# frozen_string_literal: true
require 'cucumber/core/test/result'

module Cucumber
  module Core
    module Test
      class Timer
        def start
          @start_time = time_in_nanoseconds
          self
        end

        def duration
          Result::Duration.new(nsec)
        end

        def nsec
          time_in_nanoseconds - @start_time
        end

        def sec
          nsec / 10 ** 9.0
        end

        private

        def time_in_nanoseconds
          MonotonicTime.time_in_nanoseconds
        end

        module MonotonicTime
          module_function

          if defined?(Process::CLOCK_MONOTONIC)
            def time_in_nanoseconds
              Process.clock_gettime(Process::CLOCK_MONOTONIC, :nanosecond)
            end
          elsif (defined?(RUBY_ENGINE) ? RUBY_ENGINE : 'ruby') == 'jruby'
            def time_in_nanoseconds
              java.lang.System.nanoTime()
            end
          else
            def time_in_nanoseconds
              t = Time.now
              t.to_i * 10 ** 9 + t.nsec
            end
          end
        end
      end
    end
  end
end