class_name Groove
extends CharacterBody2D


@export var rest_length: float
@export var springiness: float
@export var damping: float
@export var player: Player


func _physics_process(delta: float) -> void:
	var length = global_position.distance_to(player.global_position)
	var tension = length - rest_length
	if tension > 0:
		var force = tension * springiness
		velocity += global_position.direction_to(player.global_position) * force * delta
	velocity -= velocity * damping * delta
	move_and_slide()


func _on_hitbox_body_entered(body: Node2D) -> void:
	if body.has_method(&"knock"):
		body.knock(global_position.direction_to(body.global_position) * velocity.length())