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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 br.com.objectos.way.core.auto.AutoFunctional;
import br.com.objectos.way.core.auto.AutoPojo;
import br.com.objectos.way.core.testing.Testable;

import com.google.common.base.Objects;
import com.google.common.base.Preconditions;

/**
 * @author [email protected] (Marcio Endo)
 */
@AutoPojo
public abstract class AnnotationValueInfo implements Testable {

  @AutoFunctional
  abstract String name();
  abstract AnnotationValueKind kind();
  @AutoFunctional
  abstract Object value();

  AnnotationValueInfo() {
  }

  public static AnnotationValueInfoBuilder builder() {
    return new AnnotationValueInfoBuilderPojo();
  }

  public > E getEnumValue(Class enumType) {
    Preconditions.checkArgument(AnnotationValueKind.ENUM.equals(kind()));
    EnumConstantInfo value = (EnumConstantInfo) value();
    return value.getEnumValue(enumType);
  }

  public String getStringValue() {
    Preconditions.checkArgument(AnnotationValueKind.STRING.equals(kind()));
    return (String) value();
  }

  @Override
  public String toString() {
    return name() + "=" + value();
  }

  public boolean booleanValue() {
    Preconditions.checkArgument(AnnotationValueKind.PRIMITIVE_BOOLEAN.equals(kind()));
    return ((Boolean) value()).booleanValue();
  }

  public char charValue() {
    Preconditions.checkArgument(AnnotationValueKind.PRIMITIVE_CHAR.equals(kind()));
    return ((Character) value()).charValue();
  }

  public int intValue() {
    Preconditions.checkArgument(AnnotationValueKind.PRIMITIVE_INT.equals(kind()));
    return ((Integer) value()).intValue();
  }

  public SimpleTypeInfo simpleTypeInfoValue() {
    Preconditions.checkArgument(AnnotationValueKind.TYPE.equals(kind()));
    return (SimpleTypeInfo) value();
  }

  @Override
  public final int hashCode() {
    return Objects.hashCode(name(), kind(), value());
  }

  @Override
  public final boolean equals(final Object obj) {
    if (obj == this) {
      return true;
    }
    if (obj instanceof AnnotationValueInfo) {
      final AnnotationValueInfo that = (AnnotationValueInfo) obj;
      return name().equals(that.name())
          && kind().equals(that.kind())
          && value().equals(that.value());
    } else {
      return false;
    }
  }

}