class_name Task
extends Node

enum {FAILURE = -1, SUCCESS = 1, RUNNING = 0}
var status: int = FAILURE


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

    if status == RUNNING:
        for c in self.get_children():
            if not c.status == RUNNING:
                continue
            c.internal_run(p_blackboard)
            if c.status != SUCCESS:
                status = c.status
                return

    run(p_blackboard)


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