-- Domoticz devices, both switch device and power device for each lamp
 lamps = { SWITCH_Entre_SwitchA  = "SWITCH_Entre_PowerA",
           SWITCH_Tvatt_SwitchA  = "SWITCH_Tvatt_PowerA",
           SWITCH_Altan_SwitchA  = "SWITCH_Altan_PowerA",
           SWITCH_Forrad_SwitchA = "SWITCH_Forrad_PowerA" }

--integer converts a float into an integer
function integer(x)
    return x<0 and math.ceil(x) or math.floor(x)
end

 -- deviceToTime returns a device time string in a format which can be used by the os.difftime function
function deviceToTime(time)
   return os.time { year  = string.sub(time, 1, 4),
                    month = string.sub(time, 6, 7),
                    day   = string.sub(time, 9, 10),
                    hour  = string.sub(time, 12, 13),
                    min   = string.sub(time, 15, 16),
                    sec   = string.sub(time, 18, 19) }
end

-- secsToClock return a string representing seconds as HH:MM:SS
function secsToClock(seconds)
   if ((seconds == 0) or (seconds == nil) ) then
      return "00:00:00"
   else
      days  = integer(seconds / (60 * 60 * 24))
      hours = integer((seconds - days * 60 * 60 * 24) / (60 * 60))
      mins  = integer((seconds - days * 60 * 60 * 24 - hours * 60 * 60) / 60)
      secs  = seconds - days * 60 * 60 * 24 - hours * 60 * 60 - mins * 60;

      if (days > 99) then
         return string.format("%03d:%02d:%02d:%02d (DDD:HH:MM:SS)", days, hours, mins, secs)
      elseif (days > 0) then
         return string.format("%02d:%02d:%02d:%02d (DD:HH:MM:SS)", days, hours, mins, secs)
      else
         return string.format("%02d:%02d:%02d (HH:MM:SS)", hours, mins, secs)
      end
   end
end

now = os.time()
temp = os.date("*t", now)

-- Calculate timestamp for this day mid night
today = os.time{year=temp['year'], month=temp['month'], day=temp['day'], hour=0, min=0}

sunRise = today + tonumber(timeofday['SunriseInMinutes']) * 60
sunSet  = today + tonumber(timeofday['SunsetInMinutes']) * 60

if (now < sunRise) then
	sunSet = sunSet - 24 * 60 * 60
elseif (now > sunSet) then
	sunRise = sunRise + 24 * 60 * 60
end

-- Get lamp state which is a dummy device switch
if (otherdevices['Switch_Utebelysning'] ~= nil) then
   lampState = otherdevices['Switch_Utebelysning']
else
   lampState = 'Unknown'
end

-- Get latest update for dummy device switch
if (otherdevices_lastupdate['Switch_Utebelysning'] ~= nil) then
   lampLastestUpdated = deviceToTime(otherdevices_lastupdate['Switch_Utebelysning'])
else
   lampLatestUpdated = now
end

commandArray = {}

if ((lampState == "Off") and (now > sunSet)) then
	commandArray['Switch_Utebelysning'] = "On"
	print ("Turning outdoor lamps on")
elseif ((lampState == "On") and (now > sunRise)) then
	commandArray['Switch_Utebelysning'] = "Off"
	print ("Turning outdoor lamps off")
elseif (lampState == "On") then
   -- Check if the lamps are on, comsuming power
	for deviceSwitch, DevicePower in pairs(lamps) do
		if (otherdevices_svalues[DevicePower] ~= nil) then
			watts = tonumber(otherdevices_svalues[DevicePower])
			if (watts < 1) then
				print("Turning on "..deviceSwitch)
				commandArray[deviceSwitch] = "On"
			else
				print(string.format("Device %s power is %d watts", deviceSwitch, watts))
			end
		else
			print("Cannot read power from device "..deviceSwitch)
		end
	end
elseif (lampState == "Off") then
   -- Check if the lamps are off, not comsuming power
	for deviceSwitch, DevicePower in pairs(lamps) do
		if (otherdevices_svalues[DevicePower] ~= nil) then
			watts = tonumber(otherdevices_svalues[DevicePower])
			if (watts > 1) then
				print("Turning off "..deviceSwitch)
				commandArray[deviceSwitch] = "Off"
			end
		else
			print("Cannot read power from device "..deviceSwitch)
		end
	end
end
return commandArray