#-- vim:sw=2:et
#++
#
# :title: Hangman/Wheel Of Fortune
#
# Author:: Giuseppe "Oblomov" Bilotta <giuseppe.bilotta@gmail.com>
# Copyright:: (C) 2007 Giuseppe Bilotta
# License:: rbot

# Wheel-of-Fortune Question/Answer
class WoFQA
  attr_accessor :cat, :clue, :hint
  attr_reader :answer
  attr_accessor :guessed
  def initialize(cat, clue, ans=nil)
    @cat = cat # category
    @clue = clue # clue phrase
    self.answer = ans
    @guessed = false
  end

  def guessed?
    @guessed
  end

  def catclue
    ret = ""
    ret << "(" + cat + ") " unless cat.empty?
    ret << clue
  end

  def answer=(ans)
    if !ans
      @answer = nil
      @split = []
      @hint = []
      return
    end
    @answer = ans.dup.downcase
    @split = @answer.scan(/./u)
    @hint = @split.inject([]) { |list, ch|
      if ch !~ /[a-z]/
        list << ch
      else
        list << "*"
      end
    }
    @used = []
  end

  def announcement
    ret = self.catclue
    if !@used.empty?
      ret << _(" [Letters called so far: %{red}%{letters}%{nocolor}]") % {
        :red => Irc.color(:red),
        :letters => @used.join(" "),
        :nocolor => Irc.color()
      }
    end
    ret << "\n"
    ret << @hint.join
  end

  def check(ans_or_letter)
    d = ans_or_letter.downcase
    if d == @answer
      return :gotit
    elsif d.length == 1
      if @used.include?(d)
        return :used
      else
        @used << d
        @used.sort!
        if @split.include?(d)
          count = 0
          @split.each_with_index { |c, i|
            if c == d
              @hint[i] = d.upcase
              count += 1
            end
          }
          return count
        else
          return :missing
        end
      end
    else
      return :wrong
    end
  end

end

# Wheel-of-Fortune game
class WoFGame
  attr_reader :name, :manager, :single, :max, :pending
  attr_writer :running
  attr_accessor :must_buy, :price
  def initialize(name, manager, single, max)
    @name = name.dup
    @manager = manager
    @single = single.to_i
    @max = max.to_i
    @pending = nil
    @qas = []
    @curr_idx = nil
    @running = false
    @scores = Hash.new

    # the default is to make vowels usable only
    # after paying a price in points which is
    # a fraction of the single round score equal
    # to the number of rounds needed to win the game
    # TODO customize
    @must_buy = %w{a e i o u y}
    @price = @single*@single/@max
  end

  def running?
    @running
  end

  def round
    @curr_idx+1 rescue 0
  end

  def length
    @qas.length
  end

  def qa(round)
    if @pending and round == self.length + 1
      @pending
    else
      @qas[round-1]
    end
  end

  def buy(user)
    k = user.botuser
    if @scores.key?(k) and @scores[k][:score] >= @price
      @scores[k][:score] -= @price
      return true
    else
      return false
    end
  end

  def score(user)
    k = user.botuser
    if @scores.key?(k)
      @scores[k][:score]
    else
      0
    end
  end

  def mark_guessed(qa)
    qa.guessed = true
  end

  def mark_winner(user)
    @running = false
    k = user.botuser
    if @scores.key?(k)
      @scores[k][:nick] = user.nick
      @scores[k][:score] += @single
    else
      @scores[k] = { :nick => user.nick, :score => @single }
    end
    if @scores[k][:score] >= @max
      return :done
    else
      return :more
    end
  end

  def score_table
    table = []
    @scores.each { |k, val|
      table << ["%s (%s)" % [val[:nick], k], val[:score]]
    }
    table.sort! { |a, b| b.last <=> a.last }
  end

  def current
    return nil unless @curr_idx
    @qas[@curr_idx]
  end

  def next
    # don't advance if there are no further QAs
    return nil if @curr_idx == @qas.length - 1
    if @curr_idx
      @curr_idx += 1
    else
      @curr_idx = 0
    end
    return current
  end

  def check(whatever, o={})
    cur = self.current
    return nil unless cur
    if @must_buy.include?(whatever) and not o[:buy]
      return whatever
    end
    return cur.check(whatever)
  end

  def start_add_qa(cat, clue)
    return [nil, @pending] if @pending
    @pending = WoFQA.new(cat.dup, clue.dup)
    return [true, @pending]
  end

  def finish_add_qa(ans)
    return nil unless @pending
    @pending.answer = ans.dup
    @qas << @pending
    @pending = nil
    return @qas.last
  end
end

class WheelOfFortune < Plugin
  Config.register Config::StringValue.new('wheelfortune.game_name',
    :default => 'Wheel Of Fortune',
    :desc => "default name of the Wheel Of Fortune game")

  def initialize
    super
    # TODO load/save running games?
    @games = Hash.new
  end

  def help(plugin, topic="")
    case topic
    when 'play'
      _("wof [<channel>] play [<name>] for <single> to <max> => starts a wheel-of-fortune game on channel <channel> (default: current channel), named <name> (default: wheelfortune.game_name config setting, or the last game name used by the user), with <single> points per round. the game is won when a player reachers <max> points. vowels cost <single>*<single>/<max> points. The user that starts the game is the game manager and must set up the clues and answers in private. All the other users have to learn the answer to each clue by saying single consonants or the whole sentence. Every time a consonant is guessed, the bot will reveal the partial answer, showing the missing letters as * (asterisks).")
    when 'category', 'clue', 'answer'
      _("wof <channel> [category: <cat>,] clue: <clue>, answer: <ans> => set up a new question for the wheel-of-fortune game being played on channel <channel>. This command must be sent in private by the game manager. The category <cat> can be omitted. If you make mistakes, you can use 'wof replace' (see help) before the question gets asked")
    when 'replace'
      _("wof <channel> replace <round> [category: <cat>,] [clue: <clue>,] [answer: <ans>] => fix the question for round <round> of the wheel-of-fortune game being played on <channel> by replacing the category and/or clue and/or answer")
    when 'cancel'
      _("wof cancel => cancels the wheel-of-fortune being played on the current channel")
    when 'buy'
      _("wof buy <vowel> => buy the vowel <vowel>: the user buying the vowel will lose points equal to the vowel price, and the corresponding vowel will be revealed in the answer (if present)")
    else
      _("wof: wheel-of-fortune plugin. topics: play, category, clue, answer, replace, cancel, buy")
    end
  end

  def setup_game(m, p)
    chan = p[:chan] || m.channel
    if !chan
      m.reply _("you must specify a channel")
      return
    end
    ch = chan.irc_downcase(m.server.casemap).intern

    if game = @games[ch]
      m.reply _("there's already a %{name} game on %{chan}, managed by %{who}") % {
        :name => game.name,
        :chan => chan,
        :who => game.manager
      }
      return
    end
    name = p[:name].to_s
    if name.empty?
      name = m.source.get_botdata("wheelfortune.game_name") || @bot.config['wheelfortune.game_name']
    else
      m.source.set_botdata("wheelfortune.game_name", name.dup)
    end
    @games[ch] = game = WoFGame.new(name, m.botuser, p[:single], p[:max])
    @bot.say chan, _("%{who} just created a new %{name} game to %{max} points (%{single} per question, %{price} per vowel)") % {
      :name => game.name,
      :who => game.manager,
      :max => game.max,
      :single => game.single,
      :price => game.price
    }
    @bot.say m.source, _("ok, the game has been created. now add clues and answers with \"wof %{chan} [category: <category>,] clue: <clue>, answer: <ans>\". if the clue and answer don't fit in one line, add the answer separately with \"wof %{chan} answer <answer>\"") % {
      :chan => chan
    }
  end

  def setup_qa(m, p)
    ch = p[:chan].irc_downcase(m.server.casemap).intern
    if !@games.key?(ch)
      m.reply _("there's no %{name} game running on %{chan}") % {
        :name => @bot.config['wheelfortune.game_name'],
        :chan => p[:chan]
      }
      return
    end
    game = @games[ch]

    if m.botuser != game.manager and !m.botuser.permit?('wheelfortune::manage::other::add')
      m.reply _("you can't add questions to the %{name} game on %{chan}") % {
        :name => game.name,
        :chan => p[:chan]
      }
    end

    cat = p[:cat].to_s
    clue = p[:clue].to_s
    ans = p[:ans].to_s
    if ans.include?('*')
      m.reply _("sorry, the answer cannot contain the '*' character")
      return
    end

    if !clue.empty?
      worked, qa = game.start_add_qa(cat, clue)
      if worked
        str = ans.empty? ?  _("ok, clue added for %{name} round %{count} on %{chan}: %{catclue}") : nil
      else
        str = _("there's already a pending clue for %{name} round %{count} on %{chan}: %{catclue}")
      end
      m.reply _(str) % {
        :chan => p[:chan],
        :catclue => qa.catclue,
        :name => game.name,
        :count => game.length+1
      } if str
      return unless worked and !ans.empty?
    end
    if !ans.empty?
      qa = game.finish_add_qa(ans)
      if qa
        str = _("ok, QA added for %{name} round %{count} on %{chan}: %{catclue} => %{ans}")
      else
        str = _("there's no pending clue for %{name} on %{chan}!")
      end
      m.reply _(str) % {
        :chan => p[:chan],
        :catclue => qa ? qa.catclue : nil,
        :ans => qa ? qa.answer : nil,
        :name => game.name,
        :count => game.length
      }
      announce(m, p) unless game.running?
    else
      m.reply _("something went wrong, I can't seem to understand what you're trying to set up") if clue.empty?
    end
  end

  def replace_qa(m, p)
    ch = p[:chan].irc_downcase(m.server.casemap).intern
    if !@games.key?(ch)
      m.reply _("there's no %{name} game running on %{chan}") % {
        :name => @bot.config['wheelfortune.game_name'],
        :chan => p[:chan]
      }
      return
    end
    game = @games[ch]

    if m.botuser != game.manager and !m.botuser.permit?('wheelfortune::manage::other::add')
      m.reply _("you can't replace questions to the %{name} game on %{chan}") % {
        :name => game.name,
        :chan => p[:chan]
      }
    end

    round = p[:round].to_i

    min = game.round
    max = game.length
    max += 1 if game.pending
    if round <= min or round > max
      if min == max
        m.reply _("there are no questions in the %{name} game on %{chan} which can be replaced") % {
          :name => game.name,
          :chan => p[:chan]
        }
      else
        m.reply _("you can only replace questions between rounds %{min} and %{max} in the %{name} game on %{chan}") % {
          :name => game.name,
          :min => min,
          :max => max,
          :chan => p[:chan]
        }
      end
      return
    end

    cat = p[:cat].to_s
    clue = p[:clue].to_s
    ans = p[:ans].to_s
    if ans.include?('*')
      m.reply _("sorry, the answer cannot contain the '*' character")
      return
    end

    qa = game.qa(round)
    qa.cat = cat unless cat.empty?
    qa.clue = clue unless clue.empty?
    unless ans.empty?
      if game.pending and round == max
        game.finish_add_qa(ans)
      else
        qa.answer = ans
      end
    end

    str = _("ok, replaced QA for %{name} round %{count} on %{chan}: %{catclue} => %{ans}")
    m.reply str % {
      :chan => p[:chan],
      :catclue => qa ? qa.catclue : nil,
      :ans => qa ? qa.answer : nil,
      :name => game.name,
      :count => round
    }
  end

  def announce(m, p={})
    chan = p[:chan] || m.channel
    ch = chan.irc_downcase(m.server.casemap).intern
    if !@games.key?(ch)
      m.reply _("there's no %{name} game running on %{chan}") % {
        :name => @bot.config['wheelfortune.game_name'],
        :chan => chan
      }
      return
    end
    game = @games[ch]
    qa = game.current
    if !qa or qa.guessed?
      qa = game.next
    end
    if !qa
      m.reply _("there are no %{name} questions for %{chan}, I'm waiting for %{who} to add them") % {
        :name => game.name,
        :chan => chan,
        :who => game.manager
      }
      return
    end

    @bot.say chan, _("%{bold}%{color}%{name}%{bold}, round %{count}:%{nocolor} %{qa}") % {
      :bold => Bold,
      :color => Irc.color(:green),
      :name => game.name,
      :count => game.round,
      :nocolor => Irc.color(),
      :qa => qa.announcement,
    }
    game.running = true
  end

  def score_table(chan, game, opts={})
    limit = opts[:limit] || -1
    table = game.score_table[0..limit]
    if table.length == 0
      @bot.say chan, _("no scores")
      return
    end
    nick_wd = table.map { |a| a.first.length }.max
    score_wd = table.first.last.to_s.length
    table.each { |t|
      @bot.say chan, "%*s : %*u" % [nick_wd, t.first, score_wd, t.last]
    }
  end

  def react_on_check(m, ch, game, check)
    debug "check: #{check.inspect}"
    case check
    when nil
      # can this happen?
      warning "game #{game}, qa #{game.current} checked nil against #{m.message}"
      return
    when :used
      # m.reply "STUPID! YOU SO STUPID!"
      return
    when *game.must_buy
      m.reply _("You must buy the %{vowel}") % {:vowel => check}, :nick => true
    when :wrong
      return
    when Numeric, :missing
      # TODO may alter score depening on how many letters were guessed
      # TODO what happens when the last hint reveals the whole answer?
      announce(m)
    when :gotit
      game.mark_guessed(game.current)
      want_more = game.mark_winner(m.source)
      m.reply _("%{who} got it! The answer was: %{ans}") % {
        :who => m.sourcenick,
        :ans => game.current.answer
      }
      if want_more == :done
        # max score reached
        m.reply _("%{bold}%{color}%{name}%{bold}%{nocolor}: %{who} %{bold}wins%{bold} after %{count} rounds!\nThe final score is") % {
          :bold => Bold,
          :color => Irc.color(:green),
          :who => m.sourcenick,
          :name => game.name,
          :count => game.round,
          :nocolor => Irc.color()
        }
        score_table(m.channel, game)
        @games.delete(ch)
      else
        m.reply _("%{bold}%{color}%{name}%{bold}, round %{count}%{nocolor} -- score so far:") % {
          :bold => Bold,
          :color => Irc.color(:green),
          :name => game.name,
          :count => game.round,
          :nocolor => Irc.color()
        }
        score_table(m.channel, game)
        announce(m)
      end
    else
      # can this happen?
      warning "game #{game}, qa #{game.current} checked #{check} against #{m.message}"
    end
  end

  def message(m)
    return if m.address?
    ch = m.channel.irc_downcase(m.server.casemap).intern
    return unless game = @games[ch]
    return unless game.running?
    return unless game.current and not game.current.guessed?
    check = game.check(m.message, :buy => false)
    react_on_check(m, ch, game, check)
  end

  def buy(m, p)
    ch = m.channel.irc_downcase(m.server.casemap).intern
    game = @games[ch]
    if not game
      m.reply _("there's no %{name} game running on %{chan}") % {
        :name => @bot.config['wheelfortune.game_name'],
        :chan => m.channel
      }
      return
    elsif !game.running?
      m.reply _("there are no %{name} questions for %{chan}, I'm waiting for %{who} to add them") % {
        :name => game.name,
        :chan => chan,
        :who => game.manager
      }
      return
    else
      vowel = p[:vowel]
      bought = game.buy(m.source)
      if bought
        m.reply _("%{who} buys a %{vowel} for %{price} points") % {
          :who => m.source,
          :vowel => vowel,
          :price => game.price
        }
        check = game.check(vowel, :buy => true)
        react_on_check(m, ch, game, check)
      else
        m.reply _("you can't buy a %{vowel}, %{who}: it costs %{price} points and you only have %{score}") % {
          :who => m.source,
          :vowel => vowel,
          :price => game.price,
          :score => game.score(m.source)
        }
      end
    end
  end

  def cancel(m, p)
    ch = m.channel.irc_downcase(m.server.casemap).intern
    if !@games.key?(ch)
      m.reply _("there's no %{name} game running on %{chan}") % {
        :name => @bot.config['wheelfortune.game_name'],
        :chan => m.channel
      }
      return
    end
    # is the botuser the manager or allowed to cancel someone else's game?
    if m.botuser == @games[ch].manager or m.botuser.permit?('wheelfortune::manage::other::cancel')
      do_cancel(ch)
    else
      m.reply _("you can't cancel the current game")
    end
  end

  def do_cancel(ch)
    game = @games.delete(ch)
    chan = ch.to_s
    @bot.say chan, _("%{name} game cancelled after %{count} rounds. Partial score:") % {
      :name => game.name,
      :count => game.round
    }
    score_table(chan, game)
  end

  def cleanup
    @games.each_key { |k| do_cancel(k) }
    super
  end
end

plugin = WheelOfFortune.new

plugin.map "wof", :action => 'announce', :private => false
plugin.map "wof cancel", :action => 'cancel', :private => false
plugin.map "wof [:chan] play [*name] for :single [points] to :max [points]", :action => 'setup_game'
plugin.map "wof :chan [category: *cat,] clue: *clue[, answer: *ans]", :action => 'setup_qa', :public => false
plugin.map "wof :chan answer: *ans", :action => 'setup_qa', :public => false
plugin.map "wof :chan replace :round [category: *cat,] clue: *clue[, answer: *ans]", :action => 'replace_qa', :public => false
plugin.map "wof :chan replace :round [category: *cat,] answer: *ans", :action => 'replace_qa', :public => false
plugin.map "wof :chan replace :round category: *cat[, clue: *clue[, answer: *ans]]", :action => 'replace_qa', :public => false
plugin.map "wof buy :vowel", :action => 'buy', :requirements => { :vowel => /./u }