function panic(reason)
  print("PANIC: "..reason)
  -- This will trigger a restart, but not immediately
  node.restart()
  while true do
--    print("waiting for restart..")
--    tmr.delay(1 * 1000 * 1000)
  end
end

local P = {}

local inter = require('inter')
local mq = require('mq')

local function on_cmd(cmd, args)
  print("on_cmd: "..cmd)
  for k, v in pairs(args) do
    print(k.."="..tostring(v))
  end

  mq.publish("cmd", "cmd="..cmd)
end

local function read_cfg(name)
  local filename = "cfg-"..name
  if not file.open(filename, "r") then
    panic("Could not read configuration file: "..filename)
  end
  local value = file.readline()
  file.close()
  if value == nil or #value == 0 then
    panic("Empty configuration file: "..filename)
  end
  return string.sub(value, 1, -2)
end

local function print_status()
  print("System Status")
  print("Uptime   : "..tmr.time())
  print("Heap left: "..node.heap())
  ip, nm, gw = wifi.sta.getip()
  print("IP       : "..tostring(ip))
  print("Netmask  : "..tostring(nm))
  print("Gateway  : "..tostring(gw))
end

-- uart.setup(id, baud, databits, parity, stopbits, echo)
-- uart.setup(0, 115200, 8, 0, 1, 0)
-- uart.setup(0, 9600, 8, 0, 1, 0)

function P.main()
  local timers = {
    status = 0,
    inter = 1,
    mqtt = 2
  }

  local wlan_ssid = read_cfg("wlan-ssid")
  local wlan_password = read_cfg("wlan-password")
  print("Connecting to SSID: "..wlan_ssid)
  wifi.setmode(wifi.STATION)
  wifi.sta.config(wlan_ssid, wlan_password)

  local client_id = "esp8266-"..wifi.sta.getmac()
  mq.init(timers.mqtt, client_id)

  inter.init(on_cmd)

  tmr.alarm(timers.status, 10 * 1000, 1, print_status)

  print("init done")
end

return P