require 'open-uri'
require 'benchmark'

module Remon
  module Metrics
    class Http

      def initialize(url)
        @uri = URI.parse(url)
      end

      def status(read_timeout: 1, open_timeout: 1)
        status = nil
        time = Benchmark.realtime do
          status = get_status(read_timeout, open_timeout)
        end
        return time, status
      end

      private

      def get_status(read_timeout, open_timeout)
        @uri.open(read_timeout: read_timeout, open_timeout: open_timeout, redirect: false) do |f|
          f.status[0].to_i
        end
      rescue EOFError
        return 444
      rescue Errno::ECONNREFUSED
        return 502
      rescue Net::OpenTimeout
        return 504
      rescue Net::ReadTimeout
        return 504
      rescue OpenURI::HTTPRedirect => e
        return 301
      end

    end
  end
end