package jalview.schemes;

import jalview.api.ColorI;

import java.awt.Color;

public class Colour implements ColorI
{
  public static final ColorI lightGray = new Colour(Color.lightGray);

  public static final ColorI gray = new Colour(Color.gray);

  public static final ColorI blue = new Colour(Color.blue);

  public static final ColorI yellow = new Colour(Color.yellow);

  public static final ColorI red = new Colour(Color.red);

  public static final ColorI black = new Colour(Color.black);

  public static final ColorI white = new Colour(Color.white);

  public static final ColorI pink = new Colour(Color.pink);

  public static final ColorI green = new Colour(Color.green);

  public static final ColorI magenta = new Colour(Color.magenta);

  public static final ColorI orange = new Colour(Color.orange);

  private int greenValue;

  private int blueValue;

  private int redValue;

  public Colour(Color c)
  {
    this(c.getRed(), c.getGreen(), c.getBlue());
  }

  /**
   * Constructor given RGB values in the range 0-255
   * 
   * @param r
   * @param g
   * @param b
   */
  public Colour(int r, int g, int b)
  {
    redValue = r;
    greenValue = g;
    blueValue = b;
  }

  /**
   * Constructor given an rgb value
   * 
   * @param rgb
   */
  public Colour(int rgb)
  {
    this((rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, (rgb >> 0) & 0xFF);
  }

  /**
   * Constructor given RGB values in the range 0-1
   * 
   * @param r
   * @param g
   * @param b
   */
  public Colour(float r, float g, float b)
  {
    this((int) (r * 255 + 0.5), (int) (g * 255 + 0.5),
            (int) (b * 255 + 0.5));
  }

  @Override
  public int getGreen()
  {
    return greenValue;
  }

  @Override
  public int getBlue()
  {
    return blueValue;
  }

  @Override
  public int getRed()
  {
    return redValue;
  }

  /**
   * 
   * @see java.awt.Color#Color(int, int, int, int)
   */
  @Override
  public int getRGB()
  {
    int value = ((255 & 0xFF) << 24) |
            ((redValue & 0xFF) << 16) |
            ((greenValue & 0xFF) << 8)  |
            ((blueValue & 0xFF) << 0);  
    return value;
  }

  @Override
  public int hashCode()
  {
    return getRGB();
  }

  @Override
  public boolean equals(Object obj)
  {
    if (obj instanceof Colour)
    {
      return getRGB() == ((Colour) obj).getRGB();
    }
    return false;
  }

}