class_name EnemyCounterHUD
extends CanvasLayer

@onready var _label: Label = $MarginContainer/Label

var _remaining_enemies: int = 0

func _ready() -> void:
	EventBus.enemy_defeated.connect(_on_enemy_defeated)
	_count_initial_enemies.call_deferred()

func _count_initial_enemies() -> void:
	_remaining_enemies = get_tree().get_nodes_in_group("enemies").size()
	_update_label()

func _on_enemy_defeated() -> void:
	_remaining_enemies = maxi(_remaining_enemies - 1, 0)
	_update_label()

func _update_label() -> void:
	if _remaining_enemies <= 0:
		visible = false
		return
	_label.text = "Enemies remaining: %d" % _remaining_enemies