public class LeagueTestProgram {
    
    // Displays a league's teams to the system console
    public static void displayTeams(League aLeague) {
        for (int i=0; i<aLeague.teams.length; i++)
            System.out.println(aLeague.teams[i]);
    }
    
    // Record a win and a loss between the given Teams
    public static void recordWinAndLoss(Team winner, Team loser) {
        if ((winner != null) && (loser != null)) {
            winner.wins++;
            loser.losses++;
        }
    }
    
    // Record a tie between the given Teams
    public static void recordTie(Team teamA, Team teamB) {
        if ((teamA != null) && (teamB != null)) {
            teamA.ties++;
            teamB.ties++; 
        }
    } 
    
    // Record a win and a loss between the teams in the League with the given names  
    public static void recordWinAndLoss(League aLeague, String nmW, String nmL) {
        recordWinAndLoss(teamWithName(aLeague, nmW), teamWithName(aLeague, nmL));
    }
    
    // Record a tie between the teams in the League with the given names
    public static void recordTie(League aLeague, String nameA, String nameB) {
        recordTie(teamWithName(aLeague, nameA), teamWithName(aLeague, nameB));
    } 
    
    // Find a Team with the given name in the given League
    public static Team teamWithName(League aLeague, String nameToLookFor) {
        for (int i=0; i<aLeague.teams.length; i++) {
            if (aLeague.teams[i].name.equals(nameToLookFor)) 
                return aLeague.teams[i];
        }
        return null;
    }
    
    // Determine the number of games played by the given team
    public static int gamesPlayed(Team t) {
        return (t.wins + t.losses + t.ties);
    }
    
    // Determine the number of points that the given team has
    public static int totalPoints(Team t) {
        return (t.wins * 2 + t.ties);
    }
    
    // Determine the total number of games played in the league
    public static int totalGamesPlayed(League aLeague) {
        int  total = 0;
        
        for (int i=0; i<aLeague.teams.length; i++)
            total += gamesPlayed(aLeague.teams[i]);
        
        return total/2;  // Divide by two since a game is counted by both teams
    }
    
    // Return the team that has the most points 
    public static Team firstPlaceTeam(League aLeague) { 
        Team    teamWithMostPoints = aLeague.teams[0]; 
        
        if (aLeague.teams[0] == null)
            return null;
        
        for (int i=0; i<aLeague.teams.length; i++) {
            if (totalPoints(aLeague.teams[i]) > totalPoints(teamWithMostPoints))
                teamWithMostPoints = aLeague.teams[i];
        }
        return teamWithMostPoints; 
    }
    
    // Return the team that has the least points 
    public static Team lastPlaceTeam(League aLeague) { 
        Team    teamWithLeastPoints = aLeague.teams[0]; 
        
        if (aLeague.teams[0] == null)
            return null;
        
        for (int i=0; i<aLeague.teams.length; i++) {
            if (totalPoints(aLeague.teams[i]) < totalPoints(teamWithLeastPoints))
                teamWithLeastPoints = aLeague.teams[i];
        }
        return teamWithLeastPoints; 
    }
    
    public static void main(String args[]) {
        League  nhl;
        
        nhl = new League("NHL");
        
        //Add a pile of teams to the league 
        nhl.teams[0] = new Team("Ottawa Senators"); 
        nhl.teams[1] = new Team("Montreal Canadians"); 
        nhl.teams[2] = new Team("Toronto Maple Leafs"); 
        nhl.teams[3] = new Team("Vancouver Canucks"); 
        nhl.teams[4] = new Team("Edmonton Oilers"); 
        nhl.teams[5] = new Team("Washington Capitals"); 
        nhl.teams[6] = new Team("New Jersey Devils"); 
        nhl.teams[7] = new Team("Detroit Red Wings");
        
        // Now we will record some games 
        recordWinAndLoss(nhl, "Ottawa Senators", "New Jersey Devils"); 
        recordWinAndLoss(nhl, "Edmonton Oilers", "Montreal Canadians"); 
        recordTie(nhl, "Ottawa Senators", "Detroit Red Wings"); 
        recordWinAndLoss(nhl, "Montreal Canadians", "Washington Capitals"); 
        recordWinAndLoss(nhl, "Ottawa Senators", "Edmonton Oilers"); 
        recordTie(nhl, "Washington Capitals", "Edmonton Oilers"); 
        recordTie(nhl, "Detroit Red Wings", "New Jersey Devils"); 
        recordWinAndLoss(nhl, "Vancouver Canucks", "Toronto Maple Leafs"); 
        recordWinAndLoss(nhl, "Toronto Maple Leafs", "Edmonton Oilers"); 
        recordWinAndLoss(nhl, "New Jersey Devils", "Detroit Red Wings");
        
        // This one will not work
        recordWinAndLoss(nhl, "Mark's Team", "Detroit Red Wings"); 
        
        // Now display the teams again 
        System.out.println("\nHere are the teams after recording the " + 
                           "wins, losses and ties:\n"); 
        displayTeams(nhl);
        
        // Here are some statistics 
        System.out.println("\nThe total number of games played is " + 
                           totalGamesPlayed(nhl)); 
        System.out.println("The first place team is " + 
                           firstPlaceTeam(nhl)); 
        System.out.println("The last place team is " + 
                           lastPlaceTeam(nhl));  
    } 
}