/**
 * The purpose of this utility is to allow ruby-processing users to use an alternative 
 * to processing.org color their sketches (to cope with ruby FixNumber vs java int)
 * Copyright (C) 2015-16 Martin Prout. This tool is free software; you can 
 * redistribute it and/or modify it under the terms of the GNU Lesser General 
 * Public License as published by the Free Software Foundation; either version
 * 2.1 of the License, or (at your option) any later version.
 * 
 * Obtain a copy of the license at http://www.gnu.org/licenses/lgpl-2.1.html
 */
package monkstone;

/**
 *
 * @author Martin Prout
 */
public class ColorUtil {

   /**
     * Returns hex long as a positive int unless greater than Integer.MAX_VALUE
     * else return the complement as a negative integer or something like that
     * @param hexlong long
     * @return rgb int
     */
    static final int hexLong(long hexlong) {
        long SPLIT = Integer.MAX_VALUE + 1;
        if (hexlong < SPLIT) {
            return (int) hexlong;
        } else {
            return (int) (hexlong - SPLIT * 2L);
        }
    }

    /**
     * @param hexstring String
     * @return rgb int
     */
    static public int colorString(String hexstring) {
        return java.awt.Color.decode(hexstring).getRGB();
    }
    
    /**
     *
     * @param web Array of web (hex) String
     * @return array of color int according to java
     */
    
    static public int[] webArray(String[] web){
        int[] result = new int[web.length];
        for (int i = 0; i < web.length; i++ ){
            result[i] = java.awt.Color.decode(web[i]).getRGB();
        }
        return result;
    }
    
   /**
    * Return a ruby string of the form "%w(a b c)" where a, b, c
    * are raw web strings. This string can be used in ruby code.
    * @param hex int array
    * @return String for use in ruby
    */
    static public String rubyString(int[] hex){
        StringBuilder result = new StringBuilder("%w(");
        for (int i = 0; i < hex.length; i++ ){
            result.append(String.format("#%06X", (0xFFFFFF & hex[i])));
            if (i < hex.length - 1){
                result.append(' ');
            }
        }
        result.append(")\n");
        return result.toString();
    }

    /**
     *
     * @param hex double
     * @return hex float
     */
    static public float colorLong(double hex) {
        return (float) hex;
    }
    
    /**
     *
     * @param hexlong long
     * @return hexlong int
     */
    static public int colorLong(long hexlong){
       return hexLong(hexlong);
    }

    /**
     *
     * @param hex double
     * @return hex float
     */
    static public float colorDouble(double hex){
       return (float)hex;
    }
}