/*
  
  Author:  James Tam
  
  Version: April 1, 2013
  
  
  Features:
  * Stores and tracks all information associated with a racetrack.



*/



public class Track

{
    
    public static final int SIZE = 25;

    
    private Car [] aTrack;


    // Create the track and initialize all elements to sensible default values.
    
    public Track()
    
    {
	
        int c;
	
        aTrack = new Car[SIZE];
	
        for (c = 0; c < SIZE; c++)
	    
            aTrack[c] = null;
    
    }

    // Displays the track with a numbered grid around element element.
    

    // Columns 10 and greater are labeled with capital letters of the alphabet
    
    public void display()
    
    {
	
        int c;
	
        final int FIRST_CAPITAL = 65;     // ASCII value for 'A' = 65
	
        int temp_code;
	char temp_char;
   // Labels for the columns
	
        for (c = 0; c < SIZE; c++)
	
        {

	    if (c < 9)
		
                System.out.print(" " + (c+1));
	    // Display letters for values >= 10, A = 10, B = 11 etc.
	    
                                                    // ASCII 'A' = 65, 'B' = 66
	    
            else
	    
            {
	 
                 // Determine ASCII code of label
		
                 temp_code = FIRST_CAPITAL + (c - 9);

		// Convert ASCII code to a charcter and display
		
                 temp_char = (char) temp_code;
		
                 System.out.print(" " + temp_char);
	    
            }	
	
        }
	
        System.out.println();


	// Row of dashes before the elements of the track
	
        for (c = 0; c < SIZE; c++)
	
        {
	    
            System.out.print(" -");
	
        }
	
        System.out.println();
	
	// Display each track element bound left and right by vertical bar.
	
        for (c = 0; c < SIZE; c++)
	
        {
	    
            if (aTrack[c] != null)
	    
            {
		
               // Each element is preceeded by a vertical bar.
		
               System.out.print('|');
		// Display element element.
		
               System.out.print(aTrack[c]);
	    
            }
 
	    else

		System.out.print("| ");
	
        } 
	
        // Closing bar at end of row (follows last element)
	
        System.out.println('|');

	// Row of dashes after the elements of the track
	
        for (c = 0; c < SIZE; c++)

	{

	    System.out.print(" -");

	}

	System.out.println();


    }

    

    public Car []  getTrack ()

    {

	return aTrack;

    }

    // Used place a car object at a particular index in the track, useful for 
    
        // child classes that needs to place the two cars at the starting location.
   

    protected void setLocation(Car aCar, int index)

    {

	if ((index >= 0) && (index < Track.SIZE))

	    aTrack[index] = aCar;

	else

	{

	    if ((index < 0) || (index >= Track.SIZE))

		System.out.println("Placing car out of bounds of track 0-" + Track.SIZE);
	 }
    
    }

    // The whole track is empty except for a single car so if a car reaches the 
    
    
   // final column then the simulation is 'won' for this track.

    public boolean isWon()

    {

	if (aTrack[SIZE-1] != null)

	    return true;

	else

	    return false;

    }

}