public class pssEngine
{
	
	private final String[] strWeapons = {"Paper","Stone","Scissors"};
	
	private int wins = 0, loses = 0, draws = 0, cpuWeapon = 0;
	
	
	public void pssEngine ()
	{
	}
	
	public String play (int playerWeapon)
	{
		
		cpuWeapon = getRandomNumber();
		String strDisplay = strWeapons[playerWeapon] + " ";
		
		if (playerWeapon == cpuWeapon)
		{			
			strDisplay += "draws";			
		}
		else if (playerWeapon == 0) //Paper
		{
			
			if (cpuWeapon == 1) //Stone
			{
				strDisplay += "covers";
			}
			else //Scissors
			{
				strDisplay += "is cut by";
			}
			
		}
		else if (playerWeapon == 1) //Stone
		{
			
			if (cpuWeapon == 0) //paper
			{
				strDisplay += "is covered by";
			}
			else //Scissors
			{
				strDisplay += "breaks";
			}
			
		}
		else //Scissors
		{
			
			if (cpuWeapon == 0) //Paper
			{
				strDisplay += "cuts";
			}
			else //Stone
			{
				strDisplay += "is broken by";
			}
			
		}
		
		updateResults(playerWeapon);
		
		strDisplay += " " + strWeapons[cpuWeapon];
		return strDisplay;
				
		
	}
	
	private int getRandomNumber ()
	{		
		return (1 + (int) (Math.random() * 3)) - 1;
	}
	
	private void updateResults (int playerWeapon)
	{
		
		
		
		int[] paperGrid = {0,1,-1};
		int[] stoneGrid = {-1,0,1};
		int[] scissorGrid = {1,-1,0};
		int[][] pssGrid = {paperGrid, stoneGrid, scissorGrid};
		int result = pssGrid[playerWeapon][cpuWeapon];
		
		if (result == 0)
		{
			draws++;
		}
		else if (result == -1)
		{
			loses++;
		}
		else
		{
			wins++;
		}
		
	}		
	
	public void reset ()
	{		
		wins = loses = draws = cpuWeapon = 0;		
	}
	
	public String[] getWeapon ()
	{
		return strWeapons;
	}
	
	public String getWeapon (int index)
	{
		return strWeapons[index];
	}
	
	public String getStrCPUWeapon ()
	{
		return strWeapons[cpuWeapon];		
	}
	
	public int getCPUWeapon ()
	{
		return cpuWeapon;
	}
	
	public int getWins ()
	{
		return wins;
	}
	
	public int getLoses ()
	{
		return loses;
	}
	
	public int getDraws ()
	{
		return draws;
	}
	
}