//generic procs copied from obj/effect/alien
/obj/structure/spider
	name = "web"
	desc = "it's stringy and sticky"
	icon = 'icons/effects/effects.dmi'
	anchored = TRUE
	density = FALSE
	var/health = 15
	var/mob/living/carbon/human/master_commander = null

/obj/structure/spider/Destroy()
	master_commander = null
	return ..()

//similar to weeds, but only barfed out by nurses manually
/obj/structure/spider/ex_act(severity)
	switch(severity)
		if(1)
			qdel(src)
		if(2)
			if(prob(50))
				qdel(src)
		if(3)
			if(prob(5))
				qdel(src)

/obj/structure/spider/attackby(obj/item/W, mob/user, params)
	if(W.attack_verb.len)
		visible_message("<span class='danger'>[user] has [pick(W.attack_verb)] [src] with [W]!</span>")
	else
		visible_message("<span class='danger'>[user] has attacked [src] with [W]!</span>")
	var/damage = W.force / 4
	if(iswelder(W))
		var/obj/item/weldingtool/WT = W
		if(WT.remove_fuel(0, user))
			damage = 15
			playsound(loc, WT.usesound, 100, 1)
	user.changeNext_move(CLICK_CD_MELEE)
	user.do_attack_animation(src)
	health -= damage
	healthcheck()

/obj/structure/spider/attack_animal(mob/living/simple_animal/M)
	if(M.melee_damage_upper == 0)
		return
	var/damage = rand(M.melee_damage_lower, M.melee_damage_upper)
	M.changeNext_move(CLICK_CD_MELEE)
	M.do_attack_animation(src)
	visible_message("<span class='danger'>\The [M] [M.attacktext] [src]!</span>")
	health -= damage
	healthcheck()

/obj/structure/spider/attack_alien(mob/living/carbon/alien/humanoid/M)
	playsound(loc, 'sound/weapons/slash.ogg', 25, 1, -1)
	visible_message("<span class='danger'>[M] has slashed at [src]!</span>", "<span class='userdanger'>[M] has slashed at [src]!</span>")
	M.changeNext_move(CLICK_CD_MELEE)
	M.do_attack_animation(src)
	var/damage = rand(10, 20)
	health -= damage
	healthcheck()

/obj/structure/spider/bullet_act(obj/item/projectile/Proj)
	..()
	health -= Proj.damage
	healthcheck()

/obj/structure/spider/proc/healthcheck()
	if(health <= 0)
		qdel(src)

/obj/structure/spider/temperature_expose(datum/gas_mixture/air, exposed_temperature, exposed_volume)
	..()
	if(exposed_temperature > 300)
		health -= 5
		healthcheck()

/obj/structure/spider/stickyweb
	icon_state = "stickyweb1"

/obj/structure/spider/stickyweb/New()
	..()
	if(prob(50))
		icon_state = "stickyweb2"

/obj/structure/spider/stickyweb/CanPass(atom/movable/mover, turf/target, height=0)
	if(height == 0)
		return TRUE
	if(istype(mover, /mob/living/simple_animal/hostile/poison/giant_spider))
		return TRUE
	else if(istype(mover, /mob/living))
		if(prob(50))
			to_chat(mover, "<span class='danger'>You get stuck in [src] for a moment.</span>")
			return FALSE
	else if(istype(mover, /obj/item/projectile))
		return prob(30)
	return TRUE

/obj/structure/spider/eggcluster
	name = "egg cluster"
	desc = "They seem to pulse slightly with an inner life"
	icon_state = "eggs"
	var/amount_grown = 0
	var/player_spiders = 0
	var/list/faction = list()

/obj/structure/spider/eggcluster/New()
	..()
	pixel_x = rand(3,-3)
	pixel_y = rand(3,-3)
	START_PROCESSING(SSobj, src)

/obj/structure/spider/eggcluster/process()
	amount_grown += rand(0,2)
	if(amount_grown >= 100)
		var/num = rand(3, 12)
		for(var/i in 1 to num)
			var/obj/structure/spider/spiderling/S = new /obj/structure/spider/spiderling(loc)
			S.faction = faction.Copy()
			S.master_commander = master_commander
			if(player_spiders)
				S.player_spiders = 1
		qdel(src)

/obj/structure/spider/spiderling
	name = "spiderling"
	desc = "It never stays still for long."
	icon_state = "spiderling"
	anchored = 0
	layer = 2.75
	health = 3
	var/amount_grown = 0
	var/grow_as = null
	var/obj/machinery/atmospherics/unary/vent_pump/entry_vent
	var/travelling_in_vent = 0
	var/player_spiders = 0
	var/list/faction = list()
	var/selecting_player = 0

/obj/structure/spider/spiderling/New()
	..()
	pixel_x = rand(6,-6)
	pixel_y = rand(6,-6)
	START_PROCESSING(SSobj, src)

/obj/structure/spider/spiderling/Destroy()
	STOP_PROCESSING(SSobj, src)
	entry_vent = null
	return ..()

/obj/structure/spider/spiderling/Bump(atom/user)
	if(istype(user, /obj/structure/table))
		loc = user.loc
	else
		..()

/obj/structure/spider/spiderling/proc/die()
	visible_message("<span class='alert'>[src] dies!</span>")
	new /obj/effect/decal/cleanable/spiderling_remains(loc)
	qdel(src)

/obj/structure/spider/spiderling/healthcheck()
	if(health <= 0)
		die()

/obj/structure/spider/spiderling/process()
	if(travelling_in_vent)
		if(istype(loc, /turf))
			travelling_in_vent = 0
			entry_vent = null
	else if(entry_vent)
		if(get_dist(src, entry_vent) <= 1)
			var/list/vents = list()
			for(var/obj/machinery/atmospherics/unary/vent_pump/temp_vent in entry_vent.parent.other_atmosmch)
				vents.Add(temp_vent)
			if(!vents.len)
				entry_vent = null
				return
			var/obj/machinery/atmospherics/unary/vent_pump/exit_vent = pick(vents)
			if(prob(50))
				visible_message("<B>[src] scrambles into the ventilation ducts!</B>", \
								"<span class='notice'>You hear something squeezing through the ventilation ducts.</span>")

			spawn(rand(20,60))
				loc = exit_vent
				var/travel_time = round(get_dist(loc, exit_vent.loc) / 2)
				spawn(travel_time)

					if(!exit_vent || exit_vent.welded)
						loc = entry_vent
						entry_vent = null
						return

					if(prob(50))
						audible_message("<span class='notice'>You hear something squeezing through the ventilation ducts.</span>")
					sleep(travel_time)

					if(!exit_vent || exit_vent.welded)
						loc = entry_vent
						entry_vent = null
						return
					loc = exit_vent.loc
					entry_vent = null
					var/area/new_area = get_area(loc)
					if(new_area)
						new_area.Entered(src)
	//=================

	else if(prob(33))
		var/list/nearby = oview(10, src)
		if(nearby.len)
			var/target_atom = pick(nearby)
			walk_to(src, target_atom)
			if(prob(40))
				visible_message("<span class='notice'>[src] skitters[pick(" away"," around","")].</span>")
	else if(prob(10))
		//ventcrawl!
		for(var/obj/machinery/atmospherics/unary/vent_pump/v in view(7,src))
			if(!v.welded)
				entry_vent = v
				walk_to(src, entry_vent, 1)
				break
	if(isturf(loc))
		amount_grown += rand(0,2)
		if(amount_grown >= 100)
			if(!grow_as)
				grow_as = pick(typesof(/mob/living/simple_animal/hostile/poison/giant_spider))
			var/mob/living/simple_animal/hostile/poison/giant_spider/S = new grow_as(loc)
			S.faction = faction.Copy()
			S.master_commander = master_commander
			if(player_spiders && !selecting_player)
				selecting_player = 1
				spawn()
					var/list/candidates = pollCandidates("Do you want to play as a spider?", ROLE_GSPIDER, 1)

					if(candidates.len)
						var/mob/C = pick(candidates)
						if(C)
							S.key = C.key
							if(S.master_commander)
								to_chat(S, "<span class='biggerdanger'>You are a spider who is loyal to [S.master_commander], obey [S.master_commander]'s every order and assist [S.master_commander.p_them()] in completing [S.master_commander.p_their()] goals at any cost.</span>")
			qdel(src)

/obj/effect/decal/cleanable/spiderling_remains
	name = "spiderling remains"
	desc = "Green squishy mess."
	icon = 'icons/effects/effects.dmi'
	icon_state = "greenshatter"
	anchored = 1

/obj/structure/spider/cocoon
	name = "cocoon"
	desc = "Something wrapped in silky spider web"
	icon_state = "cocoon1"
	health = 60

/obj/structure/spider/cocoon/New()
	..()
	icon_state = pick("cocoon1","cocoon2","cocoon3")

/obj/structure/spider/cocoon/Destroy()
	visible_message("<span class='danger'>[src] splits open.</span>")
	for(var/atom/movable/A in contents)
		A.forceMove(loc)
	return ..()