extends HBoxContainer

@export var current_battery : TextureProgressBar
@export var battery_drain : float = 1
@export var starting_batteries : int = 3
var cb_value : float = 16
var extra_batteries : int

# Called when the node enters the scene tree for the first time.
func _ready() -> void:
	extra_batteries = starting_batteries -1 
	redraw_extra_batteries()


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	if cb_value <= 0:
		extra_batteries -= 1
		cb_value = 16
		redraw_extra_batteries()
	var thrust : float = Input.get_action_strength("thrust")
	cb_value -= thrust * delta * battery_drain
	current_battery.value = cb_value

func redraw_extra_batteries():
	for i in range(get_children().size()):
		if(i != 0):
			get_child(i).queue_free()
	
	for i in range(extra_batteries):
		var new_extra = load("res://Prefabs/spare_battery.tscn").instantiate()
		add_child(new_extra)