/obj/structure/girder
	name = "girder"
	icon_state = "girder"
	anchored = 1
	density = 1
	layer = BELOW_OBJ_LAYER
	var/state = GIRDER_NORMAL
	var/girderpasschance = 20 // percentage chance that a projectile passes through the girder.
	var/health = 200
	var/can_displace = TRUE //If the girder can be moved around by crowbarring it
	var/metalUsed = 2 //used to determine amount returned in deconstruction

/obj/structure/girder/examine(mob/user)
	. = ..()
	switch(state)
		if(GIRDER_REINF)
			to_chat(user, "<span class='notice'>The support struts are <b>screwed</b> in place.</span>")
		if(GIRDER_REINF_STRUTS)
			to_chat(user, "<span class='notice'>The support struts are <i>unscrewed</i> and the inner <b>grille</b> is intact.</span>")
		if(GIRDER_NORMAL)
			if(can_displace)
				to_chat(user, "<span class='notice'>The bolts are <b>lodged</b> in place.</span>")
		if(GIRDER_DISPLACED)
			to_chat(user, "<span class='notice'>The bolts are <i>loosened</i>, but the <b>screws</b> are holding [src] together.</span>")
		if(GIRDER_DISASSEMBLED)
			to_chat(user, "<span class='notice'>[src] is disassembled! You probably shouldn't be able to see this examine message.</span>")

/obj/structure/girder/proc/refundMetal(metalAmount) //refunds metal used in construction when deconstructed
	for(var/i=0;i < metalAmount;i++)
		new /obj/item/stack/sheet/metal(get_turf(src))

/obj/structure/girder/attack_animal(mob/living/simple_animal/M)
	M.changeNext_move(CLICK_CD_MELEE)
	M.do_attack_animation(src)
	if((M.environment_smash & ENVIRONMENT_SMASH_STRUCTURES) || (M.environment_smash & ENVIRONMENT_SMASH_WALLS) || (M.environment_smash & ENVIRONMENT_SMASH_RWALLS))
		if(M.environment_smash & ENVIRONMENT_SMASH_RWALLS)
			ex_act(2)
			M.visible_message("<span class='warning'>[M] smashes through \the [src].</span>", "<span class='warning'>You smash through \the [src].</span>")
		else
			M.visible_message("<span class='warning'>[M] smashes against \the [src].</span>", "<span class='warning'>You smash against \the [src].</span>")
			take_damage(rand(25, 75))
			return

/obj/structure/girder/take_damage(amount)
	health -= amount
	if(health <= 0)
		new /obj/item/stack/sheet/metal(get_turf(src))
		qdel(src)

/obj/structure/girder/temperature_expose(datum/gas_mixture/air, exposed_temperature)
	..()
	var/temp_check = exposed_temperature
	if(temp_check >= GIRDER_MELTING_TEMP)
		take_damage(10)

/obj/structure/girder/attackby(obj/item/W, mob/user, params)
	add_fingerprint(user)
	if(isscrewdriver(W))
		if(state == GIRDER_DISPLACED)
			playsound(loc, W.usesound, 100, 1)
			user.visible_message("<span class='warning'>[user] disassembles the girder.</span>", \
								"<span class='notice'>You start to disassemble the girder...</span>", "You hear clanking and banging noises.")
			if(do_after(user, 40*W.toolspeed, target = src))
				if(state != GIRDER_DISPLACED)
					return
				state = GIRDER_DISASSEMBLED
				to_chat(user, "<span class='notice'>You disassemble the girder.</span>")
				var/obj/item/stack/sheet/metal/M = new(loc, 2)
				M.add_fingerprint(user)
				qdel(src)
		else if(state == GIRDER_REINF)
			playsound(loc, W.usesound, 100, 1)
			to_chat(user, "<span class='notice'>You start unsecuring support struts...</span>")
			if(do_after(user, 40*W.toolspeed, target = src))
				if(state != GIRDER_REINF)
					return
				to_chat(user, "<span class='notice'>You unsecure the support struts.</span>")
				state = GIRDER_REINF_STRUTS
		else if(state == GIRDER_REINF_STRUTS)
			playsound(loc, W.usesound, 100, 1)
			to_chat(user, "<span class='notice'>You start securing support struts...</span>")
			if(do_after(user, 40*W.toolspeed, target = src))
				if(state != GIRDER_REINF_STRUTS)
					return
				to_chat(user, "<span class='notice'>You secure the support struts.</span>")
				state = GIRDER_REINF

	else if(iswrench(W))
		if(state == GIRDER_NORMAL)
			playsound(loc, W.usesound, 100, 1)
			user.visible_message("<span class='warning'>[user] disassembles the girder.</span>", \
								"<span class='notice'>You start to disassemble the girder...</span>", "You hear clanking and banging noises.")
			if(do_after(user, 40*W.toolspeed, target = src))
				if(state != GIRDER_NORMAL)
					return
				state = GIRDER_DISASSEMBLED
				to_chat(user, "<span class='notice'>You disassemble the girder.</span>")
				var/obj/item/stack/sheet/metal/M = new(loc, 2)
				M.add_fingerprint(user)
				qdel(src)
		else if(state == GIRDER_DISPLACED)
			if(!isfloorturf(loc))
				to_chat(user, "<span class='warning'>A floor must be present to secure the girder!</span>")
				return
			playsound(loc, W.usesound, 100, 1)
			to_chat(user, "<span class='notice'>You start securing the girder...</span>")
			if(do_after(user, 40*W.toolspeed, target = src))
				to_chat(user, "<span class='notice'>You secure the girder.</span>")
				var/obj/structure/girder/G = new(loc)
				transfer_fingerprints_to(G)
				qdel(src)

	else if(istype(W, /obj/item/gun/energy/plasmacutter))
		to_chat(user, "<span class='notice'>You start slicing apart the girder...</span>")
		if(do_after(user, 40 * W.toolspeed, target = src))
			if(!src)
				return
			playsound(loc, W.usesound, 100, 1)
			to_chat(user, "<span class='notice'>You slice apart the girder.</span>")
			refundMetal(metalUsed)
			qdel(src)

	else if(istype(W, /obj/item/pickaxe/drill/diamonddrill))
		to_chat(user, "<span class='notice'>You drill through the girder!</span>")
		refundMetal(metalUsed)
		qdel(src)

	else if(istype(W, /obj/item/pickaxe/drill/jackhammer))
		playsound(loc, W.usesound, 100, 1)
		to_chat(user, "<span class='notice'>You disintegrate the girder!</span>")
		refundMetal(metalUsed)
		qdel(src)

	else if(iswirecutter(W) && state == GIRDER_REINF_STRUTS)
		playsound(loc, W.usesound, 100, 1)
		to_chat(user, "<span class='notice'>You start removing the inner grille...</span>")
		if(do_after(user, 40 * W.toolspeed, target = src))
			if(!src)
				return
			to_chat(user, "<span class='notice'>You remove the inner grille.</span>")
			new /obj/item/stack/sheet/plasteel(get_turf(src))
			var/obj/structure/girder/G = new (loc)
			transfer_fingerprints_to(G)
			qdel(src)

	else if(iscrowbar(W))
		if(state == GIRDER_NORMAL && can_displace)
			playsound(loc, W.usesound, 100, 1)
			to_chat(user, "<span class='notice'>You start dislodging the girder...</span>")
			if(do_after(user, 40*W.toolspeed, target = src))
				to_chat(user, "<span class='notice'>You dislodge the girder.</span>")
				var/obj/structure/girder/displaced/D = new (loc)
				transfer_fingerprints_to(D)
				qdel(src)

	else if(istype(W, /obj/item/stack))
		if(iswallturf(loc))
			to_chat(user, "<span class='warning'>There is already a wall present!</span>")
			return
		if(!isfloorturf(loc))
			to_chat(user, "<span class='warning'>A floor must be present to build a false wall!</span>")
			return
		if (locate(/obj/structure/falsewall) in loc.contents)
			to_chat(user, "<span class='warning'>There is already a false wall present!</span>")
			return
		if(istype(W, /obj/item/stack/sheet/runed_metal))
			to_chat(user, "<span class='warning'>You can't seem to make the metal bend..</span>")
			return

		if(istype(W,/obj/item/stack/rods))
			var/obj/item/stack/rods/S = W
			if(state == GIRDER_DISPLACED)
				if(S.get_amount() < 2)
					to_chat(user, "<span class='warning'>You need at least two rods to create a false wall!</span>")
					return
				to_chat(user, "<span class='notice'>You start building a reinforced false wall...</span>")
				if(do_after(user, 20, target = src))
					if(!loc || !S || S.get_amount() < 2)
						return
					S.use(2)
					to_chat(user, "<span class='notice'>You create a false wall. Push on it to open or close the passage.</span>")
					var/obj/structure/falsewall/iron/FW = new (loc)
					transfer_fingerprints_to(FW)
					qdel(src)
			else
				if(S.get_amount() < 5)
					to_chat(user, "<span class='warning'>You need at least five rods to add plating!</span>")
					return
				to_chat(user, "<span class='notice'>You start adding plating...</span>")
				if (do_after(user, 40, target = src))
					if(!loc || !S || S.get_amount() < 5)
						return
					S.use(5)
					to_chat(user, "<span class='notice'>You add the plating.</span>")
					var/turf/T = get_turf(src)
					T.ChangeTurf(/turf/simulated/wall/mineral/iron)
					transfer_fingerprints_to(T)
					qdel(src)
				return

		if(!istype(W,/obj/item/stack/sheet))
			return

		var/obj/item/stack/sheet/S = W
		if(!S.wall_allowed)
			to_chat(user, "<span class='warning'>You don't think that is good material for a wall!</span>")
			return

		if(istype(S, /obj/item/stack/sheet/wood))
			if(state == GIRDER_DISPLACED)
				if(S.get_amount() < 2)
					to_chat(user, "<span class='warning'>You need two planks of wood to create a false wall!</span>")
					return
				to_chat(user, "<span class='notice'>You start building a false wall...</span>")
				if(do_after(user, 20, target = src))
					if(!loc || !S || S.get_amount() < 2)
						return
					S.use(2)
					to_chat(user, "<span class='notice'>You create a false wall. Push on it to open or close the passage.</span>")
					var/obj/structure/falsewall/wood/falsewood = new(loc)
					transfer_fingerprints_to(falsewood)
					qdel(src)
			else
				if(S.get_amount() < 2)
					to_chat(user, "<span class='warning'>You need two planks of wood to finish a wall!</span>")
					return
				to_chat(user, "<span class='notice'>You start adding plating...</span>")
				if(do_after(user, 40 * W.toolspeed, target = src))
					if(!src || !S || S.get_amount() < 2)
						return
					S.use(2)
					to_chat(user, "<span class='notice'>You add the plating.</span>")
					var/turf/Tsrc = get_turf(src)
					Tsrc.ChangeTurf(/turf/simulated/wall/mineral/wood)
					for(var/turf/simulated/wall/mineral/wood/X in Tsrc.loc)
						if(X)
							X.add_hiddenprint(usr)
					qdel(src)
				return

		else if(istype(S, /obj/item/stack/sheet/metal))
			if(state == GIRDER_DISPLACED)
				if(S.get_amount() < 2)
					to_chat(user, "<span class='warning'>You need two sheets of metal to create a false wall!</span>")
					return
				to_chat(user, "<span class='notice'>You start building a false wall...</span>")
				if(do_after(user, 20, target = src))
					if(!loc || !S || S.get_amount() < 2)
						return
					S.use(2)
					to_chat(user, "<span class='notice'>You create a false wall. Push on it to open or close the passage.</span>")
					var/obj/structure/falsewall/F = new(loc)
					transfer_fingerprints_to(F)
					qdel(src)
			else
				if(S.get_amount() < 2)
					to_chat(user, "<span class='warning'>You need two sheets of metal to finish a wall!</span>")
					return
				to_chat(user, "<span class='notice'>You start adding plating...</span>")
				if(do_after(user, 40 * W.toolspeed, target = src))
					if(!src || !S || S.get_amount() < 2)
						return
					S.use(2)
					to_chat(user, "<span class='notice'>You add the plating.</span>")
					var/turf/Tsrc = get_turf(src)
					Tsrc.ChangeTurf(/turf/simulated/wall)
					for(var/turf/simulated/wall/X in Tsrc.loc)
						if(X)
							X.add_hiddenprint(usr)
					qdel(src)
				return

		if(istype(S, /obj/item/stack/sheet/plasteel))
			if(state == GIRDER_DISPLACED)
				if(S.get_amount() < 2)
					to_chat(user, "<span class='warning'>You need at least two sheets to create a false wall!</span>")
					return
				to_chat(user, "<span class='notice'>You start building a reinforced false wall...</span>")
				if(do_after(user, 20, target = src))
					if(!loc || !S || S.get_amount() < 2)
						return
					S.use(2)
					to_chat(user, "<span class='notice'>You create a reinforced false wall. Push on it to open or close the passage.</span>")
					var/obj/structure/falsewall/reinforced/FW = new (loc)
					transfer_fingerprints_to(FW)
					qdel(src)
			else
				if(state == GIRDER_REINF)
					if(S.get_amount() < 1)
						return
					to_chat(user, "<span class='notice'>You start finalizing the reinforced wall...</span>")
					if(do_after(user, 50, target = src))
						if(!src || !S || S.get_amount() < 1)
							return
						S.use(1)
						to_chat(user, "<span class='notice'>You fully reinforce the wall.</span>")
						var/turf/Tsrc = get_turf(src)
						Tsrc.ChangeTurf(/turf/simulated/wall/r_wall)
						for(var/turf/simulated/wall/r_wall/X in Tsrc.loc)
							if(X)
								X.add_hiddenprint(usr)
						qdel(src)
					return
				else
					if(S.get_amount() < 1)
						return
					to_chat(user, "<span class='notice'>You start reinforcing the girder...</span>")
					if(do_after(user,60, target = src))
						if(!src || !S || S.get_amount() < 1)
							return
						S.use(1)
						to_chat(user, "<span class='notice'>You reinforce the girder.</span>")
						var/obj/structure/girder/reinforced/R = new (loc)
						transfer_fingerprints_to(R)
						qdel(src)
					return

		if(S.sheettype)
			var/M = S.sheettype
			if(state == GIRDER_DISPLACED)
				if(S.get_amount() < 2)
					to_chat(user, "<span class='warning'>You need at least two sheets to create a false wall!</span>")
					return
				if(do_after(user, 20, target = src))
					if(!loc || !S || S.get_amount() < 2)
						return
					S.use(2)
					to_chat(user, "<span class='notice'>You create a false wall. Push on it to open or close the passage.</span>")
					var/F = text2path("/obj/structure/falsewall/[M]")
					var/obj/structure/FW = new F (loc)
					transfer_fingerprints_to(FW)
					qdel(src)
			else
				if(S.get_amount() < 2)
					to_chat(user, "<span class='warning'>You need at least two sheets to add plating!</span>")
					return
				to_chat(user, "<span class='notice'>You start adding plating...</span>")
				if(do_after(user,40, target = src))
					if(!src || !S || S.get_amount() < 2)
						return
					S.use(2)
					to_chat(user, "<span class='notice'>You add the plating.</span>")
					var/turf/Tsrc = get_turf(src)
					Tsrc.ChangeTurf(text2path("/turf/simulated/wall/mineral/[M]"))
					for(var/turf/simulated/wall/mineral/X in Tsrc.loc)
						if(X)
							X.add_hiddenprint(usr)
					qdel(src)
				return

		add_hiddenprint(user)

	else if(istype(W, /obj/item/pipe))
		var/obj/item/pipe/P = W
		if(P.pipe_type in list(0, 1, 5))	//simple pipes, simple bends, and simple manifolds.
			if(!user.drop_item())
				return
			P.loc = src.loc
			to_chat(user, "<span class='notice'>You fit the pipe into \the [src].</span>")
	else
		return ..()

/obj/structure/girder/CanPass(atom/movable/mover, turf/target, height=0)
	if(height==0)
		return 1
	if(istype(mover) && mover.checkpass(PASSGRILLE))
		return prob(girderpasschance)
	else
		if(istype(mover, /obj/item/projectile))
			return prob(girderpasschance)
		else
			return 0

/obj/structure/girder/CanAStarPass(ID, dir, caller)
	. = !density
	if(ismovableatom(caller))
		var/atom/movable/mover = caller
		. = . || mover.checkpass(PASSGRILLE)

/obj/structure/girder/deconstruct(disassembled = TRUE)
	if(can_deconstruct)
		var/remains = pick(/obj/item/stack/rods,/obj/item/stack/sheet/metal)
		new remains(loc)
	qdel(src)

/obj/structure/girder/blob_act()
	if(prob(40))
		qdel(src)

/obj/structure/girder/narsie_act()
	if(prob(25))
		new /obj/structure/girder/cult(loc)
		qdel(src)

/obj/structure/girder/bullet_act(obj/item/projectile/Proj)
	if(istype(Proj ,/obj/item/projectile/beam/pulse))
		ex_act(2)
	else
		take_damage(Proj.damage)
	..()
	return 0

/obj/structure/girder/ex_act(severity)
	switch(severity)
		if(1)
			qdel(src)
			return
		if(2)
			if(prob(75))
				var/remains = pick(/obj/item/stack/rods,/obj/item/stack/sheet/metal)
				new remains(loc)
				qdel(src)
			return
		if(3)
			if(prob(40))
				var/remains = pick(/obj/item/stack/rods,/obj/item/stack/sheet/metal)
				new remains(loc)
				qdel(src)
			return
		else
	return

/obj/structure/girder/displaced
	name = "displaced girder"
	icon_state = "displaced"
	anchored = 0
	state = GIRDER_DISPLACED
	girderpasschance = 25
	health = 120

/obj/structure/girder/reinforced
	name = "reinforced girder"
	icon_state = "reinforced"
	state = GIRDER_REINF
	girderpasschance = 0
	health = 350

/obj/structure/girder/cult
	name = "runed girder"
	desc = "Framework made of a strange and shockingly cold metal. It doesn't seem to have any bolts."
	icon = 'icons/obj/cult.dmi'
	icon_state= "cultgirder"
	can_displace = FALSE
	metalUsed = 1

/obj/structure/girder/cult/refundMetal(metalAmount)
	for(var/i=0;i < metalAmount;i++)
		new /obj/item/stack/sheet/runed_metal(get_turf(src))

/obj/structure/girder/cult/attackby(obj/item/W, mob/user, params)
	add_fingerprint(user)
	if(istype(W, /obj/item/tome) && iscultist(user)) //Cultists can demolish cult girders instantly with their tomes
		user.visible_message("<span class='warning'>[user] strikes [src] with [W]!</span>", "<span class='notice'>You demolish [src].</span>")
		refundMetal(metalUsed)
		qdel(src)

	else if(iswelder(W))
		var/obj/item/weldingtool/WT = W
		if(WT.remove_fuel(0,user))
			playsound(loc, W.usesound, 50, 1)
			to_chat(user, "<span class='notice'>You start slicing apart the girder...</span>")
			if(do_after(user, 40*W.toolspeed, target = src))
				if(!WT.isOn())
					return
				to_chat(user, "<span class='notice'>You slice apart the girder.</span>")
				var/obj/item/stack/sheet/runed_metal/R = new(get_turf(src))
				R.amount = 1
				transfer_fingerprints_to(R)
				qdel(src)

	else if(istype(W, /obj/item/gun/energy/plasmacutter))
		to_chat(user, "<span class='notice'>You start slicing apart the girder...</span>")
		if(do_after(user, 40* W.toolspeed, target = src))
			playsound(loc, W.usesound, 100, 1)
			to_chat(user, "<span class='notice'>You slice apart the girder.</span>")
			var/obj/item/stack/sheet/runed_metal/R = new(get_turf(src))
			R.amount = 1
			transfer_fingerprints_to(R)
			qdel(src)

	else if(istype(W, /obj/item/pickaxe/drill/jackhammer))
		var/obj/item/pickaxe/drill/jackhammer/D = W
		to_chat(user, "<span class='notice'>Your jackhammer smashes through the girder!</span>")
		var/obj/item/stack/sheet/runed_metal/R = new(get_turf(src))
		R.amount = 1
		transfer_fingerprints_to(R)
		D.playDigSound()
		qdel(src)

	else if(istype(W, /obj/item/stack/sheet/runed_metal))
		var/obj/item/stack/sheet/runed_metal/R = W
		if(R.get_amount() < 1)
			to_chat(user, "<span class='warning'>You need at least one sheet of runed metal to construct a runed wall!</span>")
			return 0
		user.visible_message("<span class='notice'>[user] begins laying runed metal on [src]...</span>", "<span class='notice'>You begin constructing a runed wall...</span>")
		if(do_after(user, 50, target = src))
			if(R.get_amount() < 1 || !R)
				return
			user.visible_message("<span class='notice'>[user] plates [src] with runed metal.</span>", "<span class='notice'>You construct a runed wall.</span>")
			R.use(1)
			var/turf/T = get_turf(src)
			T.ChangeTurf(/turf/simulated/wall/cult)
			qdel(src)

/obj/structure/girder/cult/take_damage(amount)
	health -= amount
	if(health <= 0)
		new /obj/item/stack/sheet/runed_metal(get_turf(src))
		qdel(src)

/obj/structure/girder/cult/narsie_act()
	return

/obj/structure/girder/cult/deconstruct(disassembled = TRUE)
	if(can_deconstruct)
		new/obj/item/stack/sheet/runed_metal/(get_turf(src), 1)
	qdel(src)