extends SceneTree
## Smoke test for the FX library: every registered effect instantiates and attaches without error,
## and an unknown name fails soft (returns null, no crash). Catches a broken effect .tscn before it
## ships. Run: godot --headless --script tests/fx_gallery_test.gd

var _pass := 0
var _fail := 0


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


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


func _run() -> void:
	var fx: Node = root.get_node("/root/Fx")
	var host := Node3D.new()
	root.add_child(host)
	current_scene = host

	for id: StringName in [&"blood_burst", &"slam_dust", &"spark", &"hit_flash",
			&"bull_slam", &"bull_kick", &"bull_dash"]:
		var inst: Node = fx.call("spawn", id, Transform3D.IDENTITY, host)
		_ok(inst != null and is_instance_valid(inst), "spawns %s" % id)

	# Continuous bull effects are held (attach), not fired-and-forgotten (spawn).
	for id: StringName in [&"bull_hoof_dust", &"bull_charge_trail", &"bull_roll_sparks"]:
		var inst: Node = fx.call("attach", id, host)
		_ok(inst != null and is_instance_valid(inst), "attaches %s" % id)

	var missing: Node = fx.call("spawn", &"does_not_exist", Transform3D.IDENTITY, host)
	_ok(missing == null, "unknown effect returns null instead of crashing")

	# The preview gallery scene is wired (has its controller script + label).
	var gallery: Node = load("res://systems/fx/effect_gallery.tscn").instantiate()
	_ok(gallery.get_script() != null, "gallery scene keeps its controller script")
	host.add_child(gallery)
	await process_frame
	_ok(gallery.get_node_or_null("UI/Label") != null, "gallery scene has its name label")

	await process_frame
	print("Results: %d passed, %d failed" % [_pass, _fail])
	quit(1 if _fail > 0 else 0)