//Pinpointers are used to track atoms from a distance as long as they're on the same z-level. The captain and nuke ops have ones that track the nuclear authentication disk.
/obj/item/pinpointer
	name = "pinpointer"
	desc = "A handheld tracking device that locks onto certain signals."
	icon = 'icons/obj/device.dmi'
	icon_state = "pinpointer"
	flags_1 = CONDUCT_1
	slot_flags = ITEM_SLOT_BELT
	w_class = WEIGHT_CLASS_SMALL
	item_state = "electronic"
	lefthand_file = 'icons/mob/inhands/misc/devices_lefthand.dmi'
	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
	throw_speed = 3
	throw_range = 7
	materials = list(MAT_METAL = 500, MAT_GLASS = 250)
	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | ACID_PROOF
	var/active = FALSE
	var/atom/movable/target //The thing we're searching for
	var/minimum_range = 0 //at what range the pinpointer declares you to be at your destination
	var/alert = FALSE // TRUE to display things more seriously

/obj/item/pinpointer/Initialize()
	. = ..()
	GLOB.pinpointer_list += src

/obj/item/pinpointer/Destroy()
	STOP_PROCESSING(SSfastprocess, src)
	GLOB.pinpointer_list -= src
	target = null
	return ..()

/obj/item/pinpointer/attack_self(mob/living/user)
	toggle_on()
	user.visible_message("<span class='notice'>[user] [active ? "" : "de"]activates [user.p_their()] pinpointer.</span>", "<span class='notice'>You [active ? "" : "de"]activate your pinpointer.</span>")

/obj/item/pinpointer/proc/toggle_on()
	active = !active
	playsound(src, 'sound/items/screwdriver2.ogg', 50, 1)
	if(active)
		START_PROCESSING(SSfastprocess, src)
	else
		target = null
		STOP_PROCESSING(SSfastprocess, src)
	update_icon()

/obj/item/pinpointer/process()
	if(!active)
		return PROCESS_KILL
	scan_for_target()
	update_icon()

/obj/item/pinpointer/proc/scan_for_target()
	return

/obj/item/pinpointer/update_icon()
	cut_overlays()
	if(!active)
		return
	if(!target)
		add_overlay("pinon[alert ? "alert" : ""]null")
		return
	var/turf/here = get_turf(src)
	var/turf/there = get_turf(target)
	if(here.z != there.z)
		add_overlay("pinon[alert ? "alert" : ""]null")
		return
	if(get_dist_euclidian(here,there) <= minimum_range)
		add_overlay("pinon[alert ? "alert" : ""]direct")
	else
		setDir(get_dir(here, there))
		switch(get_dist(here, there))
			if(1 to 8)
				add_overlay("pinon[alert ? "alert" : "close"]")
			if(9 to 16)
				add_overlay("pinon[alert ? "alert" : "medium"]")
			if(16 to INFINITY)
				add_overlay("pinon[alert ? "alert" : "far"]")

/obj/item/pinpointer/crew // A replacement for the old crew monitoring consoles
	name = "crew pinpointer"
	desc = "A handheld tracking device that points to crew suit sensors."
	icon_state = "pinpointer_crew"
	custom_price = 150

/obj/item/pinpointer/crew/proc/trackable(mob/living/carbon/human/H)
	var/turf/here = get_turf(src)
	if((H.z == 0 || H.z == here.z) && istype(H.w_uniform, /obj/item/clothing/under))
		var/obj/item/clothing/under/U = H.w_uniform

		// Suit sensors must be on maximum.
		if(!U.has_sensor || U.sensor_mode < SENSOR_COORDS)
			return FALSE

		var/turf/there = get_turf(H)
		return (H.z != 0 || (there && there.z == here.z))

	return FALSE

/obj/item/pinpointer/crew/attack_self(mob/living/user)
	if(active)
		toggle_on()
		user.visible_message("<span class='notice'>[user] deactivates [user.p_their()] pinpointer.</span>", "<span class='notice'>You deactivate your pinpointer.</span>")
		return

	var/list/name_counts = list()
	var/list/names = list()

	for(var/mob/living/carbon/human/H in GLOB.carbon_list)
		if(!trackable(H))
			continue

		var/crewmember_name = "Unknown"
		if(H.wear_id)
			var/obj/item/card/id/I = H.wear_id.GetID()
			if(I && I.registered_name)
				crewmember_name = I.registered_name

		while(crewmember_name in name_counts)
			name_counts[crewmember_name]++
			crewmember_name = text("[] ([])", crewmember_name, name_counts[crewmember_name])
		names[crewmember_name] = H
		name_counts[crewmember_name] = 1

	if(!names.len)
		user.visible_message("<span class='notice'>[user]'s pinpointer fails to detect a signal.</span>", "<span class='notice'>Your pinpointer fails to detect a signal.</span>")
		return

	var/A = input(user, "Person to track", "Pinpoint") in names
	if(!A || QDELETED(src) || !user || !user.is_holding(src) || user.incapacitated())
		return

	target = names[A]
	toggle_on()
	user.visible_message("<span class='notice'>[user] activates [user.p_their()] pinpointer.</span>", "<span class='notice'>You activate your pinpointer.</span>")

/obj/item/pinpointer/crew/scan_for_target()
	if(target)
		if(ishuman(target))
			var/mob/living/carbon/human/H = target
			if(!trackable(H))
				target = null
	if(!target) //target can be set to null from above code, or elsewhere
		active = FALSE


/obj/item/pinpointer/pair
	name = "pair pinpointer"
	desc = "A handheld tracking device that locks onto its other half of the matching pair."
	var/other_pair

/obj/item/pinpointer/pair/Destroy()
	other_pair = null
	. = ..()

/obj/item/pinpointer/pair/scan_for_target()
	target = other_pair

/obj/item/pinpointer/pair/examine(mob/user)
	. = ..()
	if(!active || !target)
		return
	var/mob/mob_holder = get(target, /mob)
	if(istype(mob_holder))
		to_chat(user, "Its pair is being held by [mob_holder].")
		return

/obj/item/storage/box/pinpointer_pairs
	name = "pinpointer pair box"

/obj/item/storage/box/pinpointer_pairs/PopulateContents()
	var/obj/item/pinpointer/pair/A = new(src)
	var/obj/item/pinpointer/pair/B = new(src)

	A.other_pair = B
	B.other_pair = A