class_name InventoryManager
extends Resource
## Currently doing this in a weird way where the inventory items are the 
## dictionary keys. This would make world inventory items ownable
## by the resourse itself. At least that's what I think. We'll see.
## I'm interested in an approach where the game world items aren't
## duplicated. 


# Declare member variables here. Examples:
# var a = 2
# var b = "text"
var primary_selection: Item
var secondary_selection: Item

# count of items in dictionary value
var _items :Dictionary


# Called when the node enters the scene tree for the first time.
func _ready():
	pass # Replace with function body.
	
func select_primary(_item :Item) -> void:
	if _items.has(_item):
		primary_selection = _item

func select_secondary(_item :Item) -> void:
	if _items.has(_item):
		secondary_selection = _item

func add_to_inventory(_item :Item) -> int:
	if _items.has(_item):
		_items[_item] += 1
	else:
		_items[_item] = 1
	return _items[_item]


func remove_from_inventory (_item :Item) -> int:
	if _items.has(_item):
		_items[_item] -= 1
		if _items[_item] == 0:
			_items.erase(_item)
			return 0
		else: 
			return _items[_item]
	else:
		return 0


func clear_item_from_inventory (_item :Item) -> void:
	if _items.has(_item):
		_items.erase(_item)


# Called every frame. 'delta' is the elapsed time since the previous frame.
#func _process(delta):
#	pass