/* RedGreenBlue
 * <Description>
 * Converts image to greyscale and red,green,blue variants
 * <Usage>
 * % javac RedGreenBlue.java Luminance.java Picture.java
 *
 * % java RedGreenBlue mandrill.jpg
 * //YIELDS 4 different picture objects
 * 
 * <References>
 * http://introcs.cs.princeton.edu/java/31datatype/Luminance.java
 * http://introcs.cs.princeton.edu/java/31datatype/Picture.java
 * http://programmersheaven.com/discussion/360618/how-to-make-java-wait
 * @author
 * Dan Latham
 * <l3li3l@torguard.tg>
 *
 * @version 0.0.1
 *
 */
public class RedGreenBlue
{
	public static void wait (int n)
	{
		long t0,t1;
		t0 = System.currentTimeMillis();
		do
		{
			t1=System.currentTimeMillis();
		}
		while (t1-t0<1000);
	}
	public static Picture redscale(Picture picture)
	{
		int y0 = picture.height();
		int x0 = picture.width();
		for (int x = 0; x < x0; x+=1)
		{
			for (int y = 0; y < y0; y+=1)
			{
				java.awt.Color initcolor = picture.get(x,y);
				int r = 255;
				int b = initcolor.getBlue();
				int g = initcolor.getGreen();
				
				java.awt.Color newcolor = new java.awt.Color(r,g,b);
				picture.set(x, y, newcolor);
			}
		}
		return picture;
	}
	public static Picture greenscale(Picture picture)
	{
		int y0 = picture.height();
		int x0 = picture.width();
		for (int x = 0; x < x0; x+=1)
		{
			for (int y = 0; y < y0; y+=1)
			{
				java.awt.Color initcolor = picture.get(x,y);
				int r = initcolor.getRed();
				int b = initcolor.getBlue();
				int g = 255;
				
				java.awt.Color newcolor = new java.awt.Color(r,g,b);
				picture.set(x, y, newcolor);
			}
		}
		return picture;
	}
	public static Picture bluescale(Picture picture)
	{
		int y0 = picture.height();
		int x0 = picture.width();
		for (int x = 0; x < x0; x+=1)
		{
			for (int y = 0; y < y0; y+=1)
			{
				java.awt.Color initcolor = picture.get(x,y);
				int r = initcolor.getRed();
				int b = 255;
				int g = initcolor.getGreen();
				
				java.awt.Color newcolor = new java.awt.Color(r,g,b);
				picture.set(x, y, newcolor);
			}
		}
		return picture;
	}
	public static Picture grayscale(Picture picture)
	{
		int y0 = picture.height();
		int x0 = picture.width();
		//get color of each pixel, convert to grayscale, set color to gray
		for (int x = 0; x < x0; x+=1)
		{
			for (int y = 0; y < y0; y+=1)
			{
				java.awt.Color initcolor = picture.get(x,y);
				java.awt.Color graycolor = Luminance.toGray(initcolor);
				int r = graycolor.getRed();
				int b = graycolor.getBlue();
				int g = graycolor.getGreen();
				
				java.awt.Color newcolor = new java.awt.Color(r,g,b);
				picture.set(x, y, newcolor);
			}
		}
		return picture;
	}
	
	
	public static void main(String[] args)
	{
		String pic = args[0]; //Path to PICTURE
		Picture picture = new Picture(pic); //Create new Picture object
		//picture.show();
		picture = grayscale(picture); //iterates over all pixels in file, shows resulting image
		picture.show();
		wait(0);
		Picture redpicture = new Picture(picture);
		Picture greenpicture = new Picture(picture);
		Picture bluepicture = new Picture(picture);
		redpicture = redscale(redpicture);
		redpicture.show();
		wait(0);
		
		greenpicture = greenscale(greenpicture);
		greenpicture.show();
		wait(0);
		
		bluepicture = bluescale(bluepicture);
		bluepicture.show();
		wait(0);
	}
}