypeInfoTypeElement.wrap(processingEnv(), typeElement);
        res = Optional.of(simpleTypeInfo);
      }

      return res;
    }
  }

  private class LazyAnnotationInfoMap extends Lazy {
    @Override
    protected AnnotationInfoMap compute() {
      AnnotationInfoMap map = AnnotationInfoMap.emptyMap();

      if (!packageInfo().isJavaLang() && !packageInfo().hasName("java.lang.annotation")) {
        map = AnnotationMirrorWrapper.wrapAllAndMap(processingEnv(), element());
      }

      return map;
    }
  }

}