using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Effects;

namespace Utils
{
    internal class LoaderManager
    {
        public static LoaderManager Instance { get; set; }

        private Window Window { get; set; }

        private static TextBlock _textBlock;

        private static string _text;

        public static void Init(Window window, string text = "Идет загрузка данных. Пожалуйста, подождите ... ")
        {
            _text = text;

            Instance = new LoaderManager { Window = window };

            if (Instance.Window.Content is UIElement)
                InternalInit(Instance.Window.Content as UIElement);
        }
        private static void InternalInit(UIElement elem)
        {
            elem.Effect = new BlurEffect { Radius = 0 };

            Instance.Window.Content = null;

            var grid = new Grid();
            grid.Children.Add(elem);

            var border = new Border
            {
                Width = 300,
                Height = 30,
                BorderBrush = new SolidColorBrush(Colors.Gray),
                BorderThickness = new Thickness(0.5),
                Background = new SolidColorBrush(Colors.Azure),
                Visibility = Visibility.Collapsed
            };
            _textBlock = new TextBlock
            {
                Text = _text,
                HorizontalAlignment = HorizontalAlignment.Center,
                VerticalAlignment = VerticalAlignment.Center,
                Foreground = new SolidColorBrush(Colors.Black),
            };

            border.Child = _textBlock;
         
            grid.Children.Add(border);

            Instance.Window.Content = grid;
        }

        public void ShowLoader()
        {
            if (!(Instance.Window.Content is Grid)) return;

            var grid = (Grid)Instance.Window.Content;
            var blurEffect = grid.Children[0].Effect as BlurEffect;
            if (blurEffect != null) blurEffect.Radius = 3;
            grid.IsEnabled = false;

            grid.Children[1].Visibility = Visibility.Visible;
        }

        public void HideLoader()
        {
            if (!(Instance.Window.Content is Grid)) return;

            var grid = (Grid)Instance.Window.Content;
            var blurEffect = grid.Children[0].Effect as BlurEffect;
            if (blurEffect != null) blurEffect.Radius = 0;
            grid.IsEnabled = true;

            grid.Children[1].Visibility = Visibility.Collapsed;
        }

        public void ReportProgress(int percent)
        {
            _textBlock.Text = $"{_text} {percent}%";
        }
    }

}