class_name Task
extends Node

enum {FAILURE = -1, SUCCESS = 1, RUNNING = 0}
var status: int = FAILURE
var tilemap_types: TileMapTileTypes = TileMapTileTypes.new()


func _ready() -> void:
	for c in get_children():
		if not c is Task:
			push_error("Child is not a task: " + c.name + " in " + name)
			return


func internal_run(p_blackboard: Dictionary) -> void:
	p_blackboard["current_task"] = self

	if status == RUNNING:
		var running_child: Task = find_running_child()
		if running_child != null:
			running_child.internal_run(p_blackboard)
			status = running_child.status
			return
		else:
			run(p_blackboard)
	else:
		run(p_blackboard)
	


func find_running_child() -> Task:
	for c in get_children():
		if c.status == RUNNING:
			return c
	return null


func run_child(p_blackboard: Dictionary, p_child: Task) -> void:
	p_child.internal_run(p_blackboard)
	if p_child.status != RUNNING:
		status = RUNNING


func run(p_blackboard: Dictionary) -> void:
	pass


func cancel(p_blackboard: Dictionary):
	pass


func get_first_child() -> Task:
	if get_child_count() == 0:
		push_error("Task does not have any children: " + name)
		return null
	return get_children()[0] as Task