extends HBoxContainer
class_name InventoryGui

@export var inventory_item_scene: PackedScene

var inventory_item_objects: Array[InventoryGuiItem]

func update(inventory: Inventory):
	if len(inventory_item_objects) == 0 or len(inventory_item_objects) != inventory.items.size():
		for o in inventory_item_objects:
			o.queue_free()
		inventory_item_objects = generate_inventory_item_objects(inventory, inventory.items.size())

	for i in range(inventory.items.size()):
		inventory_item_objects[i].update(inventory.get_item(i), i == inventory.current_item_ind)

func generate_inventory_item_objects(inventory: Inventory, nb: int = 1) -> Array[InventoryGuiItem]:
	var objects: Array[InventoryGuiItem] = []
	for i in range(nb):
		var o = inventory_item_scene.instantiate() as InventoryGuiItem
		add_child(o)
		objects.append(o)
		o.item_clicked.connect(func(): change_current_item_ind(inventory, i))
	return objects

func change_current_item_ind(inventory: Inventory, new_ind: int):
	inventory.set_current_item(new_ind)