var crypto = require('crypto')

var syrup = require('stf-syrup')

var logger = require('../../../util/logger')
var wire = require('../../../wire')
var wireutil = require('../../../wire/util')

module.exports = syrup.serial()
  .dependency(require('../support/sub'))
  .dependency(require('../support/push'))
  .dependency(require('../support/router'))
  .dependency(require('./identity'))
  .define(function(options, sub, push, router, identity) {
    var log = logger.createLogger('device:plugins:solo')

    // The channel should keep the same value between restarts, so that
    // having the client side up to date all the time is not horribly painful.
    function makeChannelId() {
      var hash = crypto.createHash('sha1')
      hash.update(options.serial)
      return hash.digest('base64')
    }

    var channel = makeChannelId()

    log.info('Subscribing to permanent channel "%s"', channel)
    sub.subscribe(channel)

    router.on(wire.ProbeMessage, function() {
      push.send([
        wireutil.global
      , wireutil.envelope(new wire.DeviceIdentityMessage(
          options.serial
        , identity.platform
        , identity.manufacturer
        , identity.operator
        , identity.model
        , identity.version
        , identity.abi
        , identity.sdk
        , new wire.DeviceDisplayMessage(identity.display)
        , new wire.DevicePhoneMessage(identity.phone)
        , identity.product
        ))
      ])
    })

    return {
      channel: channel
    , poke: function() {
        push.send([
          wireutil.global
        , wireutil.envelope(new wire.DevicePokeMessage(
            options.serial
          , channel
          ))
        ])
      }
    }
  })