import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

/**
* This class is intended to help you convert from a standard format (either
* JPEG or PNG into the image format that I use with the ImageEditor.  It uses
* calls of functions in the ImageEditor so when you run it you will have to
* make sure one of the assignment jar files is in your classpath.  Unfortunately
* it also uses libraries that Together doesn't know about.  On the Janus
* machines you can compile it and execute it with the following commands.
*
* javac -classpath /users/mlewis/Local/HTML-Documents/CSCI1321-S03/Assn3/PAD2Assn3.jar:. Converter.java
*
* java -classpath /users/mlewis/Local/HTML-Documents/CSCI1321-S03/Assn3/PAD2Assn3.jar:. Converter [args]
*
* See the comments on main for what list of arguments you need to supply.
*
*/
public class Converter {
	/**
	* This main is used to build a 2D array of images that are loaded from
	* file.  It requires a number of arguments that tell it how many elements
	* it should put in the array.  It then saves those images in the format
	* used by my image editor so that you can easily load them into your game.
	* The first two arguments are the output file name and the the number of
	* rows of images (length of the array for the first index).  For each row,
	* you will provide at least two arguments.  The first is the number of
	* columns in that row then that number of file names for the actual files
	* to import.
	*
	* For example, to read in one image only you could give the arguments
	* TreeBlock.pic 1 1 StaticImage.png
	*
	* To read in two rows, one with 2 images and one with 3 you could do
	* Ball.pic 2 2 Pop1.png Pop2.png 3 Bounce1.png Bounce2.png Bounce3.png
	*
	* These go in the place of [args] in the command line above.
	*/
	public static void main(String[] args) {
		int rows=Integer.parseInt(args[1]);
		BufferedImage[][] img=new BufferedImage[rows][];
		int curArg=2;
		try {
			for(int i=0; i<rows; i++) {
				int cols=Integer.parseInt(args[curArg]);
				curArg++;
				img[i]=new BufferedImage[cols];
				for(int j=0; j<cols; j++) {
					img[i][j]=ImageIO.read(new File(args[curArg]));
					curArg++;
				}
			}
			ImageEditor.writeImageArray2D(img,args[0]);
		} catch(IOException e) {
			System.err.println("There was an error in the I/O either reading or writing the files.");
			e.printStackTrace();
		}
	}
}