Paradise/code/modules/mob/mob_movement.dm

/mob/CanPass(atom/movable/mover, turf/target)
	var/horizontal = FALSE
	if(isliving(src))
		var/mob/living/L = src
		horizontal = IS_HORIZONTAL(L)

	if(isprojectile(mover))
		return projectile_hit_check(mover)
	if(mover.throwing)
		return (!density || horizontal || (mover.throwing?.get_thrower() == src))
	if(mover.checkpass(PASSMOB))
		return 1
	if(buckled == mover)
		return TRUE
	if(ismob(mover))
		var/mob/moving_mob = mover
		if(src in moving_mob.grab_do_not_move)
			return TRUE
		if(mover in buckled_mobs)
			return TRUE
	return (!mover.density || !density || horizontal)

/mob/proc/projectile_hit_check(obj/item/projectile/P)
	return !density

/client/verb/toggle_throw_mode()
	set hidden = 1
	if(iscarbon(mob))
		var/mob/living/carbon/C = mob
		C.toggle_throw_mode()
	else
		to_chat(usr, "<span class='danger'>This mob type cannot throw items.</span>")

/client/proc/Move_object(direct)
	if(mob && mob.control_object)
		if(mob.control_object.density)
			step(mob.control_object, direct)
			if(!mob.control_object)
				return
			mob.control_object.setDir(direct)
		else
			mob.control_object.forceMove(get_step(mob.control_object, direct))
	return

#define CONFUSION_LIGHT_COEFFICIENT		0.15
#define CONFUSION_HEAVY_COEFFICIENT		0.075
#define CONFUSION_MAX					80 SECONDS


/client/Move(n, direct)
	if(world.time < move_delay)
		return

	input_data.desired_move_dir_add = NONE
	input_data.desired_move_dir_sub = NONE

	var/old_move_delay = move_delay
	move_delay = world.time + world.tick_lag //this is here because Move() can now be called multiple times per tick
	if(!mob || !mob.loc)
		return 0

	if(!n || !direct) // why did we never check this before?
		return FALSE

	if(mob.notransform)
		return 0 //This is sota the goto stop mobs from moving var

	if(mob.throwing && mob.throwing.block_movement)
		return

	if(mob.control_object)
		return Move_object(direct)

	if(!isliving(mob))
		return mob.Move(n, direct)

	if(mob.stat == DEAD)
		mob.ghostize()
		return 0

	if(moving)
		return 0

	var/mob/living/living_mob = null
	if(isliving(mob))
		living_mob = mob
		if(living_mob.incorporeal_move)//Move though walls
			Process_Incorpmove(direct)
			return

	if(mob.remote_control) //we're controlling something, our movement is relayed to it
		return mob.remote_control.relaymove(mob, direct)

	if(isAI(mob))
		if(istype(mob.loc, /obj/item/aicard))
			var/obj/O = mob.loc
			return O.relaymove(mob, direct) // aicards have special relaymove stuff
		return AIMove(n, direct, mob)


	if(Process_Grab())
		return

	if(mob.buckled) //if we're buckled to something, tell it we moved.
		return mob.buckled.relaymove(mob, direct)

	if(living_mob && !(living_mob.mobility_flags & MOBILITY_MOVE))
		return

	if(!mob.lastarea)
		mob.lastarea = get_area(mob.loc)

	if(isobj(mob.loc) || ismob(mob.loc)) //Inside an object, tell it we moved
		var/atom/O = mob.loc
		return O.relaymove(mob, direct)

	if(!mob.Process_Spacemove(direct))
		return 0

	if(mob.restrained()) // Why being pulled while cuffed prevents you from moving
		for(var/mob/M in orange(1, mob))
			if(M.pulling == mob)
				if(!M.incapacitated() && mob.Adjacent(M))
					to_chat(src, "<span class='warning'>You're restrained! You can't move!</span>")
					move_delay = world.time + 10
					return 0
				else
					M.stop_pulling()


	var/delay = mob.movement_delay()
	if(old_move_delay + world.tick_lag > world.time)
		move_delay = old_move_delay
	else
		move_delay = world.time
	mob.last_movement = world.time

	delay = TICKS2DS(-round(-(DS2TICKS(delay)))) //Rounded to the next tick in equivalent ds


	if(locate(/obj/item/grab, mob))
		if(!isalienhunter(mob)) // i hate grab code
			delay += 7

	if(istype(living_mob))
		var/newdir = NONE
		var/confusion = living_mob.get_confusion()
		if(confusion > CONFUSION_MAX)
			newdir = pick(GLOB.alldirs)
		else if(prob(confusion * CONFUSION_HEAVY_COEFFICIENT))
			newdir = angle2dir(dir2angle(direct) + pick(90, -90))
		else if(prob(confusion * CONFUSION_LIGHT_COEFFICIENT))
			newdir = angle2dir(dir2angle(direct) + pick(45, -45))
		if(newdir)
			direct = newdir
			n = get_step(mob, direct)

	mob.last_movement_dir = direct

	var/prev_pulling_loc = null
	if(mob.pulling)
		prev_pulling_loc = mob.pulling.loc

	if(!(direct & (direct - 1))) // cardinal direction
		. = mob.SelfMove(n, direct, delay)
	else // diagonal movements take longer
		var/diag_delay = delay * SQRT_2
		. = mob.SelfMove(n, direct, diag_delay)
		if(mob.loc == n)
			// only incur the extra delay if the move was *actually* diagonal
			// There would be a bit of visual jank if we try to walk diagonally next to a wall
			// and the move ends up being cardinal, rather than diagonal,
			// but that's better than it being jank on every *successful* diagonal move.
			delay = diag_delay
	move_delay += delay

	if(mob.pulledby)
		mob.pulledby.stop_pulling()

	if(prev_pulling_loc && mob.pulling?.face_while_pulling && (mob.pulling.loc != prev_pulling_loc))
		mob.setDir(get_dir(mob, mob.pulling)) // Face welding tanks and stuff when pulling

	if(mob && . && mob.throwing)
		mob.throwing.finalize(FALSE)

#undef CONFUSION_LIGHT_COEFFICIENT
#undef CONFUSION_HEAVY_COEFFICIENT
#undef CONFUSION_MAX


/mob/proc/SelfMove(turf/n, direct, movetime)
	return Move(n, direct, movetime)

///Process_Grab()
///Called by client/Move()
///Checks to see if you are being grabbed and if so attemps to break it
/client/proc/Process_Grab()
	if(length(mob.grabbed_by))
		if(mob.incapacitated(FALSE, TRUE)) // Can't break out of grabs if you're incapacitated
			return TRUE
		if(HAS_TRAIT(mob, TRAIT_IMMOBILIZED))
			return TRUE //You can't move, so you can't break it by trying to move.
		var/list/grabbing = list()

		if(istype(mob.l_hand, /obj/item/grab))
			var/obj/item/grab/G = mob.l_hand
			grabbing += G.affecting

		if(istype(mob.r_hand, /obj/item/grab))
			var/obj/item/grab/G = mob.r_hand
			grabbing += G.affecting

		for(var/X in mob.grabbed_by)
			var/obj/item/grab/G = X
			switch(G.state)

				if(GRAB_PASSIVE)
					if(!grabbing.Find(G.assailant)) //moving always breaks a passive grab unless we are also grabbing our grabber.
						qdel(G)

				if(GRAB_AGGRESSIVE)
					move_delay = world.time + 10
					if(!prob(25))
						return TRUE
					mob.visible_message("<span class='danger'>[mob] has broken free of [G.assailant]'s grip!</span>")
					qdel(G)

				if(GRAB_NECK)
					move_delay = world.time + 10
					if(!prob(5))
						return TRUE
					mob.visible_message("<span class='danger'>[mob] has broken free of [G.assailant]'s headlock!</span>")
					qdel(G)
	return FALSE


///Process_Incorpmove
///Called by client/Move()
///Allows mobs to run though walls
/client/proc/Process_Incorpmove(direct)
	var/turf/mobloc = get_turf(mob)
	if(!isliving(mob))
		return
	var/mob/living/L = mob
	switch(L.incorporeal_move)
		if(INCORPOREAL_MOVE_NORMAL)
			L.forceMove(get_step(L, direct))
			L.dir = direct
		if(INCORPOREAL_MOVE_NINJA)
			if(prob(50))
				var/locx
				var/locy
				switch(direct)
					if(NORTH)
						locx = mobloc.x
						locy = (mobloc.y+2)
						if(locy>world.maxy)
							return
					if(SOUTH)
						locx = mobloc.x
						locy = (mobloc.y-2)
						if(locy<1)
							return
					if(EAST)
						locy = mobloc.y
						locx = (mobloc.x+2)
						if(locx>world.maxx)
							return
					if(WEST)
						locy = mobloc.y
						locx = (mobloc.x-2)
						if(locx<1)
							return
					else
						return
				L.forceMove(locate(locx,locy,mobloc.z))
				spawn(0)
					var/limit = 2//For only two trailing shadows.
					for(var/turf/T in get_line(mobloc, L.loc))
						new /obj/effect/temp_visual/dir_setting/ninja/shadow(T, L.dir)
						limit--
						if(limit<=0)
							break
			else
				new /obj/effect/temp_visual/dir_setting/ninja/shadow(mobloc, L.dir)
				L.forceMove(get_step(L, direct))
			L.dir = direct
		if(INCORPOREAL_MOVE_HOLY_BLOCK)
			var/turf/simulated/floor/stepTurf = get_step(L, direct)
			if(stepTurf.flags & BLESSED_TILE)
				to_chat(L, "<span class='warning'>Holy energies block your path.</span>")
				L.notransform = TRUE
				spawn(2)
					L.notransform = FALSE
			else
				L.forceMove(get_step(L, direct))
				L.dir = direct
	return TRUE


///Process_Spacemove
///Called by /client/Move()
///For moving in space
///Return 1 for movement 0 for none
/mob/Process_Spacemove(movement_dir = 0)
	if(..())
		return 1
	var/atom/movable/backup = get_spacemove_backup(movement_dir)
	if(backup)
		if(istype(backup) && movement_dir && !backup.anchored)
			var/opposite_dir = turn(movement_dir, 180)
			if(backup.newtonian_move(opposite_dir)) //You're pushing off something movable, so it moves
				to_chat(src, "<span class='notice'>You push off of [backup] to propel yourself.</span>")
		return 1
	return 0

/mob/get_spacemove_backup(movement_dir)
	for(var/A in orange(1, get_turf(src)))
		if(isarea(A))
			continue
		else if(isturf(A))
			var/turf/turf = A
			if(isspaceturf(turf))
				continue
			if(!turf.density && !mob_negates_gravity())
				continue
			return A
		else
			var/atom/movable/AM = A
			if(AM == buckled) //Kind of unnecessary but let's just be sure
				continue
			if(!AM.CanPass(src) || AM.density)
				if(AM.anchored)
					return AM
				if(pulling == AM)
					continue
				if(get_turf(AM) == get_step(get_turf(src), movement_dir)) // No pushing off objects in front of you, while simultaneously pushing them fowards to go faster in space.
					continue
				. = AM


/mob/proc/mob_has_gravity(turf/T)
	return has_gravity(src, T)

/mob/proc/mob_negates_gravity()
	return 0

/mob/proc/Move_Pulled(atom/A)
	if(HAS_TRAIT(src, TRAIT_CANNOT_PULL) || restrained() || !pulling)
		return
	if(pulling.anchored || pulling.move_resist > move_force || !pulling.Adjacent(src))
		stop_pulling()
		return
	if(isliving(pulling))
		var/mob/living/L = pulling
		if(L.buckled && L.buckled.buckle_prevents_pull) //if they're buckled to something that disallows pulling, prevent it
			stop_pulling()
			return
	if(A == loc && pulling.density)
		return
	if(!Process_Spacemove(get_dir(pulling.loc, A)))
		return
	if(src in pulling.contents)
		return
	var/target_turf = get_step(pulling, get_dir(pulling.loc, A))
	if(get_dist(target_turf, loc) > 1) // Make sure the turf we are trying to pull to is adjacent to the user.
		return // We do not use Adjacent() here because it checks if there are dense objects in the way, making it impossible to move an object to the side if we're blocked on both sides.
	if(ismob(pulling))
		var/mob/M = pulling
		var/atom/movable/t = M.pulling
		M.stop_pulling()
		. = step(pulling, get_dir(pulling.loc, A)) // we set the return value to step here, if we don't having someone buckled in to a chair and being pulled won't let them be unbuckeled
		if(M)
			M.start_pulling(t)
	else
		. = step(pulling, get_dir(pulling.loc, A))

/mob/proc/update_gravity(has_gravity)
	return

/client/proc/check_has_body_select()
	return mob && mob.hud_used && mob.hud_used.zone_select && istype(mob.hud_used.zone_select, /atom/movable/screen/zone_sel)

/client/verb/body_toggle_head()
	set name = "body-toggle-head"
	set hidden = 1

	if(!check_has_body_select())
		return

	var/next_in_line
	switch(mob.zone_selected)
		if(BODY_ZONE_HEAD)
			next_in_line = BODY_ZONE_PRECISE_EYES
		if(BODY_ZONE_PRECISE_EYES)
			next_in_line = BODY_ZONE_PRECISE_MOUTH
		else
			next_in_line = BODY_ZONE_HEAD

	var/atom/movable/screen/zone_sel/selector = mob.hud_used.zone_select
	selector.set_selected_zone(next_in_line, mob)

/client/verb/body_r_arm()
	set name = "body-r-arm"
	set hidden = 1
	if(!check_has_body_select())
		return

	var/next_in_line
	if(mob.zone_selected == BODY_ZONE_R_ARM)
		next_in_line = BODY_ZONE_PRECISE_R_HAND
	else
		next_in_line = BODY_ZONE_R_ARM

	var/atom/movable/screen/zone_sel/selector = mob.hud_used.zone_select
	selector.set_selected_zone(next_in_line, mob)

/client/verb/body_chest()
	set name = "body-chest"
	set hidden = 1

	if(!check_has_body_select())
		return

	var/atom/movable/screen/zone_sel/selector = mob.hud_used.zone_select
	selector.set_selected_zone(BODY_ZONE_CHEST, mob)

/client/verb/body_l_arm()
	set name = "body-l-arm"
	set hidden = 1

	if(!check_has_body_select())
		return

	var/next_in_line
	if(mob.zone_selected == BODY_ZONE_L_ARM)
		next_in_line = BODY_ZONE_PRECISE_L_HAND
	else
		next_in_line = BODY_ZONE_L_ARM

	var/atom/movable/screen/zone_sel/selector = mob.hud_used.zone_select
	selector.set_selected_zone(next_in_line, mob)

/client/verb/body_r_leg()
	set name = "body-r-leg"
	set hidden = 1

	if(!check_has_body_select())
		return

	var/next_in_line
	if(mob.zone_selected == BODY_ZONE_R_LEG)
		next_in_line = BODY_ZONE_PRECISE_R_FOOT
	else
		next_in_line = BODY_ZONE_R_LEG

	var/atom/movable/screen/zone_sel/selector = mob.hud_used.zone_select
	selector.set_selected_zone(next_in_line, mob)

/client/verb/body_groin()
	set name = "body-groin"
	set hidden = 1

	if(!check_has_body_select())
		return

	var/atom/movable/screen/zone_sel/selector = mob.hud_used.zone_select
	selector.set_selected_zone(BODY_ZONE_PRECISE_GROIN, mob)

/client/verb/body_l_leg()
	set name = "body-l-leg"
	set hidden = 1

	if(!check_has_body_select())
		return

	var/next_in_line
	if(mob.zone_selected == BODY_ZONE_L_LEG)
		next_in_line = BODY_ZONE_PRECISE_L_FOOT
	else
		next_in_line = BODY_ZONE_L_LEG

	var/atom/movable/screen/zone_sel/selector = mob.hud_used.zone_select
	selector.set_selected_zone(next_in_line, mob)

/client/verb/toggle_walk_run()
	set name = "toggle-walk-run"
	set hidden = TRUE
	set instant = TRUE
	if(mob)
		mob.toggle_move_intent()

/mob/proc/toggle_move_intent()
	if(iscarbon(src))
		var/mob/living/carbon/C = src
		if(C.legcuffed)
			to_chat(C, "<span class='notice'>You are legcuffed! You cannot run until you get [C.legcuffed] removed!</span>")
			C.m_intent = MOVE_INTENT_WALK	//Just incase
			C.hud_used.move_intent.icon_state = "walking"
			return

	var/icon_toggle
	if(m_intent == MOVE_INTENT_RUN)
		m_intent = MOVE_INTENT_WALK
		icon_toggle = "walking"
	else
		m_intent = MOVE_INTENT_RUN
		icon_toggle = "running"

	if(hud_used && hud_used.move_intent && hud_used.static_inventory)
		hud_used.move_intent.icon_state = icon_toggle
		for(var/atom/movable/screen/mov_intent/selector in hud_used.static_inventory)
			selector.update_icon()
	SEND_SIGNAL(src, COMSIG_MOVE_INTENT_TOGGLED)