class Faye::WebSocket

def self.determine_url(env)
  scheme = secure_request?(env) ? 'wss:' : 'ws:'
  "#{ scheme }//#{ env['HTTP_HOST'] }#{ env['REQUEST_URI'] }"
end

def self.ensure_reactor_running
  Thread.new { EventMachine.run } unless EventMachine.reactor_running?
  Thread.pass until EventMachine.reactor_running?
end

def self.load_adapter(backend)
  const = Kernel.const_get(ADAPTERS[backend]) rescue nil
  require(backend) unless const
  path = File.expand_path("../adapters/#{backend}.rb", __FILE__)
  require(path) if File.file?(path)
end

def self.secure_request?(env)
  return true if env['HTTPS'] == 'on'
  return true if env['HTTP_X_FORWARDED_SSL'] == 'on'
  return true if env['HTTP_X_FORWARDED_SCHEME'] == 'https'
  return true if env['HTTP_X_FORWARDED_PROTO'] == 'https'
  return true if env['rack.url_scheme'] == 'https'
  return false
end

def self.websocket?(env)
  ::WebSocket::Driver.websocket?(env)
end

def initialize(env, protocols = nil, options = {})
  WebSocket.ensure_reactor_running
  @env = env
  @url = WebSocket.determine_url(@env)
  super(options) { ::WebSocket::Driver.rack(self, :max_length => options[:max_length], :protocols => protocols) }
  @stream = Stream.new(self)
  if callback = @env['async.callback']
    callback.call([101, {}, @stream])
  end
end

def rack_response
  start_driver
  [ -1, {}, [] ]
end

def start_driver
  return if @driver.nil? || @driver_started
  @driver_started = true
  EventMachine.schedule { @driver.start }
end