class RuboCop::Cop::MessageAnnotator

def annotate(message)
  message = "#{cop_name}: #{message}" if display_cop_names?
  message += " #{details}" if extra_details? && details
  if display_style_guide?
    links = urls.join(', ')
    message = "#{message} (#{links})"
  end
  message
end

def debug?
  options[:debug]
end

def details
  details = cop_config && cop_config['Details']
  details.nil? || details.empty? ? nil : details
end

def display_cop_names?
  return true if debug?
  return false if options[:display_cop_names] == false
  return true if options[:display_cop_names]
  return false if options[:format] == 'json'
  config.for_all_cops['DisplayCopNames']
end

def display_style_guide?
  (options[:display_style_guide] ||
   config.for_all_cops['DisplayStyleGuide']) &&
    !urls.empty?
end

def extra_details?
  options[:extra_details] || config.for_all_cops['ExtraDetails']
end

def initialize(config, cop_name, cop_config, options)
  @config = config
  @cop_name = cop_name
  @cop_config = cop_config || {}
  @options = options
end

def reference_urls
  urls = Array(cop_config['Reference'])
  urls.nil? || urls.empty? ? nil : urls.reject(&:empty?)
end

def style_guide_base_url
  department_name = cop_name.split('/').first
  config.for_department(department_name)['StyleGuideBaseURL'] ||
    config.for_all_cops['StyleGuideBaseURL']
end

def style_guide_url
  url = cop_config['StyleGuide']
  return nil if url.nil? || url.empty?
  self.class.style_guide_urls[url] ||= begin
    base_url = style_guide_base_url
    if base_url.nil? || base_url.empty?
      url
    else
      URI.join(base_url, url).to_s
    end
  end
end

def urls
  [style_guide_url, *reference_urls].compact
end