class Cucumber::Ast::Feature

def accept(visitor)
  return if Cucumber.wants_to_quit
  visitor.visit_comment(@comment) unless @comment.empty?
  visitor.visit_tags(@tags)
  visitor.visit_feature_name(@keyword, indented_name)
  visitor.visit_background(@background) if !@background.is_a?(EmptyBackground)
  @feature_elements.each do |feature_element|
    visitor.visit_feature_element(feature_element)
  end
end

def accept_hook?(hook)
  @tags.accept_hook?(hook)
end

def backtrace_line(step_name, line)
  "#{location.on_line(line)}:in `#{step_name}'"
end

def gherkin_statement(statement=nil)
  @gherkin_statement ||= statement
end

def indented_name
  indent = ""
  name.split("\n").map do |l|
    s = "#{indent}#{l}"
    indent = "  "
    s
  end.join("\n")
end

def initialize(location, background, comment, tags, keyword, title, description, feature_elements)
  @background, @comment, @tags, @keyword, @title, @description, @feature_elements = background, comment, tags, keyword, title, description, feature_elements
  @background.feature = self
  @location = location
  @feature_elements.each { |e| e.feature = self }
end

def short_name
  first_line = name.split(/\n/)[0]
  if first_line =~ /#{language.keywords('feature')}:(.*)/
    $1.strip
  else
    first_line
  end
end

def source_tag_names
  source_tags.map { |tag| tag.name }
end

def source_tags
  @tags.tags
end

def step_count
  units.inject(0) { |total, unit| total += unit.step_count }
end

def to_sexp
  sexp = [:feature, file, name]
  comment = @comment.to_sexp
  sexp += [comment] if comment
  tags = @tags.to_sexp
  sexp += tags if tags.any?
  sexp += [@background.to_sexp] if @background
  sexp += @feature_elements.map{|fe| fe.to_sexp}
  sexp
end

def units
  @units ||= @feature_elements.map do |element| 
    element.to_units(background)
  end.flatten
end