#!/usr/bin/lua

local site = require 'gluon.site'
local uci = require('simple-uci').cursor()


for name, config in pairs(site.autoupdater.branches()) do
	uci:delete('autoupdater', name)
	uci:section('autoupdater', 'branch', name, {
		name = config.name,
		mirror = config.mirrors,
		good_signatures = config.good_signatures,
		pubkey = config.pubkeys,
	})
end

if not uci:get('autoupdater', 'settings') then
	local enabled = false
	local branch = site.autoupdater.branch()

	local f = io.open('/lib/gluon/autoupdater/default_branch')
	if f then
		enabled = true
		branch = f:read('*line')
		f:close()
	end

	uci:section('autoupdater', 'autoupdater', 'settings', {
		enabled = enabled,
		branch = branch,
	})
end

uci:set('autoupdater', 'settings', 'version_file', '/lib/gluon/release')

uci:save('autoupdater')


local urandom = io.open('/dev/urandom', 'r')
local seed1, seed2 = urandom:read(2):byte(1, 2)
math.randomseed(seed1*0x100 + seed2)
urandom:close()

-- Perform updates at a random time between 04:00 and 05:00, and once an hour
-- a fallback update (used after the regular updates haven't worked for
-- (priority+1) days after a firmware release, for example because the node
-- is always offline at night)
local minute = math.random(0, 59)

local f = io.open('/usr/lib/micron.d/autoupdater', 'w')
f:write(string.format('%i 4 * * * /usr/sbin/autoupdater\n', minute))
f:write(string.format('%i 0-3,5-23 * * * /usr/sbin/autoupdater --fallback\n', minute))
f:close()
