class WrongNumberOfPlayersError < StandardError ; end
class NoSuchStrategyError < StandardError ; end

def rps_result(m1, m2)
  p1 = m1[1].upcase
  p2 = m2[1].upcase
  case p1
  when 'R'
    if p2 == 'S'
        m1
    else if p2 == 'R'
        m1
    else
      m2
    end
    end
  when 'S'
    if p2 == 'S'
        m1
    else if p2 == 'R'
        m2
    else
      m1
    end
    end
   when 'P'
     if p2 == 'S'
        m2
    else if p2 == 'R'
        m1
    else
      m1
      end
    end
   end


end

def rps_game_winner(game)
 valid_strategies = ['R','P','S']
 raise WrongNumberOfPlayersError unless game.length == 2

 raise NoSuchStrategyError unless valid_strategies.include? game[0][1].upcase
 raise NoSuchStrategyError unless valid_strategies.include? game[1][1].upcase
 rps_result(game[0],game[1])
end

def rps_tournament_winner(tournament)

  qualifying_round_winners = []
   round_winners = []
  # last round

  if tournament.length < 1
    return
  end

  tournament.each_with_index do |round,i|
 puts round.inspect
     qualifying_round_winners[i] = []
     round_winners = []
     round.each_with_index do |game,j|

         winner = rps_game_winner(game)
         round_winners.push winner
     end
     qualifying_round_winners[i] = round_winners

  end


  rps_tournament_winner(qualifying_round_winners)
end



game = [ ["Armando", "r"], ["Dave", "r"]]
tournament = [
    [
        [
            ["Armando", "P"], ["Dave", "S"]
        ],
        [
            ["Richard", "R"],  ["Michael", "S"]

        ],
    ],
    [
        [ ["Allen", "S"], ["Omer", "P"] ],
        [ ["David E.", "R"], ["Richard X.", "P"] ]
    ]
]

 rps_tournament_winner tournament