extends SceneTree

## Verify LEVEL 0 end to end: the generated maze produces walls, everything smashable is
## invisible on arrival, a discharge coats what's in front of you and NOT what's behind,
## the coating settles again, and breathing it registers.
##
##   Godot --headless --path game --script dev/probe_backrooms.gd

func _initialize() -> void:
	var main: Node = (load("res://main.tscn") as PackedScene).instantiate()
	get_root().add_child(main)
	await process_frame
	main._load_level("backrooms")
	for i in 8:
		await physics_frame

	var plan = main.get("_plan")
	var dust = main.get("_dust")
	var player = main.get("_player")
	print("site          : ", plan.level_name(), " — ", plan.subtitle())
	print("generated walls: ", plan.spec["walls"].size(), "   pillars+trim slabs: ",
		plan.spec["slabs"].size())
	print("smashables    : ", get_nodes_in_group("smashable").size())
	print("dust active   : ", dust.active)
	print("visible now   : ", _visible_count())

	# stand in the middle and spray
	player.global_position = Vector3(0, 0, 0)
	await physics_frame
	dust._cd = 0.0
	dust.discharge()
	await physics_frame
	print("after 1 puff  : visible = ", _visible_count(), "   inhaled = %.2f" % dust.inhaled)

	dust._cd = 0.0
	dust.discharge()
	dust._cd = 0.0
	dust.discharge()
	await physics_frame
	print("after 3 puffs : visible = ", _visible_count(), "   inhaled = %.2f" % dust.inhaled)

	# fast-forward past the coating time
	for e in dust._hidden:
		if is_instance_valid(e):
			e.set_meta("dust_until", 1)
	await process_frame
	await process_frame
	print("after settling: visible = ", _visible_count())
	print("hud           : ", dust.hud_line())

	# leaving must clear it, or the mechanic leaks into every other site
	main._load_level("scranton")
	for i in 6:
		await physics_frame
	print("back at office: dust active = ", dust.active,
		"  visible = ", _visible_count(), " / ", get_nodes_in_group("smashable").size())
	quit()

func _visible_count() -> int:
	var n := 0
	for s in get_nodes_in_group("smashable"):
		for mi in Floorplan.meshes(s):
			if (mi as MeshInstance3D).visible:
				n += 1
				break
	return n