extends Control
#warning-ignore-all:return_value_discarded

const globals = preload('res://globals.gd')  # Make LSP shut up about non-const
const Menu = globals.Menu
var packed_menus = {}
var menus = {}
var active_menu_stack = []

func instantiate_menu_list(menu_list) -> void:
	for key in menu_list:
		packed_menus[key] = load(globals.MENUS[key][0])
		menus[key] = packed_menus[key].instance()
		if menus[key].has_signal('exit'):
			menus[key].connect('exit', self, 'pop_menu')

var is_rom_loaded := false
func _on_rom_loaded() -> void:
	instantiate_menu_list(globals.POST_ROM_MENUS)
	menus[Menu.DEBUG].connect('button_pressed', self, 'push_menu')
	is_rom_loaded = true

var is_savefile_loaded := false
func _on_savefile_loaded(dicts) -> void:
	push_menu(Menu.LOAD_SAVE)
	menus[Menu.LOAD_SAVE].set_data(dicts)
	menus[Menu.LOAD_SAVE].connect('slot_activated', self, '_on_saveslot_loaded')

func _on_saveslot_loaded(dict) -> void:
	push_menu(Menu.PARTY)
	menus[Menu.PARTY].update_labels(dict)

func _ready() -> void:
	if OS.get_name() != 'HTML5' or !OS.has_feature('JavaScript'):
		packed_menus[Menu.LOADER] = preload('res://widgets/FileSelect.tscn')
	else:
		packed_menus[Menu.LOADER] = preload('res://widgets/FileSelectWeb.tscn')
	menus[Menu.LOADER] = packed_menus[Menu.LOADER].instance()
	push_menu(Menu.LOADER)

	instantiate_menu_list(globals.INITIAL_MENUS)

	RomLoader.connect('rom_loaded', self, '_on_rom_loaded')
	menus[Menu.LOADER].connect('debug_pressed', self, 'push_debug_menu')
	menus[Menu.LOADER].connect('savefile_loaded', self, '_on_savefile_loaded')
	Common.update_window_scale()

func push_debug_menu():
	push_menu(Menu.DEBUG)

func push_menu(menu_type):
	if len(active_menu_stack) > 0:
		if active_menu_stack[-1] == menu_type:
			return
		remove_child(menus[active_menu_stack[-1]])
	active_menu_stack.append(menu_type)
	add_child(menus[menu_type])

func pop_menu():
	if len(active_menu_stack) > 0:
		remove_child(menus[active_menu_stack.pop_back()])
		if len(active_menu_stack) > 0:
			add_child(menus[active_menu_stack[-1]])
		else:
			push_menu(Menu.LOADER)

func _input(event: InputEvent) -> void:
	if event is InputEventKey and event.pressed:
		match event.scancode:
			KEY_BACKSPACE:
				pop_menu()
			KEY_D:
				if is_rom_loaded:
					push_menu(Menu.DEBUG)

func _notification(what) -> void:
	match what:
		NOTIFICATION_WM_GO_BACK_REQUEST:  # Android back button/gesture
			if len(active_menu_stack) < 2:
				print('main received NOTIFICATION_WM_GO_BACK_REQUEST, quitting')
				get_tree().call_deferred('quit')
			else:
				print('main received NOTIFICATION_WM_GO_BACK_REQUEST, popping menu')
				call_deferred('pop_menu')