var events = require('events')
var util = require('util')

var wire = require('./')
var log = require('../util/logger').createLogger('wire:router')

function Router() {
  if (!(this instanceof Router)) {
    return new Router()
  }

  events.EventEmitter.call(this)
}

util.inherits(Router, events.EventEmitter)

Router.prototype.handler = function() {
  return function(channel, data) {
    var wrapper = wire.Envelope.decode(data)
      , type = wire.ReverseMessageType[wrapper.type]

    if (type) {
      this.emit(
        wrapper.type
      , channel
      , wire[type].decode(wrapper.message)
      , data
      )
    }
    else {
      log.warn(
        'Unknown message type "%d", perhaps we need an update?'
      , wrapper.type
      )
    }
  }.bind(this)
}

module.exports = Router