extends SceneTree
## Guard for the web/mobile rigid-skin conversion (rigid_skin.gd). The bug it protects against:
## the converter used to key geometry by destination bone only, so every surface funnelled to a
## bone collapsed onto one material — matadors came out bald with the wrong uniform colour on the
## web build. It now keys per (bone, surface), so all source materials survive. This asserts the
## matador keeps every distinct material after conversion, produces bone-attached pieces, and
## hides the original skinned meshes (so they never hit the invisible-on-Mali skinning path).
## Run: godot --headless --script res://tests/rigid_skin_test.gd

const RigidSkin = preload("res://rigid_skin.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 _surface_mats(mi: MeshInstance3D) -> Array:
	var out: Array = []
	var mesh := mi.mesh
	if mesh == null:
		return out
	for s: int in mesh.get_surface_count():
		var mat: Material = mi.material_override
		if mat == null:
			mat = mi.get_surface_override_material(s)
		if mat == null:
			mat = mesh.surface_get_material(s)
		if mat != null and not out.has(mat):
			out.append(mat)
	return out


func _run() -> void:
	var inst: Node = (load("res://Assets/Matador.glb") as PackedScene).instantiate()
	root.add_child(inst)

	# Distinct materials on the skinned source meshes, before conversion.
	var source: Array = []
	var skinned: Array = []
	for mi: MeshInstance3D in inst.find_children("*", "MeshInstance3D", true, false):
		if mi.skin != null:
			skinned.append(mi)
			for mat: Material in _surface_mats(mi):
				if not source.has(mat):
					source.append(mat)
	_ok(source.size() >= 2, "matador source has multiple distinct materials (%d)" % source.size())

	var converted := RigidSkin.convert_tree(inst)
	_ok(converted > 0, "convert_tree rebuilt %d skinned mesh(es)" % converted)

	# Distinct materials on the generated bone-attached pieces.
	var pieces := 0
	var piece_mats: Array = []
	for att: BoneAttachment3D in inst.find_children("*", "BoneAttachment3D", true, false):
		for mi: MeshInstance3D in att.find_children("*", "MeshInstance3D", true, false):
			pieces += 1
			var mesh := mi.mesh
			if mesh == null:
				continue
			# Pieces are multi-surface now (a bone's materials each stay their own surface), so
			# scan every surface — not just surface 0 — to confirm none were dropped.
			for s: int in mesh.get_surface_count():
				var mat := mesh.surface_get_material(s)
				if mat != null and not piece_mats.has(mat):
					piece_mats.append(mat)
	_ok(pieces > 0, "conversion produced bone-attached pieces (%d)" % pieces)
	_ok(piece_mats.size() >= source.size(),
		"every source material survives conversion (%d of %d kept)" % [piece_mats.size(), source.size()])

	var all_hidden := true
	for mi: MeshInstance3D in skinned:
		if mi.visible:
			all_hidden = false
	_ok(all_hidden, "original skinned meshes are hidden (never drawn on the failing path)")

	_finish()


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