var/image/contamination_overlay = image('icons/effects/contamination.dmi')

/obj/item
	var/contaminated = 0

/obj/item/proc/can_contaminate()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/obj/item/proc/can_contaminate() called tick#: [world.time]")
	// clothing and backpacks can be contaminated.
	if(flags & PLASMAGUARD)
		return 0
	else if(istype(src, /obj/item/weapon/storage/backpack))
		return 0 // cannot be washed :(
	else if(istype(src, /obj/item/clothing))
		return 1

/obj/item/proc/contaminate()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/obj/item/proc/contaminate() called tick#: [world.time]")
	// do a contamination overlay?
	// temporary measure to keep contamination less deadly than it was.
	if(!contaminated)
		contaminated = 1
		overlays.Add(contamination_overlay)

/obj/item/proc/decontaminate()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/obj/item/proc/decontaminate() called tick#: [world.time]")
	contaminated = 0
	overlays.Remove(contamination_overlay)

/mob/proc/contaminate()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/mob/proc/contaminate() called tick#: [world.time]")

/mob/living/carbon/human/contaminate()
	//See if anything can be contaminated.

	if(!pl_suit_protected())
		suit_contamination()

	if(!pl_head_protected())
		if(prob(1)) suit_contamination() //Plasma can sometimes get through such an open suit.

//Cannot wash backpacks currently.
//	if(istype(back,/obj/item/weapon/storage/backpack))
//		back.contaminate()

/mob/proc/pl_effects()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/mob/proc/pl_effects() called tick#: [world.time]")

/mob/living/carbon/human/pl_effects()
	//Handles all the bad things plasma can do.

	if(flags & INVULNERABLE)
		return

	//Contamination
	if(zas_settings.Get(/datum/ZAS_Setting/CLOTH_CONTAMINATION)) contaminate()

	//Anything else requires them to not be dead.
	if(stat >= 2)
		return

	if(species.breath_type != "plasma")

		//Burn skin if exposed.
		if(zas_settings.Get(/datum/ZAS_Setting/SKIN_BURNS))
			if(!pl_head_protected() || !pl_suit_protected())
				burn_skin(0.75)
				if(prob(20)) src << "<span class='warning'>Your skin burns!</span>"
				updatehealth()

		//Burn eyes if exposed.
		if(zas_settings.Get(/datum/ZAS_Setting/EYE_BURNS))
			var/eye_protection = get_body_part_coverage(EYES)
			if(!eye_protection)
				burn_eyes()

		//Genetic Corruption
		if(zas_settings.Get(/datum/ZAS_Setting/GENETIC_CORRUPTION))
			if(rand(1,10000) < zas_settings.Get(/datum/ZAS_Setting/GENETIC_CORRUPTION))
				randmutb(src)
				src << "<span class='warning'>High levels of toxins cause you to spontaneously mutate.</span>"
				domutcheck(src,null)


/mob/living/carbon/human/proc/burn_eyes()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/mob/living/carbon/human/proc/burn_eyes() called tick#: [world.time]")
	//The proc that handles eye burning.
	if(!species.has_organ["eyes"])
		return
	var/datum/organ/internal/eyes/E = internal_organs_by_name["eyes"]
	if(E)
		if(prob(20)) src << "<span class='warning'>Your eyes burn!</span>"
		E.damage += 2.5
		eye_blurry = min(eye_blurry+1.5,50)
		if (prob(max(0,E.damage - 15) + 1) && !eye_blind)
			src << "<span class='warning'>You are blinded!</span>"
			eye_blind += 20

/mob/living/carbon/human/proc/pl_head_protected()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/mob/living/carbon/human/proc/pl_head_protected() called tick#: [world.time]")
	//Checks if the head is adequately sealed.
	if(head)
		if(zas_settings.Get(/datum/ZAS_Setting/PLASMAGUARD_ONLY))
			if(head.flags & PLASMAGUARD)
				return 1
		else if(check_body_part_coverage(EYES))
			return 1
	return 0

/mob/living/carbon/human/proc/pl_suit_protected()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/mob/living/carbon/human/proc/pl_suit_protected() called tick#: [world.time]")
	//Checks if the suit is adequately sealed.
	if(wear_suit)
		if(zas_settings.Get(/datum/ZAS_Setting/PLASMAGUARD_ONLY))
			if(wear_suit.flags & PLASMAGUARD) return 1
		else
			if(wear_suit.flags_inv & HIDEJUMPSUIT) return 1
	return 0

/mob/living/carbon/human/proc/suit_contamination()
	writepanic("[__FILE__].[__LINE__] ([src.type])([usr ? usr.ckey : ""])  \\/mob/living/carbon/human/proc/suit_contamination() called tick#: [world.time]")
	//Runs over the things that can be contaminated and does so.
	if(w_uniform) w_uniform.contaminate()
	if(shoes) shoes.contaminate()
	if(gloves) gloves.contaminate()


/turf/Entered(atom/movable/Obj, atom/OldLoc)
	..(Obj, OldLoc)

	var/obj/item/I = Obj

	// items that are in plasma, but not on a mob, can still be contaminated.
	if(istype(I) && zas_settings.Get(/datum/ZAS_Setting/CLOTH_CONTAMINATION))
		var/datum/gas_mixture/environment = return_air()

		if(environment.toxins > MOLES_PLASMA_VISIBLE + 1)
			if(I.can_contaminate())
				I.contaminate()