src/play.rb

   1 # == Synopsis
   2 #
   3 # Play a game of Trap the Cap.
   4 #
   5 # == Author
   6 # Neil Smith
   7 #
   8 # == Change history
   9 # Version 1.1::  23 April 2008
  10
  11 require 'lib/libttc'
  12 require 'lib/libpplayer'
  13
  14 # Play a game to completion, given a set of player agents.
  15 class GameHandler
  16
  17   attr_reader :game
  18
  19   # Create a game handler that uses a set of players
  20   def initialize(players, limit = 5000, verbose = false, very_verbose = false)
  21     @game = Game.new(players.length)
  22     @verbose = verbose
  23     @very_verbose = very_verbose
  24     @limit = limit
  25
  26     # Give each player a name
  27     @named_players = Hash.new
  28     (@game.players.zip players).each do |kv|
  29       @named_players[kv[0]] = kv[1]
  30     end
  31   end
  32
  33   # Play a game of Trap the Cap.  If players make illegal moves, disqualify them and restart the game.
  34   # Terminate the game if there's a winner, there's only one player left,
  35   # or the game has gone on too long.
  36   def play
  37     while @game.history.length < @limit
  38       roll = rand(6) + 1
  39       move_to_apply = @named_players[@game.current_player].best_move(@game, roll)
  40       puts "Move #{@game.history.length + 1}: Player #{@game.current_player} rolled #{roll}: making move #{move_to_apply}" if @verbose
  41       @game.apply_moves! [move_to_apply]
  42       puts @game if @very_verbose
  43     end
  44     puts "Game terminated after #{@game.history.length} moves" if @verbose
  45     [:draw, @limit]
  46   rescue GameWonNotice => win_notification
  47     winner = win_notification.message[-1,1]
  48     puts "Game won by #{winner} in #{@game.history.length} moves" if @verbose
  49     [@named_players[winner], @game.history.length]
  50   rescue InvalidCaptureError, InvalidMoveError
  51     puts "Disqualifying player #{@game.current_player}" if @verbose
  52     @named_players.delete @game.current_player
  53     if @named_players.length > 1
  54       retry
  55     else
  56       puts "Game won by #{@named_players.keys[0]} by default" if @verbose
  57       [@named_players[@named_players.keys[0]], 0]
  58     end
  59   end
  60 end
  61