module RuboCop::Cop::CodeLength

def build_code_length_calculator(node)
  Metrics::Utils::CodeLengthCalculator.new(
    node,
    processed_source,
    count_comments: count_comments?,
    foldable_types: count_as_one
  )
end

def check_code_length(node)
  # Skip costly calculation when definitely not needed
  return if node.line_count <= max_length
  calculator = build_code_length_calculator(node)
  length = calculator.calculate
  return if length <= max_length
  location = node.casgn_type? ? node.loc.name : node.source_range
  add_offense(location, message: message(length, max_length)) { self.max = length }
end

def count_as_one
  Array(cop_config['CountAsOne']).map(&:to_sym)
end

def count_comments?
  cop_config['CountComments']
end

def irrelevant_line(source_line)
  source_line.blank? || (!count_comments? && comment_line?(source_line))
end

def max_length
  cop_config['Max']
end

def message(length, max_length)
  format(MSG, label: cop_label, length: length, max: max_length)
end