#!/usr/bin/lua

local fs = require 'nixio.fs'
local site = require 'gluon.site_config'
local util = require 'luci.util'


local subst = {}

subst['%%v'] = util.trim(fs.readfile('/etc/openwrt_version'))
subst['%%n'], subst['%%S'] = util.exec('. /etc/openwrt_release; echo $DISTRIB_CODENAME; echo $DISTRIB_TARGET'):match('([^\n]*)\n([^\n]*)')
subst['%%GS'] = site.site_code
subst['%%GV'] = util.trim(fs.readfile('/lib/gluon/gluon-version'))
subst['%%GR'] = util.trim(fs.readfile('/lib/gluon/release'))

function replace_patterns(url)
  for k, v in pairs(subst) do
    url = url:gsub(k, v)
  end

  return url
end


if site.opkg then
  if site.opkg.openwrt then
    local url = replace_patterns(site.opkg.openwrt)
    local f = io.open('/etc/opkg/distfeeds.conf', 'w')

    for _, v in ipairs(__GLUON_OPENWRT_FEEDS__) do
      f:write(replace_patterns(string.format('src/gz %%n_%s %s/%s\n', v, site.opkg.openwrt, v)))
    end

    f:close()
  end

  if site.opkg.extra and next(site.opkg.extra) then
    local f = io.open('/etc/opkg/gluon.conf', 'w')

    for k, v in pairs(site.opkg.extra) do
      f:write(string.format('src/gz %s %s\n', k, replace_patterns(v)))
    end

    f:close()

  else
    os.remove('/etc/opkg/gluon.conf')
  end
end