using Windows.Storage;
using System.Globalization;
using System.Diagnostics;
using Windows.UI.Xaml;

namespace FoxTube.Services
{
	public class SettingsService
	{
		private static readonly ApplicationDataContainer storage = ApplicationData.Current.RoamingSettings;

		public static void ResetSettings() =>
			storage.Values.Clear();

		public static ElementTheme Theme
		{
			get => (ElementTheme)GetValue(ElementTheme.Default);
			set => SetValue((int)value);
		}

		public static string RelevanceLanguage
		{
			get => GetValue(GetDefaultLanguage());
			set => SetValue(value);
		}

		public static bool AllowAnalytics
		{
			get => GetValue(true);
			set => SetValue(value);
		}

		public static bool AskEveryDownload
		{
			get => GetValue(true);
			set => SetValue(value);
		}

		public static string DefaultDownloadsFolder
		{
			get => GetValue(null);
			set => SetValue(value);
		}

		#region Service methods
		private static string GetDefaultLanguage()
		{
			if (CultureInfo.InstalledUICulture.TwoLetterISOLanguageName.Belongs("ua", "ru", "by", "kz", "kg", "md", "lv", "ee"))	// Languages for Russian-speaking countries
				return "ru-RU";
			else
				return "en-US";
		}

		private static dynamic GetValue(object defaultValue)
		{
			string propName = (new StackTrace()).GetFrame(1).GetMethod().Name.Substring(4);
			return storage.Values[$"Settings.{propName}"] ?? defaultValue;
		}

		private static void SetValue(object value)
		{
			string propName = (new StackTrace()).GetFrame(1).GetMethod().Name.Substring(4);
			storage.Values[$"Settings.{propName}"] = value;
		}
		#endregion
	}
}