local json = require 'luci.json'
local util = require 'luci.util'
local fs = require 'nixio.fs'
local iwinfo = require 'iwinfo'

function neighbours(iface)
  local stations = {}
  for k, v in pairs(iface.iw.assoclist(iface.ifname)) do
    stations[k:lower()] = { signal = v.signal
                          , noise = v.noise
                          , inactive = v.inactive
                          }
  end

  return stations
end

function interfaces()
  local interfaces = {}
  for _, line in ipairs(util.split(util.exec('batctl if'))) do
    ifname = line:match('^(.-): active')
    if ifname ~= nil then
      pcall(function()
        local address = util.trim(fs.readfile('/sys/class/net/' .. ifname .. '/address'))
        local wifitype = iwinfo.type(ifname)
        if wifitype ~= nil then
          interfaces[address] = { ifname = ifname, iw = iwinfo[wifitype] }
        end
      end)
    end
  end

  return interfaces
end

local wifi = {}
for address, iface in pairs(interfaces()) do
  wifi[address] = { neighbours = neighbours(iface) }
end

return wifi