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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.way.code;

import java.util.Optional;
import java.util.Set;

import javax.lang.model.element.Modifier;

/**
 * @author [email protected] (Marcio Endo)
 */
public enum AccessInfo {

  PUBLIC,

  PROTECTED,

  DEFAULT {
    @Override
    Optional toJdk() {
      return Optional.empty();
    }

    @Override
    String declaration() {
      return "";
    }
  },

  PRIVATE;

  public static Optional fromJdk(Set modifiers) {
    return modifiers.stream()
        .map(m -> {
          try {
            AccessInfo accessInfo = AccessInfo.valueOf(m.name());
            return Optional.of(accessInfo);
          } catch (IllegalArgumentException e) {
            return Optional. empty();
          }
        })
        .filter(Optional::isPresent)
        .map(Optional::get)
        .findFirst();
  }

  @Override
  public String toString() {
    return name().toLowerCase();
  }

  public Modifier[] modifiers() {
    return toJdk()
        .map(m -> new Modifier[] { m })
        .orElse(new Modifier[] {});
  }

  public void writeTo(StringBuilder builder) {
    builder.append(toString());
  }

  Optional toJdk() {
    Modifier modifier = Modifier.valueOf(name());
    return Optional.of(modifier);
  }

  String declaration() {
    return name().toLowerCase() + " ";
  }

}