class_name PlayerStateMachine extends Node

var states: Array[State]
var previous_state: State
var current_state: State

func _ready() -> void:
	process_mode = Node.PROCESS_MODE_DISABLED

func _process(delta: float) -> void:
	change_state(current_state.process(delta))

func _physics_process(delta: float) -> void:
	change_state(current_state.process(delta))

func _unhandled_input(event) -> void:
	change_state(current_state.handle_input(event))

func initialize(player: Player) -> void:
	states = []
	for child in get_children():
		if child is State:
			states.append(child)
	if states.is_empty():
		return

	var firstState = states[0]
	firstState.player = player
	firstState.state_machine = self

	for state in states:
		state.init()

	change_state(firstState)
	process_mode = Node.PROCESS_MODE_INHERIT

func change_state(new_state: State) -> void:
	if new_state == null or new_state == current_state:
		return

	if current_state:
		current_state.exit()
	
	previous_state = current_state
	current_state = new_state
	current_state.enter()