import java.util.*;
import java.io.*;

/**
 * <p>
 * This facade class is used to run the homework assignments. This is a console
 * application that accepts the name of the problem as a command line parameter
 * along with the problem-specific parameters.
 * </p>
 * 
 * <p>
 * Example of usage:
 * 
 * <pre>
 *  java CPS170HW1 15 15.txt
 * </pre>
 * 
 * Will run the A* algorithm for the 15 puzzle, reading the initial state from
 * the file "15.txt".
 * 
 * <pre>
 *  java CPS170HW1 Superqueens 4
 * </pre>
 * 
 * Will run the A* algorithm for the Superqueens puzzle with 4 superqueens on a
 * 4x4 board.
 * </p>
 * 
 */
public class CPS170HW1 {
    
    /**
     * This is the entry point to this application. See the class description
     * for usage.
     * 
     * @param args -
     *            command line arguments.
     * @throws IOException
     * @throws NumberFormatException
     */
    public static void main(String[] args) throws IOException,
            NumberFormatException {
        
        if (args.length < 1) {
            System.out
                    .println("Please specify the name of the problem to solve.");
            return;
        }
        
        if (args[0].equals("15")) {
            if (args.length < 2) {
                System.out.println("Please specify the input file name.");
                return;
            }
            String filename = args[1];
            AStar.run(FifteensNode.parseFromFile(filename));
            
        } else if (args[0].equals("Superqueens")) {
            if (args.length < 2) {
                System.out.println("Please specify the number of queens.");
                return;
            }
            int nQueens = Integer.parseInt(args[1]);
            AStar.run(SuperqueensNode.createRootNode(nQueens));
            
        } else {
            System.out.println("Unknown problem name: " + args[0]);
        }
    }
}