class ZuoraConnect::Telegraf

def connect
  ZuoraConnect.logger.debug(self.format_metric_log('Telegraf','Need new connection')) if ZuoraConnect.configuration.telegraf_debug
  uri = URI.parse(ZuoraConnect.configuration.telegraf_endpoint)
  self.host = UDPSocket.new.tap do |socket|
    socket.connect uri.host, uri.port
  end
rescue => ex
  self.host = nil
  ZuoraConnect.logger.warn(self.format_metric_log('Telegraf', "Failed to connect: #{ex.class}")) if Rails.env.to_s != 'production'
end

def format_metric_log(message, dump = nil)
  message_color, dump_color = "1;91", "0;1"
  log_entry = "  \e[#{message_color}m#{message}\e[0m   "
  log_entry << "\e[#{dump_color}m%#{String === dump ? 's' : 'p'}\e[0m" % dump if dump
  if Rails.env == :development
    log_entry
  else
    [message, dump].compact.join(' - ')
  end
end

def initialize
  self.connect
end

def write(direction: 'Unknown', tags: {}, values: {})
  time = Benchmark.measure do |bench|
    # To avoid writing metrics from rspec tests
    if Rails.env.to_sym != :test
      app_instance = Thread.current[:appinstance].present? ? Thread.current[:appinstance].id : 0
      tags = { app_name: ZuoraObservability::Env.app_name, process_type: ZuoraObservability::Env.process_type, app_instance: app_instance, pod_name: ZuoraObservability::Env.pod_name}.merge(tags)
      if direction == :inbound
        if INBOUND_METRICS && !Thread.current[:inbound_metric].to_bool
          self.write_udp(series: INBOUND_METRICS_NAME, tags: tags, values: values)
          Thread.current[:inbound_metric] = true
        else
          return
        end
      elsif direction == :outbound
        self.write_udp(series: OUTBOUND_METRICS_NAME, tags: tags, values: values) if OUTBOUND_METRICS
      else
        self.write_udp(series: direction, tags: tags, values: values)
      end
    end
  end
  if ZuoraConnect.configuration.telegraf_debug
    ZuoraConnect.logger.debug(self.format_metric_log('Telegraf', tags.to_s))
    ZuoraConnect.logger.debug(self.format_metric_log('Telegraf', values.to_s))
    ZuoraConnect.logger.debug(self.format_metric_log('Telegraf', "Writing '#{direction.capitalize}': #{time.real.round(5)} ms"))
  end
end

def write_udp(series: '', tags: {}, values: {})
  return if !values.present?
  self.host.write InfluxDB::PointValue.new({series: series, tags: tags, values: values}).dump
rescue => ex
  self.connect
  ZuoraConnect.logger.warn(self.format_metric_log('Telegraf',"Failed to write udp: #{ex.class}")) if Rails.env.to_s != 'production'
end