local m
local topic
local connected = false

function mq_connected(con)
  print("MQTT connected, con="..tostring(con))
end

function mq_disconnected(con)
  print("MQTT disconnected, con="..tostring(con))
  connected = false
end

function mq_client_connected(con)
  print("connected="..tostring(con))

  connected = true

  local majorVer, minorVer, devVer, chipId, flashId, flashSize, flashMode, flashSpeed = node.info()
  payload = "{version: '"..majorVer.."."..minorVer.."."..devVer.."', chipId:"..chipId..", flashId:"..flashId..", flashSize:"..flashSize..", flashMode:"..flashMode..", flashSpeed:"..flashSpeed.."}"
  mq_publish("firmware", payload)
end

function mq_init(client_id)
  print("MQTT: Configuring")

  topic = "/esp8266/"..client_id

  -- client id, keepalive, username, password
  m = mqtt.Client(client_id, 120)
  m:on("connect", mq_connected)

  m:on("offline", mq_disconnected)
  -- host, port, secure, auto_reconnect, function(client), ssl=8883
  m:connect("trygvis.io", 1883, 0, 0, mq_client_connected)

  print("MQTT: Configured")
end 

function mq_publish(path, payload)
  if connected then
    m:publish(topic.."/"..path, payload, 0, 0)
  end
end