Lesser drone nerfs (#6140)

# About the pull request

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# Explain why it's good for the game
Lesser drones can go for extremely high risk high reward strategies
without any risk as there is basically an infinite amount of respawns
and no punishment for dying.

I don't see why they should get a different treatment than huggers as
they can just run in and apply facehuggers manually or for going off
weeds to sneak into backline and place huggers on AFK marines they saw
from ghost or just running around being an annoyance.

And this is coming from a xeno main.
# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
fix: You can no longer infinitely extend facehugger's lifetime by
REDACTED
balance: Lessers now lose 5 hp every 2 seconds off weeds
/:cl:

---------

Co-authored-by: Drathek <[email protected]>

code/modules/mob/living/carbon/xenomorph/Facehuggers.dm

@@ -38,6 +38,9 @@
 	/// the nearest human before dying
 	var/jumps_left = 2
 
+	var/time_to_live = 30 SECONDS
+	var/death_timer
+
 	var/icon_xeno = 'icons/mob/xenos/effects.dmi'
 	var/icon_xenonid = 'icons/mob/xenonids/xenonid_crab.dmi'
 
@@ -55,6 +58,9 @@
 	set_hive_data(src, hivenumber)
 	go_active()
 
+	if (hivenumber != XENO_HIVE_TUTORIAL)
+		death_timer = addtimer(CALLBACK(src, PROC_REF(end_lifecycle)), time_to_live, TIMER_OVERRIDE|TIMER_STOPPABLE|TIMER_UNIQUE)
+
 
 /obj/item/clothing/mask/facehugger/Destroy()
 	. = ..()
@@ -75,6 +81,10 @@
 	if(QDESTROYING(src))
 		return
 	addtimer(CALLBACK(src, PROC_REF(check_turf)), 0.2 SECONDS)
+
+	if(!death_timer && hivenumber != XENO_HIVE_TUTORIAL)
+		death_timer = addtimer(CALLBACK(src, PROC_REF(end_lifecycle)), time_to_live, TIMER_OVERRIDE|TIMER_STOPPABLE|TIMER_UNIQUE)
+
 	if(stat == CONSCIOUS && loc) //Make sure we're conscious and not idle or dead.
 		go_idle()
 	if(attached)
@@ -173,9 +183,18 @@
 	if(exposed_temperature > 300)
 		die()
 
-/obj/item/clothing/mask/facehugger/equipped(mob/M)
+/obj/item/clothing/mask/facehugger/equipped(mob/holder)
 	SHOULD_CALL_PARENT(FALSE) // ugh equip sounds
 	// So picking up a hugger does not prematurely kill it
+	if (!isxeno(holder))
+		return
+
+	var/mob/living/carbon/xenomorph/xeno = holder
+
+	if ((xeno.caste.hugger_nurturing || hivenumber == XENO_HIVE_TUTORIAL) && death_timer)
+		deltimer(death_timer)
+		death_timer = null
+
 	go_idle()
 
 /obj/item/clothing/mask/facehugger/Crossed(atom/target)
@@ -410,6 +429,10 @@
 		deltimer(jump_timer)
 	jump_timer = null
 
+	if(death_timer)
+		deltimer(death_timer)
+	death_timer = null
+
 	if(!impregnated)
 		icon_state = "[initial(icon_state)]_dead"
 	stat = DEAD

code/modules/mob/living/carbon/xenomorph/castes/lesser_drone.dm

@@ -16,9 +16,10 @@
 	can_be_revived = FALSE
 
 	build_time_mult = BUILD_TIME_MULT_LESSER_DRONE
+	behavior_delegate_type = /datum/behavior_delegate/lesser_drone_base
 
 	caste_desc = "A builder of hives."
-	can_hold_facehuggers = 1
+	can_hold_facehuggers = TRUE
 	can_hold_eggs = CAN_HOLD_TWO_HANDS
 	acid_level = 1
 	weed_level = WEED_LEVEL_STANDARD
@@ -118,3 +119,10 @@
 
 /mob/living/carbon/xenomorph/lesser_drone/handle_ghost_message()
 	return
+
+/datum/behavior_delegate/lesser_drone_base
+	name = "Base Lesser Drone Behavior Delegate"
+
+/datum/behavior_delegate/lesser_drone_base/on_life()
+	if(bound_xeno.body_position == STANDING_UP && !(locate(/obj/effect/alien/weeds) in get_turf(bound_xeno)))
+		bound_xeno.adjustBruteLoss(5)