class Cucumber::Ast::Background

def accept(visitor)
  return if Cucumber.wants_to_quit
  visitor.visit_comment(@comment) unless @comment.empty?
  visitor.visit_background_name(@keyword, @name, file_colon_line(@line), source_indent(first_line_length))
  with_visitor(hook_context, visitor) do
    visitor.step_mother.before(hook_context)
    visitor.visit_steps(@step_invocations)
    @failed = @step_invocations.detect{|step_invocation| step_invocation.exception}
    visitor.step_mother.after(hook_context) if @failed || @feature_elements.empty?
  end
end

def accept_hook?(hook)
  if hook_context != self
    hook_context.accept_hook?(hook)
  else
    # We have no scenarios, just ask our feature
    @feature.accept_hook?(hook)
  end
end

def failed?
  @failed
end

def hook_context
  @feature_elements.first || self
end

def initialize(comment, line, keyword, name, steps)
  @comment, @line, @keyword, @name, @steps = comment, line, keyword, name, StepCollection.new(steps)
  attach_steps(steps)
  @step_invocations = @steps.step_invocations(true)
  @feature_elements = []
end

def step_collection(step_invocations)
  unless(@first_collection_created)
    @first_collection_created = true
    @step_invocations.dup(step_invocations)
  else
    @steps.step_invocations(true).dup(step_invocations)
  end
end

def to_sexp
  sexp = [:background, @line, @keyword]
  sexp += [@name] unless @name.empty?
  comment = @comment.to_sexp
  sexp += [comment] if comment
  steps = @steps.to_sexp
  sexp += steps if steps.any?
  sexp
end

def with_visitor(scenario, visitor)
  if self != scenario && scenario.respond_to?(:with_visitor)
    scenario.with_visitor(visitor) do
      yield
    end
  else
    yield
  end
end