'use strict'
const spark = require('spark')
spark.on('login', function () {
  // If login is successful we get and accessToken,
  // we'll use that to call Spark API ListDevices
  var devicesPr = spark.listDevices()
  devicesPr.then(
    // We get an array with devices back and we list them
    function (devices) {
      console.log('API call List Devices: ', devices)
      // callback to be executed by each core
      var callback = function (err, data) {
        if (err) {
          console.log('An error occurred while getting core attrs:', err)
        } else {
          console.log('Core attr retrieved successfully:', data)
        }
      }
      // The function needs to be defined  in the firmware uploaded to the
      // the Spark core and registered to the Spark cloud, same thing we do
      // with variables. You pass along the name of the function and the params.
      spark.callFunction(devices[0].id, 'digitalwrite', 'D7:HIGH', callback)
      // Once you hvae a device/core instance you can use that to call functions on it.
      // The main difference between this and directly using the main `spark` instance is
      // that you no longer need to pass the id.
      var core = devices[0]
      setTimeout(function () {
        core.callFunction('digitalwrite', 'D7:LOW', callback)
      }, 5000)
      console.log('core: ', core)
    },
    function (err) {
      console.log('API call failed: ', err)
    }
)
})

// Login as usual
spark.login({ username: 'email@email.com', password: 'pass' })