-- import section
rfid = require("rfid")
indication = require("indication")
binascii = require("binascii")
--init section
reader = rfid.ComboReader({mfrc = {reset_pin = pio.GPIO25}, emmarine = {}})
leds = indication.Leds.new({RGB=true, ledPin=pio.GPIO32})
snd = indication.Sound.new(pio.GPIO21)
wdt_on = Settings.get("sys_wdt") == "on"
locker = rfid.OUT(pio.GPIO2)

local params = {
  addr = tonumber(Settings.get("net_dest")),
  port = uart.UART2,
  rxpin = 13,
  txpin = 14,
  rtspin = 12,
  baudrate = 115200,
  parity = uart.PARNONE,
  clear= true
}

modbus.rtu.init(params.addr, params.port, params.rxpin, params.txpin, params.rtspin, params.baudrate, params.parity, params.clear) 

local function webserver()
  local web_started = false
  local sn = cpu.getmac(0, 1)
  return function(num)
      if (web_started) then
        return
      end
      if string.sub(sn, -4) == string.format("%02X", num) then
        net.wf.setup(net.wf.mode.AP, Settings.get("net_ssid"), Settings.get("net_password"), net.wf.powersave.NONE, 4, false)
        net.wf.start()
        local pass = Settings.get("sys_pwd")
        pcall(dofile, "/romfs/backend.lua")
        net.service.tinyweb.start(80, "/romfs/www", (#pass > 0) and pass or nil, log, "backend", backendcb)
        web_started = true
      end
  end
end

if cpu.resetreason() == cpu.RESET_POWERON then 
    leds:start() 
    snd:start() 
end

--start main loop
reader.process({
    timeout_ms = 200,
    mode = rfid.MODE_LOOP,
    uidtype = rfid.UID_STR,
    em_uidtype = rfid.EM_UID_STR,
    wdt = wdt_on,
    checkfunc = function(uid, reader_type)
        local reg = 0
        if reader_type == "emmarine" then
            reg = 4
        end
        utable = binascii.unhexlify(uid)
        modbus.rtu.setregs8(reg, table.unpack(utable))
    end,
    waitfunc = function()
        local req = {addr = 0xf0, qty = 3, clear = true}
        local ret = modbus.rtu.getregs(req.addr, req.qty, req.clear)
        local action, web_pwd, new_addr = ret[1], ret[2], ret[3]
        if action == 1 then
            locker.open()
            leds:ok()
            snd:ok()
        elseif action == 2 then
            locker.close() 
            leds:err()
            snd:err()
        end
        if web_pwd ~= 0 then
            web_start(web_pwd)
        end
        if new_addr ~= 0 then
          Settings.set("net_dest", string.format("%d", new_addr & 0xff))
          os.exit()
        end
    end
})