/*
 * False Walls
 */

// Minimum pressure difference to fail building falsewalls.
// Also affects admin alerts.
#define FALSEDOOR_MAX_PRESSURE_DIFF 25.0

/**
* Gets the highest and lowest pressures from the tiles in cardinal directions
* around us, then checks the difference.
*/
/proc/getOPressureDifferential(var/turf/loc)
	var/minp=16777216;
	var/maxp=0;
	for(var/dir in cardinal)
		var/turf/simulated/T=get_turf(get_step(loc,dir))
		var/cp=0
		if(T && istype(T) && T.zone)
			var/datum/gas_mixture/environment = T.return_air()
			cp = environment.return_pressure()
		else
			if(istype(T,/turf/simulated))
				continue
		if(cp<minp)minp=cp
		if(cp>maxp)maxp=cp
	return abs(minp-maxp)

// Checks pressure here vs. around us.
/proc/performFalseWallPressureCheck(var/turf/loc)
	var/turf/simulated/lT=loc
	if(!istype(lT) || !lT.zone)
		return 0
	var/datum/gas_mixture/myenv=lT.return_air()
	var/pressure=myenv.return_pressure()

	for(var/dir in cardinal)
		var/turf/simulated/T=get_turf(get_step(loc,dir))
		if(T && istype(T) && T.zone)
			var/datum/gas_mixture/environment = T.return_air()
			var/pdiff = abs(pressure - environment.return_pressure())
			if(pdiff > FALSEDOOR_MAX_PRESSURE_DIFF)
				return pdiff
	return 0

/proc/performWallPressureCheck(var/turf/loc)
	var/pdiff = getOPressureDifferential(loc)
	if(pdiff > FALSEDOOR_MAX_PRESSURE_DIFF)
		return pdiff
	return 0

/client/proc/pdiff()
	set name = "Get PDiff"
	set category = "Debug"

	if(!mob || !holder)
		return
	var/turf/T = mob.loc

	if (!( istype(T, /turf) ))
		return

	var/pdiff = getOPressureDifferential(T)
	var/fwpcheck=performFalseWallPressureCheck(T)
	var/wpcheck=performWallPressureCheck(T)

	src << "Pressure Differential (cardinals): [pdiff]"
	src << "FWPCheck: [fwpcheck]"
	src << "WPCheck: [wpcheck]"

/obj/structure/falsewall
	name = "wall"
	desc = "A huge chunk of metal used to seperate rooms."
	anchored = 1
	icon = 'icons/turf/walls.dmi'
	var/mineral = "metal"
	var/walltype = "metal"
	var/opening = 0
	density = 1
	opacity = 1

/obj/structure/falsewall/New()
	relativewall_neighbours()
	..()

/obj/structure/falsewall/Destroy()

	var/temploc = loc
	loc = null

	for(var/turf/simulated/wall/W in range(temploc,1))
		W.relativewall()

	for(var/obj/structure/falsewall/W in range(temploc,1))
		W.relativewall()
	..()
	
/obj/structure/falsewall/relativewall()

	if(!density)
		icon_state = "[walltype]fwall_open"
		return

	var/junction = 0 //will be used to determine from which side the wall is connected to other walls

	for(var/turf/simulated/wall/W in orange(src,1))
		if(abs(src.x-W.x)-abs(src.y-W.y)) //doesn't count diagonal walls
			if(walltype == W.walltype)//Only 'like' walls connect -Sieve
				junction |= get_dir(src,W)
	for(var/obj/structure/falsewall/W in orange(src,1))
		if(abs(src.x-W.x)-abs(src.y-W.y)) //doesn't count diagonal walls
			if(walltype == W.walltype)
				junction |= get_dir(src,W)
	icon_state = "[walltype][junction]"
	return


/obj/structure/falsewall/attack_hand(mob/user)
	if(opening)
		return

	opening = 1
	if(density)
		do_the_flick()
		sleep(4)
		density = 0
		SetOpacity(0)
		update_icon(0)
	else
		var/srcturf = get_turf(src)
		for(var/mob/living/obstacle in srcturf) //Stop people from using this as a shield
			opening = 0
			return
		do_the_flick()
		density = 1
		sleep(4)
		SetOpacity(1)
		update_icon()
	opening = 0
	
/obj/structure/falsewall/proc/do_the_flick()
	if(density)
		flick("[walltype]fwall_opening", src)
	else
		flick("[walltype]fwall_closing", src)

/obj/structure/falsewall/update_icon(relativewall = 1)//Calling icon_update will refresh the smoothwalls if it's closed, otherwise it will make sure the icon is correct if it's open
	if(density)
		icon_state = "[walltype]0"
		if(relativewall)
			relativewall()
	else
		icon_state = "[walltype]fwall_open"
		
/obj/structure/falsewall/proc/ChangeToWall(delete = 1)
	var/turf/T = get_turf(src)
	if(!walltype || walltype == "metal")
		T.ChangeTurf(/turf/simulated/wall)
	else
		T.ChangeTurf(text2path("/turf/simulated/wall/mineral/[walltype]"))
	if(delete)
		qdel(src)
	return T

/obj/structure/falsewall/attackby(obj/item/weapon/W, mob/user)
	if(opening)
		user << "<span class='warning'>You must wait until the door has stopped moving.</span>"
		return

	if(density)
		var/turf/T = get_turf(src)
		if(T.density)
			user << "<span class='warning'>[src] is blocked!</span>"
			return
		if(istype(W, /obj/item/weapon/screwdriver))
			if (!istype(T, /turf/simulated/floor))
				user << "<span class='warning'>[src] bolts must be tightened on the floor!</span>"
				return
			user.visible_message("<span class='notice'>[user] tightens some bolts on the wall.</span>", "<span class='warning'>You tighten the bolts on the wall.</span>")
			ChangeToWall()
		if(istype(W, /obj/item/weapon/weldingtool))
			var/obj/item/weapon/weldingtool/WT = W
			if(WT.remove_fuel(0,user))
				dismantle(user)
	else
		user << "<span class='warning'>You can't reach, close it first!</span>"

	if(istype(W, /obj/item/weapon/pickaxe/plasmacutter) || istype(W, /obj/item/weapon/pickaxe/diamonddrill) || istype(W, /obj/item/weapon/melee/energy/blade))
		dismantle(user)

/obj/structure/falsewall/proc/dismantle(mob/user)
	user.visible_message("<span class='notice'>[user] dismantles the false wall.</span>", "<span class='warning'>You dismantle the false wall.</span>")
	new /obj/structure/girder/displaced(loc)
	if(mineral == "metal")
		if(istype(src, /obj/structure/falsewall/reinforced))
			new /obj/item/stack/sheet/plasteel(loc)
			new /obj/item/stack/sheet/plasteel(loc)
		else
			new /obj/item/stack/sheet/metal(loc)
			new /obj/item/stack/sheet/metal(loc)
	else
		var/P = text2path("/obj/item/stack/sheet/mineral/[mineral]")
		new P(loc)
		new P(loc)
	playsound(src, 'sound/items/Welder.ogg', 100, 1)
	qdel(src)

/*
 * False R-Walls
 */

/obj/structure/falsewall/reinforced
	name = "reinforced wall"
	desc = "A huge chunk of reinforced metal used to seperate rooms."
	icon_state = "r_wall"

/obj/structure/falsewall/reinforced/ChangeToWall(delete = 1)
	var/turf/T = get_turf(src)
	T.ChangeTurf(/turf/simulated/wall/r_wall)
	if(delete)
		qdel(src)
	return T

/obj/structure/falsewall/reinforced/do_the_flick()
	if(density)
		flick("frwall_opening", src)
	else
		flick("frwall_closing", src)

/obj/structure/falsewall/reinforced/update_icon(relativewall = 1)
	if(density)
		icon_state = "rwall0"
		src.relativewall()
	else
		icon_state = "frwall_open"

/obj/structure/falsewall/reinforced/relativewall()

	if(!density)
		icon_state = "frwall_open"
		return

	var/junction = 0 //will be used to determine from which side the wall is connected to other walls

	for(var/turf/simulated/wall/W in orange(src,1))
		if(abs(src.x-W.x)-abs(src.y-W.y)) //doesn't count diagonal walls
			if(src.walltype == W.walltype)//Only 'like' walls connect -Sieve
				junction |= get_dir(src,W)
	for(var/obj/structure/falsewall/W in orange(src,1))
		if(abs(src.x-W.x)-abs(src.y-W.y)) //doesn't count diagonal walls
			if(src.walltype == W.walltype)
				junction |= get_dir(src,W)
	icon_state = "rwall[junction]"
	return
	
/*
 * Uranium Falsewalls
 */

/obj/structure/falsewall/uranium
	name = "uranium wall"
	desc = "A wall with uranium plating. This is probably a bad idea."
	icon_state = ""
	mineral = "uranium"
	walltype = "uranium"
	var/active = null
	var/last_event = 0

/obj/structure/falsewall/uranium/attackby(obj/item/weapon/W as obj, mob/user as mob)
	radiate()
	..()

/obj/structure/falsewall/uranium/attack_hand(mob/user as mob)
	radiate()
	..()

/obj/structure/falsewall/uranium/proc/radiate()
	if(!active)
		if(world.time > last_event+15)
			active = 1
			for(var/mob/living/L in range(3,src))
				L.apply_effect(12,IRRADIATE,0)
			for(var/turf/simulated/wall/mineral/uranium/T in range(3,src))
				T.radiate()
			last_event = world.time
			active = null
			return
	return
/*
 * Other misc falsewall types
 */

/obj/structure/falsewall/gold
	name = "gold wall"
	desc = "A wall with gold plating. Swag!"
	icon_state = ""
	mineral = "gold"
	walltype = "gold"

/obj/structure/falsewall/silver
	name = "silver wall"
	desc = "A wall with silver plating. Shiny."
	icon_state = ""
	mineral = "silver"
	walltype = "silver"

/obj/structure/falsewall/diamond
	name = "diamond wall"
	desc = "A wall with diamond plating. You monster."
	icon_state = ""
	mineral = "diamond"
	walltype = "diamond"

/obj/structure/falsewall/plasma
	name = "plasma wall"
	desc = "A wall with plasma plating. This is definately a bad idea."
	icon_state = ""
	mineral = "plasma"
	walltype = "plasma"	

//-----------wtf?-----------start
/obj/structure/falsewall/clown
	name = "bananium wall"
	desc = "A wall with bananium plating. Honk!"
	icon_state = ""
	mineral = "clown"
	walltype = "clown"

/obj/structure/falsewall/sandstone
	name = "sandstone wall"
	desc = "A wall with sandstone plating."
	icon_state = ""
	mineral = "sandstone"
	walltype = "sandstone"
//------------wtf?------------end