-- 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 json     = require("luci.jsonc")
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 trminput = uci.get("travelmate", "global", "trm_rtfile") or "/tmp/trm_runtime.json"
local uplink   = uci.get("network", trmiface) or ""
local parse    = json.parse(fs.readfile(trminput) 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"))

function m.on_after_commit(self)
	luci.sys.call("env -i /etc/init.d/travelmate restart >/dev/null 2>&1")
	luci.http.redirect(luci.dispatcher.build_url("admin", "services", "travelmate"))
end

-- Interface Wizard

if uplink == "" then
	ds = m:section(NamedSection, "global", "travelmate", translate("Interface Wizard"))

	o = ds:option(Value, "", translate("Uplink interface"))
	o.datatype = "and(uciname,rangelength(3,15))"
	o.default = trmiface
	o.rmempty = false

	btn = ds:option(Button, "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. This step has only to be done once."))
	btn.inputtitle = translate("Add Interface")
	btn.inputstyle = "apply"
	btn.disabled = false

	function btn.write(self, section)
		local iface = o:formvalue(section)
		if iface then
			uci:set("travelmate", section, "trm_iface", iface)
			uci:save("travelmate")
			uci:commit("travelmate")
			local net = nw:add_network(iface, { proto = "dhcp" })
			if net then
				nw:save("network")
				nw:commit("network")
				local zone = fw:get_zone_by_network("wan")
				if zone then
					zone:add_network(iface)
					fw:save("firewall")
					fw:commit("firewall")
				end
			end
			luci.sys.call("env -i /bin/ubus call network reload >/dev/null 2>&1")
		end
		luci.http.redirect(luci.dispatcher.build_url("admin", "services", "travelmate"))
	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_automatic", translate("Enable 'automatic' mode"),
	translate("Keep travelmate in an active state. Check every n seconds the connection status, i.e. the uplink availability."))
o2.default = o2.enabled
o2.rmempty = false

o3 = s:option(Flag, "trm_captive", translate("Captive Portal Detection"),
	translate("Check the internet availability, log captive portal redirections and keep the uplink connection 'alive'."))
o3.default = o3.enabled
o3.rmempty = false

o4 = 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
			o4:value(v.interface)
		end
	end
end
o4.default = trmiface
o4.rmempty = false

o5 = s:option(Value, "trm_triggerdelay", translate("Trigger Delay"),
	translate("Additional trigger delay in seconds before travelmate processing begins."))
o5.datatype = "range(1,60)"
o5.default = 2
o5.rmempty = false

btn = s:option(Button, "", translate("Manual Rescan"),
	translate("Force a manual uplink rescan / reconnect in 'trigger' mode."))
btn:depends("trm_automatic", "")
btn.inputtitle = translate("Rescan")
btn.inputstyle = "find"
btn.disabled = false

function btn.write()
	luci.sys.call("env -i /etc/init.d/travelmate start >/dev/null 2>&1")
	luci.http.redirect(luci.dispatcher.build_url("admin", "services", "travelmate"))
end

-- Runtime information

ds = m:section(NamedSection, "global", "travelmate", translate("Runtime Information"))

dv1 = ds:option(DummyValue, "status", translate("Travelmate Status (Quality)"))
dv1.template = "travelmate/runtime"
if parse ~= nil then
	dv1.value = parse.data.travelmate_status or translate("n/a")
else
	dv1.value = translate("n/a")
end

dv2 = ds:option(DummyValue, "travelmate_version", translate("Travelmate Version"))
dv2.template = "travelmate/runtime"
if parse ~= nil then
	dv2.value = parse.data.travelmate_version or translate("n/a")
else
	dv2.value = translate("n/a")
end

dv3 = ds:option(DummyValue, "station_id", translate("Station ID (SSID/BSSID)"))
dv3.template = "travelmate/runtime"
if parse ~= nil then
	dv3.value = parse.data.station_id or translate("n/a")
else
	dv3.value = translate("n/a")
end

dv4 = ds:option(DummyValue, "station_interface", translate("Station Interface"))
dv4.template = "travelmate/runtime"
if parse ~= nil then
	dv4.value = parse.data.station_interface or translate("n/a")
else
	dv4.value = translate("n/a")
end

dv5 = ds:option(DummyValue, "station_radio", translate("Station Radio"))
dv5.template = "travelmate/runtime"
if parse ~= nil then
	dv5.value = parse.data.station_radio or translate("n/a")
else
	dv5.value = translate("n/a")
end

dv6 = ds:option(DummyValue, "last_rundate", translate("Last rundate"))
dv6.template = "travelmate/runtime"
if parse ~= nil then
	dv6.value = parse.data.last_rundate or translate("n/a")
else
	dv6.value = translate("n/a")
end

-- 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_maxretry", translate("Connection Limit"),
	translate("Retry limit to connect to an uplink. ")
	.. translate("To disable this feature set it to '0' which means unlimited retries."))
e3.default = 3
e3.datatype = "range(0,30)"
e3.rmempty = false

e4 = e:option(Value, "trm_minquality", translate("Signal Quality Threshold"),
	translate("Minimum signal quality threshold as percent for conditional uplink (dis-) connections."))
e4.default = 30
e4.datatype = "range(0,100)"
e4.rmempty = false

e5 = e:option(Value, "trm_maxwait", translate("Interface Timeout"),
	translate("How long should travelmate wait for a successful wlan interface reload."))
e5.default = 30
e5.datatype = "range(5,60)"
e5.rmempty = false

e6 = e:option(Value, "trm_timeout", translate("Overall Timeout"),
	translate("Timeout in seconds between retries in 'automatic' mode."))
e6.default = 60
e6.datatype = "range(60,300)"
e6.rmempty = false

return m