/obj/effect/blob
	name = "pulsating mass"
	desc = "A pulsating mass of interwoven tendrils."
	icon = 'icons/mob/npc/blob.dmi'
	icon_state = "blob"
	light_range = 3
	light_power = 4
	light_color = BLOB_COLOR_PULS
	density = TRUE
	anchored = TRUE
	mouse_opacity = 2

	layer = BLOB_SHIELD_LAYER

	var/maxHealth = 30
	var/health
	var/regen_rate = 5

	// damage gets divided by these modifiers, based on damage type
	var/brute_resist = 4.3
	var/fire_resist = 0.8
	var/laser_resist = 2	// Special resist for laser based weapons - Emitters or handheld energy weaponry. Damage is divided by this and THEN by fire_resist.

	var/expandType = /obj/effect/blob
	var/secondary_core_growth_chance = 5 //% chance to grow a secondary blob core instead of whatever was supposed to grow. Secondary cores are considerably weaker, but still nasty.
	var/damage_min = 15
	var/damage_max = 25
	var/pruned = FALSE
	var/product = /obj/item/blob_tendril
	var/attack_time = 0
	var/attack_cooldown = 60 // time in deciseconds before next attack will occur

	var/obj/effect/blob/parent_core // the core this blob piece belongs to
	var/is_core = FALSE // determines how to pass core inheritance

/obj/effect/blob/Initialize()
	. = ..()
	health = maxHealth
	update_icon()
	START_PROCESSING(SSprocessing, src)

/obj/effect/blob/CanPass(var/atom/movable/mover, var/turf/target, var/height = 0, var/air_group = 0)
	if(air_group || height == 0)
		return TRUE
	return FALSE

/obj/effect/blob/ex_act(var/severity)
	switch(severity)
		if(1)
			take_damage(rand(100, 120) / brute_resist)
		if(2)
			take_damage(rand(60, 100) / brute_resist)
		if(3)
			take_damage(rand(20, 60) / brute_resist)

/obj/effect/blob/update_icon()
	if(health > maxHealth / 2)
		icon_state = "blob"
	else
		icon_state = "blob_damaged"

/obj/effect/blob/process()
	if(!parent_core || QDELETED(parent_core))
		take_damage(maxHealth / 4) // four processes to die if main core is deddo
		return
	regen()
	if(world.time < (attack_time + attack_cooldown))
		return
	attempt_attack()

/obj/effect/blob/proc/take_damage(var/damage)
	health -= damage
	if(health < 0)
		playsound(get_turf(src), 'sound/effects/splat.ogg', 50, TRUE)
		qdel(src)
	else
		update_icon()

/obj/effect/blob/proc/regen()
	health = min(health + regen_rate, maxHealth)
	update_icon()

/obj/effect/blob/proc/expand(var/turf/T)
	if(istype(T, /turf/space) || (isopenturf(T)) || (istype(T, /turf/simulated/mineral) && T.density))
		return
	if(istype(T, /turf/simulated/wall))
		var/turf/simulated/wall/SW = T
		SW.take_damage(80)
		return
	var/obj/structure/girder/G = locate() in T
	if(G)
		G.take_damage(rand(40, 80))
		return
	var/obj/structure/window/W = locate() in T
	if(W)
		W.shatter()
		return
	var/obj/structure/grille/GR = locate() in T
	if(GR)
		qdel(GR)
		return
	var/obj/structure/tank_wall/TW = locate() in T
	if(TW)
		TW.take_damage(rand(5,20))
		return
	for(var/obj/machinery/door/D in T) // There can be several - and some of them can be open, locate() is not suitable
		if(D.density)
			attack_door(D)
			if(D.health <= 0)
				if(!D.open(TRUE))
					D.visible_message(SPAN_WARNING("\The [src] bashes through \the [D], demolishing it!"))
					qdel(D)
			return
	var/obj/structure/foamedmetal/F = locate() in T
	if(F)
		F.visible_message(SPAN_WARNING("\The [src] lashes into \the [F], tearing it apart!"))
		qdel(F)
		return
	var/obj/structure/reagent_dispensers/RT = locate() in T
	if(RT)
		RT.visible_message(SPAN_WARNING("\The [src] pierces into \the [RT], blowing it apart!"))
		RT.ex_act(2)
		return
	var/obj/structure/inflatable/I = locate() in T
	if(I)
		I.visible_message(SPAN_WARNING("\The [src] rips into \the [F], tearing a hole into it!"))
		I.deflate(TRUE)
		return
	var/obj/vehicle/V = locate() in T
	if(V)
		V.ex_act(2)
		return
	var/obj/machinery/camera/CA = locate() in T
	if(CA && !(CA.stat & BROKEN))
		CA.take_damage(30)
		return

	// Above things, we destroy completely and thus can use locate. Mobs are different.
	for(var/mob/living/L in T)
		if(L.stat == DEAD)
			continue
		attack_living(L)

	var/inherited_core = parent_core
	if(is_core)
		inherited_core = src

	if(!(locate(/obj/effect/blob/core) in range(2, T)) && prob(secondary_core_growth_chance))
		var/obj/effect/blob/core/secondary/S = new /obj/effect/blob/core/secondary(T)
		S.parent_core = inherited_core
	else
		var/obj/effect/blob/B = new expandType(T, min(health, 30))
		B.parent_core = inherited_core

/obj/effect/blob/proc/pulse(var/forceLeft, var/list/dirs, var/bad_dir)
	sleep(4)
	var/pushDir = pick(dirs - bad_dir)
	var/turf/T = get_step(src, pushDir)
	var/obj/effect/blob/B = locate() in T
	if(!B)
		if(prob(health))
			var/retry = expand(T)
			if(retry)
				pulse(forceLeft - 1, dirs, pushDir)
	else if(forceLeft)
		B.pulse(forceLeft - 1, dirs - get_dir(B, src))

/obj/effect/blob/proc/attack_msg(atom/source)
	source.visible_message(SPAN_WARNING("A tendril flies out from \the [src] and smashes into \the [source]!"), SPAN_DANGER("A tendril flies out from \the [src] and smashes into you!"))
	playsound(get_turf(src), 'sound/effects/attackblob.ogg', 50, TRUE)

/obj/effect/blob/proc/attack_door(var/obj/machinery/door/D)
	if(!D)
		return
	attack_msg(D)
	D.take_damage(rand(damage_min, damage_max))

/obj/effect/blob/proc/attack_living(var/mob/living/L)
	if(!L)
		return
	var/blob_damage = pick(DAMAGE_BRUTE, DAMAGE_BURN)
	attack_msg(L)
	L.apply_damage(rand(damage_min, damage_max), blob_damage, used_weapon = "blob tendril")

/obj/effect/blob/proc/attempt_attack()
	var/mob/living/victim = locate() in view(1, src)
	if(victim)
		if(victim.stat == DEAD)
			return
		attack_living(victim)
		attack_time = world.time

/obj/effect/blob/bullet_act(var/obj/item/projectile/Proj)
	if(!Proj)
		return

	switch(Proj.damage_type)
		if(DAMAGE_BRUTE)
			take_damage(Proj.damage / brute_resist)
		if(DAMAGE_BURN)
			take_damage((Proj.damage / laser_resist) / fire_resist)
	return FALSE

/obj/effect/blob/attackby(obj/item/W, mob/user)
	user.setClickCooldown(DEFAULT_ATTACK_COOLDOWN)
	user.do_attack_animation(src)
	playsound(get_turf(src), 'sound/effects/attackblob.ogg', 50, TRUE)
	if(W.iswirecutter())
		if(!pruned)
			to_chat(user, SPAN_NOTICE("You collect a sample from \the [src]."))
			var/obj/P = new product(get_turf(user))
			user.put_in_hands(P)
			pruned = TRUE
			return
		else
			to_chat(user, SPAN_WARNING("\The [src] has already been pruned."))
			return

	var/damage = 0
	switch(W.damtype)
		if(DAMAGE_BURN)
			damage = (W.force / fire_resist)
			if(W.iswelder())
				playsound(get_turf(src), 'sound/items/Welder.ogg', 100, TRUE)
		if(DAMAGE_BRUTE)
			damage = (W.force / brute_resist)

	take_damage(damage)

/obj/effect/blob/fire_act()
	take_damage(rand(5, 20) / fire_resist)

#define CORE_SHIELD_HIGH "high"
#define CORE_SHIELD_LOW "low"

/obj/effect/blob/core
	name = "master nucleus"
	desc = "A massive, fragile nucleus guarded by a shield of thick tendrils."
	icon_state = "blob_core"
	maxHealth = 450
	damage_min = 25
	damage_max = 35
	expandType = /obj/effect/blob/shield
	product = /obj/item/blob_core
	is_core = TRUE

	light_color = BLOB_COLOR_CORE
	layer = BLOB_CORE_LAYER

	var/blob_may_process = TRUE
	var/reported_low_damage = FALSE
	var/pulse_power = 50 // How far the core can potentially grow in size
	var/times_to_pulse = 4

/obj/effect/blob/core/proc/get_health_percent()
	return ((health / maxHealth) * 100)

/obj/effect/blob/core/proc/process_core_health()
	var/health_percent = get_health_percent()
	if(health_percent > 75)
		if(reported_low_damage)
			report_shield_status(CORE_SHIELD_HIGH)
	else if(health_percent < 33)
		if(!reported_low_damage)
			report_shield_status(CORE_SHIELD_LOW)

/obj/effect/blob/core/proc/report_shield_status(var/status)
	if(status == CORE_SHIELD_LOW)
		visible_message(SPAN_DANGER("\The [src]'s internal tendril shield fails, leaving the nucleus vulnerable!"), 3)
		reported_low_damage = TRUE
	if(status == CORE_SHIELD_HIGH)
		visible_message(SPAN_DANGER("\The [src]'s internal tendril shield seems to have fully reformed."), 3)
		reported_low_damage = FALSE

// Rough icon state changes that reflect the core's health
/obj/effect/blob/core/update_icon()
	switch(get_health_percent())
		if(66 to INFINITY)
			icon_state = "blob_core"
		if(33 to 66)
			icon_state = "blob_node"
		if(-INFINITY to 33)
			icon_state = "blob_factory"

/obj/effect/blob/core/process()
	set waitfor = 0
	if(!blob_may_process)
		return
	blob_may_process = FALSE
	process_core_health()
	regen()
	for(var/i = 1 to times_to_pulse)
		pulse(pulse_power, global.cardinal.Copy())
	blob_may_process = TRUE
	if(world.time < (attack_time + attack_cooldown))
		return
	attempt_attack()

// Blob has a very small probability of growing these when spreading. These will spread the blob further.
/obj/effect/blob/core/secondary
	name = "auxiliary nucleus"
	desc = "An interwoven mass of tendrils. A glowing nucleus pulses at its center."
	icon_state = "blob_node"
	maxHealth = 125
	regen_rate = 1
	damage_min = 15
	damage_max = 20
	layer = BLOB_NODE_LAYER
	product = /obj/item/blob_core/aux
	pulse_power = 20 // Not as strong as big daddy core
	times_to_pulse = 4

/obj/effect/blob/core/secondary/process()
	if(!parent_core || QDELETED(parent_core))
		take_damage(maxHealth / 4) // four processes to die if main core is deddo
		return
	..()

/obj/effect/blob/core/secondary/process_core_health()
	return

/obj/effect/blob/core/secondary/update_icon()
	icon_state = (health / maxHealth >= 0.5) ? "blob_node" : "blob_factory"

/obj/effect/blob/shield
	name = "shielding mass"
	desc = "A pulsating mass of interwoven tendrils. These seem particularly robust, but not quite as active."
	icon_state = "blob_idle"
	maxHealth = 120
	damage_min = 15
	damage_max = 25
	attack_cooldown = 45
	regen_rate = 4
	opacity = TRUE
	expandType = /obj/effect/blob/ravaging
	light_color = BLOB_COLOR_SHIELD

/obj/effect/blob/shield/Initialize()
	. = ..()
	update_nearby_tiles()

/obj/effect/blob/shield/Destroy()
	density = FALSE
	update_nearby_tiles()
	return ..()

/obj/effect/blob/shield/update_icon()
	if(health > maxHealth * 2 / 3)
		icon_state = "blob_idle"
	else if(health > maxHealth / 3)
		icon_state = "blob"
	else
		icon_state = "blob_damaged"

/obj/effect/blob/shield/CanPass(var/atom/movable/mover, var/turf/target, var/height = 0, var/air_group = 0)
	return !density

/obj/effect/blob/ravaging
	name = "ravaging mass"
	desc = "A mass of interwoven tendrils. They thrash around haphazardly at anything in reach."
	maxHealth = 20
	damage_min = 20
	damage_max = 25
	attack_cooldown = 30
	light_color = BLOB_COLOR_RAV
	color = "#ffd400" //Temporary, for until they get a new sprite.

#define TENDRIL_SOLID "solid"
#define TENDRIL_FIRE "fire"

//produce
/obj/item/blob_tendril
	name = "asteroclast tendril"
	desc = "A tendril removed from an asteroclast. It's entirely lifeless."
	icon = 'icons/mob/npc/blob.dmi'
	icon_state = "tendril"
	item_state = "blob_tendril"
	w_class = ITEMSIZE_LARGE
	reach = 2 // long range tentacle whips - geeves
	attack_verb = list("smacked", "smashed", "whipped")
	var/types_of_tendril = list(TENDRIL_SOLID, TENDRIL_FIRE)

/obj/item/blob_tendril/Initialize()
	. = ..()
	var/tendril_type = pick(types_of_tendril)
	switch(tendril_type)
		if(TENDRIL_SOLID)
			desc = "An incredibly dense, yet flexible, tendril, removed from an asteroclast."
			force = 10
			color = COLOR_BRONZE
			origin_tech = list(TECH_MATERIAL = 2, TECH_BIO = 2)
		if(TENDRIL_FIRE)
			desc = "A tendril removed from an asteroclast. It's hot to the touch."
			damtype = DAMAGE_BURN
			force = 15
			color = COLOR_AMBER
			origin_tech = list(TECH_POWER = 2, TECH_BIO = 2)

/obj/item/blob_tendril/afterattack(obj/O, mob/user)
	if(prob(50))
		force--
		if(force <= 0)
			visible_message(SPAN_NOTICE("\The [src] crumbles apart!"))
			user.drop_from_inventory(src)
			new /obj/effect/decal/cleanable/ash(get_turf(src))
			qdel(src)

/obj/item/blob_core
	name = "asteroclast nucleus sample"
	desc = "A sample taken from an asteroclast's nucleus. It pulses with energy."
	icon_state = "core_sample"
	item_state = "blob_core"
	w_class = ITEMSIZE_NORMAL
	origin_tech = list(TECH_MATERIAL = 4, TECH_BLUESPACE = 5, TECH_BIO = 7)

/obj/item/blob_core/aux
	name = "asteroclast auxiliary nucleus sample"
	desc = "A sample taken from an asteroclast's auxiliary nucleus."
	icon_state = "core_sample_2"
	origin_tech = list(TECH_MATERIAL = 2, TECH_BLUESPACE = 3, TECH_BIO = 4)

#undef CORE_SHIELD_HIGH
#undef CORE_SHIELD_LOW
#undef TENDRIL_SOLID
#undef TENDRIL_FIRE