class RuboCop::RSpec::Wording

def initialize(text, ignore:, replace:)
  @text         = text
  @ignores      = ignore
  @replacements = replace
end

def rewrite
  text.split.tap do |words|
    first_word = words.shift
    words.unshift('not') if first_word.eql?("shouldn't")
    words.each_with_index do |value, key|
      next if ignores.include?(value)
      words[key] = simple_present(words.fetch(key))
      break
    end
  end.join(' ')
end

def simple_present(word)
  return replacements.fetch(word) if replacements.key?(word)
  # ends with o s x ch sh or ss
  if %w(o s x ch sh).any?(&word.public_method(:end_with?))
    return "#{word}es"
  end
  # ends with y
  if word.end_with?('y') && !%w(a u o e).include?(word[-2])
    return "#{word[0..-2]}ies"
  end
  "#{word}s"
end