class_name BehaviorTree
extends Node

var game_manager: GameManager = null
#
var blackboard: Dictionary = {}
var behavior_tree: Task    = null


func _ready() -> void:
	if get_child_count() == 0 or get_child_count() > 1:
		push_error("This controller needs exactly one Task child, got " + str(get_child_count()))

	var child: Node = get_child(0)
	if not (child is Task):
		push_error("Child is not a task: " + child.name)

	behavior_tree = child as Task


func populate_blackboard():
	blackboard["world"] = game_manager.world
	blackboard["player"] = game_manager.player
	blackboard["camera"] = game_manager.camera


func game_tick() -> void:
	print("game_tick:")
	populate_blackboard()
	behavior_tree.internal_run(blackboard)
	print(" ==> [active state=", blackboard["current_task"], "] [status=", behavior_tree.status, "]")