require "carnival/version"

module Carnival
  def self.noun
    get_item("items")
  end
  
  def self.adj
    get_item("adj")
  end
  
  def self.a_name
    format("%A%N")
  end
  
  def self.a_hyp_name
    format("%A-%N")
  end
  
  def self.a_name_rand
    format("%A%N-%II")
  end
  
  def self.a_hyp_name_rand
    format("%A-%N-%II")
  end 
  
  # Accepts a string of any pattern and replaces the keywords below:
  # %N - Gets replaced with a random noun
  # %A - Gets replaced with a random adj
  # %I..I - Get replaced with a random number that's the same length as the num of I's
  #
  # All keywords are repeatable
  def self.format(formatString)
    finalString = formatString
    
    while not finalString.index("%A").nil?
      finalString = finalString.sub("%A", adj)
    end
    
    while not finalString.index("%N").nil?
      finalString = finalString.sub("%N", noun)
    end
    
    matchArray = finalString.scan(/%I+/)
    unless matchArray.nil?
      matchArray.each do |match|
        length = match.size - 1
        num = rand(10 ** length).to_s.rjust(length,'0')
        finalString = finalString.sub(match, num)
      end
    end
    
    return finalString
  end
  
  def self.get_item(filename)
    File.read(File.expand_path("../carnival/#{filename}.txt", __FILE__)).split("\n").sample.strip.downcase
  end
end