class RuboCop::Cop::Metrics::PerceivedComplexity

def complexity_score_for(node)
  case node.type
  when :case
    # If cond is nil, that means each when has an expression that
    # evaluates to true or false. It's just an alternative to
    # if/elsif/elsif... so the when nodes count.
    nb_branches = node.when_branches.length + (node.else_branch ? 1 : 0)
    if node.condition.nil?
      nb_branches
    else
      # Otherwise, the case node gets 0.8 complexity points and each
      # when gets 0.2.
      ((nb_branches * 0.2) + 0.8).round
    end
  when :if
    node.else? && !node.elsif? ? 2 : 1
  else
    super
  end
end