Yogstation/code/modules/atmospherics/machinery/components/binary_devices/volume_pump.dm

/*
Every cycle, the pump uses the air in air_in to try and make air_out the perfect pressure.

node1, air1, network1 correspond to input
node2, air2, network2 correspond to output

Thus, the two variables affect pump operation are set in New():
	air1.volume
		This is the volume of gas available to the pump that may be transfered to the output
	air2.volume
		Higher quantities of this cause more air to be perfected later
			but overall network volume is also increased as this increases...
*/

/obj/machinery/atmospherics/components/binary/volume_pump
	icon_state = "volpump_map"
	name = "volumetric gas pump"
	desc = "A pump that moves gas by volume."

	can_unwrench = TRUE

	var/on = FALSE
	var/transfer_rate = MAX_TRANSFER_RATE

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

	construction_type = /obj/item/pipe/directional
	pipe_state = "volumepump"

/obj/machinery/atmospherics/components/binary/volume_pump/Destroy()
	SSradio.remove_object(src,frequency)
	return ..()

/obj/machinery/atmospherics/components/binary/volume_pump/on
	on = TRUE

/obj/machinery/atmospherics/components/binary/volume_pump/update_icon_nopipes()
	if(!is_operational())
		icon_state = "volpump_off"
		return

	icon_state = "volpump_[on?"on":"off"]"

/obj/machinery/atmospherics/components/binary/volume_pump/process_atmos()
//	..()
	if(!on || !is_operational())
		return

	var/datum/gas_mixture/air1 = AIR1
	var/datum/gas_mixture/air2 = AIR2

// Pump mechanism just won't do anything if the pressure is too high/too low

	var/input_starting_pressure = air1.return_pressure()
	var/output_starting_pressure = air2.return_pressure()

	if((input_starting_pressure < 0.01) || (output_starting_pressure > 9000))
		return

	var/transfer_ratio = min(1, transfer_rate/air1.volume)

	var/datum/gas_mixture/removed = air1.remove_ratio(transfer_ratio)

	air2.merge(removed)

	update_parents()

/obj/machinery/atmospherics/components/binary/volume_pump/proc/set_frequency(new_frequency)
	SSradio.remove_object(src, frequency)
	frequency = new_frequency
	if(frequency)
		radio_connection = SSradio.add_object(src, frequency)

/obj/machinery/atmospherics/components/binary/volume_pump/proc/broadcast_status()
	if(!radio_connection)
		return

	var/datum/signal/signal = new(list(
		"tag" = id,
		"device" = "APV",
		"power" = on,
		"transfer_rate" = transfer_rate,
		"sigtype" = "status"
	))
	radio_connection.post_signal(src, signal)

/obj/machinery/atmospherics/components/binary/volume_pump/ui_interact(mob/user, ui_key = "main", datum/tgui/ui = null, force_open = FALSE, \
																		datum/tgui/master_ui = null, datum/ui_state/state = GLOB.default_state)
	ui = SStgui.try_update_ui(user, src, ui_key, ui, force_open)
	if(!ui)
		ui = new(user, src, ui_key, "atmos_pump", name, 310, 115, master_ui, state)
		ui.open()

/obj/machinery/atmospherics/components/binary/volume_pump/ui_data()
	var/data = list()
	data["on"] = on
	data["rate"] = round(transfer_rate)
	data["max_rate"] = round(MAX_TRANSFER_RATE)
	return data

/obj/machinery/atmospherics/components/binary/volume_pump/atmosinit()
	..()

	set_frequency(frequency)

/obj/machinery/atmospherics/components/binary/volume_pump/ui_act(action, params)
	if(..())
		return
	switch(action)
		if("power")
			on = !on
			investigate_log("was turned [on ? "on" : "off"] by [key_name(usr)]", INVESTIGATE_ATMOS)
			. = TRUE
		if("rate")
			var/rate = params["rate"]
			if(rate == "max")
				rate = MAX_TRANSFER_RATE
				. = TRUE
			else if(rate == "input")
				rate = input("New transfer rate (0-[MAX_TRANSFER_RATE] L/s):", name, transfer_rate) as num|null
				if(!isnull(rate) && !..())
					. = TRUE
			else if(text2num(rate) != null)
				rate = text2num(rate)
				. = TRUE
			if(.)
				transfer_rate = CLAMP(rate, 0, MAX_TRANSFER_RATE)
				investigate_log("was set to [transfer_rate] L/s by [key_name(usr)]", INVESTIGATE_ATMOS)
	update_icon()

/obj/machinery/atmospherics/components/binary/volume_pump/receive_signal(datum/signal/signal)
	if(!signal.data["tag"] || (signal.data["tag"] != id) || (signal.data["sigtype"]!="command"))
		return

	var/old_on = on //for logging

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

	if("power_toggle" in signal.data)
		on = !on

	if("set_transfer_rate" in signal.data)
		var/datum/gas_mixture/air1 = AIR1
		transfer_rate = CLAMP(text2num(signal.data["set_transfer_rate"]),0,air1.volume)

	if(on != old_on)
		investigate_log("was turned [on ? "on" : "off"] by a remote signal", INVESTIGATE_ATMOS)

	if("status" in signal.data)
		broadcast_status()
		return //do not update_icon

	broadcast_status()
	update_icon()

/obj/machinery/atmospherics/components/binary/volume_pump/power_change()
	..()
	update_icon()

/obj/machinery/atmospherics/components/binary/volume_pump/can_unwrench(mob/user)
	. = ..()
	if(. && on && is_operational())
		to_chat(user, "<span class='warning'>You cannot unwrench [src], turn it off first!</span>")
		return FALSE