/**
 * Simple Picture manipulation
 * 
 * @author Pat Troy: troy AT uic DOT edu
 */

import java.awt.Color;

// Note the name of the class in the following line MUST
// match the name of the file.  This is stored in a file
// named: Template.java 
public class Lect1027d
{
  
  public static void main (String[] args) 
  {
    // Access and open the first picture
    String filename = FileChooser.pickAFile ();
    Picture p = new Picture (filename);
    
    // Access and open the second picture
    String filename2 = FileChooser.pickAFile ();
    Picture p2 = new Picture (filename2);
    
    // call the method to modify the Pictture
    Picture p3;
    p3 = modifyPicture (p, p2);
    
    // explore (display) the picture
    p3.explore();
    
    // get a new filename and save the picture
    //String saveFilename = FileChooser.pickAFile ();
    //p2.write (saveFilename);

  }  // end of main
  
  public static Picture modifyPicture (Picture p1, Picture p2)
  {
    // get the width and height of the picture
    int width1 = p1.getWidth();
    int height1 = p1.getHeight();
    System.out.println ("Width: " + width1 + ", Height: " + height1);
    
    // get the width and height of the picture
    int width2 = p2.getWidth();
    int height2 = p2.getHeight();
    System.out.println ("Width: " + width2 + ", Height: " + height2);
    
    // determine the width and height of the result
    int width3 = width2;
    int height3 = width2;
    
    // create the new Picture that will be returned
    Picture resultPicture;
    resultPicture = new Picture (width3, height3);
    
    // Set up a loop to access all the X position
    int xPos;
    int yPos;
    int yStart;
    int yEnd;
    int temp;
    Pixel pix1;
    Pixel pix2; 
    Pixel pix3;
    Pixel fromPix;
    Pixel toPix;
    int red;
    int green;
    int blue;
    Color c1 = new Color (18, 155, 51);
    
    for ( xPos = 0 ; xPos < width2 ; ++xPos )
    {
      
      for ( yPos = 0 ; yPos < height2 ; ++yPos )
      { 
        if ( xPos >= width1 || yPos >= height1 )
        {
          fromPix = p2.getPixel (xPos, yPos);
        }
        else
        {
          //  access the pixel to be modifed
          pix1 = p1.getPixel (xPos, yPos);
          if ( Pixel.colorDistance (c1, pix1.getColor()) < 10)
          {
            fromPix = p2.getPixel (xPos, yPos);
          }
          else
          {
            fromPix = p1.getPixel (xPos, yPos);
          }
        } 
        
        toPix = resultPicture.getPixel (xPos, yPos);
        
        // get the colr values from the original pixel
        red = fromPix.getRed();
        green = fromPix.getGreen();
        blue = fromPix.getBlue();
        
        // set those color values into the result pixel
        toPix.setRed(red);
        toPix.setGreen(green);
        toPix.setBlue(blue);
      }
    }
    
    return resultPicture;
  }  // end of modifyPicture
  
} // end of  class