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

    public class Array2DDriver
   {
       public static void main(String args[])
      {
         File 		matrixFile;
         Scanner 	matrixScan;
         Scanner 	lineScan;
         String 	line;
         int 		rows, cols;
         double 	result;
      
         double [][] matrix;
      
         matrixScan = null; // make compiler happy
      	
      // first check to see if there is a file
         if(args.length == 0)
         {
            System.out.println("Please enter a file name next time.  Ending");
            System.exit(1);
         }
         else
         {
            matrixFile = new File(args[0]);
         
         // check to see if the file actually exists
            if (!matrixFile.exists())
            {
               System.out.println("Your file " + args[0] + " does not exist.  Ending");
               System.exit(2);
            }
            else	
            {
               try // opening the file
               {
                  matrixScan = new Scanner(matrixFile);
               }
                   catch (IOException ioe)
                  {
                     ioe.printStackTrace();
                     System.out.println("Your file " + args[0] + " could not be opened.  Ending");
                     System.exit(3);
                  }
            }
         }
         // If we are here, we have a valid file.  
         // First line of the file contains 2 integers determining
         // the size of the matrix
         line = matrixScan.nextLine();
         lineScan = new Scanner(line);
         lineScan.useDelimiter(",");
         
         rows = lineScan.nextInt();
         cols = lineScan.nextInt();
         
         // establish matric size
         matrix = new double [rows][cols];
         
         // fill the matrix
         for (int ii = 0; ii < matrix.length; ii++)
         {
            // each row is a new line from the file
            line = matrixScan.nextLine();
            lineScan = new Scanner(line);
            lineScan.useDelimiter(",");
         
            
            for (int jj = 0; jj < matrix[ii].length; jj++)
            {
               matrix[ii][jj] = lineScan.nextDouble();
            }
         }
         
         // We now have a full matrix of values.  Now for the tests
         
         System.out.println("Testing getTotal");
            
         result = Array2D.getTotal(matrix); 
         System.out.println("The total of the 2D array is: " + 
                  result);
            
         System.out.println("\nTesting getAverage");
            
         result = Array2D.getAverage(matrix);
         System.out.println("The average of the 2D array is: " + 
                  result);
      
         for (int ii = 1; ii < 4; ii++)
         {
            
            System.out.println("\nTesting getRowTotal for row " + ii);
            
            result = Array2D.getRowTotal(matrix, ii);
            System.out.println("The total of the 2D array row " + ii + " is: " + 
                  result);
          
            System.out.println("\nTesting getColumnTotal for column " + ii);
            
            result = Array2D.getColumnTotal(matrix, ii);
            System.out.println("The total of the 2D array column " + ii + " is: " + 
                  result);
            
            System.out.println("\nTesting getHighestInRow " + ii);
            
            result = Array2D.getHighestInRow(matrix, ii);
            System.out.println("The highest value in the 2D array row " + ii + " is: " + 
                  result);
            
            System.out.println("\nTesting getLowestInRow " + ii);
            
            result = Array2D.getLowestInRow(matrix, ii);
            System.out.println("The lowest value in the 2D array row " + ii + " is: " + 
                  result);
            
         }
         System.out.println("\nProgram has completed normally");
      }
   }