import java.util.ArrayList;

public class League {
    private String 			name;
    private ArrayList<Team> 	teams;

    public League(String n) {
        this.name = n;
        this.teams = new ArrayList<Team>(); // Doesn’t make any Team objects
    }

    // This specifies the appearance of the League
    public String toString() {
        return ("The " + this.name + " league");
    }

    // Add the given team to the League
    public void addTeam(Team t) {
    	teams.add(t);
    }

    // List all of the teams in the League
    public void showTeams() {
	   for (Team t:  teams) {
	      System.out.println(t);
	   }
	}

	// Record a win and a loss in the league
	public void recordWinAndLoss(Team winner, Team loser) {
	    if ((winner != null) && (loser != null)) {
	        winner.recordWin();
	        loser.recordLoss();
	    }
	}

	// Record a tie in the league
	public void recordTie(Team teamA, Team teamB) {
	    if ((teamA != null) && (teamB != null)) {
	        teamA.recordTie();
	        teamB.recordTie();
	    }
	}

	// Find the team with the given name
	private Team teamWithName(String nameToLookFor) {
	    for (Team t: teams)
	        if (t.getName().equals(nameToLookFor))
	            return t;
		return null;
	}

	// Record a win and a loss in the league based on team names
	public void recordWinAndLoss(String winnerName, String loserName) {
	   this.recordWinAndLoss(this.teamWithName(winnerName), this.teamWithName(loserName));
	}

	// Record a tie in the league based on team names
	public void recordTie(String teamAName, String teamBName) {
	   this.recordTie(this.teamWithName(teamAName), this.teamWithName(teamBName));
	}

	// Find the total number of games played in the league
	public int totalGamesPlayed() {
	    int  total = 0;
	    for (Team t: teams)
	        total += t.gamesPlayed();

	    return total/2;
	}

	// Return the first place team
	public Team firstPlaceTeam() {
	    Team  teamWithMostPoints;

	    if (teams.size() == 0)
	        return null;

	    teamWithMostPoints = teams.get(0);
	    for (Team t: teams) {
	        if (t.totalPoints() > teamWithMostPoints.totalPoints())
	            teamWithMostPoints = t;
	    }
	    return teamWithMostPoints;
	}

	// Return the last place team
	public Team lastPlaceTeam() {
	    Team  teamWithMostPoints;

	    if (teams.size() == 0)
	        return null;

	    teamWithMostPoints = teams.get(0);
	    for (Team t: teams) {
	        if (t.totalPoints() < teamWithMostPoints.totalPoints())
	            teamWithMostPoints = t;
	    }
	    return teamWithMostPoints;
	}

	// Return a list of all undefeated teams
	public ArrayList<Team> undefeatedTeams() {
	   ArrayList<Team>  undefeated = new ArrayList<Team>();

	    for (Team t: teams) {
	        if (t.getLosses() == 0)
			undefeated.add(t);
	    }
	    return undefeated;
	}

	// Remove all teams that have not won any games
	public void removeLosingTeams() {
	   for (int i=0; i<teams.size(); i++) {
	      Team t = teams.get(i);
	      if (t.getWins() == 0) {
	         teams.remove(t);
	         i--;
	      }
	   }
	}



}