#!/opt/lnxall_app/bin/lua

-- Created by jiaqiang.ye@lnxall.com
-- Blink LED when no gateway SN found

local bit32 = require 'bit32'
local posix = require 'posix'
local invoker = require 'invoker'

local function find_gwsn()
	local okay, output = invoker.invoke(invoker.OUTPUT, "factory", "get")
	if okay ~= 0 or type(output) ~= "string" then return nil end
	return string.match(output, "SN=([^\r\n]+)")
end

local function get_leds()
	-- LEDs for RK3568
	local leds = { [1] = "/sys/class/leds/run/brightness", [2] = "/sys/class/leds/net/brightness" }
	return leds, 1
end

local function blink_leds(leds, val)
	local wval = string.format("%d\n", val)
	for _, led in ipairs(leds) do
		local lp = io.open(led, "wb")
		if lp then
			lp:write(wval)
			lp:close()
		end
	end
end

local function mainfunc()
	local gwsn = nil
	local leds, maxval = get_leds()

	local bcount = 0
	while true do
		gwsn = find_gwsn()
		if gwsn then
			io.stdout:write(string.format("Gateway SN found: %s, Exiting\n", gwsn))
			io.stdout:flush()
			break
		end

		if bit32.band(bcount, 0x1) == 0 then
			blink_leds(leds, 0)
		else
			blink_leds(leds, maxval)
		end

		bcount = bcount + 1
		invoker.waitsec(2)
	end
end

invoker.waitsec(60) -- delay 1 minutes
posix.setenv("PATH", "/opt/lnxall_app/bin:/usr/local/bin:/usr/bin:/usr/sbin:/bin:/sbin", 1)
mainfunc()