@tool
extends Area3D


@export var path: Path3D:
	set = set_path
@export var speed: float = 5.0

var follow: PathFollow3D
var marker: Marker3D
var total_distance: float = 0.0

func _ready() -> void:
	if path == null or path is not Path3D:
		printerr("path is not set to a Path3D")
		return
	follow = path.get_node("Follow")
	marker = follow.get_node("Marker")


func _process(delta):
	if path == null:
		return
	global_position = marker.global_position
	if follow.progress_ratio >= 1:
		return
	var travel = speed * delta
	follow.progress += travel
	total_distance += travel
	#if is_equal_approx(follow.progress, change_distance):
		#path = $Path3D2
		#follow = path.get_node(("Follow"))
		#change_distance = path.curve.get_baked_length()
		#marker.reparent(follow)


func set_path(new_path: Path3D):
	if new_path is not Path3D:
		printerr("path must be a Path3D")
		return
	path = new_path
	follow = path.get_node("Follow")
	marker = follow.get_node("Marker")
	update_configuration_warnings()


func _get_configuration_warnings() -> PackedStringArray:
	var warnings = []
	if path == null or path is not Path3D:
		warnings.append("path must be set to a Path3D.")
	return warnings