distributed_system_coursework/lib/server.ex

defmodule ServerMacros do

  def create_create_loop(name, do: match_exp, else: process_exp) do
    function_name = :"#{name}_loop"

    ast1 = quote do
      {:timeout} -> :timeout
    end
    ast2 = quote do
      value ->
        # TODO check spelling
        log("Disreguarding: #{inspect(value)}")
        # Process.send_after(self(), value, t + 2000)
        unquote(function_name)(v, t)
    end

    ast3 = ast1 ++ match_exp ++ ast2

    quote do
      defp unquote(function_name)(v, t) do
        var!(v) = v
        unquote(process_exp)
        receive do
          unquote(ast3)
        after
          t -> :timeout
        end
      end
    end
  end

  def create_create_loop(name, do: exp, else: else_exp) do
    create_create_loop(name, do: exp, else: else_exp)
  end

  def create_create_loop(name, do: exp) do
    create_create_loop(name, do: exp, else: nil)
  end

  defmacro create_loop(name, clauses) do
  	create_create_loop(name, clauses)
  end

  defmacro try_propose(val, do: ready, else: recal_do) do
    ast1 = quote do
      {:timeout} ->  unquote(recal_do)
      {:abort} ->   unquote(recal_do)
    end
    ast2 = quote do
      {:decision, v} ->
        var!(state) = apply_game(var!(state), v)
        unquote(recal_do)

      v ->
        raise "Unknown message on try_propose #{inspect(v)}"
    end

    ast3 = ast1 ++ ready ++ ast2

    quote do
      v = Paxos.propose(var!(state).paxos, var!(state).instance, unquote(val), 1000)
      case v do
        unquote(ast3)
      end
    end
  end

end

defmodule Server do
  require ServerMacros
  import ServerMacros
  require Utils
  import Utils

  create_log 2

  def start(name, participants) do
    log("starting server")

    pid = spawn(Server, :init, [name, participants])
    register_name(name, pid, false)
  end

  def init(name, participants) do
    paxos = Paxos.start(alter_name(name, "_paxos"), Enum.map(participants, fn name -> alter_name(name, "_paxos") end), true)
    state = %{
      name: name,
      procs: participants,
      games: %{},
      paxos: paxos,
      instance: 0,
    }

    run(state)
  end

  runfn do
    {:start_game, participants, pid_to_inform} ->
      or_state is_list(participants) do
        {state, game_id} = try_to_create_game(state, participants)
        state = set_modifed(state, game_id)
        safecast(pid_to_inform, {:start_game_ans, game_id})
        state
      end

    {:get_game_state, game_id, pid_to_inform} ->
      state = get_game_state(state, game_id, pid_to_inform)
      set_modifed(state, game_id)


    {:make_move, game_id, move, pid_to_inform} ->
      try_to_play_checks(state, game_id, move, pid_to_inform)

  end

  defp try_to_play_checks(state, game_id, move, pid_to_inform, repeat \\ false) do
    cond do
      state.games[game_id] == :not_playing_in_game ->
        safecast(pid_to_inform, {:make_move, game_id, :not_playing})
        state

      state.games[game_id] == nil ->
        if repeat do
          safecast(pid_to_inform, {:make_move, game_id, :game_does_not_exist})
          state
        else
          state = qurey_status(state)
          try_to_play_checks(state, game_id, move, pid_to_inform, true)
        end 

      true ->
        state = qurey_status(state)
        game = state.games[game_id]
        cond do
          is_finished(state, game_id) ->
            {_, score} = state.games[game_id]
            safecast(pid_to_inform, {:make_move, game_id, :game_finished, score})
            state
          game.modified ->
            safecast(pid_to_inform, {:make_move, game_id, :player_moved_before, game.game_state, game.hand})
            set_modifed(state, game_id)
          true ->
            cond do
              not is_number(move) ->
                safecast(pid_to_inform, {:make_move, game_id, :invalid_move})
                state
              move >= length(game.game_state) ->
                safecast(pid_to_inform, {:make_move, game_id, :invalid_move})
                state
              true ->
                try_to_play(state, game_id, move, pid_to_inform)
            end
        end
    end
  end

  defp try_to_play(state, game_id, move, pid_to_inform) do
    name = state.name
    
    new_hand = if state.games[game_id].hand[state.name] == :- do
      Enum.at(state.games[game_id].game_state, move)
    else
      get_hand_for_game_state(state.games[game_id].game_state)
    end

    try_propose {:make_move, game_id, name, move, new_hand}
    do
      {:decision, {:make_move, ^game_id, ^name, ^move, ^new_hand}} ->
        state = apply_game(state, {:make_move, game_id, name, move, new_hand})

        if is_finished(state, game_id) do
          {_, score} = state.games[game_id]
          safecast(pid_to_inform, {:make_move, game_id, :game_finished, score})
        else
          game = state.games[game_id]
          safecast(pid_to_inform, {:make_move, game_id, game.game_state, game.hand[state.name]})
        end

        set_modifed(state, game_id)

      {:decision, {:make_move, ^game_id, new_name, new_move, new_new_hand}} ->
        state = apply_game(state, {:make_move, game_id, new_name, new_move, new_new_hand})

        if is_finished(state, game_id) do
          {_, score} = state.games[game_id]
          safecast(pid_to_inform, {:make_move, game_id, :game_finished, score})
        else
          game = state.games[game_id]
          safecast(pid_to_inform, {:make_move, game_id, :player_moved_before, game.game_state, game.hand})
        end

        set_modifed(state, game_id)
    else
      try_to_play(state, game_id, move, pid_to_inform)
    end
  end

  defp get_game_state(state, game_id, pid_to_inform, repeat \\ false) do
    cond do 
      state.games[game_id] == :not_playing_in_game ->
        safecast(pid_to_inform, {:game_state, game_id, :not_playing})
        state

      state.games[game_id] == nil ->
        if repeat do
          safecast(pid_to_inform, {:game_state, game_id, :game_does_not_exist})
          state
        else
          state = qurey_status(state)
          get_game_state(state, game_id, pid_to_inform, true)
        end

      true ->
        state = qurey_status(state)
        if is_finished(state, game_id) do
          {_, score} = state.games[game_id]
          safecast(pid_to_inform, {:game_state, game_id, :game_finished, score})
        else
          game = state.games[game_id]
          safecast(pid_to_inform, {:game_state, game_id, game.game_state, game.hand[state.name]})
        end
        state
    end
  end

  defp get_hand_for_game_state(game_state) do
    r1 = Enum.random(0..100)
    cond do 
      r1 <= 1 -> :b
      r1 <= 5 -> :-
      r1 <= 20 -> :+
      true ->
        mx = game_state |> Enum.filter(fn m -> m != :+ end) |> Enum.max()
        mn = max(mx - 20, 1)
        mx = max(mx - 2, 4)
        Enum.random(mn..mx)
    end 
  end

  defp try_to_create_game(state, participants) do
    game_ids = Map.keys(state.games)
    latest = Enum.at(Enum.sort(game_ids), length(game_ids) - 1)
    new_game_id = if latest do latest else 0 end + 1

    new_game_state = Enum.to_list(0..Enum.random(3..8)) |> Enum.map(fn _ -> Enum.random(1..4) end)
    hand = Enum.reduce(participants, %{}, fn p, acc -> Map.put(acc, p, get_hand_for_game_state(new_game_state)) end)

    try_propose {:start_game, new_game_id, participants, new_game_state, hand}
    do
      {:decision, {:start_game, ^new_game_id, ^participants, ^new_game_state, ^hand}} ->
        state = apply_game(state, {:start_game, new_game_id, participants, new_game_state, hand})
        {state, new_game_id}
    else
      try_to_create_game(state, participants)
    end
  end

  #
  # Utils
  #
  
  defp is_finished(state, game) do
    case state.games[game] do
      {:finished, _} -> true
      _ -> false
    end
  end

  defp qurey_status(state) do
    v = Paxos.get_decision(state.paxos, state.instance, 100)
    or_state v != nil do
      state = apply_game(state, v)
      qurey_status(state)
    end
  end

  defp set_modifed(state, game, val \\ false) do
    or_state not is_finished(state, game) and state.games[game] != :not_playing_in_game and state.games[game] != nil do
      %{state | games: Map.put(state.games, game, %{state.games[game] | modified: val})}
    end
  end

  #
  # Apply Game States
  #

  defp get_index(indexed_game_state, spos, index) do
    index = spos + index
    len = length(indexed_game_state)
    cond do
      index < 0 ->
        len - 1
      index >= len ->
        rem(index, len)
      true ->
        index 
    end
  end

  defp simplify_game_state_pluses([], indexed_game_state), do: {false, indexed_game_state}
  defp simplify_game_state_pluses([{:+, i} | tl], indexed_game_state) do
    before_i = get_index(indexed_game_state, i, -1)
    after_i = get_index(indexed_game_state, i, 1)

    if before_i != after_i do 
      {b, b_i} = Enum.at(indexed_game_state, before_i)
      {a, a_i} = Enum.at(indexed_game_state, after_i)

      if b == a do
        case b do
          :+ -> simplify_game_state_pluses(tl, indexed_game_state)
          :b -> simplify_game_state_pluses(tl, indexed_game_state)
          n ->
            list =
              indexed_game_state |>
              Enum.map(fn {x, ti} -> if ti == i, do: {{:merged, n + 1}, i}, else: {x, ti} end) |>
              Enum.filter(fn {x, ti} -> cond do
                  b_i == ti -> false
                  a_i == ti -> false
                  true -> true
                end
              end) |>
              reindex()
            {true, expand_merge(list)}
        end
      else
        simplify_game_state_pluses(tl, indexed_game_state)
      end
    else
        simplify_game_state_pluses(tl, indexed_game_state)
    end
  end

  defp simplify_game_state_pluses([{:b, i} | tl], indexed_game_state) do
    before_i = get_index(indexed_game_state, i, -1)
    after_i = get_index(indexed_game_state, i, 1)

    if before_i != after_i do 
      {b, b_i} = Enum.at(indexed_game_state, before_i)
      {a, a_i} = Enum.at(indexed_game_state, after_i)

      a = if is_atom(a) do 1 else a end
      b = if is_atom(b) do 1 else b end

      list =
        indexed_game_state |>
        Enum.map(fn {x, ti} -> if ti == i, do: {{:merged, trunc(:math.floor((a + b) / 2))}, i}, else: {x, ti} end) |>
        Enum.filter(fn {x, ti} -> cond do
            b_i == ti -> false
            a_i == ti -> false
            true -> true
          end
        end) |>
        reindex()
      {true, expand_merge(list)}
    else
        simplify_game_state_pluses(tl, indexed_game_state)
    end
  end

  defp is_merged(item) do
    case item do
      {:merged, _} -> true
      _ -> false
    end
  end

  defp expand_merge(indexed_game_state) do
    {{:merged, n}, i} = indexed_game_state |> Enum.find(fn {x, _} -> is_merged(x) end)

    b_i = get_index(indexed_game_state, i, - 1)
    a_i = get_index(indexed_game_state, i, + 1)

    if b_i != a_i do
      {b, b_i} = Enum.at(indexed_game_state, b_i)
      {a, a_i} = Enum.at(indexed_game_state, a_i)
      if a == b do
        case b do
          :+ -> indexed_game_state
          {:merged, _} -> indexed_game_state
          _ ->
            indexed_game_state |>
              Enum.map(fn {x, ti} -> if ti == i, do: {{:merged, max(n, a) + 1}, i}, else: {x, ti} end) |>
              Enum.filter(fn {x, ti} -> cond do
                  b_i == ti -> false
                  a_i == ti -> false
                  true -> true
                end
              end) |>
              reindex() |>
              expand_merge()
        end
      else
        indexed_game_state
      end
    else
      indexed_game_state
    end
  end

  defp reindex(list, flat \\ true) do
    list = if flat do
      list |> Enum.map(fn {n, _} -> n end)
    else
      list
    end

    [list, 0..(length(list) - 1)] |> Enum.zip()
  end

  defp remove_merged([], rec, _), do: rec

  defp remove_merged([{:merged, n} | tl], rec, add),
    do: if add, do: remove_merged(tl, rec ++ [n], false),
      else: remove_merged(tl, rec, false)

  defp remove_merged([n | tl], rec, add), do: 
    remove_merged(tl, rec ++ [n], add)

  defp remove_merged(list), do: remove_merged(list, [], true)

  defp simplify_game_state(game_state) do
    indexed_game_state = 
      game_state |>
      reindex(false)

    {repeat, indexed_game_state} =
      indexed_game_state |>
      Enum.filter(fn x -> case x do 
        {:+, _} -> true
        {:b, _} -> true
        _ -> false
        end
      end) |>
      simplify_game_state_pluses(indexed_game_state)

    if repeat do
      indexed_game_state |> 
        Enum.map(fn {v, _} -> v end) |>
        remove_merged() |>
        simplify_game_state()
    else
      indexed_game_state |> Enum.map(fn {v, _} -> v end)
    end
  end

  defp apply_game(state, {:make_move, game_id, player_name, pos_move, new_hand}) do
    game = state.games[game_id]
    case game do
      {:finished, _} ->
        raise "Game already finished"
      :not_playing_in_game ->
        %{state | instance: state.instance + 1 }
      game ->
        game_state = game.game_state
        game_state = if game.hand[player_name] == :- do
          List.delete_at(game_state, pos_move)
        else
          {b, e} = Enum.split(game_state, pos_move)
          b ++ [ game.hand[player_name] ] ++ e
        end
        game_state = simplify_game_state(game_state)
        hand = Map.put(game.hand, player_name, new_hand)
        game = %{game| hand: hand, game_state: game_state, modified: true }

        if length(game.game_state) > 16 do
          %{state| games: Map.put(state.games, game_id, {
            :finished, 
            game.game_state |> 
              Enum.filter(fn x -> not is_atom(x) end) |> 
              Enum.sum()}), instance: state.instance + 1
          }
        else
          %{state| games: Map.put(state.games, game_id, game), instance: state.instance + 1}
        end
    end
  end
  
  defp apply_game(state, {:start_game, game_id, participants, new_game_state, hand}) do
    cond do
      state.games[game_id] ->
        raise "Game Already Exists"
      state.name in participants ->
        %{state | 
          games: Map.put(state.games, game_id, %{
            game_state: new_game_state,
            participants: participants,
            hand: hand,
            modified: true,
          }),
          instance: state.instance + 1
        }
      true ->
        %{state | 
          games: Map.put(state.games, game_id, :not_playing_in_game),
          instance: state.instance + 1,
        }
    end
  end

  defp apply_game(_, _), do: raise "Do not know how to apply game state"

  ############
  # Interface 
  ############

  create_loop :start_game do
     {:start_game_ans, game_id} ->
       log("Started a game #{game_id}")
       {:start_game, game_id}
  end

  def start_game(name, participants) do
    safecast(name, {:start_game, participants, self()})
    start_game_loop(nil, 10000)
  end

  create_loop :get_game_state do
    {:game_state, ^v, :not_playing} ->
      log("Not Playing in that game")
      {:not_playing}
    {:game_state, ^v, :game_finished, score} ->
      log("Game finsihed, #{score}")
      {:game_finished, score}
    {:game_state, ^v, game_state, hand} ->
      log("Got game state, #{inspect(game_state)}, hand: #{inspect(hand)}")
      {:state, game_state, hand}
    {:game_state, ^v, :game_does_not_exist} ->
      log("Got game does not exist")
      {:not_exists}
  end

  def get_game_state(name, game_id) do
    safecast(name, {:get_game_state, game_id, self()})
    get_game_state_loop(game_id, 10000)
  end

  create_loop :make_move do
    {:make_move, ^v, :game_does_not_exist} ->
      log("Got game does not exist")
      {:not_exists}
    {:make_move, ^v, :not_playing} ->
      log("Not Playing in that game")
      {:not_playing}
    {:make_move, ^v, :game_finished, score} ->
      log("Game finsihed, #{score}")
      {:game_finished, score}
    {:make_move, ^v, :player_moved_before, game_state, hand} ->
      log("Player moved_before, #{inspect(game_state)} #{inspect(hand)}")
      {:player_moved_before, game_state, hand}
    {:make_move, ^v, :invalid_move} ->
      log("Invalid Move")
      {:invalid_move}
    {:make_move, ^v, game_state, hand} ->
      log("Got game state, #{inspect(game_state)}, hand: #{inspect(hand)}")
      {:state, game_state, hand}
  end

  def make_move(name, game_id, move) do
    safecast(name, {:make_move, game_id, move, self()})
    make_move_loop(game_id, 10000)
  end

  ############
  # Debug 
  ############

  def spinup(number_of_participants) do
    procs = Enum.to_list(0..number_of_participants) |> Enum.map(fn n -> :"p#{n}" end)
    Enum.map(procs, fn proc -> Server.start(proc, procs) end)
  end

  def kill (pids) do
    pids |> Enum.map(fn m -> Process.exit(m, :kill) end)
  end
end

defmodule Client do
  import Utils
  require Utils

  create_log 3
  
  def play_game(process, game_id) do
    game = Server.get_game_state(process, game_id)

    cont = case game do
      :timeout ->
        log("Could to not comunicate with the server")
        true
      {:not_exists} -> 
        log("Game does not exist")
        true
      {:not_playing} ->
        log("Not Playing in that game")
        true
      {:game_finished, score} ->
        log("Game finsihed, #{score}")
        true
      {:game_does_not_exist} ->
        log("Got game does not exist")
        true
      {:state, game_state, hand} ->
        game_state |> 
          to_name() |>
          interpolate() |>
          fill() |>
          printpt(to_name(hand))
        false
    end

    if not cont do
      to_play = IO.gets("Type the number you want to play or q to exit: ")
      to_play = to_play |> String.trim("\"") |> String.trim()

      case to_play do
        "q" ->
          log("Bye Bye")
        v ->
          try do
            {n, _} = Integer.parse(v)

            res = Server.make_move(process, game_id, n)
            case res do
              :timeout ->
                log("Could to not comunicate with the server")
              {:not_exists} -> log("Game does not exist")
              {:not_playing} -> log("Not Playing in that game")
              {:game_finished, score} -> log("Game finsihed, #{score}")
              {:game_does_not_exist} -> log("Got game does not exist")
              {:player_moved_before, _, _} ->
                log("Player Moved before you did please check the map and try again")
                play_game(process, game_id)
              {:invalid_move} -> raise "Invalid Move"
              {:state, _, _} -> play_game(process, game_id)
            end
          rescue
            _ -> 
              log("Please provide a valid number")
              play_game(process, game_id)
          end
      end
    end
  end


  def control_game(process, game_id) do
    to_play = IO.gets("Type the number you want to play or q to exit: ")
    to_play = to_play |> String.trim("\"") |> String.trim()

    case to_play do
      "q" ->
        log("Bye Bye")
      v ->
        try do
          {n, _} = Integer.parse(v)

          res = Server.make_move(process, game_id, n)
          case res do
            :timeout -> log("Could to not comunicate with the server")
            {:not_exists} -> control_game(process, game_id)
            {:not_playing} -> control_game(process, game_id)
            {:game_finished, _} -> control_game(process, game_id)
            {:player_moved_before, _, _} ->
              log("Player Moved before you did please check the map and try again")
              control_game(process, game_id)
            {:invalid_move} -> raise "Invalid Move"
            {:state, _, _} -> control_game(process, game_id)
          end
        rescue
          _ -> 
            log("Please provide a valid number")
            control_game(process, game_id)
        end
    end
  end


  def display_game(process, game_id, temp_game \\ [], temp_hand \\ []) do
    game = Server.get_game_state(process, game_id)

    cont = case game do
      :timeout -> log("Could to not comunicate with the server")
      {:not_exists} -> log("Game does not exist")
      {:not_playing} -> log("Not Playing in that game")
      {:game_finished, score} -> log("Game finsihed, #{score}")
      {:game_does_not_exist} -> log("Got game does not exist")
      {:state, game_state, hand} ->
        if temp_game != game_state or temp_hand != hand do
          # IO.ANSI.clear()
          game_state |> 
            to_name() |>
            interpolate() |>
            fill() |>
            printpt(to_name(hand))
          Process.sleep(1000)
          display_game(process, game_id, game_state, hand)
        else
          Process.sleep(1000)
          display_game(process, game_id, temp_game, temp_hand)
        end
    end
  end

  def to_name(list) when is_list(list), do: list |> Enum.map(fn x -> to_name(x) end)
  def to_name(atom) when atom == :+, do: IO.ANSI.color_background(9) <> IO.ANSI.color(15) <> " + " <> IO.ANSI.reset()
  def to_name(atom) when atom == :-, do: IO.ANSI.color_background(21) <> IO.ANSI.color(15) <> " - " <> IO.ANSI.reset()
  def to_name(atom) when atom == :b, do: IO.ANSI.color_background(232) <> IO.ANSI.color(15) <> " b " <> IO.ANSI.reset()
  def to_name(atom) when is_atom(atom), do: atom
  def to_name(i) do
    letter = [ "H", "He", "Li", "Be", "B", "C", "N", "O", "F", "Ne", "Na", "Mg", "Al", "Si", "P", "S", "Cl", "Ar", "K", "Ca", "Sc", "Ti", "V", "Cr", "Mn", "Fe", "Co", "Ni", "Cu", "Zn", "Ga", "Ge", "As", "Se", "Br", "Kr", "Rb", "Sr", "Y", "Zr", "Nb", "Mo", "Tc", "Ru", "Rh", "Pd", "Ag", "Cd", "In", "Sn", "Sb", "Te", "I", "Xe", "Cs", "Ba", "La", "Ce", "Pr", "Nd", "Pm", "Sm", "Eu", "Gd", "Tb", "Dy", "Ho", "Er", "Tm", "Yb", "Lu", "Hf", "Ta", "W", "Re", "Os", "Ir", "Pt", "Au", "Hg", "Tl", "Pb", "Bi", "Po", "At", "Rn", "Fr", "Ra", "Ac", "Th", "Pa", "U", "Np", "Pu", "Am", "Cm", "Bk", "Cf", "Es", "Fm", "Md", "No", "Lr", "Rf", "Db", "Sg", "Bh", "Hs", "Mt", "Ds", "Rg", "Cn", "Nh", "Fl", "Mc", "Lv", "Ts", "Og" ] |> Enum.at(i - 1)
    color = [46,45,138,19,11,140,8,47,57,159,72,48,55,35,251,188,107,110,21,11,156,134,128,179,140,234,14,90,206,7,249,209,253,123,192,165,234,136,198,208,43,34,215,127,23,250,177,237,124,202,229,
63,206,220,224,109,202,113,253,7,243,26,160,65,39,112,57,75, 252,82,213,186,68,243,134,100,226,48,90,134,208,102,25,106,72, 242,26,59,166,26,187,54,194,165,97,219,186,130,7,154,233,85, 130,67,43,200,90,60,148,49,161,110,247,116,223,159,132,132] |> Enum.at(i - 1) |> IO.ANSI.color()
    color <> String.pad_leading("#{letter}", 3, "  ") <> IO.ANSI.reset()
  end

  def interpolate(list) do
    [list, 0..length(list) - 1] |> 
      Enum.zip() |> 
      Enum.reduce([], fn {v, i}, acc -> acc ++ [String.pad_leading("#{i}", 3, "  "), v] end)
  end

  def grow_empty_list(t, i, acc) when i == 0, do: t ++ acc
  def grow_empty_list([], i, acc), do: grow_empty_list(acc, i, [])
  def grow_empty_list([h | tl], i, acc), do:
    grow_empty_list(tl, i - 1, acc ++ [ h ++ ["   "] ])

  def fill(list) do
    to_fill = 32 -  length(list)
    to_add = grow_empty_list(Enum.map(list, fn _ -> [] end), to_fill, [])
    fill(list, to_add, [])
  end

  def fill([], _, acc), do: acc
  def fill([hd | tail], [add_hd | add_tail], acc) do
    fill(tail, add_tail ,acc ++ [hd] ++ add_hd)
  end

  def printpt(game_state, hand), do: printpt(game_state, hand, 0)
  def printpt(_, _,  i) when i > 16, do: nil
  def printpt(game_state, hand, i) do
    res = case i do
      0 ->
        "                       xxx             \n" |>
          String.replace("xxx", Enum.at(game_state, 1))
      1 ->
        "                  xxx       yyy           \n" |>
          String.replace("xxx", Enum.at(game_state, 0)) |>
          String.replace("yyy", Enum.at(game_state, 2))
      2 ->
        "              xxx               yyy        \n" |>
          String.replace("xxx", Enum.at(game_state, 31)) |>
          String.replace("yyy", Enum.at(game_state, 3))
      3 ->
        "            xxx                   yyy       \n" |>
          String.replace("xxx", Enum.at(game_state, 30)) |>
          String.replace("yyy", Enum.at(game_state, 4))
      4 ->
        "          xxx                       yyy       \n" |>
          String.replace("xxx", Enum.at(game_state, 29)) |>
          String.replace("yyy", Enum.at(game_state, 5))
      5 ->
        "         xxx                         yyy      \n" |>
          String.replace("xxx", Enum.at(game_state, 28)) |>
          String.replace("yyy", Enum.at(game_state, 6))
      6 ->
        "       xxx                             yyy      \n" |>
          String.replace("xxx", Enum.at(game_state, 27)) |>
          String.replace("yyy", Enum.at(game_state, 7))
      7 ->
        "       xxx                             yyy      \n" |>
          String.replace("xxx", Enum.at(game_state, 26)) |>
          String.replace("yyy", Enum.at(game_state, 8))
      8 ->
        "       xxx             zzz             yyy      \n" |>
          String.replace("xxx", Enum.at(game_state, 25)) |>
          String.replace("yyy", Enum.at(game_state, 9)) |>
          String.replace("zzz", hand)
      9 ->
        "       xxx                             yyy      \n" |>
          String.replace("xxx", Enum.at(game_state, 24)) |>
          String.replace("yyy", Enum.at(game_state, 10))
      10 ->
        "        xxx                           yyy       \n" |>
          String.replace("xxx", Enum.at(game_state, 23)) |>
          String.replace("yyy", Enum.at(game_state, 11))
      11 ->
        "         xxx                         yyy       \n" |>
          String.replace("xxx", Enum.at(game_state, 22)) |>
          String.replace("yyy", Enum.at(game_state, 12))
      12 ->
        "          xxx                       yyy        \n" |>
          String.replace("xxx", Enum.at(game_state, 21)) |>
          String.replace("yyy", Enum.at(game_state, 13))
      13 ->
        "            xxx                   yyy        \n" |>
          String.replace("xxx", Enum.at(game_state, 20)) |>
          String.replace("yyy", Enum.at(game_state, 14))
      14 ->
        "              xxx               yyy         \n" |>
          String.replace("xxx", Enum.at(game_state, 19)) |>
          String.replace("yyy", Enum.at(game_state, 15))
      15 ->
        "                  xxx       yyy           \n" |>
          String.replace("xxx", Enum.at(game_state, 18)) |>
          String.replace("yyy", Enum.at(game_state, 16))
      16 ->
        "                       xxx        \n" |>
          String.replace("xxx", Enum.at(game_state, 17))
    end

    IO.write("#{res}")
    printpt(game_state, hand, i + 1)
  end
end