module RuboCop::Cop::MethodComplexity

def complexity(node)
  node.each_node(*self.class::COUNTED_NODES).reduce(1) do |score, n|
    score + complexity_score_for(n)
  end
end

def on_def(node)
  max = cop_config['Max']
  complexity = complexity(node)
  return unless complexity > max
  add_offense(node, :keyword, format(self.class::MSG,
                                     node.method_name,
                                     complexity,
                                     max)) do
    self.max = complexity.ceil
  end
end