class Object

# File lib/puma/plugin/metrics.rb, line 7
def start(launcher)
  str = launcher.options[:metrics_url] || 'tcp://0.0.0.0:9393'

  require 'puma/metrics/app'

  app = Puma::Metrics::App.new launcher
  uri = URI.parse str

  metrics = Puma::Server.new app, launcher.events
  metrics.min_threads = 0
  metrics.max_threads = 1

  case uri.scheme
  when 'tcp'
    launcher.events.log "* Starting metrics server on #{str}"
    metrics.add_tcp_listener uri.host, uri.port
  else
    launcher.events.error "Invalid control URI: #{str}"
  end

  launcher.events.register(:state) do |state|
    if %i[halt restart stop].include?(state)
      # rubocop:disable Style/SoleNestedConditional
      metrics.stop(true) unless metrics.shutting_down?
      # rubocop:enable Style/SoleNestedConditional
    end
  end

  metrics.run
end