#!/usr/bin/lua

function getConfig()

  local uci=require("uci")
  local cur=uci.cursor()
  local config="weathermon"

  web_url  = cur.get(config,"web","url")
  web_user = cur.get(config,"web","user")
  web_pass = cur.get(config,"web","password")
  web_devid = cur.get(config,"web","devid")

  web_iface = cur.get(config,"web","iface")
  
  if web_iface then
    io.input("/sys/class/net/"..web_iface.."/address")
  else
    io.input("/sys/class/net/eth0/address")
  end

  mac = io.read("*line")
  mac = mac:gsub(":","")
  mac = mac:upper()

  web_devid = web_devid or mac
  logging = cur.get(config,"logging","enabled") 

  serial_port = cur.get(config,"serial","port")
  serial_baud = cur.get(config,"serial","baud")

  command = "stty -F  "..serial_port.." "..serial_baud
  os.execute(command)

end

require "socket"

function sleep(sec)
  socket.select(nil, nil, sec)
end

function splitStr(str,char)

  local res = {}
  local idx = 1


  while str:len()>0 do
    pos = str:find(char); 
    if pos == nil then
      res[idx]=str
      str=""
    else
      res[idx]=str:sub(1,pos-1)
      idx=idx+1
      str=str:sub(pos+1)
    end
  end

  return res

end

function printLog(str)
  print(str)
  if logging=="on" then
    os.execute("logger -t weathermon "..str)
  end 
end

function submitValue(type,id,param,val)

  url = web_url.."?stype="..type.."&sid="..id.."&param="..param.."&value="..val

  command = "curl"

  if web_iface then
    command = command.." --interface "..web_iface
  end

  if web_user then
    command = command.." -u "..web_user..":"..web_pass
  end

  command = command.." \""..url.."\""

  print(command)
  os.execute(command)
  print("")

end

function processLine(str)

  msg=splitStr(line,':')
  msg_type=msg[1] or nil
  msg_body=msg[2] or nil
  if msg_type=="STATUS" then
    printLog("Status: "..msg_body)
  elseif msg_type=="ERROR" then
    printLog("Error: "..msg_body)  
  elseif msg_type=="SENSOR" then
    printLog("SENSOR: "..msg_body)  
    sens = splitStr(msg_body,",")
    sensor = {}
    idx = 1
    sensor_type = nil
    sensor_id = web_devid
    for i,rec in ipairs(sens) do
      recrd=splitStr(rec,'=')
      key=recrd[1] or nil
      value=recrd[2] or nil
      if value then
        if key=="TYPE" then
          sensor_type=value
        elseif key=="ID" then
          sensor_id=value
        else
          sensor[key]=value
        end
      end
    end
    for k,v in pairs(sensor) do
      printLog("Type = "..sensor_type..", ID = "..sensor_id..", Param = "..k..", Value = "..v)
      submitValue(sensor_type,sensor_id,k,v)
    end
  end

end

getConfig()

serialin=io.open(serial_port,"r")
while 1 do
  line=serialin:read()
  print(line)
  processLine(line)
end