Human vs human AA tower

code/__DEFINES/__game.dm

@@ -494,6 +494,9 @@
 #define TURF_PROTECTION_CAS 2
 #define TURF_PROTECTION_OB 3
 
+#define TURF_AA_PROTECTION_CAS_COVERED 4
+#define TURF_AA_PROTECTION_CAS_RESTRICTED 5
+
 /// Convert a turf protection level to a ceiling protection level
 /proc/get_ceiling_protection_level(turf_protection_level)
 	switch(turf_protection_level)

code/game/machinery/computer/dropship_weapons.dm

@@ -470,6 +470,9 @@
 			if(CEILING_IS_PROTECTED(location_area.ceiling, CEILING_PROTECTION_TIER_1))
 				to_chat(user, SPAN_WARNING("Target is obscured."))
 				return FALSE
+			if (!aa_protection_check(location, user))
+				return FALSE
+
 			var/equipment_tag = params["equipment_id"]
 			for(var/obj/structure/dropship_equipment/equipment as anything in shuttle.equipments)
 				var/mount_point = equipment.ship_base.attach_id
@@ -699,6 +702,9 @@
 		if (protected_by_pylon(TURF_PROTECTION_CAS, TU))
 			to_chat(weapon_operator, SPAN_WARNING("INVALID TARGET: biological-pattern interference with signal."))
 			return FALSE
+
+		if (!aa_protection_check(TU, weapon_operator))
+			return FALSE
 		if(!DEW.ammo_equipped.can_fire_at(TU, weapon_operator))
 			return FALSE
 
@@ -801,6 +807,25 @@
 	update_location(weapons_operator, cas_sig)
 	return TRUE
 
+/obj/structure/machinery/computer/dropship_weapons/proc/aa_protection_check(turf/target, mob/weapon_operator)
+	var/obj/docking_port/mobile/marine_dropship/dropship = SSshuttle.getShuttle(shuttle_tag)
+	var/obj/structure/machinery/defenses/planetary_anti_air/highest_aa = target.get_aa_with_highest_protection_level(faction)
+	if (!highest_aa)
+		return
+
+	switch(highest_aa.get_protection_level(target))
+		if(TURF_AA_PROTECTION_CAS_COVERED)
+			to_chat(weapon_operator, SPAN_WARNING("WARNING: AA protection persist in area."))
+			highest_aa.fire()
+			dropship.on_planetary_aa_interception()
+			return TRUE
+		if(TURF_AA_PROTECTION_CAS_RESTRICTED)
+			to_chat(weapon_operator, SPAN_WARNING("WARNING: strong AA protection persist in area. Perfoming an evasive maneuver"))
+			highest_aa.fire()
+			dropship.on_planetary_aa_interception_heavy()
+			return FALSE
+	return TRUE
+
 /obj/structure/machinery/computer/dropship_weapons/proc/initiate_firemission(mob/user, fmId, dir, offset_x, offset_y)
 	set waitfor = 0
 	var/obj/docking_port/mobile/marine_dropship/dropship = SSshuttle.getShuttle(shuttle_tag)
@@ -819,6 +844,8 @@
 		source.y + offset_y,
 		source.z
 	)
+	if (!aa_protection_check(target, user))
+		return FALSE
 	var/result = firemission_envelope.execute_firemission(recorded_loc, target, dir, fmId)
 	if(result != FIRE_MISSION_ALL_GOOD)
 		to_chat(user, SPAN_WARNING("Screen beeps with an error: [firemission_envelope.mission_error]"))

code/game/turfs/turf.dm

@@ -29,6 +29,7 @@
 	var/intact_tile = 1 //used by floors to distinguish floor with/without a floortile(e.g. plating).
 	var/can_bloody = TRUE //Can blood spawn on this turf?
 	var/list/linked_pylons
+	var/list/linked_aa
 	var/obj/effect/alien/weeds/weeds
 
 	var/list/datum/automata_cell/autocells
@@ -386,6 +387,7 @@
 	// return src
 
 	var/pylons = linked_pylons
+	var/aa_to_copy = linked_aa
 
 	var/list/old_baseturfs = baseturfs
 
@@ -413,6 +415,7 @@
 		W.baseturfs = old_baseturfs
 
 	W.linked_pylons = pylons
+	W.linked_aa = aa_to_copy
 
 	W.hybrid_lights_affecting = old_hybrid_lights_affecting
 	W.dynamic_lumcount = dynamic_lumcount
@@ -732,6 +735,28 @@
 
 	return protection_level
 
+/turf/proc/get_aa_with_highest_protection_level(faction)
+	var/obj/structure/machinery/defenses/planetary_anti_air/highest_aa = null
+	var/protection_level = TURF_PROTECTION_NONE
+
+	for (var/obj/structure/machinery/defenses/planetary_anti_air/planetary_aa in src.linked_aa)
+		if (!(faction in planetary_aa.faction_group))
+			var/protection_lvl = planetary_aa.get_protection_level(src)
+			if(protection_lvl > protection_level)
+				protection_level = protection_lvl
+				highest_aa = planetary_aa
+	return highest_aa
+
+/turf/proc/get_aa_protection_level(faction)
+	var/protection_level = TURF_PROTECTION_NONE
+	for (var/obj/structure/machinery/defenses/planetary_anti_air/planetary_aa in src.linked_aa)
+		if (!(faction in planetary_aa.faction_group))
+			var/protection_lvl = planetary_aa.get_protection_level(src)
+			if(protection_lvl > protection_level)
+				protection_level = protection_lvl
+
+	return protection_level
+
 GLOBAL_LIST_INIT(blacklisted_automated_baseturfs, typecacheof(list(
 	/turf/open/space,
 	/turf/baseturf_bottom,

code/modules/defenses/aa_tower.dm

@@ -0,0 +1,265 @@
+#define DROPSIP_TIME_REDUCTION_IF_IN_AA_ZONE 0.9
+
+/obj/structure/machinery/defenses/planetary_anti_air
+	name = "\improper Planetary AA"
+	desc = "\improper The Planetary AA provides cover from aerial attacks"
+	icon = 'icons/obj/structures/machinery/defenses/aa_tower.dmi'
+	icon_state = ""
+	can_be_near_defense = TRUE
+	defense_icon = null
+	faction_group = FACTION_LIST_MARINE
+	bound_width = 32
+	bound_height = 32
+	pixel_x = -15
+	pixel_y = -8
+	hack_time = 300
+	disassemble_time = 150
+	health = 500
+	health_max = 500
+	var/luminosity_strength = 2
+	anchored = FALSE
+	placed = FALSE
+	static = TRUE
+	encryptable = FALSE
+	var/anchor_time = 40
+
+	//CAS cant operate in area
+	var/restricted_range = 20
+	//CAS can operate but will get some effects
+	var/covered_range = 40
+
+	var/linked_turfs_restricted = list()
+	var/linked_turfs_covered = list()
+
+	var/last_fired = 0
+	var/fire_delay = 30
+
+/obj/structure/machinery/defenses/planetary_anti_air/proc/fire()
+	if(!(world.time - last_fired >= fire_delay) || !turned_on || health <= 0)
+		return
+
+	playsound(loc, 'sound/machines/twobeep.ogg', 50, 1)
+	sleep(3)
+	visible_message("[icon2html(src, viewers(src))] [SPAN_WARNING("The [name] fires projectiles into air!")]")
+	playsound(loc, 'sound/weapons/vehicles/autocannon_fire.ogg', 50, 1)
+	sleep(0.5)
+	playsound(loc, 'sound/weapons/vehicles/autocannon_fire.ogg', 50, 1)
+	last_fired = world.time
+
+/obj/structure/machinery/defenses/planetary_anti_air/get_examine_text(mob/user)
+	var/message = ""
+	if (health <= 0)
+		message += "It appears to be completely broken."
+		return list(message)
+	if(stat == DEFENSE_DAMAGED)
+		message += "It does not appear to be working.\n"
+	if(ishuman(user))
+		if (FACTION_UPP in faction_group)
+			message += SPAN_INFO("It is currently allied to [FACTION_UPP].") + "\n"
+		if (FACTION_MARINE in faction_group)
+			message += SPAN_INFO("It is currently allied to [FACTION_MARINE].") + "\n"
+		message += SPAN_INFO("It has [SPAN_HELPFUL("[health]/[health_max]")] health.")
+	return list(message)
+
+/obj/structure/machinery/defenses/planetary_anti_air/attackby(obj/item/O as obj, mob/user as mob)
+	if(QDELETED(O))
+		return
+
+	if(HAS_TRAIT(O, TRAIT_TOOL_MULTITOOL))
+		if(!friendly_faction(user.faction))
+			to_chat(user, SPAN_WARNING("This doesn't seem safe..."))
+			var/additional_shock = 1
+			if(!do_after(user, hack_time * user.get_skill_duration_multiplier(SKILL_CONSTRUCTION), INTERRUPT_ALL|BEHAVIOR_IMMOBILE, BUSY_ICON_BUILD, src))
+				additional_shock++
+			if(prob(50))
+				var/mob/living/carbon/human/H = user
+				if(!skillcheck(user, SKILL_ENGINEER, SKILL_ENGINEER_NOVICE))
+					if(turned_on)
+						additional_shock++
+					H.electrocute_act(40, src, additional_shock)//god damn Hans...
+					setDir(get_dir(src, H))//Make sure he died
+					power_off()
+					power_on()
+					return
+				else
+					H.electrocute_act(20, src)//god bless him for stupid move
+					return
+			if(additional_shock >= 2)
+				return
+			LAZYCLEARLIST(faction_group)
+			for(var/i in user.faction_group)
+				LAZYADD(faction_group, i)
+			to_chat(user, SPAN_WARNING("You've hacked \the [src], it's now ours!"))
+			return
+
+		if(!skillcheck(user, SKILL_ENGINEER, SKILL_ENGINEER_NOVICE))
+			to_chat(user, SPAN_WARNING("You don't have the training to do this."))
+			return
+
+		if(static)
+			to_chat(user, SPAN_WARNING("\The [src] is bolted to the ground!"))
+			return
+
+		user.visible_message(SPAN_NOTICE("[user] begins disassembling \the [src]."), SPAN_NOTICE("You begin disassembling \the [src]."))
+
+		if(!do_after(user, disassemble_time * user.get_skill_duration_multiplier(SKILL_CONSTRUCTION), INTERRUPT_ALL|BEHAVIOR_IMMOBILE, BUSY_ICON_BUILD, src))
+			return
+
+		if(health < health_max * 0.25) //repeat check
+			to_chat(user, SPAN_WARNING("\The [src] is too damaged to pick up!"))
+			return
+
+		user.visible_message(SPAN_NOTICE("[user] disassembles [src]."), SPAN_NOTICE("You disassemble [src]."))
+
+		playsound(loc, 'sound/mecha/mechmove04.ogg', 30, 1)
+		var/turf/T = get_turf(src)
+		power_off()
+		HD.forceMove(T)
+		transfer_label_component(HD)
+		HD.dropped = 1
+		HD.update_icon()
+		placed = 0
+		forceMove(HD)
+
+		return
+
+	if(HAS_TRAIT(O, TRAIT_TOOL_WRENCH))
+		if(anchored)
+			if(turned_on)
+				to_chat(user, SPAN_WARNING("[src] is currently active. You need to deactivate it first."))
+				return
+			user.visible_message(SPAN_NOTICE("[user] begins unanchoring [src] from the ground."),
+			SPAN_NOTICE("You begin unanchoring [src] from the ground."))
+
+			if(!do_after(user, anchor_time * user.get_skill_duration_multiplier(SKILL_CONSTRUCTION), INTERRUPT_ALL|BEHAVIOR_IMMOBILE, BUSY_ICON_BUILD, src))
+				return
+			user.visible_message(SPAN_NOTICE("[user] unanchors [src] from the ground."),
+			SPAN_NOTICE("You unanchor [src] from the ground."))
+			anchored = FALSE
+			playsound(src.loc, 'sound/items/Ratchet.ogg', 25, 1)
+			return
+		else
+			var/turf/T = get_turf(src)
+			var/area/area = get_area(T)
+			if(CEILING_IS_PROTECTED(area.ceiling, CEILING_PROTECTION_TIER_1) || !is_ground_level(T.z))
+				to_chat(user, SPAN_RED("You realize how bad of an idea this is and quickly stop."))
+				return
+
+			var/turf/open/floor = get_turf(src)
+			if(!floor.allow_construction)
+				to_chat(user, SPAN_WARNING("You cannot secure \the [src] here, find a more secure surface!"))
+				return FALSE
+			user.visible_message(SPAN_NOTICE("[user] begins securing [src] to the ground."),
+			SPAN_NOTICE("You begin securing [src] to the ground."))
+
+			if(!do_after(user, anchor_time * user.get_skill_duration_multiplier(SKILL_CONSTRUCTION), INTERRUPT_ALL|BEHAVIOR_IMMOBILE, BUSY_ICON_BUILD, src))
+				return
+			user.visible_message(SPAN_NOTICE("[user] secures [src] to the ground."),
+			SPAN_NOTICE("You secure [src] to the ground."))
+			anchored = TRUE
+			playsound(loc, 'sound/items/Ratchet.ogg', 25, 1)
+			return
+
+	if(iswelder(O))
+		if(!HAS_TRAIT(O, TRAIT_TOOL_BLOWTORCH))
+			to_chat(user, SPAN_WARNING("You need a stronger blowtorch!"))
+			return
+		var/obj/item/tool/weldingtool/WT = O
+		if(health < 0)
+			to_chat(user, SPAN_WARNING("[src]'s internal circuitry is ruined, there's no way you can salvage this on the go."))
+			return
+
+		if(health >= health_max)
+			to_chat(user, SPAN_WARNING("[src] isn't in need of repairs."))
+			return
+
+		if(WT.remove_fuel(0, user))
+			user.visible_message(SPAN_NOTICE("[user] begins repairing [src]."),
+			SPAN_NOTICE("You begin repairing [src]."))
+			if(do_after(user, 20 * user.get_skill_duration_multiplier(SKILL_CONSTRUCTION), INTERRUPT_ALL|BEHAVIOR_IMMOBILE, BUSY_ICON_FRIENDLY, src))
+				user.visible_message(SPAN_NOTICE("[user] repairs [src]."),
+				SPAN_NOTICE("You repair [src]."))
+				if(stat == DEFENSE_DAMAGED)
+					stat &= ~DEFENSE_DAMAGED
+				update_health(-50)
+				playsound(src.loc, 'sound/items/Welder2.ogg', 25, 1)
+		return
+
+	return TRUE
+
+/obj/structure/machinery/defenses/planetary_anti_air/update_icon()
+	if(turned_on)
+		if (FACTION_UPP in faction_group)
+			icon_state = "aa_upp"
+		else
+			icon_state = "aa_uscm"
+	else if(health <= 0)
+		icon_state = "aa_destroyed"
+	else
+		icon_state = "aa_off"
+
+/obj/structure/machinery/defenses/planetary_anti_air/upp
+	icon = 'icons/obj/structures/machinery/defenses/aa_tower.dmi'
+	icon_state = "aa_upp"
+	faction_group = FACTION_LIST_UPP
+
+/obj/structure/machinery/defenses/planetary_anti_air/proc/get_protection_level(turf/TU)
+	if (TU in linked_turfs_restricted)
+		return TURF_AA_PROTECTION_CAS_RESTRICTED
+	if (TU in linked_turfs_covered)
+		return TURF_AA_PROTECTION_CAS_COVERED
+	return TURF_PROTECTION_NONE
+
+/obj/structure/machinery/defenses/planetary_anti_air/power_on_action(mob/user)
+	var/turf/T = get_turf(src)
+	var/area/area = get_area(T)
+
+	if(CEILING_IS_PROTECTED(area.ceiling, CEILING_PROTECTION_TIER_1))
+		to_chat(user, SPAN_RED("[name] must be in the open air."))
+		return
+	if(!is_ground_level(T.z))
+		to_chat(user, SPAN_RED("You realize how bad of an idea this is and quickly stop."))
+		return
+
+	set_light(luminosity_strength)
+	visible_message("[icon2html(src, viewers(src))] [SPAN_NOTICE("The [name] hums to life and emits several beeps.")]")
+
+	for(var/turf/A as anything in RANGE_TURFS(covered_range, loc))
+		LAZYADD(A.linked_aa, src)
+		linked_turfs_covered += A
+	for(var/turf/A as anything in RANGE_TURFS(restricted_range, loc))
+		linked_turfs_restricted += A
+
+/obj/structure/machinery/defenses/planetary_anti_air/proc/remove_protected_area()
+	for(var/turf/A as anything in RANGE_TURFS(covered_range, loc))
+		LAZYREMOVE(A.linked_aa, src)
+		linked_turfs_covered -= A
+	for(var/turf/A as anything in RANGE_TURFS(restricted_range, loc))
+		linked_turfs_restricted -= A
+
+/obj/structure/machinery/defenses/planetary_anti_air/power_off_action(mob/user)
+	set_light(0)
+	visible_message("[icon2html(src, viewers(src))] [SPAN_NOTICE("The [name] powers down and goes silent.")]")
+	remove_protected_area()
+
+/obj/structure/machinery/defenses/planetary_anti_air/Destroy()
+	remove_protected_area()
+	update_icon()
+	. = ..()
+
+/obj/structure/machinery/defenses/planetary_anti_air/destroyed_action()
+	remove_protected_area()
+	visible_message("[icon2html(src, viewers(src))] [SPAN_WARNING("The [name] starts spitting out sparks and smoke!")]")
+	playsound(loc, 'sound/mecha/critdestrsyndi.ogg', 25, 1)
+	sleep(10)
+	cell_explosion(loc, 20, 20, EXPLOSION_FALLOFF_SHAPE_LINEAR, null, create_cause_data("AA tower explosion"))
+	update_icon()
+
+/obj/structure/machinery/defenses/planetary_anti_air/damaged_action(damage)
+	if(health < health_max * 0.15)
+		visible_message(SPAN_DANGER("[icon2html(src, viewers(src))] The [name] cracks and breaks apart!"))
+		stat |= DEFENSE_DAMAGED
+		turned_on = FALSE
+		remove_protected_area()
+		set_light(0)
+		update_icon()