extends Area2D

var direction = Vector2()

const DEG_UP = 0
const DEG_RIGHT = 90
const DEG_DOWN = 180
const DEG_LEFT = 270

const DEG_LIST = [DEG_UP, DEG_RIGHT, DEG_DOWN, DEG_LEFT]

const DIR_UP = 0
const DIR_RIGHT = 1
const DIR_DOWN = 2
const DIR_LEFT = 3

var posix
var posiy

var dirx = 0
var diry = 0

var dire = DIR_UP

var grid

var blocks = []
var is_blocked:bool = false
export (NodePath) var rayU
export (NodePath) var rayD
export (NodePath) var rayL
export (NodePath) var rayR
var raycast

func _ready():
	grid = get_parent()
	
	posix = int (position.x / 64)
	posiy = int (position.y / 64)
	
	turn(DIR_UP)
	pass

func _physics_process(delta):
		
	if Input.is_action_pressed("ui_left"):
		dire -= 1
		if dire < 0:
			dire = 3
		update_avatar_dir()

	elif Input.is_action_pressed("ui_right"):
		dire += 1
		if dire > 3:
			dire = 0
		update_avatar_dir()

	if Input.is_action_pressed("ui_up"):
		
		turn(dire)
		
		if !raycast.is_colliding():
			posix += dirx
			posiy += diry
			position = Vector2(posix * 64 + 32, posiy * 64 + 32)
	pass

func _on_area_entered(a):
	if a.get_parent() != $Position2D:
		print(a)
		blocks.append(a)
		is_blocked = true
	pass

func _on_area_exited(a):
	blocks.erase(a)
	is_blocked = blocks.size()
	pass
	
func turn(dir:int):
	dirx = 0
	diry = 0
	if dir == DIR_UP:
		raycast=get_node(rayU)
		diry -= 1
	elif dir == DIR_RIGHT:
		raycast=get_node(rayR)
		dirx += 1
	elif dir == DIR_DOWN:
		raycast=get_node(rayD)
		diry += 1
	else:
		raycast=get_node(rayL)
		dirx -= 1
	pass

func update_avatar_dir():
	$Sprite.rotation_degrees = DEG_LIST[dire]