class_name InventorySlot
extends Node

var item : Item
var quantity : int
@onready var icon : TextureRect = get_node("Icon")
@onready var quantity_text : Label = get_node("QuanityText")
var inventory : Inventory

func set_item (new_item : Item):
	item = new_item
	quantity = 1
	
	if item == null:
		icon.visible = false
	else:
		icon.visible = true
		icon.texture = item.icon
	
	update_quantity_text()

func add_item ():
	quantity += 1
	update_quantity_text()

func remove_item ():
	quantity -= 1
	update_quantity_text()
	
	if quantity == 0:
		set_item(null)

func update_quantity_text():
	if quantity <= 1:
		quantity_text.text = ""
	else:
		quantity_text.text = str(quantity)

func _on_mouse_entered() -> void:
	if item == null:
		inventory.info_text.text = ""
	else:
		inventory.info_text.text = item.display_name

func _on_mouse_exited() -> void:
	inventory.info_text.text = ""

func _on_pressed():
	if item == null:
		return
	
	var remove_after_use = item._on_use(inventory.get_parent())
	
	if remove_after_use:
		remove_item()

func drop_item():
	if item == null:
		return
	
	var world_item = item.world_item_scene.instantiate()
	add_child(world_item)
	world_item.position = inventory.get_parent().position + Vector3(0, 1.5, 0) - inventory.get_parent().basis.z
	remove_item()
	

func _on_gui_input(event: InputEvent) -> void:
	if event is InputEventMouseButton and event.pressed:
		if event.button_index == MOUSE_BUTTON_RIGHT:
			drop_item()