extends Sprite2D

var pos: Vector2i = Vector2i(0,0)
var dir: TileSet.CellNeighbor = TileSet.CELL_NEIGHBOR_TOP_RIGHT_SIDE
@onready var tiles: TileMapLayer = get_node("TileMapLayer")

var next_dir: Dictionary = {
	0: TileSet.CELL_NEIGHBOR_RIGHT_SIDE,
	1: TileSet.CELL_NEIGHBOR_BOTTOM_RIGHT_SIDE,
	2: TileSet.CELL_NEIGHBOR_BOTTOM_LEFT_SIDE,
	3: TileSet.CELL_NEIGHBOR_TOP_LEFT_SIDE,
	4: TileSet.CELL_NEIGHBOR_TOP_RIGHT_SIDE,
}
	
var next_int: Dictionary = {
	TileSet.CELL_NEIGHBOR_RIGHT_SIDE: 1,
	TileSet.CELL_NEIGHBOR_BOTTOM_RIGHT_SIDE: 2,
	TileSet.CELL_NEIGHBOR_BOTTOM_LEFT_SIDE: 3,
	TileSet.CELL_NEIGHBOR_TOP_LEFT_SIDE: 4,
	TileSet.CELL_NEIGHBOR_TOP_RIGHT_SIDE: 0,
}

func _ready() -> void:
	set_frame(1)

func update() -> void:
	var tile: int = tiles.get_tile_colour(pos)
	print("tile %s" % tile)
	var newFrame: int = next_int[dir]
	
	if tile == 0:
		newFrame = (newFrame + 1) % 5
		dir = next_dir[newFrame]
	else:
		newFrame = (newFrame) % 5
		dir = next_dir[newFrame]
		
	#var tmpPos: Vector2i
	#for i in range(0, 16):
		#tmpPos = tiles.get_neighbor_cell(pos, i)
		#print("%s: (%d %d)" % [i, tmpPos.x, tmpPos.y])
		
	print("(%d %d)" % [pos.x, pos.y])
	pos = tiles.get_neighbor_cell(pos, dir)
	tile = tiles.get_tile_colour(pos)
	print("(%d %d)" % [pos.x, pos.y])
	tiles.set_tile(pos, (tile + 1) % 2) # TODO: should probably use another dictionary
	set_frame(newFrame)
	
func _physics_process(delta: float) -> void:
	var vel: Vector2 = Vector2(0,0)
	match dir:
		TileSet.CELL_NEIGHBOR_TOP_RIGHT_SIDE:
			vel = Vector2(1,1)
		TileSet.CELL_NEIGHBOR_RIGHT_SIDE:
			vel = Vector2(1,0)
		_:
			vel = Vector2(0,-1)
	vel = vel.normalized() * 16
	global_position += vel * delta