require 'chutney/linter'
require 'engtagger'

module Chutney
  # service class to lint for avoiding periods
  class BeDeclarative < Linter
    MESSAGE = 'This step does not contain a verb'.freeze
  
    def initialize
      super
    end

    def lint
      filled_scenarios do |file, feature, scenario|
        scenario[:steps].each do |step|
          references = [reference(file, feature, scenario, step)]
          add_warning(references, MESSAGE) unless verb? step
        end
      end
    end

    def verb?(step)
      tagged = tagger.add_tags step[:text]
      step_verbs = verbs tagged

      !step_verbs.empty?
    end

    def verbs(tagged_text)
      verbs =
        %i[
          get_infinitive_verbs
          get_past_tense_verbs
          get_gerund_verbs
          get_passive_verbs
          get_present_verbs
          get_base_present_verbs
        ]

      verbs.map { |verb| tagger.send(verb, tagged_text).keys }.flatten
    end

    def tagger
      @tagger = EngTagger.new unless instance_variable_defined? :@tagger

      @tagger
    end
  end
end