extends TabContainer

var focus_list: Array

func _ready() -> void:
	for child in get_children():
		focus_list.append(_find_selectable_in(child))

func _find_selectable_in(parent:Control) -> Control:
	if parent.focus_mode != FOCUS_NONE: 
		return parent
	for child in parent.get_children():
		var ret := _find_selectable_in(child)
		if not ret == self:
			return ret			
	return self
	
func _unhandled_input(event : InputEvent) -> void:	
	if event.is_action_type(): print_debug("Unhandled Input", event)
	if event.is_action_type():
		if event.is_action_pressed("ui_left"): previous()
		elif event.is_action_pressed("ui_right"): next()

func next() -> void:
	if current_tab < get_tab_count()-1:
		if !Input.is_action_just_released("mouse_left"):
			if not get_viewport().gui_get_focus_owner() == null:
				focus_list[current_tab] = get_viewport().gui_get_focus_owner()
			current_tab += 1
			focus_list[current_tab].grab_focus()
		else:
			current_tab += 1
	
func previous() -> void:
	if current_tab > 0:
		if !Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT):
			if not get_viewport().gui_get_focus_owner() == null:
				focus_list[current_tab] = get_viewport().gui_get_focus_owner()
			current_tab -= 1
			focus_list[current_tab].grab_focus()
		else:
			current_tab -= 1

func notification(what: int, _reversed: bool = false) -> void:
	if what == NOTIFICATION_VISIBILITY_CHANGED:
		self.set_process_input(visible)