-- Copyright 2011 Jo-Philipp Wich <jow@openwrt.org>
-- Licensed to the public under the Apache License 2.0.

local map, section, net = ...

local device, username, password
local ipv6, defaultroute, metric, peerdns, dns,
	  keepalive_failure, keepalive_interval, demand, mtu


device = section:taboption("general", Value, "device", translate("Modem device"))
device.rmempty = false

local device_suggestions = nixio.fs.glob("/dev/tty*S*")
	or nixio.fs.glob("/dev/tts/*")

if device_suggestions then
	local node
	for node in device_suggestions do
		device:value(node)
	end
end


username = section:taboption("general", Value, "username", translate("PAP/CHAP username"))


password = section:taboption("general", Value, "password", translate("PAP/CHAP password"))
password.password = true


if luci.model.network:has_ipv6() then
	ipv6 = section:taboption("advanced", ListValue, "ipv6",
		translate("Obtain IPv6-Address"),
		translate("Enable IPv6 negotiation on the PPP link"))
	ipv6:value("auto", translate("Automatic"))
	ipv6:value("0", translate("Disabled"))
	ipv6:value("1", translate("Manual"))
	ipv6.default = "auto"
end


defaultroute = section:taboption("advanced", Flag, "defaultroute",
	translate("Use default gateway"),
	translate("If unchecked, no default route is configured"))

defaultroute.default = defaultroute.enabled


metric = section:taboption("advanced", Value, "metric",
	translate("Use gateway metric"))

metric.placeholder = "0"
metric.datatype    = "uinteger"
metric:depends("defaultroute", defaultroute.enabled)


peerdns = section:taboption("advanced", Flag, "peerdns",
	translate("Use DNS servers advertised by peer"),
	translate("If unchecked, the advertised DNS server addresses are ignored"))

peerdns.default = peerdns.enabled


dns = section:taboption("advanced", DynamicList, "dns",
	translate("Use custom DNS servers"))

dns:depends("peerdns", "")
dns.datatype = "ipaddr"
dns.cast     = "string"


keepalive_failure = section:taboption("advanced", Value, "_keepalive_failure",
	translate("LCP echo failure threshold"),
	translate("Presume peer to be dead after given amount of LCP echo failures, use 0 to ignore failures"))

function keepalive_failure.cfgvalue(self, section)
	local v = m:get(section, "keepalive")
	if v and #v > 0 then
		return tonumber(v:match("^(%d+)[ ,]+%d+") or v)
	end
end

keepalive_failure.placeholder = "0"
keepalive_failure.datatype    = "uinteger"


keepalive_interval = section:taboption("advanced", Value, "_keepalive_interval",
	translate("LCP echo interval"),
	translate("Send LCP echo requests at the given interval in seconds, only effective in conjunction with failure threshold"))

function keepalive_interval.cfgvalue(self, section)
	local v = m:get(section, "keepalive")
	if v and #v > 0 then
		return tonumber(v:match("^%d+[ ,]+(%d+)"))
	end
end

function keepalive_interval.write(self, section, value)
	local f = tonumber(keepalive_failure:formvalue(section)) or 0
	local i = tonumber(value) or 5
	if i < 1 then i = 1 end
	if f > 0 then
		m:set(section, "keepalive", "%d %d" %{ f, i })
	else
		m:del(section, "keepalive")
	end
end

keepalive_interval.remove      = keepalive_interval.write
keepalive_failure.write        = keepalive_interval.write
keepalive_failure.remove       = keepalive_interval.write
keepalive_interval.placeholder = "5"
keepalive_interval.datatype    = "min(1)"


demand = section:taboption("advanced", Value, "demand",
	translate("Inactivity timeout"),
	translate("Close inactive connection after the given amount of seconds, use 0 to persist connection"))

demand.placeholder = "0"
demand.datatype    = "uinteger"


mtu = section:taboption("advanced", Value, "mtu", translate("Override MTU"))
mtu.placeholder = "1500"
mtu.datatype    = "max(9200)"