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

local netmod = luci.model.network
local device = luci.util.class(netmod.interface)

netmod:register_pattern_virtual("^relay%-%w")

local proto = netmod:register_protocol("relay")

function proto.get_i18n(self)
	return luci.i18n.translate("Relay bridge")
end

function proto.ifname(self)
	return "relay-" .. self.sid
end

function proto.opkg_package(self)
	return "relayd"
end

function proto.is_installed(self)
	return nixio.fs.access("/etc/init.d/relayd")
end

function proto.is_floating(self)
	return true
end

function proto.is_virtual(self)
	return true
end

function proto.is_up(self)
	local iface = self:get_interface()
	return iface and iface:is_up() or false
end

function proto.get_interface(self)
	return device(self.sid, self)
end

function proto.get_interfaces(self)
	if not self.ifaces then
		local ifs = { }
		local _, net, dev

		for net in luci.util.imatch(self:_get("network")) do
			net = netmod:get_network(net)
			if net then
				dev = net:get_interface()
				if dev then
					ifs[dev:name()] = dev
				end
			end
		end

		for dev in luci.util.imatch(self:_get("ifname")) do
			dev = netmod:get_interface(dev)
			if dev then
				ifs[dev:name()] = dev
			end
		end

		self.ifaces = { }

		for _, dev in luci.util.kspairs(ifs) do
			self.ifaces[#self.ifaces+1] = dev
		end
	end

	return self.ifaces
end

function proto.uptime(self)
	local net
	local upt = 0
	for net in luci.util.imatch(self:_get("network")) do
		net = netmod:get_network(net)
		if net then
			upt = math.max(upt, net:uptime())
		end
	end
	return upt
end

function proto.errors(self)
	return nil
end


function device.__init__(self, ifname, network)
	self.ifname  = ifname
	self.network = network
end

function device.type(self)
	return "tunnel"
end

function device.is_up(self)
	if self.network then
		local _, dev
		for _, dev in ipairs(self.network:get_interfaces()) do
			if not dev:is_up() then
				return false
			end
		end
		return true
	end
	return false
end

function device._stat(self, what)
	local v = 0
	if self.network then
		local _, dev
		for _, dev in ipairs(self.network:get_interfaces()) do
			v = v + dev[what](dev)
		end
	end
	return v
end

function device.rx_bytes(self) return self:_stat("rx_bytes") end
function device.tx_bytes(self) return self:_stat("tx_bytes") end
function device.rx_packets(self) return self:_stat("rx_packets") end
function device.tx_packets(self) return self:_stat("tx_packets") end

function device.mac(self)
	if self.network then
		local _, dev
		for _, dev in ipairs(self.network:get_interfaces()) do
			return dev:mac()
		end
	end
end

function device.ipaddrs(self)
	local addrs = { }
	if self.network then
		addrs[1] = luci.ip.IPv4(self.network:_get("ipaddr"))
	end
	return addrs
end

function device.ip6addrs(self)
	return { }
end

function device.shortname(self)
	return "%s %q" % { luci.i18n.translate("Relay"), self.ifname }
end

function device.get_type_i18n(self)
	return luci.i18n.translate("Relay Bridge")
end