extends Node


#region Graphics Settings Signals
signal apply_graphics_settings
signal graphics_resolution_changed(resolution: Vector2i)
signal graphics_fullscreen_changed(fullscreen_enabled: bool)
signal graphics_vsync_changed(vsync_enabled: bool)
signal graphics_fov_changed(fov: int)
#endregion

## See documentation to where this path is: https://docs.godotengine.org/en/stable/tutorials/io/data_paths.html#accessing-persistent-user-data-user[br][br]
##		Default Paths:[br]
##		* Windows: %APPDATA%\Godot\app_userdata\[project_name][br]
##		* macOS: ~/Library/Application Support/Godot/app_userdata/[project_name][br]
##		* Linux: ~/.local/share/godot/app_userdata/[project_name][br]
var save_data_path: String = "user://game_data/"
var settings_file_name: String = "game_settings.tres"

var settings_file_path: String = save_data_path + settings_file_name
var settings: GameSettingsResource = GameSettingsResource.new()


func _init() -> void:
	graphics_fov_changed.connect(_on_graphics_fov_changed)
	graphics_fullscreen_changed.connect(_on_graphics_fullscreen_changed)
	graphics_resolution_changed.connect(_on_graphics_resolution_changed)
	graphics_vsync_changed.connect(_on_graphics_vsync_changed)
	apply_graphics_settings.connect(_on_apply_graphics_settings)


#region Graphics Settings
func _on_apply_graphics_settings() -> void:
	if settings.graphics.fullscreen:
		DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_FULLSCREEN)
	else:
		DisplayServer.window_set_mode(DisplayServer.WINDOW_MODE_WINDOWED)

	get_window().size = settings.graphics.resolution

	if settings.graphics.vsync:
		DisplayServer.window_set_vsync_mode(DisplayServer.VSYNC_ENABLED)
	else:
		DisplayServer.window_set_vsync_mode(DisplayServer.VSYNC_DISABLED)

	save_settings()

func _on_graphics_fov_changed(fov: int) -> void:
	settings.graphics.fov = fov

func _on_graphics_fullscreen_changed(fullscreen_enabled: bool) -> void:
	settings.graphics.fullscreen = fullscreen_enabled

func _on_graphics_resolution_changed(resolution: Vector2i) -> void:
	settings.graphics.resolution = resolution

func _on_graphics_vsync_changed(vsync_enabled: bool) -> void:
	settings.graphics.vsync = vsync_enabled
#endregion

#region Saving and Loading Settings
func load_settings(apply_after_load: bool = true) -> void:
	if !FileAccess.file_exists(settings_file_path):
		printerr("Failed to load game settings. File does not exist: ", settings_file_path)
		return

	settings = ResourceLoader.load(settings_file_path)
	if settings == null:
		printerr("Failed to load game settings. Unknown format? ", settings_file_path)
		return

	if apply_after_load:
		apply_graphics_settings.emit()

func save_settings() -> void:
	if !DirAccess.dir_exists_absolute(save_data_path):
		DirAccess.make_dir_absolute(save_data_path)

	var result: int = ResourceSaver.save(settings, settings_file_path)
	if result != OK:
		printerr("Failed to save game settings: ", result)
#endregion