Please help me find out what went wrong in my movement code for the nokia classic snake game remake

Question

Please help me. As we know in the snake game, if we are currently moving to the right: we cannot move to the left, we have to move either up or down or persist with moving right. And so on respectively for the other directions. So I came up with the following code:

extends Area2D

export var SPEED=100
var input_vector= Vector2.ZERO
var canMove = {'left':false, 'right':false, 'up':false, 'down':false}
var moving = {'left':false, 'right':false, 'up':false, 'down':false}

func _physics_process(delta):

position += input_vector*SPEED*delta

if Input.is_action_just_pressed("ui_right"):
    input_vector.x=1
    input_vector.y=0
if Input.is_action_just_pressed("ui_left"):
    input_vector.x=-1
    input_vector.y=0
if Input.is_action_just_pressed("ui_up"):
    input_vector.x=0
    input_vector.y=-1
if Input.is_action_just_pressed("ui_down"):
    input_vector.x=0
    input_vector.y=1


if input_vector.x<0:
    moving['left']=true
if input_vector.x>0:
    moving['right']=true

if input_vector.y<0:
    moving['up']=true
if input_vector.y>0:
    moving['down']=true


if moving['left']==true:
    canMove['right']=false
    canMove['up']=true
    canMove['down']=true
if moving['right']==true:
    canMove['left']=false
    canMove['up']=true
    canMove['down']=true
if moving['up']==true:
    canMove['right']=true
    canMove['left']=true
    canMove['down']=false
if moving['down']==true:
    canMove['right']=true
    canMove['left']=true
    canMove['up']=false


if canMove['left']==false:
    input_vector.x= abs(input_vector.x)
if canMove['right']==false:
    input_vector.x= -abs(input_vector.x)

if canMove['up']==false:
    input_vector.y= abs(input_vector.y)
if canMove['down']==false:
    input_vector.y= -abs(input_vector.y)

Answer 1

I don't think this is a good way to achieve snake like mouvement, I remember some part of how I coded this some time ago:

var direction = Vector2.ZERO

func _physics_process(delta):
  if Input.is_action_just_pressed("ui_left") and direction != Vector2.RIGHT:
    direction = Vector2.LEFT
  if Input.is_action_just_pressed("ui_right") and direction != Vector2.LEFT:
    direction = Vector2.RIGHT
  if Input.is_action_just_pressed("ui_up") and direction != Vector2.DOWN:
    direction = Vector2.UP
  if Input.is_action_just_pressed("ui_down") and direction != Vector2.UP:
    direction = Vector2.DOWN

You can then add the code to move the snake according to the variable direction