extends Control

const max_vol = 30
const min_vol = -30

onready var MasterValue = $Control/VBoxContainer/GridContainer/VolumeMasterContainer/VolumeMasterValue
onready var MasterSlider = $Control/VBoxContainer/GridContainer/VolumeMasterContainer/VolumeMasterSlider
onready var MusicValue = $Control/VBoxContainer/GridContainer/VolumeMusicContainer/VolumeMusicValue
onready var MusicSlider = $Control/VBoxContainer/GridContainer/VolumeMusicContainer/VolumeMusicSlider
onready var SFXValue = $Control/VBoxContainer/GridContainer/VolumeSFXContainer/VolumeSFXValue
onready var SFXSlider = $Control/VBoxContainer/GridContainer/VolumeSFXContainer/VolumeSFXSlider

func _ready():
	# When scene is instanced, load the settings from singleton
	update_menu(global_variables.volume_master, MasterValue, MasterSlider)
	update_menu(global_variables.volume_music, MusicValue, MusicSlider)
	update_menu(global_variables.volume_sfx, SFXValue, SFXSlider)
	$Control/VBoxContainer/GridContainer/FullscreenCheckButton.set_pressed_no_signal(OS.window_fullscreen)

func _input(event):
	if event.is_action_pressed("escape"):
		queue_free()

func _on_ReturnButton_pressed():
	queue_free()

func _on_VolumeMasterSlider_value_changed(value):
	update_audio(value, 0, MasterSlider, "volume_master_enabled", "volume_master", MasterValue)

func _on_VolumeMusicSlider_value_changed(value):
	update_audio(value, 1, MusicSlider, "volume_music_enabled", "volume_music", MusicValue)

func _on_VolumeSFXSlider_value_changed(value):
	update_audio(value, 2, SFXSlider, "volume_sfx_enabled", "volume_sfx", SFXValue)

func _on_FullscreenCheckButton_toggled(_button_pressed):
	OS.window_fullscreen = !OS.window_fullscreen

func update_audio(value, bus, slider, enabled_var, volume_var, valuelabel):
	# Converts percentage into a range value
	var new_volume = ((value/100) * (max_vol - min_vol)) + min_vol
	global_variables.set(volume_var, new_volume)
	valuelabel.text = str(value) + "%"
	AudioServer.set_bus_volume_db(bus, new_volume)
	if value == slider.min_value:
		AudioServer.set_bus_mute(bus, true)
		global_variables.set(enabled_var, false)
	else:
		AudioServer.set_bus_mute(bus, false)
		global_variables.set(enabled_var, false)

func update_menu(value, valuelabel, slider):
	# Converts stored range values back into a percentage value
	var percentage = ((float(value) - min_vol) / (max_vol - min_vol) ) * 100
	valuelabel.text = str(percentage) + "%"
	slider.value = percentage