module RandomUsername

# File lib/random_username.rb, line 6
def self.adjective(options = {})
  get_item("adjectives", options)
end

# File lib/random_username.rb, line 20
def self.get_item(filename, options = {})
  items = items_from_file(filename)
  items.select!{ |item| item.length <= options[:max_length] } if options[:max_length]
  items.select!{ |item| item.length >= options[:min_length] } if options[:min_length]
  items.sample(random: options[:random] || Random.new) || fail(RandomUsername::Error, "No words found")
end

# File lib/random_username.rb, line 27
def self.items_from_file(filename)
  filepath = File.expand_path("../random_username/#{filename}.txt", __FILE__)
  File.read(filepath).split("\n")
end

# File lib/random_username.rb, line 10
def self.noun(options = {})
  get_item("nouns", options)
end

# File lib/random_username.rb, line 14
def self.username(options = {})
  options[:max_length] /= 2 if options[:max_length]
  options[:min_length] /= 2 if options[:min_length]
  adjective(options) + noun(options)
end