extends CanvasLayer
## Global UI: pause, inventory, shop, settings, toast, dialog, burger-cham.

@onready var pause_panel: PanelContainer = $PausePanel
@onready var dialog_panel: PanelContainer = $DialogPanel
@onready var dialog_label: Label = $DialogPanel/Margin/DialogLabel
@onready var toast_label: Label = $ToastLabel
@onready var burger_overlay: ColorRect = $BurgerOverlay
@onready var burger_label: Label = $BurgerOverlay/BurgerLabel
@onready var points_label: Label = $PausePanel/Margin/VBox/PointsLabel
@onready var inventory_list: ItemList = $PausePanel/Margin/VBox/InventoryList
@onready var sfx_slider: HSlider = $PausePanel/Margin/VBox/SfxSlider
@onready var music_slider: HSlider = $PausePanel/Margin/VBox/MusicSlider
@onready var lang_option: OptionButton = $PausePanel/Margin/VBox/LangOption
@onready var hp_label: Label = $HUD/HpLabel

var _dialog_timer: float = 0.0

func _ready() -> void:
	process_mode = Node.PROCESS_MODE_ALWAYS
	layer = 100
	pause_panel.visible = false
	dialog_panel.visible = false
	burger_overlay.visible = false
	toast_label.visible = false
	_setup_lang_option()
	_refresh_texts()
	sfx_slider.value = Settings.sfx_volume
	music_slider.value = 1.0
	music_slider.editable = false
	Achievements.unlocked.connect(_on_achievement)
	AudioDirector.burger_cham_triggered.connect(_on_burger_cham)
	Settings.settings_changed.connect(_refresh_texts)
	Locale.locale_changed.connect(_refresh_texts)
	Inventory.inventory_changed.connect(_refresh_inventory)
	Shop.points_changed.connect(_refresh_points)
	GameState.hp_changed.connect(_on_hp)
	_on_hp(GameState.hp, GameState.max_hp)
	_refresh_inventory()
	_refresh_points(Shop.dressler_points)

func _process(delta: float) -> void:
	if _dialog_timer > 0.0:
		_dialog_timer -= delta
		if _dialog_timer <= 0.0:
			dialog_panel.visible = false

func _unhandled_input(event: InputEvent) -> void:
	if event.is_action_pressed("pause_menu"):
		toggle_pause()
		get_viewport().set_input_as_handled()

func toggle_pause() -> void:
	if GameState.current_scene_id in ["title_screen", "death_screen", "intro_cutscene"]:
		return
	pause_panel.visible = not pause_panel.visible
	get_tree().paused = pause_panel.visible
	if pause_panel.visible:
		_refresh_texts()
		_refresh_inventory()

func show_dialog(text: String, duration: float = 3.5) -> void:
	dialog_label.text = text
	dialog_panel.visible = true
	_dialog_timer = duration

func _setup_lang_option() -> void:
	lang_option.clear()
	lang_option.add_item("Deutsch", 0)
	lang_option.add_item("English", 1)
	lang_option.add_item("Bayerisch", 2)
	match Settings.language:
		"en":
			lang_option.select(1)
		"by":
			lang_option.select(2)
		_:
			lang_option.select(0)

func _refresh_texts() -> void:
	$PausePanel/Margin/VBox/TitleLabel.text = Locale.tr_key("menu_settings")
	$PausePanel/Margin/VBox/ResumeButton.text = Locale.tr_key("menu_resume")
	$PausePanel/Margin/VBox/ShopTitle.text = Locale.tr_key("menu_shop")
	$PausePanel/Margin/VBox/BuyPointButton.text = Locale.tr_key("menu_buy_point")
	$PausePanel/Margin/VBox/BuySunglassesButton.text = Locale.tr_key("shop_sunglasses")
	$PausePanel/Margin/VBox/BuyTicketButton.text = Locale.tr_key("shop_ticket")
	$PausePanel/Margin/VBox/BuyMilkButton.text = Locale.tr_key("shop_milk")
	$PausePanel/Margin/VBox/BuyTiramisuButton.text = Locale.tr_key("shop_tiramisu")
	$PausePanel/Margin/VBox/SfxLabel.text = Locale.tr_key("menu_sfx")
	$PausePanel/Margin/VBox/MusicLabel.text = Locale.tr_key("menu_music")
	$PausePanel/Margin/VBox/LangLabel.text = Locale.tr_key("menu_language")
	$PausePanel/Margin/VBox/InventoryLabel.text = Locale.tr_key("menu_inventory")
	_refresh_points(Shop.dressler_points)

func _refresh_points(points: int) -> void:
	points_label.text = Locale.tr_key("menu_points", [str(points)])

func _refresh_inventory() -> void:
	inventory_list.clear()
	var items := Inventory.get_all()
	for id in items.keys():
		var count: int = int(items[id])
		var item_name: String = Locale.tr_key("item_" + str(id))
		inventory_list.add_item("%s x%d" % [item_name, count])
		inventory_list.set_item_metadata(inventory_list.item_count - 1, id)

func _on_hp(hp: int, max_hp: int) -> void:
	hp_label.text = "HP %d/%d" % [hp, max_hp]

func _on_achievement(_id: String, title: String) -> void:
	toast_label.text = Locale.tr_key("toast_achievement", [title])
	toast_label.visible = true
	await get_tree().create_timer(3.0).timeout
	toast_label.visible = false

func _on_burger_cham() -> void:
	burger_label.text = Locale.tr_key("burger_cham")
	burger_overlay.visible = true
	await get_tree().create_timer(2.5).timeout
	burger_overlay.visible = false

func _on_resume_pressed() -> void:
	pause_panel.visible = false
	get_tree().paused = false

func _on_buy_point() -> void:
	Shop.purchase("buy_point")

func _on_buy_sunglasses() -> void:
	Shop.purchase("sunglasses")

func _on_buy_ticket() -> void:
	Shop.purchase("death_ticket")

func _on_buy_milk() -> void:
	Shop.purchase("milk")

func _on_buy_tiramisu() -> void:
	Shop.purchase("tiramisu")

func _on_sfx_changed(value: float) -> void:
	Settings.set_sfx_volume(value)

func _on_music_changed(_value: float) -> void:
	Settings.set_music_volume(1.0)
	music_slider.value = 1.0

func _on_lang_selected(index: int) -> void:
	match index:
		1:
			Settings.set_language("en")
		2:
			Settings.set_language("by")
		_:
			Settings.set_language("de")

func _on_inventory_activated(index: int) -> void:
	var id: Variant = inventory_list.get_item_metadata(index)
	if typeof(id) == TYPE_STRING:
		Inventory.use_item(str(id))
		_refresh_inventory()