extends Area3D
class_name PushBox

@export var pushbox_curve : Curve

@onready var character = (get_owner() as Character)
@onready var radius = $CollisionShape3D.shape.radius * scale.x

var pushbox_list = []

func _process(delta):
	var speed_dir = character.get_status("speed_dir") as Vector2
	if speed_dir.length() == 0:
		return
	var speed_down_push_rate = 0
	var pos = character.pos2D()
	for pushbox:PushBox in pushbox_list:
		var target_pos = pushbox.character.pos2D()
		var dir = target_pos - pos
		if speed_dir.dot(dir) <= 0:
			continue
		var dist = dir.length()
		if dist == 0:
			continue
		var dist_rate = clamp(dist/(radius+pushbox.radius),0,1)
		speed_down_push_rate = max(speed_down_push_rate,pushbox_curve.sample(dist_rate))
	character.set_status("speed_down_push_rate",speed_down_push_rate)

func on_area_entered(area:Area3D):
	if area is PushBox:
		pushbox_list.append(area)

func on_area_exited(area:Area3D):
	if area is PushBox:
		pushbox_list.erase(area)