/obj/item/assembly/mousetrap
	name = "mousetrap"
	desc = "A handy little spring-loaded trap for catching pesty rodents."
	icon_state = "mousetrap"
	inhand_icon_state = "mousetrap"
	custom_materials = list(/datum/material/iron=SMALL_MATERIAL_AMOUNT)
	assembly_behavior = ASSEMBLY_TOGGLEABLE_INPUT
	var/armed = FALSE
	drop_sound = 'sound/items/handling/component_drop.ogg'
	pickup_sound = 'sound/items/handling/component_pickup.ogg'
	var/obj/item/host = null
	var/turf/host_turf = null

/**
 * update_host: automatically setup host and host_turf
 *
 * Arguments:
 * * force: Re-register signals even if the host or loc is unchanged
 */
/obj/item/assembly/mousetrap/proc/update_host(force = FALSE)
	var/obj/item/newhost
	// Pick the first valid object in this list:
	// Wiring datum's owner
	// assembly holder's attached object
	// assembly holder itself
	// us
	newhost = connected?.holder || holder?.master || holder || src

	// ok look
	// previously this wasn't working and thus no concern, but I made mousetraps work with wires
	// specifically in step-on-the-mousetrap mode, ie, when you enter its turf
	// and as a consequence, you can put a mousetrap in door wires and it will be set off
	// the first time someone walks through a door (enters the door's loc)
	// that's an interesting mechanic (bolt open a door for example) but it's not appropriate for a mousetrap
	// similarly if used on say an apc's wires it would go into effect when someone walked by it.  Not appropriate.
	// other assemblies could be made to do something similar instead.
	// mousetrap assemblies will still receive on-found notifications when you open a wiring panel
	// and (whether reasonable or not) mousetraps that do this do still trigger wires
	// the point is for now step-on-mousetrap mode should only work on items
	// maybe it should never have been an assembly in the first place.

	// tl;dr only trigger step-on mode if the host is an item
	if(!istype(newhost,/obj/item))
		if(host)
			UnregisterSignal(host,COMSIG_MOVABLE_MOVED)
			host = src
		if(isturf(host_turf))
			UnregisterSignal(host_turf,COMSIG_ATOM_ENTERED)
			host_turf = null
		return

	// If host changed
	if((newhost != host) || force)
		if(host)
			UnregisterSignal(host,COMSIG_MOVABLE_MOVED)
		host = newhost
		RegisterSignal(host,COMSIG_MOVABLE_MOVED, PROC_REF(holder_movement))

	// If host moved
	if((host_turf != host.loc) || force)
		if(isturf(host_turf))
			UnregisterSignal(host_turf,COMSIG_ATOM_ENTERED)
			host_turf = null
		if(isturf(host.loc))
			host_turf = host.loc
			RegisterSignal(host_turf,COMSIG_ATOM_ENTERED, PROC_REF(on_entered))
		else
			host_turf = null

/obj/item/assembly/mousetrap/holder_movement()
	. = ..()
	update_host()

/obj/item/assembly/mousetrap/Initialize(mapload)
	. = ..()
	update_host(force = TRUE)

/obj/item/assembly/mousetrap/examine(mob/user)
	. = ..()
	. += span_notice("The pressure plate is [armed?"primed":"safe"].")

/obj/item/assembly/mousetrap/activate()
	if(..())
		armed = !armed
		if(!armed)
			if(ishuman(usr))
				var/mob/living/carbon/human/user = usr
				if((HAS_TRAIT(user, TRAIT_DUMB) || HAS_TRAIT(user, TRAIT_CLUMSY)) && prob(50))
					to_chat(user, span_warning("Your hand slips, setting off the trigger!"))
					pulse()
		update_appearance()
		playsound(loc, 'sound/items/weapons/handcuffs.ogg', 30, TRUE, -3)

/obj/item/assembly/mousetrap/update_icon_state()
	icon_state = "mousetrap[armed ? "armed" : ""]"
	return ..()

/obj/item/assembly/mousetrap/update_icon(updates=ALL)
	. = ..()
	holder?.update_icon(updates)

/obj/item/assembly/mousetrap/on_attach()
	. = ..()
	update_host()

/obj/item/assembly/mousetrap/on_detach()
	. = ..()
	update_host()

/obj/item/assembly/mousetrap/proc/triggered(mob/target, type = "feet")
	if(!armed)
		return
	armed = FALSE // moved to the top because you could trigger it more than once under some circumstances
	update_appearance()
	var/obj/item/bodypart/affecting = null
	if(ishuman(target))
		var/mob/living/carbon/human/victim = target
		if(HAS_TRAIT(victim, TRAIT_PIERCEIMMUNE))
			playsound(src, 'sound/effects/snap.ogg', 50, TRUE)
			pulse()
			return FALSE
		switch(type)
			if("feet")
				if(!victim.shoes)
					affecting = victim.get_bodypart(pick(GLOB.leg_zones))
					victim.Paralyze(6 SECONDS)
				else
					to_chat(victim, span_notice("Your [victim.shoes.name] protects you from [src]."))
			if(BODY_ZONE_PRECISE_L_HAND, BODY_ZONE_PRECISE_R_HAND)
				if(!victim.gloves)
					affecting = victim.get_bodypart(type)
					victim.Stun(6 SECONDS)
				else
					to_chat(victim, span_notice("Your [victim.gloves.name] protects you from [src]."))
		if(affecting)
			victim.apply_damage(1, BRUTE, affecting, wound_bonus = CANT_WOUND)
	else if(ismouse(target))
		var/mob/living/basic/mouse/splatted = target
		visible_message(span_bolddanger("SPLAT!"))
		splatted.splat() // mousetraps are instadeath for mice

	else if(isregalrat(target))
		visible_message(span_bolddanger("Skreeeee!")) //He's simply too large to be affected by a tiny mouse trap.

	playsound(src, 'sound/effects/snap.ogg', 50, TRUE)
	pulse()

/**
 * clumsy_check: Sets off the mousetrap if handled by a clown (with some probability)
 *
 * Arguments:
 * * user: The mob handling the trap
 */
/obj/item/assembly/mousetrap/proc/clumsy_check(mob/living/carbon/human/user)
	if(!armed || !user)
		return FALSE
	if((HAS_TRAIT(user, TRAIT_DUMB) || HAS_TRAIT(user, TRAIT_CLUMSY)) && prob(50))
		var/which_hand = BODY_ZONE_PRECISE_L_HAND
		if(IS_RIGHT_INDEX(user.active_hand_index))
			which_hand = BODY_ZONE_PRECISE_R_HAND
		triggered(user, which_hand)
		user.visible_message(span_warning("[user] accidentally sets off [src], breaking their fingers."), \
			span_warning("You accidentally trigger [src]!"))
		return TRUE
	return FALSE

/obj/item/assembly/mousetrap/attack_self(mob/living/carbon/human/user)
	if(!armed)
		to_chat(user, span_notice("You arm [src]."))
	else
		if(clumsy_check(user))
			return
		to_chat(user, span_notice("You disarm [src]."))
	armed = !armed
	update_appearance()
	playsound(src, 'sound/items/weapons/handcuffs.ogg', 30, TRUE, -3)


// Clumsy check only
/obj/item/assembly/mousetrap/attack_hand(mob/living/carbon/human/user, list/modifiers)
	if(clumsy_check(user))
		return
	return ..()


/obj/item/assembly/mousetrap/proc/on_entered(datum/source, atom/movable/AM as mob|obj)
	SIGNAL_HANDLER
	if(armed)
		if(ismob(AM))
			var/mob/MM = AM
			if(!(MM.movement_type & MOVETYPES_NOT_TOUCHING_GROUND))
				if(ishuman(AM))
					var/mob/living/carbon/H = AM
					if(H.move_intent == MOVE_INTENT_RUN)
						INVOKE_ASYNC(src, PROC_REF(triggered), H)
						H.visible_message(span_warning("[H] accidentally steps on [src]."), \
							span_warning("You accidentally step on [src]"))
				else if(ismouse(MM) || isregalrat(MM))
					INVOKE_ASYNC(src, PROC_REF(triggered), MM)
		else if(AM.density) // For mousetrap grenades, set off by anything heavy
			INVOKE_ASYNC(src, PROC_REF(triggered), AM)

/obj/item/assembly/mousetrap/on_found(mob/finder)
	if(armed)
		if(finder)
			finder.visible_message(span_warning("[finder] accidentally sets off [src], breaking their fingers."), \
							   span_warning("You accidentally trigger [src]!"))
			triggered(finder, (IS_RIGHT_INDEX(finder.active_hand_index)) ? BODY_ZONE_PRECISE_R_HAND : BODY_ZONE_PRECISE_L_HAND)
			return TRUE //end the search!
		else
			visible_message(span_warning("[src] snaps shut!"))
			triggered(loc)
			return FALSE
	return FALSE


/obj/item/assembly/mousetrap/hitby(atom/movable/AM, skipcatch, hitpush, blocked, datum/thrownthing/throwingdatum)
	if(!armed)
		return ..()
	visible_message(span_warning("[src] is triggered by [AM]."))
	triggered(null)


/obj/item/assembly/mousetrap/Destroy()
	if(host)
		UnregisterSignal(host,COMSIG_MOVABLE_MOVED)
		host = null
	if(isturf(host_turf))
		UnregisterSignal(host_turf,COMSIG_ATOM_ENTERED)
		host_turf = null
	return ..()

/obj/item/assembly/mousetrap/armed
	icon_state = "mousetraparmed"
	armed = TRUE