using Xamarin.Forms;
using Gallery.Services;
using Xamarin.Essentials;
using Gallery.Resources;
using Gallery.Util;
using Gallery.Resources.Theme;

namespace Gallery
{
    public partial class App : Application
    {
        public static AppTheme CurrentTheme { get; private set; }
        public static PlatformCulture CurrentCulture { get; private set; }

        public App()
        {
            DependencyService.Register<MockDataStore>();
        }

        private void InitResource()
        {
            var theme = AppInfo.RequestedTheme;
            SetTheme(theme, true);
        }

        private void InitPreference()
        {

        }

        private void InitLanguage()
        {
            var ci = Environment.GetCurrentCultureInfo();
            Environment.SetCultureInfo(ci);
            CurrentCulture = new PlatformCulture(ci.Name.ToLower());
        }

        private void SetTheme(AppTheme theme, bool force = false)
        {
            if (force || theme != CurrentTheme)
            {
                CurrentTheme = theme;
            }
            else
            {
                return;
            }
#if DEBUG
            Log.Print($"application theme: {theme}");
#endif
            Theme themeInstance = theme switch
            {
                AppTheme.Dark => DarkTheme.Instance,
                _ => LightTheme.Instance
            };
#if __IOS__
            var style = (StatusBarStyles)themeInstance[Theme.StatusBarStyle];
            Environment.SetStatusBarStyle(style);
#elif __ANDROID__
            var color = (Color)themeInstance[Theme.NavigationColor];
            Environment.SetStatusBarColor(color);
#endif
            Resources = themeInstance;
        }

        protected override void OnStart()
        {
            InitLanguage();
            MainPage = new AppShell();

            InitResource();
            InitPreference();
        }

        protected override void OnSleep()
        {
        }

        protected override void OnResume()
        {
            var theme = AppInfo.RequestedTheme;
            SetTheme(theme);
        }
    }
}