/obj/machinery/atmospherics/unary/outlet_injector
	icon = 'icons/atmos/injector.dmi'
	icon_state = "map_injector"
	use_power = 1
	layer = 3

	name = "Air Injector"
	desc = "Has a valve and pump attached to it"

	var/on = 0
	var/injecting = 0

	var/volume_rate = 50

	var/frequency = 0
	var/id = null
	var/datum/radio_frequency/radio_connection

	level = 1

/obj/machinery/atmospherics/unary/outlet_injector/update_icon()
	if(!powered())
		icon_state = "off"
	else
		icon_state = "[on ? "on" : "off"]"

/obj/machinery/atmospherics/unary/outlet_injector/update_underlays()
	if(..())
		underlays.Cut()
		var/turf/T = get_turf(src)
		if(!istype(T))
			return
		add_underlay(T, node, dir)

/obj/machinery/atmospherics/unary/outlet_injector/power_change()
	var/old_stat = stat
	..()
	if(old_stat != stat)
		update_icon()

/obj/machinery/atmospherics/unary/outlet_injector/process()
	..()
	injecting = 0

	if(!on || stat & NOPOWER)
		return 0

	if(air_contents.temperature > 0)
		var/transfer_moles = (air_contents.return_pressure())*volume_rate/(air_contents.temperature * R_IDEAL_GAS_EQUATION)

		var/datum/gas_mixture/removed = air_contents.remove(transfer_moles)

		loc.assume_air(removed)

		if(network)
			network.update = 1

	return 1

/obj/machinery/atmospherics/unary/outlet_injector/proc/inject()
	if(on || injecting)
		return 0

	injecting = 1

	if(air_contents.temperature > 0)
		var/transfer_moles = (air_contents.return_pressure())*volume_rate/(air_contents.temperature * R_IDEAL_GAS_EQUATION)

		var/datum/gas_mixture/removed = air_contents.remove(transfer_moles)

		loc.assume_air(removed)

		if(network)
			network.update = 1

	flick("inject", src)

/obj/machinery/atmospherics/unary/outlet_injector/proc/set_frequency(new_frequency)
	radio_controller.remove_object(src, frequency)
	frequency = new_frequency
	if(frequency)
		radio_connection = radio_controller.add_object(src, frequency)

/obj/machinery/atmospherics/unary/outlet_injector/proc/broadcast_status()
	if(!radio_connection)
		return 0

	var/datum/signal/signal = new
	signal.transmission_method = 1 //radio signal
	signal.source = src

	signal.data = list(
		"tag" = id,
		"device" = "AO",
		"power" = on,
		"volume_rate" = volume_rate,
		"sigtype" = "status"
	 )

	radio_connection.post_signal(src, signal)

	return 1

/obj/machinery/atmospherics/unary/outlet_injector/initialize()
	..()

	set_frequency(frequency)

/obj/machinery/atmospherics/unary/outlet_injector/receive_signal(datum/signal/signal)
	if(!signal.data["tag"] || (signal.data["tag"] != id) || (signal.data["sigtype"]!="command"))
		return 0

	if(signal.data["power"])
		on = text2num(signal.data["power"])

	if(signal.data["power_toggle"])
		on = !on

	if(signal.data["inject"])
		spawn inject()
		return

	if(signal.data["set_volume_rate"])
		var/number = text2num(signal.data["set_volume_rate"])
		volume_rate = between(0, number, air_contents.volume)

	if(signal.data["status"])
		spawn(2)
			broadcast_status()
		return //do not update_icon

		//log_admin("DEBUG \[[world.timeofday]\]: outlet_injector/receive_signal: unknown command \"[signal.data["command"]]\"\n[signal.debug_print()]")
		//return
	spawn(2)
		broadcast_status()
	update_icon()

/obj/machinery/atmospherics/unary/outlet_injector/hide(var/i)
	update_underlays()