#!/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'], subst['%%A'] = util.exec('. /etc/openwrt_release; echo "$DISTRIB_CODENAME"; echo "$DISTRIB_TARGET"; echo "$DISTRIB_ARCH"'):match('([^\n]*)\n([^\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


local prefix = subst['%%n'] .. '_'

local distfeeds = {}
for line in io.lines('/etc/opkg/distfeeds.conf') do
	table.insert(distfeeds, line)
end

local f = io.open('/etc/opkg/distfeeds.conf', 'w')

for _, line in ipairs(distfeeds) do
	local name = line:match('^src/gz%s' .. prefix .. '(%S+)%s')
	if name == 'core' then
		f:write('# ' .. line .. '\n')
	elseif name and site.opkg and site.opkg.lede then
		f:write(string.format('src/gz %s %s/%s\n', prefix .. name, replace_patterns(site.opkg.lede), name))
	else
		f:write(line .. '\n')
	end
end

f:close()

if site.opkg and 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