# == Synopsis
#
# Play a game of Trap the Cap.
# 
# == Author
# Neil Smith
# 
# == Change history
# Version 1.1::  23 April 2008 

require 'lib/libttc'
require 'lib/libpplayer'

# Play a game to completion, given a set of player agents.
class GameHandler
    
  attr_reader :game
    
  # Create a game handler that uses a set of players
  def initialize(players, limit = 5000, verbose = false, very_verbose = false)
    @game = Game.new(players.length)
    @verbose = verbose
    @very_verbose = very_verbose
    @limit = limit
    
    # Give each player a name
    @named_players = Hash.new 
    (@game.players.zip players).each do |kv|
      @named_players[kv[0]] = kv[1]
    end
  end
  
  # Play a game of Trap the Cap.  If players make illegal moves, disqualify them and restart the game.  
  # Terminate the game if there's a winner, there's only one player left, 
  # or the game has gone on too long.
  def play
    while @game.history.length < @limit
      roll = rand(6) + 1
      move_to_apply = @named_players[@game.current_player].best_move(@game, roll)
      puts "Move #{@game.history.length + 1}: Player #{@game.current_player} rolled #{roll}: making move #{move_to_apply}" if @verbose
      @game.apply_moves! [move_to_apply]
      puts @game if @very_verbose
    end
    puts "Game terminated after #{@game.history.length} moves" if @verbose
    [:draw, @limit]
  rescue GameWonNotice => win_notification
    winner = win_notification.message[-1,1]
    puts "Game won by #{winner} in #{@game.history.length} moves" if @verbose
    [@named_players[winner], @game.history.length]
  rescue InvalidCaptureError, InvalidMoveError
    puts "Disqualifying player #{@game.current_player}" if @verbose
    @named_players.delete @game.current_player
    if @named_players.length > 1
      retry
    else
      puts "Game won by #{@named_players.keys[0]} by default" if @verbose
      [@named_players[@named_players.keys[0]], 0]
    end
  end 
end