extends Tile
class_name TileTurn

enum Direction {
	Forward,
	Left,
	Right,
	Both
}

@export var turn_direction: Direction = Direction.Forward

@onready var area_3d: Area3D = $Area3D as Area3D
@onready var path_forward: TilePath = $PathForward as TilePath
@onready var path_right: TilePath = $PathRight as TilePath
@onready var path_left: TilePath = $PathLeft as TilePath

var connected: bool = false
var current_direction: Direction = Direction.Forward
var character: Character

var on_main_path: bool:
	get:
		return path_index == 0


func _process(delta: float) -> void:
	var character_found = false
	for area in area_3d.get_overlapping_areas():
		if area is Character:
			character_found = true
			if connected:
				break
			character = area as Character
			character.turn.connect(turn)
			connected = true
	if not character_found and connected:
		character.turn.disconnect(turn)
		connected = false
	super(delta)


func load_path() -> void:
	paths.append($MainPath)
	paths.append($PathForward)


func turn(direction: Direction) -> void:
	if on_main_path:
		var next_path: TilePath = get_path_by_direction(direction)
		if next_path == null or (direction != turn_direction and direction != Direction.Both):
			return
		current_direction = direction
		paths[path_index+1] = next_path


func get_path_by_direction(direction: Direction) -> TilePath:
	if direction == Direction.Forward and path_forward != null:
		return path_forward
	elif direction == Direction.Right and path_right != null:
		return path_right
	elif direction == Direction.Left and path_left != null:
		return path_left
	return null