-- Copyright 2017-2018 Dirk Brenken (dev@brenken.org)
-- This is free software, licensed under the Apache License, Version 2.0

local fs       = require("nixio.fs")
local uci      = require("luci.model.uci").cursor()
local util     = require("luci.util")
local nw       = require("luci.model.network").init()
local fw       = require("luci.model.firewall").init()
local dump     = util.ubus("network.interface", "dump", {})
local trmiface = uci:get("travelmate", "global", "trm_iface") or "trm_wwan"
local uplink   = uci:get("network", trmiface) or ""

m = Map("travelmate", translate("Travelmate"),
	translate("Configuration of the travelmate package to to enable travel router functionality. ")
	.. translatef("For further information "
	.. "<a href=\"%s\" target=\"_blank\">"
	.. "see online documentation</a>", "https://github.com/openwrt/packages/blob/master/net/travelmate/files/README.md"))
m:chain("network")
m:chain("firewall")

function m.on_apply(self)
	luci.sys.call("env -i /etc/init.d/travelmate restart >/dev/null 2>&1")
end

-- Interface Wizard

if uplink == "" then
	ds = m:section(NamedSection, "global", "travelmate", translate("Interface Wizard"))
	o = ds:option(Value, "trm_iface", translate("Create Uplink interface"),
		translate("Create a new wireless wan uplink interface, configure it to use dhcp and ")
		.. translate("add it to the wan zone of the firewall. ")
		.. translate("This step has only to be done once."))
	o.datatype = "and(uciname,rangelength(3,15))"
	o.default = trmiface
	o.rmempty = false

	function o.validate(self, value)
		if value then
			local nwnet = nw:get_network(value)
			local zone  = fw:get_zone("wan")
			local fwnet = fw:get_zone_by_network(value)
			if not nwnet then
				nwnet = nw:add_network(value, { proto = "dhcp" })
			end
			if zone and not fwnet then
				fwnet = zone:add_network(value)
			end
		end
		return value
	end
	return m
end

-- Main travelmate options

s = m:section(NamedSection, "global", "travelmate")

o1 = s:option(Flag, "trm_enabled", translate("Enable travelmate"))
o1.default = o1.disabled
o1.rmempty = false

o2 = s:option(Flag, "trm_captive", translate("Captive Portal Detection"),
	translate("Check the internet availability, log captive portal redirections and keep the uplink connection 'alive'."))
o2.default = o2.enabled
o2.rmempty = false

o3 = s:option(ListValue, "trm_iface", translate("Uplink / Trigger interface"),
	translate("Name of the used uplink interface."))
if dump then
	local i, v
	for i, v in ipairs(dump.interface) do
		if v.interface ~= "loopback" and v.interface ~= "lan" then
			o3:value(v.interface)
		end
	end
end
o3.default = trmiface
o3.rmempty = false

if fs.access("/usr/bin/qrencode") then
	btn = s:option(Button, "btn", translate("View AP QR-Codes"),
		translate("Connect your Android or iOS devices to your router's WiFi using the shown QR code."))
	btn.inputtitle = translate("QR-Codes")
	btn.inputstyle = "apply"
	btn.disabled = false

	function btn.write()
		luci.http.redirect(luci.dispatcher.build_url("admin", "services", "travelmate", "apqr"))
	end
end

-- Runtime information

ds = s:option(DummyValue, "_dummy")
ds.template = "travelmate/runtime"

-- Extra options

e = m:section(NamedSection, "global", "travelmate", translate("Extra options"),
translate("Options for further tweaking in case the defaults are not suitable for you."))

e1 = e:option(Flag, "trm_debug", translate("Enable verbose debug logging"))
e1.default = e1.disabled
e1.rmempty = false

e2 = e:option(Value, "trm_radio", translate("Radio selection"),
	translate("Restrict travelmate to a dedicated radio, e.g. 'radio0'."))
e2.datatype = "and(uciname,rangelength(6,6))"
e2.rmempty = true

e3 = e:option(Value, "trm_triggerdelay", translate("Trigger Delay"),
	translate("Additional trigger delay in seconds before travelmate processing begins."))
e3.datatype = "range(1,60)"
e3.default = 2
e3.rmempty = false

e4 = e:option(Value, "trm_maxretry", translate("Connection Limit"),
	translate("Retry limit to connect to an uplink."))
e4.default = 3
e4.datatype = "range(1,10)"
e4.rmempty = false

e5 = e:option(Value, "trm_minquality", translate("Signal Quality Threshold"),
	translate("Minimum signal quality threshold as percent for conditional uplink (dis-) connections."))
e5.default = 35
e5.datatype = "range(20,80)"
e5.rmempty = false

e6 = e:option(Value, "trm_maxwait", translate("Interface Timeout"),
	translate("How long should travelmate wait for a successful wlan uplink connection."))
e6.default = 30
e6.datatype = "range(20,40)"
e6.rmempty = false

e7 = e:option(Value, "trm_timeout", translate("Overall Timeout"),
	translate("Overall retry timeout in seconds."))
e7.default = 60
e7.datatype = "range(30,300)"
e7.rmempty = false

return m
