extends Node2D

var width: int
var height: int
var tiles: Array = []
var x = 1
var homes
var next_home

func _init():
	var bytes = PakAssetLoader.load_file("user://data/fields.pak/field_practice.fld")
	create_from_buffer(bytes)

# Called when the node enters the scene tree for the first time.
func _ready():
	$BGSprite.texture = PakAssetLoader.load_file("user://data/fields.pak/practice_l.dat")
	homes = tiles.filter(is_home)
	$Unit.position = homes[0].position
	next_home = homes[1].position
	homes = [homes[0], homes[1], homes[3], homes[2]]
	pass

func is_home(tile):
	return tile.id == Enums.TileID.TileHome


# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta):
	var move_speed = delta * 60.0
	if $Unit.position != next_home:
		$Unit.position = $Unit.position.move_toward(next_home, move_speed * 8)
	else:
		x += 1
		next_home = homes[x % 4].position
	pass


func create_from_buffer(bytes: PackedByteArray):
	var num_tiles = bytes.size() / 8

	# all boards are square
	height = int(sqrt(num_tiles))
	width = int(sqrt(num_tiles))
	var j = 0;
	for i in range(0, num_tiles):
		var tile = load("res://Field/tile.tscn").instantiate()
		tile.id = bytes.decode_u32(i * 8)
		# var exit_bits = bytes.decode_u8((i * 8) + 4)
		add_child.call_deferred(tile)
		tile.position = Vector2(((i % width) * 158) + 64, (j * 158) + 64)
		tiles.append(tile)
		if i % height == height - 1:
			j += 1