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/*
 * Copyright 2014 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.code;

import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

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

/**
 * @author [email protected] (Marcio Endo)
 */
class AnnotationMirrorWrapper {

  private final ProcessingEnvironmentWrapper processingEnv;
  private final AnnotationMirror annotation;

  public AnnotationMirrorWrapper(ProcessingEnvironmentWrapper processingEnv, AnnotationMirror annotation) {
    this.processingEnv = processingEnv;
    this.annotation = annotation;
  }

  public static Stream wrapAll(ProcessingEnvironmentWrapper processingEnv, Element element) {
    return element.getAnnotationMirrors()
        .stream()
        .map(annotation -> {
          DeclaredType type = annotation.getAnnotationType();
          if (TypeKind.ERROR.equals(type.getKind())) {
            throw new CodeGenerationIncompleteException();
          }
          return annotation;
        })
        .map(mirror -> AnnotationMirrorWrapper.wrapperOf(processingEnv, mirror));
  }

  public static List wrapAllAndList(ProcessingEnvironmentWrapper processingEnv, Element element) {
    return wrapAll(processingEnv, element)
        .map(AnnotationMirrorWrapper::toAnnotationInfo)
        .collect(Collectors.toList());
  }

  public static AnnotationMirrorWrapper wrapperOf(
      ProcessingEnvironmentWrapper processingEnv, AnnotationMirror annotation) {
    return new AnnotationMirrorWrapper(processingEnv, annotation);
  }

  AnnotationInfo toAnnotationInfo() {
    DeclaredType annotationType = annotation.getAnnotationType();
    Element element = annotationType.asElement();
    return new AnnotationInfoAnnotationMirror(
        processingEnv,
        annotation,
        packageInfo(element),
        accessInfo(element),
        name(element));
  }

  private AccessInfo accessInfo(Element element) {
    return Apt.accessInfoOf(element);
  }

  private PackageInfo packageInfo(Element element) {
    return Apt.packageInfoOf(processingEnv, element);
  }

  private String name(Element element) {
    return element.getSimpleName().toString();
  }

}