module Ruboty
  module Handlers
    class Ping < Base
      on(
        /(\d*)d(\d+) *(\+ *(\d+))?\z/i,
        name: "roll",
        description: "Roll dice"
      )

      def roll(message)
        count = message.match_data[1].to_i
        count = 1 if count.zero?

        surface = message.match_data[2].to_i
        additional = message.match_data[4]&.to_i

        rolls = count.times.map { rand(surface) + 1}
        rolls << additional if additional

        message.reply ":game_die: #{rolls.sum} (#{rolls.join(' + ')})"
      end
    end
  end
end