require 'rubygems'
require 'eventmachine'

require 'rest_fs/client'

require 'settings'
require 'server'

class CcgRunner < Gom::Remote::Entry

  Defaults = {
    :logfile => '-',
    :port => nil,
    :valve => :closed,
  }

  include OAttr
  oattr :incoming_osc_port, :device, :valve, :logfile

  def self.instance
    @@instance
  end

  def initialize path, options = {}
    @@instance = self
    @path = path
    @options = Defaults.merge(gnode @path).merge(options)
    puts "options: #{@options.inspect}"
    (Ccg::logger logfile)

    # FIXIT: legacy! pushing config values from GOM to global variable!!!
    STATION['port'] = Integer(incoming_osc_port)
    STATION['device'] = device
    STATION['rci_uri'] = device_rci_uri
    puts " -- STATION info: #{STATION.inspect}"

    @options[:valve] = valve.to_sym # type fixing the GOM string
    init_gnp
  end

  def device_rci_uri
    @device_rci_uri ||= connection.read "#{device}:rci_uri.txt"
  end

  def run
    #fill_settings
    port = Integer(incoming_osc_port)
    if port.nil?
      raise "NOT Starting servers since port cannot be determined"
    end

    Ccg.logger.info "Starting servers"
    EventMachine::threadpool_size = 20
    EventMachine::run do
      Ccg.logger.info "UdpServer (port: #{port}) ..."
      EventMachine::open_datagram_socket('0.0.0.0', port, UdpServer)
      # TODO place http server component for GNP callbacks here...
    end
  end

  private
  def init_gnp
    @sub = Subscription.new(
        "#{@path}:valve", :name => "ccg", :operations => [:update, :create]
    )
    @sub.callback = lambda { |*args| valve_update(*args) }
    connection.subscribe @sub
  end

  def valve_update _, attribute
    @options[:valve] = attribute["value"].to_sym
    puts " -- can-controls-valve now: #{valve}"
  end
end