/*
 * Copyright 2013-2016 consulo.io
 *
 * 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 consulo.language.icon;

import consulo.ui.image.Image;
import consulo.ui.image.ImageEffects;
import consulo.util.collection.ArrayUtil;

import jakarta.annotation.Nonnull;
import jakarta.annotation.Nullable;

/**
 * @author VISTALL
 * @since 0:07/19.07.13
 */
public class IconDescriptor {
  private Image[] myLayerIcons = Image.EMPTY_ARRAY;
  private Image myRightIcon;
  private Image myMainIcon;

  public IconDescriptor(@Nullable Image mainIcon) {
    myMainIcon = mainIcon;
  }

  @Nullable
  public Image getMainIcon() {
    return myMainIcon;
  }

  public IconDescriptor setMainIcon(@Nullable Image mainIcon) {
    myMainIcon = mainIcon;
    return this;
  }

  public IconDescriptor addLayerIcon(@Nonnull Image icon) {
    myLayerIcons = ArrayUtil.append(myLayerIcons, icon);
    return this;
  }

  public IconDescriptor removeLayerIcon(@Nonnull Image icon) {
    myLayerIcons = ArrayUtil.remove(myLayerIcons, icon);
    return this;
  }

  public IconDescriptor clearLayerIcons() {
    myLayerIcons = Image.EMPTY_ARRAY;
    return this;
  }

  @Nullable
  public Image getRightIcon() {
    return myRightIcon;
  }

  public void setRightIcon(@Nullable Image rightIcon) {
    myRightIcon = rightIcon;
  }

  @Nonnull
  public Image toIcon() {
    Image mainIcon;
    if(myLayerIcons.length == 0) {
      mainIcon = myMainIcon;
    }
    else {
      mainIcon = ImageEffects.layered(ArrayUtil.mergeArrays(new Image[]{myMainIcon}, myLayerIcons));
    }

    if(myRightIcon == null) {
      return mainIcon == null ? Image.empty(16) : mainIcon;
    }
    else {
      return ImageEffects.appendRight(mainIcon, myRightIcon);
    }
  }
}
