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

// 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 
import java.io.File;

public class Lect1025d
{
  
  public static void main (String[] args) 
  {
    // Access and open the first picture
    String filename = FileChooser.pickAFile ();
    System.out.println (filename);
    int pos = filename.lastIndexOf (File.separatorChar);
    String temp1 = filename.substring(0, pos+1);
    System.out.println (temp1);
    
    String name1 = temp1 + "flower1.jpg";
    String name2 = temp1 + "flower2.jpg";
    System.out.println (name1);
    System.out.println (name2);
    
    
    Picture p = new Picture (name1);
    
    // Access and open the second picture
    Picture p2 = new Picture (name2);
    
    // call the method to modify the Pictture
    Picture p3;
    p3 = modifyPicture (p, p2);
    
    Picture p4;
    p4 = modifyPicture (p3, p);
    
    // explore (display) the picture
    p4.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 = width1 + width2;
    int height3;
    if ( height1 > height2 )
    {
      height3 = height1;
    }
    else
    {
      height3 = height2;
    }
    
    // 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 xNew;
    int yNew;
    Pixel pix1;
    Pixel pix2; 
    Pixel pix3;
    int red;
    int green;
    int blue;
    
    for ( xPos = 0 ; xPos < width1 ; ++xPos )
    {
      for ( yPos = 0 ; yPos < height1 ; ++yPos )
      { 
        //  access the pixel to be modifed
        pix1 = p1.getPixel (xPos, yPos);
        xNew = xPos;
        yNew = yPos + (height3 - height1);
        pix3 = resultPicture.getPixel (xNew, yNew);
        
        // get the colr values from the original pixel
        red = pix1.getRed();
        green = pix1.getGreen();
        blue = pix1.getBlue();
        
        // set those color values into the result pixel
        pix3.setRed(red);
        pix3.setGreen(green);
        pix3.setBlue(blue);
      }
    }
    
    for ( xPos = 0 ; xPos < width2 ; ++xPos )
    {
      for ( yPos = 0 ; yPos < height2 ; ++yPos )
      { 
        //  access the pixel to be modifed
        pix2 = p2.getPixel (xPos, yPos);
        xNew = xPos + width1;
        yNew = yPos + (height3 - height2);
        pix3 = resultPicture.getPixel (xNew, yNew);
        
        // get the colr values from the original pixel
        red = pix2.getRed();
        green = pix2.getGreen();
        blue = pix2.getBlue();
        
        // set those color values into the result pixel
        pix3.setRed(red);
        pix3.setGreen(green);
        pix3.setBlue(blue);
      }
    }
    
    return resultPicture;
  }  // end of modifyPicture
  
} // end of  class