Bullosseum/tests/bear_hitbox_test.gd

extends SceneTree
## Bear attack-collider test. The colliders + their motion live in BearAttackHitboxes.tscn: the
## leap slam is a ground circle (cylinder) whose "leap_slam" clip pops it open; the overhead smash
## is a forward box lane whose "smash_travel" clip grows it out from the bear. bear.gd fires the
## clip, arms the knock-up shaping, and sweeps while it runs. This asserts: a bull anywhere in the
## leap circle is mauled AND launched by default (bear_leap_ring_frac 0), while raising ring_frac
## carves a grounded inner zone; the smash lane catches bulls near AND far as the front travels,
## throws the further one higher, and spares anything off the lane.
## Run: godot --headless --script res://tests/bear_hitbox_test.gd

var _pass := 0
var _fail := 0


func _init() -> void:
	_run.call_deferred()


func _ok(c: bool, m: String) -> void:
	if c:
		_pass += 1
		print("  PASS: ", m)
	else:
		_fail += 1
		print("  FAIL: ", m)


func _make_bull(pos: Vector3) -> CharacterBody3D:
	var b := CharacterBody3D.new()
	b.collision_layer = 2   # PhysicsLayers.BULL — what the hitboxes mask
	b.collision_mask = 0
	b.add_to_group(&"player")
	b.set_script(load("res://tests/_fake_bull.gd"))
	var cs := CollisionShape3D.new()
	var shape := SphereShape3D.new()
	shape.radius = 0.6
	cs.shape = shape
	b.add_child(cs)
	root.add_child(b)
	b.global_position = pos
	return b


# Drive one attack collider clip to completion, sweeping each physics frame like _physics_process.
func _drive(bear: Node, fire: String) -> void:
	bear.call(fire)
	for i in 60:
		bear.call("_tick_attack_hitbox")
		await physics_frame
		if bear.get("_active_hitbox") == null:
			break


func _run() -> void:
	var bear := (load("res://Bear.tscn") as PackedScene).instantiate() as Node3D
	root.add_child(bear)
	bear.set_physics_process(false)   # freeze the AI; we fire the colliders ourselves
	await physics_frame

	var leap_hb := bear.find_child("LeapSlamHitbox", true, false) as Area3D
	var smash_hb := bear.find_child("SmashHitbox", true, false) as Area3D
	_ok(leap_hb != null, "leap slam cylinder hitbox exists (from BearAttackHitboxes.tscn)")
	_ok(smash_hb != null, "overhead smash lane hitbox exists (from BearAttackHitboxes.tscn)")
	if leap_hb == null or smash_hb == null:
		_finish()
		return

	var dp := root.get_node("/root/DP")
	var slam_r: float = (leap_hb.get_node("CollisionShape3D").shape as CylinderShape3D).radius
	var lane: float = (smash_hb.get_node("CollisionShape3D").shape as BoxShape3D).size.z

	# ── Leap slam: by default (bear_leap_ring_frac 0) the bull is launched from ANYWHERE in the
	# circle — no safe inner spot. Off the circle is still spared.
	dp.call("set_value", "bear_leap_ring_frac", 0.0)
	var center := _make_bull(Vector3(0.0, 0.5, 0.0))
	var midring := _make_bull(Vector3(slam_r * 0.5, 0.5, 0.0))
	var outside := _make_bull(Vector3(slam_r + 3.0, 0.5, 0.0))
	await physics_frame
	await _drive(bear, "_fire_leap_hitbox")
	_ok(center.hits >= 1 and center.knocked_up > 0.0, "bull at the circle center is mauled AND launched")
	_ok(midring.hits >= 1 and midring.knocked_up > 0.0, "bull mid-circle is mauled AND launched")
	_ok(outside.hits == 0, "bull outside the slam radius is spared")
	center.queue_free()
	midring.queue_free()
	outside.queue_free()
	await physics_frame

	# Raising ring_frac restores a grounded inner zone that only mauls (the slider still works).
	dp.call("set_value", "bear_leap_ring_frac", 0.75)
	var frac: float = dp.f("bear_leap_ring_frac")
	var inner := _make_bull(Vector3(slam_r * (frac * 0.5), 0.5, 0.0))
	var ring := _make_bull(Vector3(slam_r * (frac + (1.0 - frac) * 0.5), 0.5, 0.0))
	await physics_frame
	await _drive(bear, "_fire_leap_hitbox")
	_ok(inner.hits >= 1 and inner.knocked_up == 0.0, "raised ring_frac keeps the inner circle grounded")
	_ok(ring.knocked_up > 0.0, "raised ring_frac still launches the outer ring")
	inner.queue_free()
	ring.queue_free()
	dp.call("set_value", "bear_leap_ring_frac", 0.0)
	await physics_frame

	# ── Overhead smash: the lane's leading edge travels the whole way, so bulls near AND far are
	# both caught as the front passes; the further one is thrown higher. Off-lane is spared.
	var near := _make_bull(Vector3(0.0, 0.5, lane * 0.2))
	var far := _make_bull(Vector3(0.0, 0.5, lane * 0.8))
	var beside := _make_bull(Vector3(lane * 0.5, 0.5, lane * 0.5))
	var behind := _make_bull(Vector3(0.0, 0.5, -3.0))
	await physics_frame
	await _drive(bear, "_begin_smash_hitbox")
	_ok(near.hits >= 1, "bull near the bear is caught as the shockwave starts")
	_ok(far.hits >= 1, "bull far down the lane is caught when the front reaches it")
	_ok(far.knocked_up > near.knocked_up, "the further hit is thrown higher")
	_ok(beside.hits == 0, "bull beside the lane is spared (a lane, not a circle)")
	_ok(behind.hits == 0, "bull behind the bear is spared")

	_finish()


func _finish() -> void:
	print("Results: %d passed, %d failed" % [_pass, _fail])
	quit(1 if _fail > 0 else 0)