class Rack::Handler::Thin

def self.run(app, **options)
  environment  = ENV['RACK_ENV'] || 'development'
  default_host = environment == 'development' ? 'localhost' : '0.0.0.0'
  host = options.delete(:Host) || default_host
  port = options.delete(:Port) || 8080
  args = [host, port, app, options]
  # Thin versions below 0.8.0 do not support additional options
  args.pop if ::Thin::VERSION::MAJOR < 1 && ::Thin::VERSION::MINOR < 8
  server = ::Thin::Server.new(*args)
  yield server if block_given?
  server.start
end

def self.valid_options
  environment  = ENV['RACK_ENV'] || 'development'
  default_host = environment == 'development' ? 'localhost' : '0.0.0.0'
  {
    "Host=HOST" => "Hostname to listen on (default: #{default_host})",
    "Port=PORT" => "Port to listen on (default: 8080)",
  }
end