extends SceneTree
## A corrupt transit ID must reject the entire save projection without losing
## real cabin occupants or making the infrastructure collision check fail open.
var checks := 0
var failures := 0


func _initialize() -> void:
	call_deferred("run")


func expect(ok: bool, label: String) -> void:
	checks += 1
	if not ok:
		failures += 1
		push_error(label)


func run() -> void:
	var path := PathService.new()
	var cells: Array[Vector3i] = [Vector3i.ZERO, Vector3i(0, 1, 0)]
	expect(path.rebuild_graph(cells), "build a normal graph")
	expect(path.configure_elevator(&"lift", cells[0], cells[1], {&"cabin_capacity": 2}), "configure a real cabin")
	for actor: StringName in [&"guest:a", &"guest:b"]:
		expect(path.project_actor_position(actor, cells[0], 10), "position cabin passenger")
		expect(path.enqueue_elevator_request(&"lift", {
			&"request_id": StringName("ride." + String(actor)), &"unit_id": actor,
			&"floor_from": 0, &"floor_to": 1, &"enqueued_at": 10,
		})[&"ok"], "queue real passenger")
	expect(path.dequeue_elevator_boarding(&"lift", 0, 11, 2).size() == 2, "board both passengers")
	var valid: Dictionary = path.create_snapshot()
	expect(valid[&"transit_actor_ids"].size() == 2, "normal save keeps both cabin occupants")
	for bad_id: Variant in [123, true, 1.25, Vector3i(3, 2, 1), null]:
		path._transit_actor_ids[bad_id] = true
		var before := var_to_bytes(path._transit_actor_ids)
		var saved: Dictionary = path.create_snapshot()
		expect(saved.is_empty(), "unsupported transit ID rejects the whole projection")
		expect(var_to_bytes(path._transit_actor_ids) == before, "refusal preserves all transit IDs")
		expect(FacilityInfrastructureProjector._has_managed_namespace_collision(SpatialSubslotService.new(), path, {}), "consumer refuses rejected snapshot")
		saved[&"caller"] = true
		expect(path.create_snapshot().is_empty(), "repeat refusal returns a new empty projection")
		path._transit_actor_ids.erase(bad_id)
		expect(var_to_bytes(path.create_snapshot()) == var_to_bytes(valid), "correction recovers both original occupants")
	var restored := PathService.new()
	expect(restored.restore_snapshot(valid) and restored.rebuild_graph(cells), "save restores real passenger references")
	expect(var_to_bytes(restored.create_snapshot()) == var_to_bytes(valid), "restored full save matches original")
	print("Path snapshot transit guard: %d checks, %d failures" % [checks, failures])
	quit(1 if failures else 0)