function panic(reason)
  print("PANIC: "..reason)
  -- This will trigger a restart, but not immediately
  node.restart()
end

local P = {}

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

local function on_cmd(cmd, args)
  if not cmd then
    return
  end

  print("on_cmd: '"..cmd.."', #args="..tostring(table.getn(args)))
  for k, v in pairs(args) do
    print(k.."="..tostring(v))
  end

  if cmd == "reset" then
  print("ok")
    panic("Reset requested")
  elseif cmd == "wlan" then
    local ssid = args.ssid password = args.password

    if args.ssid then
      wifi.sta.config(args.ssid, args.password, 1)
    end
    ssid, password, bssid_set, bssid = wifi.sta.getconfig()
    print("ok ssid="..(ssid or ''))
  elseif cmd == "network" then
    local ip = args.ip nm = args.netmask gw = args.gateway

    if args.ip then
      wifi.sta.setip({ip=ip, netmask=nm, gateway=gw})
    end

    ip, nm, gw = wifi.sta.getip()
    print("ok ip="..(ip or '').." netmask="..(nm or '').." gateway="..(gw or ''))
  elseif cmd == "set-property" then
    local id = args.id
    if not id then
      print("fail status=missing-id")
    else
      local name_path = id.."/name"
      mq.subscribe(name_path, function() print('message on '..path) end)

      local description_path = id.."/description"
      mq.subscribe(description_path, function() print('message on '..path) end)

      if args.value then
        local path = id.."/value"
        mq.publish(path, args.value)
      end
      if args.name then
        mq.publish(name_path, args.name)
      end
      if args.description then
        mq.publish(description_path, args.description)
      end
    end
  elseif cmd == "publish" then
--    print("Publishing, topic="..tostring(cmd.topic)..", payload="..tostring(cmd.payload))
    ok, msg = mq.publish(cmd.topic, cmd.payload)
    if ok then
      print("ok status="..msg)
    else
      print("failed status="..msg)
    end
  else
    print("failed status=unknown-command")
  end
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 mac = wifi.sta.getmac()
  local client_id = "esp8266-"..mac
  mq.init(timers.mqtt, mac, client_id)

  inter.init(on_cmd)

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

--  local majorVer, minorVer, devVer, chipId, flashId, flashSize, flashMode, flashSpeed, buildDate = node.info()
--  payload = '{"version": "'..majorVer..'.'..minorVer..'.'..devVer..'", "chipId":'..chipId..', "flashId":'..flashId..', "flashSize":'..flashSize..', "flashMode":'..flashMode..', "flashSpeed":'..flashSpeed
--
--  if buildDate then
--    payload = payload..', "buildDate": "'..buildDate..'"'
--  end
--
--  if node.info_versions then
--    major, minor, dev, buildDate, sdkVersion = node.info_versions()
--    payload = payload..'", versions": {"major": '..major..', "minor": '..minor..', "dev": '..dev..', "buildDate": "'..buildDate..'", "sdk": "'..sdkVersion..'"}'
--  end
--  payload = payload.."}"
--  P.publish("firmware", payload)

  print("init done")
end

return P