extends Control

@export
var music: AudioStream

@export
var new_game_scene: PackedScene

var fade_to: PackedScene

func _ready():
	MusicPlayer.stop()
	MusicPlayer.stream = music
	MusicPlayer.volume_db = 0
	MusicPlayer.play()
	$Fader.modulate.a = 1
	$CreditsMenu.hide()

	$"New Game".connect("button_down",Callable(self,"new_game"))
	$Credits.connect("button_down",Callable(self,"show_credits"))
	$Quit.connect("button_down",Callable(self,"on_quit_down"))

	fade_out(3, 1, -1)

func new_game():
	SaveManager.add_run()
	fade_to = new_game_scene
	fade_out(3, -80)

func show_credits():
	$CreditsMenu.show()

func on_quit_down():
	get_tree().quit()


var timePassed = 0 #Current amount of time spend displaying te
const CHECK_LENGTH = 0.05 #Interval to check for updates
var timeNeeded = 0 #Time that it takes to display the text
var fadeTimer #Timer object

var multiplier = 1
var adder = 0
func fade_out(seconds, multi = 1, add = 0):
	multiplier = multi
	adder = add
	timeNeeded = seconds
	timePassed = 0
	if(!fadeTimer):
		fadeTimer = Timer.new()
		add_child(fadeTimer)
		fadeTimer.connect("timeout",Callable(self,"on_fade_timeout"))
	fadeTimer.start(CHECK_LENGTH)

func on_fade_timeout():
	timePassed += CHECK_LENGTH
	MusicPlayer.volume_db = multiplier * (timePassed/timeNeeded)
	$Fader.modulate.a = abs(timePassed/timeNeeded + adder)
	if(timePassed >= timeNeeded):
		fadeTimer.stop()
		if($Fader.modulate.a > 0.5):
			get_tree().change_scene_to_packed(fade_to)
	else:
		fadeTimer.start(CHECK_LENGTH)
	pass