extends SettingOptionButton

@export
var default_value : float = GuiScale.error_guiscale

func _find_guiscale_index_by_value(value : float) -> int:
	for item_index in item_count:
		if get_item_metadata(item_index) == value:
			return item_index
	return -1

func _sync_guiscales(to_select:float=GuiScale.get_current_guiscale()) -> void:
	clear()
	default_selected = -1
	selected = -1
	for guiscale_value in GuiScale.get_guiscale_value_list():
		add_item(GuiScale.get_guiscale_display_name(guiscale_value))
		set_item_metadata(item_count - 1, guiscale_value)

		if guiscale_value == default_value:
			default_selected = item_count - 1

		if guiscale_value == to_select:
			selected = item_count - 1

	if default_selected == -1:
		default_selected = item_count - 1

	if selected == -1:
		selected = default_selected
	
func _setup_button():
	print("Setup Gui scales Button")
	if default_value <= 0:
		#TODO: verify this project setting is what we actually want
		#print("get default from project settings, default was %f",default_value)
		default_value = ProjectSettings.get_setting("display/window/stretch/scale")
	GuiScale.add_guiscale(default_value,&"default")
	_sync_guiscales()

func _get_value_for_file(select_value : int):
	if _valid_index(select_value):
		return get_item_metadata(select_value)
	else:
		return null

func _set_value_from_file(load_value):
	#no need to match types like resolution does since we don't 
	#intend on supporting strings
	var target_guiscale = load_value
	selected = _find_guiscale_index_by_value(target_guiscale)
	if selected != -1:return
	if GuiScale.add_guiscale(target_guiscale):
		_sync_guiscales(target_guiscale)
		return
	push_error("Setting value '%s' invalid for setting [%s] %s" % [load_value, section_name, setting_name])
	selected = default_selected

func _on_item_selected(index:int):
	if _valid_index(index):
		print("Change GUI scale on selector index: %d" % index)
		GuiScale.set_guiscale(get_item_metadata(index))
	else:
		push_error("Invalid GuiScaleSelector index: %d" % index)
		reset_setting()