class Cucumber::StepMatchSearch::AttemptToGuessAmbiguousMatch

def best_matches(step_name, step_matches) #:nodoc:
  no_groups      = step_matches.select {|step_match| step_match.args.length == 0}
  max_arg_length = step_matches.map {|step_match| step_match.args.length }.max
  top_groups     = step_matches.select {|step_match| step_match.args.length == max_arg_length }
  if no_groups.any?
    longest_regexp_length = no_groups.map {|step_match| step_match.text_length }.max
    no_groups.select {|step_match| step_match.text_length == longest_regexp_length }
  elsif top_groups.any?
    shortest_capture_length = top_groups.map {|step_match| step_match.args.inject(0) {|sum, c| sum + c.to_s.length } }.min
    top_groups.select {|step_match| step_match.args.inject(0) {|sum, c| sum + c.to_s.length } == shortest_capture_length }
  else
    top_groups
  end
end

def call(step_name)
  best_matches(step_name, @search.call(step_name))
end

def initialize(search)
  @search = search
end