class KarmaPlugin < Plugin
  def initialize
    super

    # this plugin only wants to store ints!
    class << @registry
      def store(val)
        val.to_i
      end
      def restore(val)
        val.to_i
      end
    end
    @registry.set_default(0)

    # import if old file format found
    if(File.exist?("#{@bot.botclass}/karma.rbot"))
      puts "importing old karma data"
      IO.foreach("#{@bot.botclass}/karma.rbot") do |line|
        if(line =~ /^(\S+)<=>([\d-]+)$/)
          item = $1
          karma = $2.to_i
          @registry[item] = karma
        end
      end
      File.delete("#{@bot.botclass}/karma.rbot")
    end

  end
  def help(plugin, topic="")
    "karma module: <thing>++/<thing>-- => increase/decrease karma for <thing>, karma for <thing>? => show karma for <thing>. Karma is a community rating system - only in-channel messages can affect karma and you cannot adjust your own."
  end
  def listen(m)
    if(m.kind_of?(PrivMessage) && m.public?)
      # in channel message, the kind we are interested in
      if(m.message =~ /(\+\+|--)/)
        string = m.message.sub(/\W(--|\+\+)(\(.*?\)|[^(++)(\-\-)\s]+)/, "\2\1")
        seen = Hash.new
        while(string.sub!(/(\(.*?\)|[^(++)(\-\-)\s]+)(\+\+|--)/, ""))
          key = $1
          change = $2
          next if seen[key]
          seen[key] = true

          key.sub!(/^\((.*)\)$/, "\1")
          key.gsub!(/\s+/, " ")
          next unless(key.length > 0)
          next if(key == m.sourcenick)
          if(change == "++")
            @registry[key] += 1
          elsif(change == "--")
            @registry[key] -= 1
          end
        end
      end
    end
  end
  def privmsg(m)
    if (m.plugin == "karmastats")
      if (@registry.length)
        max = @registry.values.max
        min = @registry.values.min
        best = @registry.to_hash.index(max)
        worst = @registry.to_hash.index(min)
        m.reply "#{@registry.length} votes. Best: #{best} (#{max}); Worst: #{worst} (#{min})"
        return
      end
    end
    unless(m.params)
      m.reply "incorrect usage: " + m.plugin
      return
    end
    if(m.params =~ /^(?:for\s+)?(\S+?)\??$/)
      thing = $1
      karma = @registry[thing]
      if(karma != 0)
        m.reply "karma for #{thing}: #{@registry[thing]}"
      else
        m.reply "#{thing} has neutral karma"
      end
    end
  end
end
plugin = KarmaPlugin.new
plugin.register("karma")
plugin.register("karmastats")