Bullosseum/tests/matador_charge_test.gd

extends SceneTree
## Charge-reliability test. A fast bull (dash ≈ 66 m/s ≈ 1.1 m/frame) moves far enough per physics
## frame to tunnel clean through the matador's thin HitArea, so the Area's body_entered never fires
## — "my charge goes right through them." matador.gd now sweeps the bull's actual travel (prev → now)
## each frame and gores any matador on the path (_sweep_bull_gore), and a committed charge pierces the
## survival roll (mat_charge_pierce). This drives a tunnelling pass whose endpoints both sit OUTSIDE
## the gore radius — so only the swept test can catch it — and asserts: (a) the charge still connects,
## (b) a full-speed charge gores (kills) rather than being rolled off, and (c) a slow bump at the hit
## threshold still lets the matador roll clear.
## Run: godot --headless --script res://tests/matador_charge_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() -> CharacterBody3D:
	var bull := CharacterBody3D.new()
	bull.set_script(load("res://tests/_fake_bull.gd"))   # exposes is_dashing()/is_rolling()
	bull.collision_layer = 2
	bull.collision_mask = 0
	bull.add_to_group(&"player")
	var cs := CollisionShape3D.new()
	var shape := CapsuleShape3D.new()
	shape.radius = 0.75
	shape.height = 1.845
	cs.shape = shape
	bull.add_child(cs)
	root.add_child(bull)
	return bull


func _make_matador(_bull: CharacterBody3D) -> CharacterBody3D:
	var mat := (load("res://Matador.tscn") as PackedScene).instantiate() as CharacterBody3D
	root.add_child(mat)
	mat.global_position = Vector3.ZERO
	mat.set_physics_process(false)   # we drive the swept gore ourselves, isolated from the AI
	await physics_frame
	mat.call("_acquire_bull")
	return mat


# Sweep the bull straight across the matador at `speed`: seed the previous position at from_x (too
# far to gore), then teleport to to_x so the prev → now segment passes through the matador at x=0.
func _charge_pass(mat: CharacterBody3D, bull: CharacterBody3D, speed: float, from_x: float, to_x: float) -> void:
	bull.global_position = Vector3(from_x, 0.0, 0.0)
	bull.velocity = Vector3(speed, 0.0, 0.0)
	mat.call("_sweep_bull_gore")
	bull.global_position = Vector3(to_x, 0.0, 0.0)
	mat.call("_sweep_bull_gore")


func _run() -> void:
	var dp := root.get_node("/root/DP")
	var gore_r: float = dp.f("mat_charge_gore_radius")
	var thr: float = dp.f("mat_hit_threshold")
	_ok(2.0 > gore_r, "test pass tunnels: endpoints (2 m) sit outside the gore radius (%.2f m)" % gore_r)

	# One shared bull — matadors acquire the sole node in the "player" group, so every scenario
	# sweeps the same body (a second bull would leave later matadors reading the wrong, stale one).
	var bull := _make_bull()

	# (a) A dash-speed pass that leaps clean over the HitArea must still connect. Force the roll so
	# the reaction is a clean, ragdoll-free state change proving detection.
	dp.call("set_value", "mat_charge_pierce", 0.0)
	dp.call("set_value", "mat_roll_chance", 1.0)
	var mat_a: CharacterBody3D = await _make_matador(bull)
	_charge_pass(mat_a, bull, 66.0, -2.0, 2.0)
	_ok(mat_a.call("ai_state_name") == "ROLL", "a dash that tunnels the HitArea still connects (matador reacts)")

	# (b) A full-speed charge pierces the survival roll and gores — even forced roll_chance can't save it.
	dp.call("set_value", "mat_charge_pierce", 1.0)
	dp.call("set_value", "mat_roll_chance", 1.0)
	var mat_b: CharacterBody3D = await _make_matador(bull)
	_charge_pass(mat_b, bull, 66.0, -2.0, 2.0)
	_ok(mat_b.call("ai_state_name") == "RAGDOLL", "a full-speed charge pierces the roll and gores the matador")

	# (c) The pierce only bites at speed: a slow bump at the hit threshold still lets them roll clear.
	var mat_c: CharacterBody3D = await _make_matador(bull)
	_charge_pass(mat_c, bull, thr, -2.0, 2.0)
	_ok(mat_c.call("ai_state_name") == "ROLL", "a slow bump at the threshold still rolls clear")

	# (d) Horns-first only: a fast pass with the matador BEHIND the bull's heading (it charges away,
	# 0.5 → 3, matador at 0) doesn't gore, even though the swept path passes within reach.
	dp.call("set_value", "mat_charge_pierce", 0.0)
	dp.call("set_value", "mat_roll_chance", 1.0)
	var mat_d: CharacterBody3D = await _make_matador(bull)
	_charge_pass(mat_d, bull, 66.0, 0.5, 3.0)
	_ok(mat_d.call("ai_state_name") == "WANDER", "a charge moving away from the matador doesn't gore (horns-first)")

	# (e) The DASH ability is a committed lunge: even the not-horns-first pass connects (is_dashing
	# bypasses the cone) AND is a guaranteed kill — roll_chance forced to 1.0 still RAGDOLLS, not rolls.
	dp.call("set_value", "mat_roll_chance", 1.0)
	dp.call("set_value", "mat_charge_pierce", 0.0)
	bull.set("dashing", true)
	var mat_e: CharacterBody3D = await _make_matador(bull)
	_charge_pass(mat_e, bull, 66.0, 0.5, 3.0)
	_ok(mat_e.call("ai_state_name") == "RAGDOLL", "a dash connect is a guaranteed kill (no survival roll)")
	bull.set("dashing", false)

	_finish()


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