/*
    * Copyright (c) 2002-2026 Gargoyle Software Inc.
    *
    * 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
    * https://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 org.htmlunit.html.impl;
  
  import java.util.Objects;
  
  /**
   * Our own implementation of color to be
   * independent of awt (for this).
   *
   * @author Ronald Brill
   * @author Ashutosh Panda
   */
  @SuppressWarnings("PMD.AvoidDuplicateLiterals")
  public class Color {
      private final int red_;
      private final int green_;
      private final int blue_;
      private final int alpha_;
  
      /**
       * Ctor (using an alpha of 255).
       *
       * @param red the red part
       * @param green the green part
       * @param blue the blue part
       */
      public Color(final int red, final int green, final int blue) {
          this(red, green, blue, 255);
      }
  
      /**
       * Ctor.
       *
       * @param red the red part
       * @param green the green part
       * @param blue the blue part
       * @param alpha the alpha part
       */
      public Color(final int red, final int green, final int blue, final int alpha) {
          if (red < 0 || red > 255) {
              throw new IllegalArgumentException("Color red value '" + red + " outside of expected range");
          }
          if (green < 0 || green > 255) {
              throw new IllegalArgumentException("Color green value '" + green + " outside of expected range");
          }
          if (blue < 0 || blue > 255) {
              throw new IllegalArgumentException("Color blue value '" + blue + " outside of expected range");
          }
          if (alpha < 0 || alpha > 255) {
              throw new IllegalArgumentException("Color red value '" + alpha + " outside of expected range");
          }
  
          red_ = red;
          green_ = green;
          blue_ = blue;
          alpha_ = alpha;
      }
  
      /**
       * Returns the red part.
       *
       * @return the red part
       */
      public int getRed() {
          return red_;
      }
  
      /**
       * Returns the green part.
       *
       * @return the green part
       */
      public int getGreen() {
          return green_;
      }
  
      /**
       * Returns the blue part.
       *
       * @return the blue part
       */
      public int getBlue() {
          return blue_;
      }
  
      /**
      * Returns the alpha part.
      *
      * @return the alpha part
      */
     public int getAlpha() {
         return alpha_;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public int hashCode() {
         return Objects.hash(red_, green_, blue_, alpha_);
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public boolean equals(final Object obj) {
         if (this == obj) {
             return true;
         }
         if (obj == null) {
             return false;
         }
         if (getClass() != obj.getClass()) {
             return false;
         }
 
         final Color other = (Color) obj;
         if (alpha_ != other.alpha_) {
             return false;
         }
         if (blue_ != other.blue_) {
             return false;
         }
         if (green_ != other.green_) {
             return false;
         }
         return red_ == other.red_;
     }
 }