extends CanvasLayer

signal exited

@onready var master_bus_slider = %HSliderMasterBus as HSlider
@onready var sfx_bus_slider = %HSliderSfxBus as HSlider
@onready var dialog_bus_slider = %HSliderDialogBus as HSlider
@onready var language_options = %OptionButtonLanguage as OptionButton
@onready var autosave_box = %AutoSaveCheckBox as CheckBox
@onready var autosave_time_edit = %SaveTimeLineEdit as LineEdit
@onready var fullscreen_box = %FullscreenBox as CheckBox
@onready var top_box = %TopBox as CheckBox
@onready var index_btn = %IndexBtn as Button
@onready var exit_btn = %ExitBtn as Button
@onready var diary_btn = %DiaryBtn as Button

# 音量 DB 偏移
var sfx_db_offset := 0.0
var dialog_db_offset := 0.0

func _ready():
	layer = GlobalConfig.CANVAS_LAYER_SETTINGS
	visibility_changed.connect(_on_visibility_changed)
	# bus
	master_bus_slider.value = db_to_linear(
		AudioServer.get_bus_volume_db(AudioServer.get_bus_index("Master"))
	)
	sfx_bus_slider.value = db_to_linear(
		AudioServer.get_bus_volume_db(AudioServer.get_bus_index("game_sfx")) - sfx_db_offset
	)
	dialog_bus_slider.value = db_to_linear(
		AudioServer.get_bus_volume_db(AudioServer.get_bus_index("dialog")) - dialog_db_offset
	)
	master_bus_slider.value_changed.connect(_on_master_bus_slider_value_changed)
	sfx_bus_slider.value_changed.connect(_on_sfx_bus_slider_value_changed)
	dialog_bus_slider.value_changed.connect(_on_dialog_bus_slider_value_changed)
	# language
	language_options.selected = GlobalConfigManager.config.language
	_on_language_options_selected(language_options.selected)
	language_options.item_selected.connect(_on_language_options_selected)
	# auto save
	autosave_box.button_pressed = GlobalConfigManager.config.auto_save_enabled
	autosave_time_edit.editable = GlobalConfigManager.config.auto_save_enabled
	autosave_time_edit.text = str(GlobalConfigManager.config.auto_save_seconds)
	autosave_box.toggled.connect(_on_autosave_box_toggled)
	autosave_time_edit.text_submitted.connect(_on_autosave_time_edit_text_submitted)
	autosave_time_edit.focus_exited.connect(_on_autosave_time_edit_text_submitted)
	# window
	fullscreen_box.button_pressed = GlobalConfigManager.config.window_fullscreen
	top_box.button_pressed = GlobalConfigManager.config.window_top
	fullscreen_box.toggled.connect(_on_fullscreen_box_toggled)
	top_box.toggled.connect(_on_top_box_toggled)
	# navigation
	exit_btn.pressed.connect(_on_exit_btn_pressed)
	index_btn.pressed.connect(_on_index_btn_pressed)
	diary_btn.pressed.connect(_on_diary_btn_pressed)


func _on_visibility_changed() -> void:
	if visible:
		$"Sfx打开".play()
		get_tree().paused = true
		SceneManager.lock_player()
	else:
		$"Sfx关闭".play()
		get_tree().paused = false
		SceneManager.unlock_player()


func exit_settings():
	visible = false
	exited.emit()


func _on_master_bus_slider_value_changed(value: float) -> void:
	var db_value = linear_to_db(value)
	GlobalConfigManager.config.db_master = db_value
	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("Master"), db_value)


func _on_sfx_bus_slider_value_changed(value: float) -> void:
	var db_value = linear_to_db(value) + sfx_db_offset
	GlobalConfigManager.config.db_game_sfx = db_value
	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("game_sfx"), db_value)


func _on_dialog_bus_slider_value_changed(value: float) -> void:
	var db_value = linear_to_db(value) + dialog_db_offset
	GlobalConfigManager.config.db_dialog = db_value
	AudioServer.set_bus_volume_db(AudioServer.get_bus_index("dialog"), db_value)

func _on_language_options_selected(id: int) -> void:
	# -1 null; 0 zh_CN; 1 zh_SH; 2 en
	var lang = ""
	match id:
		0:
			lang = "zh_CN"	
		1:
			lang = "zh_SH"
		2:
			lang = "en"
		_:
			lang = "zh_CN"
			printerr("Unknown language id: ", id)
	GlobalConfigManager.config.language = id
	if GlobalConfig.DEBUG:
		print("set language to: ", lang)
	TranslationServer.set_locale(lang)


func _on_autosave_box_toggled(is_pressed: bool) -> void:
	GlobalConfigManager.config.auto_save_enabled = is_pressed
	autosave_time_edit.editable = GlobalConfigManager.config.auto_save_enabled


func _on_autosave_time_edit_text_submitted(_text = null) -> void:
	var seconds = autosave_time_edit.text.to_int()
	# limit the value, at least 10 seconds
	if seconds < 10:
		seconds = 10
	autosave_time_edit.text = str(seconds)
	GlobalConfigManager.config.auto_save_seconds = seconds


func _on_fullscreen_box_toggled(is_pressed: bool) -> void:
	if is_pressed:
		get_window().mode = Window.MODE_FULLSCREEN
	else:
		get_window().mode = Window.MODE_WINDOWED
	GlobalConfigManager.config.window_fullscreen = is_pressed


func _on_top_box_toggled(is_pressed: bool) -> void:
	get_window().always_on_top = is_pressed
	GlobalConfigManager.config.window_top = is_pressed


func _on_exit_btn_pressed() -> void:
	SceneManager.quit_game()


func _on_index_btn_pressed() -> void:
	# 防止游戏卡死
	get_tree().paused = false
	ArchiveManager.save_all()
	SceneManager.checkout_index_page()


func _on_diary_btn_pressed() -> void:
	SceneManager.show_bag()
	exit_settings()


func _unhandled_key_input(event: InputEvent) -> void:
	if not visible:
		return
	# settings 界面接受所有输入事件
	get_viewport().set_input_as_handled()
	if event.is_action_pressed("escape"):
		exit_settings()