/**
 * Simulates a single game of volleyball using rally scoring.
 *   @author Dave Reed
 *   @version 8/25/08
 *
 */
public class VolleyballSimulator {
    
    private Die roller;	// Die for simulating points
    private int ranking1;	// power ranking of team 1
    private int ranking2;	// power ranking of team 2

    /**
     * Constructs a volleyball game simulator.
     *   @param team1Ranking the power ranking (0-100) of team 1, the team that serves first
     *   @param team2Ranking the power ranking (0-100) of team 2, the receiving team
     */
    public VolleyballSimulator(int team1Ranking, int team2Ranking) {
        this.roller = new Die(team1Ranking+team2Ranking);
        this.ranking1 = team1Ranking;
        this.ranking2 = team2Ranking;
	}

    /**
     * Simulates a single rally between the two teams.
     *   @return the winner of the rally (either "team 1" or "team 2")
     */
    public String playRally() {
        if (this.roller.roll() <= this.ranking1) {
            return "team 1";
        }
        else {
            return "team 2";
        }
    }
    
    /**
     * Simulates an entire game using the rally scoring system.
     *   @param winningPoints the number of points needed to win the game (winningPoints > 0)
     *   @return the winner of the game (either "team 1" or "team 2")
     */
    public String playGame(int winningPoints) {
        int score1 = 0;
        int score2 = 0;
        String winner = "";       
	    
        while ((score1 < winningPoints && score2 < winningPoints) 
               || (Math.abs(score1 - score2) <= 1)) {
            winner = playRally();
            if (winner.equals("team 1")) {
                score1++;
            }
            else {
                score2++;
            }
	        
            // System.out.println(winner + " wins the point (" + score1 + "-" + score2 + ")");
        }
        return winner;
    }
}