extends Node2D

class_name Item

var inventory : Control

var dragging = false

var last_position = null

var layer = 0

func _process(delta):
	if not dragging: return
	global_position = get_global_mouse_position()
	
func _input(event):
	if event is InputEventMouseButton:
		if ((event.button_index == MOUSE_BUTTON_LEFT and layer == 0) or (event.button_index == MOUSE_BUTTON_RIGHT and layer == 1)) and not event.pressed :
			dragging = false
			var inventory_position = inventory.global_to_inventory_coords(global_position)
			if inventory_position != null and last_position != Vector2i(inventory_position):
				var temp = inventory.items[layer][inventory_position.y][inventory_position.x]
				inventory.items[layer][inventory_position.y][inventory_position.x] = self
				inventory.items[layer][last_position.y][last_position.x] = temp
				global_position = inventory.inventory_to_global_coords(Vector2i(inventory_position.x,inventory_position.y))
				if last_position != null:
					if temp != null:
						inventory.items[layer][last_position.y][last_position.x].global_position = inventory.inventory_to_global_coords(Vector2i(last_position.x,last_position.y))
						inventory.items[layer][last_position.y][last_position.x].last_position = Vector2i(last_position.x,last_position.y)
				last_position = Vector2i(inventory_position.x,inventory_position.y)
			elif last_position != null and inventory.items[layer][last_position.y][last_position.x] == null:
				inventory.items[layer][last_position.y][last_position.x] = self
				global_position = inventory.inventory_to_global_coords(Vector2i(last_position.x,last_position.y))
			inventory.call_deferred("update_calculations")