// Light Replacer (LR)
//
// ABOUT THE DEVICE
//
// This is a device supposedly to be used by Janitors and Janitor Cyborgs which will
// allow them to easily replace lights. This was mostly designed for Janitor Cyborgs since
// they don't have hands or a way to replace lightbulbs.
//
// HOW IT WORKS
//
// You attack a light fixture with it, if the light fixture is broken it will replace the
// light fixture with a working light; the broken light is then placed on the floor for the
// user to then pickup with a trash bag. If it's empty then it will just place a light in the fixture.
//
// HOW TO REFILL THE DEVICE
//
// It will need to be manually refilled with lights.
// If it's part of a robot module, it will charge when the Robot is inside a Recharge Station.
//
// EMAGGED FEATURES
//
// NOTICE: The Cyborg cannot use the emagged Light Replacer and the light's explosion was nerfed. It cannot create holes in the station anymore.
//
// I'm not sure everyone will react the emag's features so please say what your opinions are of it.
//
// When emagged it will rig every light it replaces, which will explode when the light is on.
// This is VERY noticable, even the device's name changes when you emag it so if anyone
// examines you when you're holding it in your hand, you will be discovered.
// It will also be very obvious who is setting all these lights off, since only Janitor Borgs and Janitors have easy
// access to them, and only one of them can emag their device.
//
// The explosion cannot insta-kill anyone with 30% or more health.

#define LIGHT_OK 0
#define LIGHT_EMPTY 1
#define LIGHT_BROKEN 2
#define LIGHT_BURNED 3


/obj/item/lightreplacer

	name = "light replacer"
	desc = "A device to automatically replace lights. Refill with broken or working light bulbs, or sheets of glass."

	icon = 'icons/obj/janitor.dmi'
	icon_state = "lightreplacer0"
	inhand_icon_state = "electronic"
	worn_icon_state = "light_replacer"
	lefthand_file = 'icons/mob/inhands/misc/devices_lefthand.dmi'
	righthand_file = 'icons/mob/inhands/misc/devices_righthand.dmi'
	w_class = WEIGHT_CLASS_SMALL
	flags_1 = CONDUCT_1
	slot_flags = ITEM_SLOT_BELT
	force = 8

	var/max_uses = 20
	var/uses = 10
	// How much to increase per each glass?
	var/increment = 5
	// How much to take from the glass?
	var/decrement = 1
	var/charge = 1

	// Eating used bulbs gives us bulb shards
	var/bulb_shards = 0
	// when we get this many shards, we get a free bulb.
	var/shards_required = 4

/obj/item/lightreplacer/examine(mob/user)
	. = ..()
	. += status_string()

/obj/item/lightreplacer/attackby(obj/item/W, mob/user, params)

	if(istype(W, /obj/item/stack/sheet/glass))
		var/obj/item/stack/sheet/glass/G = W
		if(uses >= max_uses)
			to_chat(user, span_warning("[src.name] is full."))
			return
		else if(G.use(decrement))
			AddUses(increment)
			to_chat(user, span_notice("You insert a piece of glass into \the [src.name]. You have [uses] light\s remaining."))
			return
		else
			to_chat(user, span_warning("You need one sheet of glass to replace lights!"))

	if(istype(W, /obj/item/shard))
		if(uses >= max_uses)
			to_chat(user, span_warning("\The [src] is full."))
			return
		if(!user.temporarilyRemoveItemFromInventory(W))
			return
		AddUses(round(increment*0.75))
		to_chat(user, span_notice("You insert a shard of glass into \the [src]. You have [uses] light\s remaining."))
		qdel(W)
		return

	if(istype(W, /obj/item/light))
		var/obj/item/light/L = W
		if(L.status == 0) // LIGHT OKAY
			if(uses < max_uses)
				if(!user.temporarilyRemoveItemFromInventory(W))
					return
				AddUses(1)
				qdel(L)
		else
			if(!user.temporarilyRemoveItemFromInventory(W))
				return
			to_chat(user, span_notice("You insert [L] into \the [src]."))
			AddShards(1, user)
			qdel(L)
		return

	if(istype(W, /obj/item/storage))
		var/obj/item/storage/S = W
		var/found_lightbulbs = FALSE
		var/replaced_something = TRUE

		for(var/obj/item/I in S.contents)
			if(istype(I, /obj/item/light))
				var/obj/item/light/L = I
				found_lightbulbs = TRUE
				if(src.uses >= max_uses)
					break
				if(L.status == LIGHT_OK)
					replaced_something = TRUE
					AddUses(1)
					qdel(L)

				else if(L.status == LIGHT_BROKEN || L.status == LIGHT_BURNED)
					replaced_something = TRUE
					AddShards(1, user)
					qdel(L)

		if(!found_lightbulbs)
			to_chat(user, span_warning("\The [S] contains no bulbs."))
			return

		if(!replaced_something && src.uses == max_uses)
			to_chat(user, span_warning("\The [src] is full!"))
			return

		to_chat(user, span_notice("You fill \the [src] with lights from \the [S]. " + status_string() + ""))

/obj/item/lightreplacer/emag_act()
	if(obj_flags & EMAGGED)
		return
	Emag()

/obj/item/lightreplacer/attack_self(mob/user)
	for(var/obj/machinery/light/target in user.loc)
		ReplaceLight(target, user)
	to_chat(user, status_string())

/obj/item/lightreplacer/update_icon_state()
	icon_state = "lightreplacer[(obj_flags & EMAGGED ? 1 : 0)]"
	return ..()

/obj/item/lightreplacer/proc/status_string()
	return "It has [uses] light\s remaining (plus [bulb_shards] fragment\s)."

/obj/item/lightreplacer/proc/Use(mob/user)
	playsound(src.loc, 'sound/machines/click.ogg', 50, TRUE)
	AddUses(-1)
	return 1

// Negative numbers will subtract
/obj/item/lightreplacer/proc/AddUses(amount = 1)
	uses = clamp(uses + amount, 0, max_uses)

/obj/item/lightreplacer/proc/AddShards(amount = 1, user)
	bulb_shards += amount
	var/new_bulbs = round(bulb_shards / shards_required)
	if(new_bulbs > 0)
		AddUses(new_bulbs)
	bulb_shards = bulb_shards % shards_required
	if(new_bulbs != 0)
		to_chat(user, span_notice("\The [src] fabricates a new bulb from the broken glass it has stored. It now has [uses] uses."))
		playsound(src.loc, 'sound/machines/ding.ogg', 50, TRUE)
	return new_bulbs

/obj/item/lightreplacer/proc/Charge(mob/user)
	charge += 1
	if(charge > 3)
		AddUses(1)
		charge = 1

/obj/item/lightreplacer/proc/ReplaceLight(obj/machinery/light/target, mob/living/U)

	if(target.status != LIGHT_OK)
		if(CanUse(U))
			if(!Use(U))
				return
			to_chat(U, span_notice("You replace \the [target.fitting] with \the [src]."))

			if(target.status != LIGHT_EMPTY)
				AddShards(1, U)
				target.status = LIGHT_EMPTY
				target.update()

			var/obj/item/light/L2 = new target.light_type()

			target.status = L2.status
			target.switchcount = L2.switchcount
			target.rigged = (obj_flags & EMAGGED ? 1 : 0)
			target.brightness = L2.brightness
			target.on = target.has_power()
			target.update()
			qdel(L2)

			if(target.on && target.rigged)
				target.explode()
			return

		else
			to_chat(U, span_warning("\The [src]'s refill light blinks red."))
			return
	else
		to_chat(U, span_warning("There is a working [target.fitting] already inserted!"))
		return

/obj/item/lightreplacer/proc/Emag()
	obj_flags ^= EMAGGED
	playsound(src.loc, "sparks", 100, TRUE, SHORT_RANGE_SOUND_EXTRARANGE)
	if(obj_flags & EMAGGED)
		name = "shortcircuited [initial(name)]"
	else
		name = initial(name)
	update_appearance()

/obj/item/lightreplacer/proc/CanUse(mob/living/user)
	src.add_fingerprint(user)
	if(uses > 0)
		return 1
	else
		return 0

/obj/item/lightreplacer/afterattack(atom/T, mob/U, proximity)
	. = ..()
	if(!proximity)
		return
	if(!isturf(T))
		return

	var/used = FALSE
	for(var/atom/A in T)
		if(!CanUse(U))
			break
		used = TRUE
		if(istype(A, /obj/machinery/light))
			ReplaceLight(A, U)

	if(!used)
		to_chat(U, span_warning("\The [src]'s refill light blinks red."))

/obj/item/lightreplacer/proc/janicart_insert(mob/user, obj/structure/janitorialcart/J)
	J.put_in_cart(src, user)
	J.myreplacer = src
	J.update_appearance()

/obj/item/lightreplacer/cyborg/janicart_insert(mob/user, obj/structure/janitorialcart/J)
	return

#undef LIGHT_OK
#undef LIGHT_EMPTY
#undef LIGHT_BROKEN
#undef LIGHT_BURNED