# Abstraction of the concrete message queue system used
# Examples: AMQP, MQTT
class MessagingSystem
  constructor: (address, options) ->

  ## Broker connection management
  connect: (callback) ->
    throw new Error 'Not Implemented'
  disconnect: (callback) ->
    throw new Error 'Not Implemented'

  ## Manipulating queues
  # @type: inqueue|outqueue
  createQueue: (type, queueName, callback) ->
    throw new Error 'Not Implemented'
  removeQueue: (type, queueName, callback) ->
    throw new Error 'Not Implemented'

  ## Sending/Receiving messages
  # queueName must be created beforehand, and be of correct type
  sendToQueue: (queueName, message, callback) ->
    throw new Error 'Not Implemented'
  # handler must call ackMessage() on succesful processing of a message
  subscribeToQueue: (queueName, handler, callback) ->
    throw new Error 'Not Implemented'

  ## ACK/NACK messages
  ackMessage: (message) ->
    throw new Error 'Not Implemented'
  nackMessage: (message) ->
    throw new Error 'Not Implemented'

class MessagingClient extends MessagingSystem

  # Participant registration
  registerParticipant: (part) ->
    throw new Error 'Not Implemente'

exports.MessagingClient = MessagingClient

class MessageBroker extends MessagingSystem

  bindQueue: (from, to, callback) ->
    throw new Error 'Not Implemented'
  unbindQueue: (from, to, callback) ->
    throw new Error 'Not Implemented'
  listBindings: (from, callback) ->
    throw new Error 'Not Implemented'

  # Participant registration
  subscribeParticipantChange: (handler) ->
    throw new Error 'Not Implemented'

exports.MessageBroker = MessageBroker