module ResearchTopicGen

# File lib/research_topicgen.rb, line 127
def self.add_article(word, caps=false)
  if word.downcase.start_with?('a', 'e', 'i', 'o', 'u')
    article = "an"
  else
    article = 'a'
  end
  caps ? article.capitalize : article
end

# File lib/research_topicgen.rb, line 8
def self.crypto
  cf = self.load_yml_data( 'crypto' )
  word1, word2, word3 = self.samples( BZS, cf )
  until word1 != word2
    word2 = cf[:buzz2].sample
  end
  pre_connective = self.add_article(word1, caps=true)
  "#{pre_connective} #{word1}, #{word2} #{word3}."
end

# File lib/research_topicgen.rb, line 19
def self.cs
  connectives_file, cs_file = self.load_file('cs')
  com_connective      = [
    connectives_file[:common_connectives].sample,
    connectives_file[:extra_connectives][1]
  ].sample

  pre_wrds = self.samples( %i[buzz1 buzz2 buzz3], cs_file )
  pst_wrds = self.samples( %i[buzz1 buzz2 buzz3], cs_file )
  pre_connective = self.add_article(pre_wrds.first, caps=true)
  mid_connective = self.add_article(pst_wrds.first)

  sentence = [
    pre_connective,
    *pre_wrds,
    com_connective,
    mid_connective,
    *pst_wrds
  ]
  "#{sentence.join ' '}."
end

# File lib/research_topicgen.rb, line 145
def self.load_file(topic)
  conf = load_yml_data('connectives')
  [ conf, load_yml_data(topic) ]
end

# File lib/research_topicgen.rb, line 140
def self.load_yml_data(topic)
  data = File.join( File.dirname(__FILE__), "data", "#{topic}.yml" )
  Psych.load_file( data )
end

# File lib/research_topicgen.rb, line 49
def self.random
  topic = %w[ cs system crypto ].sample
  self.send( topic )
end

# File lib/research_topicgen.rb, line 136
def self.samples( keys , table )
  keys.map { |key| table[key].sample }
end

# File lib/research_topicgen.rb, line 42
def self.system
  mtds = [:generic, :approach_based, :onfoo, :looong, :ings]
  gen = SystemTopicGenerator.new
  gen.send( mtds.sample )
end