/obj/item/forcefield_projector
	name = "forcefield projector"
	desc = "An experimental device that can create several forcefields at a distance."
	icon = 'icons/obj/devices/tool.dmi'
	icon_state = "signmaker_forcefield"
	slot_flags = ITEM_SLOT_BELT
	w_class = WEIGHT_CLASS_SMALL
	item_flags = NOBLUDGEON
	inhand_icon_state = "electronic"
	worn_icon_state = "electronic"
	lefthand_file = 'icons/mob/inhands/items/devices_lefthand.dmi'
	righthand_file = 'icons/mob/inhands/items/devices_righthand.dmi'
	custom_materials = list(/datum/material/iron= SMALL_MATERIAL_AMOUNT * 2.5, /datum/material/glass= SMALL_MATERIAL_AMOUNT * 5)
	var/max_shield_integrity = 250
	var/shield_integrity = 250
	var/max_fields = 3
	var/list/current_fields
	var/field_distance_limit = 7
	/// Time it takes to materialize a forcefield.
	var/creation_time = 1 SECONDS
	/// Checks to make sure the projector isn't busy with making another forcefield.
	var/force_proj_busy = FALSE

/obj/item/forcefield_projector/interact_with_atom(atom/interacting_with, mob/living/user, list/modifiers)
	return ranged_interact_with_atom(interacting_with, user, modifiers)

/obj/item/forcefield_projector/ranged_interact_with_atom(atom/interacting_with, mob/living/user, list/modifiers)
	if(!check_allowed_items(interacting_with, not_inside = TRUE))
		return NONE
	if(istype(interacting_with, /obj/structure/projected_forcefield))
		var/obj/structure/projected_forcefield/F = interacting_with
		if(F.generator == src)
			to_chat(user, span_notice("You deactivate [F]."))
			qdel(F)
			return ITEM_INTERACT_BLOCKING
	var/turf/T = get_turf(interacting_with)
	var/obj/structure/projected_forcefield/found_field = locate() in T
	if(found_field)
		to_chat(user, span_warning("There is already a forcefield in that location!"))
		return ITEM_INTERACT_BLOCKING
	if(T.density)
		return ITEM_INTERACT_BLOCKING
	if(get_dist(T,src) > field_distance_limit)
		return ITEM_INTERACT_BLOCKING
	if(get_turf(src) == T)
		to_chat(user, span_warning("Target is too close, aborting!"))
		return ITEM_INTERACT_BLOCKING
	if(LAZYLEN(current_fields) >= max_fields)
		to_chat(user, span_warning("[src] cannot sustain any more forcefields!"))
		return ITEM_INTERACT_BLOCKING
	if(force_proj_busy)
		to_chat(user, span_notice("[src] is busy creating a forcefield."))
		return ITEM_INTERACT_BLOCKING
	playsound(loc, 'sound/machines/click.ogg', 20, TRUE)
	if(creation_time)
		force_proj_busy = TRUE
		if(!do_after(user, creation_time, target = interacting_with))
			force_proj_busy = FALSE
			return ITEM_INTERACT_BLOCKING
		force_proj_busy = FALSE

	playsound(src,'sound/items/weapons/resonator_fire.ogg',50,TRUE)
	user.visible_message(span_warning("[user] projects a forcefield!"),span_notice("You project a forcefield."))
	var/obj/structure/projected_forcefield/F = new(T, src)
	current_fields += F
	user.changeNext_move(CLICK_CD_MELEE)
	return ITEM_INTERACT_SUCCESS

/obj/item/forcefield_projector/attack_self(mob/user)
	if(LAZYLEN(current_fields))
		to_chat(user, span_notice("You deactivate [src], disabling all active forcefields."))
		for(var/obj/structure/projected_forcefield/F in current_fields)
			qdel(F)

/obj/item/forcefield_projector/examine(mob/user)
	. = ..()
	. += span_notice("It is currently sustaining [LAZYLEN(current_fields)]/[max_fields] fields, and it's [round((shield_integrity/max_shield_integrity)*100)]% charged.")

/obj/item/forcefield_projector/Initialize(mapload)
	. = ..()
	current_fields = list()
	START_PROCESSING(SSobj, src)

/obj/item/forcefield_projector/Destroy()
	STOP_PROCESSING(SSobj, src)
	return ..()

/obj/item/forcefield_projector/process(seconds_per_tick)
	if(!LAZYLEN(current_fields))
		shield_integrity = min(shield_integrity + seconds_per_tick * 2, max_shield_integrity)
	else
		shield_integrity = max(shield_integrity - LAZYLEN(current_fields) * seconds_per_tick * 0.5, 0) //fields degrade slowly over time
	for(var/obj/structure/projected_forcefield/F in current_fields)
		if(shield_integrity <= 0 || get_dist(F,src) > field_distance_limit)
			qdel(F)

/obj/structure/projected_forcefield
	name = "forcefield"
	desc = "A glowing barrier, generated by a projector nearby. It could be overloaded if hit enough times."
	icon = 'icons/effects/effects.dmi'
	icon_state = "forcefield"
	layer = ABOVE_ALL_MOB_LAYER
	plane = ABOVE_GAME_PLANE
	anchored = TRUE
	pass_flags_self = PASSGLASS
	density = TRUE
	mouse_opacity = MOUSE_OPACITY_OPAQUE
	resistance_flags = INDESTRUCTIBLE
	can_atmos_pass = ATMOS_PASS_DENSITY
	armor_type = /datum/armor/structure_projected_forcefield
	var/obj/item/forcefield_projector/generator

/datum/armor/structure_projected_forcefield
	bullet = 25
	laser = 50
	energy = 50
	bomb = 25
	fire = 100
	acid = 100

/obj/structure/projected_forcefield/Initialize(mapload, obj/item/forcefield_projector/origin)
	. = ..()
	generator = origin

/obj/structure/projected_forcefield/Destroy()
	visible_message(span_warning("[src] flickers and disappears!"))
	playsound(src,'sound/items/weapons/resonator_blast.ogg',25,TRUE)
	if(generator)
		generator.current_fields -= src
		generator = null
	return ..()

/obj/structure/projected_forcefield/play_attack_sound(damage_amount, damage_type = BRUTE, damage_flag = 0)
	playsound(loc, 'sound/items/weapons/egloves.ogg', 80, TRUE)

/obj/structure/projected_forcefield/take_damage(damage_amount, damage_type = BRUTE, damage_flag = 0, sound_effect = 1, attack_dir)
	if(sound_effect)
		play_attack_sound(damage_amount, damage_type, damage_flag)
	if(generator)
		generator.shield_integrity = max(generator.shield_integrity - damage_amount, 0)