class_name StateMachine extends Node

@export var initialState: ChessGameState = null

@onready var state: ChessGameState = (func getInitialState() -> State: 
    return initialState if initialState != null else get_child(0)    
).call()

@onready var parent = get_parent()
var previouseState = null
var disabled = true
@onready var stateString: RichTextLabel = owner.get_node("StateLabel")


func _ready() -> void:
    print("Ready Statemachine")

func start() -> void:
    disabled = false
    for stateNode: ChessGameState in find_children("*", "ChessGameState"):
        stateNode.game = owner
        stateNode.finished.connect(transitionToNextState)

    await owner.ready
    state.enter("")
func enter() -> void:
    disabled = false
    state.enter("")
func enable() -> void:
    disabled = false
func disable() -> void:
    disabled = true

func unhandledInput(event: InputEvent) -> void:
    # print("StateMachine received input:", event)
    state.handleInput(event)


func process(delta: float) -> void: state.update(delta)



func transitionToNextState(targetStatePath: String, data: Dictionary = {}) -> void:
    if disabled:
        previouseState = state.name
        state.exit()
        state = get_node(Constants.ROUND_END)
        stateString.text = Constants.ROUND_END;
        state.enter(previouseState, data)
        print("DISABLED TRANSITION TO: ", targetStatePath, "Going to", Constants.ROUND_END)
        return
    print("TRANSITIONING TO: ", targetStatePath)
    if not has_node(targetStatePath):
        printerr(owner.name + ": Trying to transition to state " + targetStatePath + " but it does not exist.")
        return
    previouseState = state.name
    state.exit()
    state = get_node(targetStatePath)
    stateString.text = targetStatePath;
    state.enter(previouseState, data)