using System;
using Gallery.Util;
using Xamarin.Essentials;
using Xamarin.Forms;

namespace Gallery.Resources.UI
{
    public static class Definition
    {
        public const double FontSizeTitle = 18.0;

        public static readonly Thickness ScreenBottomPadding;
        public static readonly Thickness TopOffset32 = new(0, 32, 0, 0);
        public static readonly Color ColorLightShadow = Color.FromRgba(0, 0, 0, 0x20);
        public static readonly Color ColorRedBackground = Color.FromRgb(0xfd, 0x43, 0x63);
        public static readonly Color ColorDownloadBackground = Color.FromRgb(0xd7, 0xd9, 0xe0);
        public static readonly ImageSource DownloadBackground = ImageSource.FromFile("download.png");
        public static readonly double FontSizeSmall = Device.GetNamedSize(NamedSize.Small, typeof(Label));

#if __IOS__
        public const string IconLightFamily = "FontAwesome5Pro-Light";
        public const string IconRegularFamily = "FontAwesome5Pro-Regular";
        public const string IconSolidFamily = "FontAwesome5Pro-Solid";

        public const string IconLeft = "\uf104";
#elif __ANDROID__
        public const string IconLightFamily = "fa-light-300.ttf#FontAwesome5Pro-Light";
        public const string IconRegularFamily = "fa-regular-400.ttf#FontAwesome5Pro-Regular";
        public const string IconSolidFamily = "fa-solid-900.ttf#FontAwesome5Pro-Solid";

        public const string IconLeft = "\uf053";
#endif

        public const string IconOption = "\uf013";
        public const string IconRefresh = "\uf2f9";
        public const string IconLove = "\uf004";
        public const string IconCircleLove = "\uf4c7";
        public const string IconClose = "\uf057";
        public const string IconShare = "\uf1e0";

        static Definition()
        {
            _ = IsFullscreenDevice;
            if (_isBottomPadding)
            {
                if (DeviceInfo.Idiom == DeviceIdiom.Phone)
                {
                    ScreenBottomPadding = new Thickness(0, 0, 0, 26);
                }
                else
                {
                    ScreenBottomPadding = new Thickness(0, 0, 0, 16);
                }
            }
        }

        private static bool _isBottomPadding;
        private static bool? _isFullscreenDevice;
        public static bool IsFullscreenDevice
        {
            get
            {
                if (_isFullscreenDevice != null)
                {
                    return _isFullscreenDevice.Value;
                }
#if __IOS__
                try
                {
                    var model = DeviceInfo.Model;
                    if (model == "iPhone10,3")
                    {
                        // iPhone X
                        _isFullscreenDevice = true;
                        _isBottomPadding = true;
                    }
                    else if (model.StartsWith("iPhone"))
                    {
                        var vs = model[6..].Split(',');
                        if (vs.Length == 2 && int.TryParse(vs[0], out int main) && int.TryParse(vs[1], out int sub))
                        {
                            // iPhone X
                            // iPhone XS/XR/11/12 or newer
                            var flag = (main == 10 && sub == 6) || main > 10;
                            _isFullscreenDevice = flag;
                            _isBottomPadding = flag;
                        }
                        else
                        {
                            _isFullscreenDevice = false;
                        }
                    }
                    else if (model.StartsWith("iPad"))
                    {
                        _isFullscreenDevice = false;
                        var vs = model[4..].Split(',');
                        if (vs.Length == 2 && int.TryParse(vs[0], out int main) && int.TryParse(vs[1], out int sub))
                        {
                            // iPad Pro 11-inch (gen 1~3)
                            // iPad Pro 12.9-inch (gen 3~5)
                            var flag = main == 8 || (main == 13 && sub >= 4 && sub < 12);
                            _isBottomPadding = flag;
                        }
                    }
                    else
                    {
#if DEBUG
                        // simulator
                        var name = DeviceInfo.Name;
                        var flag =
                            name.StartsWith("iPhone X") ||
                            name.StartsWith("iPhone 11") ||
                            name.StartsWith("iPhone 12");
                        _isFullscreenDevice = flag;
                        _isBottomPadding = flag ||
                            name.StartsWith("iPad Pro (11-inch)") ||
                            name.StartsWith("iPad Pro (12.9-inch) (3rd generation)") ||
                            name.StartsWith("iPad Pro (12.9-inch) (4th generation)") ||
                            name.StartsWith("iPad Pro (12.9-inch) (5th generation)");
#else
                        _isFullscreenDevice = false;
#endif
                    }
                }
                catch (Exception ex)
                {
                    Log.Error("device.model.get", $"failed to get the device model. {ex.Message}");
                }
#else
                _isFullscreenDevice = false;
#endif
                return _isFullscreenDevice.Value;
            }
        }
    }
}