extends Node


class_name StateMachine

@export var current_state: State
var states: Dictionary[StringName,State] = {}

func _ready() -> void:
	for child in get_children():
		if child is State:
			states[child.name] = child
			child.transition.connect(on_transition_required)
		else:
			push_warning("Child of state machine is not state")

func on_transition_required(to: StringName):
	if states.has(to) == false:
		push_warning("Incorrect state request: " + to)
		return
	
	current_state.exit()
	current_state = states[to]
	current_state.enter()

func _process(delta: float) -> void:
	if current_state == null:
		push_error("State is not set")
		return
	current_state.update(delta)

func _physics_process(delta: float) -> void:
	if current_state == null:
		push_error("State is not set")
		return
	current_state.physics_update(delta)