class Yodeler::Metric
  attr_reader :type, :value
  attr_reader :sample_rate, :tags, :prefix
  attr_reader :options

  def initialize(type, name, value, opts={})
    @type = type
    @name = name
    @value = value
    @prefix = opts.delete(:prefix)
    @sample_rate = opts.delete(:sample_rate)
    @options = opts
  end

  def name
    @prefix ? [@prefix, @name].join('.') : @name
  end

  # @return [Boolean] Should this metric be sampled
  def sample?
    @_sample ||= !(rand()> @sample_rate)
  end

  def to_hash
    hash = {
      name: name,
      type: @type,
      value: @value,
    }

    hash[:tags] = options[:tags] if options[:tags] && options[:tags].any?
    hash[:hostname] = options[:hostname] if options[:hostname]

    hash
  end
end