using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Animation;

namespace Gestor.Common.Helpers;

public static class ScrollAnimationBehavior
{
	public static DependencyProperty VerticalOffsetProperty = DependencyProperty.RegisterAttached("VerticalOffset", typeof(double), typeof(ScrollAnimationBehavior), (PropertyMetadata)new UIPropertyMetadata((object)0.0, new PropertyChangedCallback(OnVerticalOffsetChanged)));

	public static DependencyProperty TimeDurationProperty = DependencyProperty.RegisterAttached("TimeDuration", typeof(TimeSpan), typeof(ScrollAnimationBehavior), new PropertyMetadata((object)new TimeSpan(0, 0, 0, 0, 0)));

	public static DependencyProperty PointsToScrollProperty = DependencyProperty.RegisterAttached("PointsToScroll", typeof(double), typeof(ScrollAnimationBehavior), new PropertyMetadata((object)0.0));

	public static DependencyProperty IsEnabledProperty = DependencyProperty.RegisterAttached("IsEnabled", typeof(bool), typeof(ScrollAnimationBehavior), (PropertyMetadata)new UIPropertyMetadata((object)false, new PropertyChangedCallback(OnIsEnabledChanged)));

	private static double _currentToValue;

	private static Storyboard _storyboard;

	public static void SetTimeDuration(FrameworkElement target, TimeSpan value)
	{
		((DependencyObject)target).SetValue(TimeDurationProperty, (object)value);
	}

	public static TimeSpan GetTimeDuration(FrameworkElement target)
	{
		return (TimeSpan)((DependencyObject)target).GetValue(TimeDurationProperty);
	}

	public static void SetPointsToScroll(FrameworkElement target, double value)
	{
		((DependencyObject)target).SetValue(PointsToScrollProperty, (object)value);
	}

	private static void OnVerticalOffsetChanged(DependencyObject target, DependencyPropertyChangedEventArgs e)
	{
		ScrollViewer val = (ScrollViewer)(object)((target is ScrollViewer) ? target : null);
		if (val != null)
		{
			val.ScrollToVerticalOffset((double)e.NewValue);
		}
	}

	public static void SetIsEnabled(FrameworkElement target, bool value)
	{
		((DependencyObject)target).SetValue(IsEnabledProperty, (object)value);
	}

	private static void OnIsEnabledChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
	{
		//IL_0012: Unknown result type (might be due to invalid IL or missing references)
		//IL_001c: Expected O, but got Unknown
		ScrollViewer val = (ScrollViewer)(object)((sender is ScrollViewer) ? sender : null);
		if (val != null)
		{
			((FrameworkElement)val).Loaded += new RoutedEventHandler(ScrollerLoaded);
		}
	}

	private static void AnimateScroll(ScrollViewer scrollViewer)
	{
		//IL_0000: Unknown result type (might be due to invalid IL or missing references)
		//IL_0005: Unknown result type (might be due to invalid IL or missing references)
		//IL_000c: Unknown result type (might be due to invalid IL or missing references)
		//IL_0017: Expected O, but got Unknown
		//IL_002c: Unknown result type (might be due to invalid IL or missing references)
		//IL_0031: Unknown result type (might be due to invalid IL or missing references)
		//IL_003b: Expected O, but got Unknown
		//IL_0050: Unknown result type (might be due to invalid IL or missing references)
		//IL_0055: Unknown result type (might be due to invalid IL or missing references)
		//IL_005a: Unknown result type (might be due to invalid IL or missing references)
		//IL_0066: Expected O, but got Unknown
		//IL_0061: Unknown result type (might be due to invalid IL or missing references)
		//IL_006b: Expected O, but got Unknown
		//IL_006c: Unknown result type (might be due to invalid IL or missing references)
		//IL_0076: Expected O, but got Unknown
		//IL_0093: Unknown result type (might be due to invalid IL or missing references)
		//IL_009d: Expected O, but got Unknown
		DoubleAnimationUsingKeyFrames val = new DoubleAnimationUsingKeyFrames
		{
			Duration = new Duration(GetTimeDuration((FrameworkElement)(object)scrollViewer))
		};
		val.KeyFrames.Add((DoubleKeyFrame)new EasingDoubleKeyFrame(scrollViewer.VerticalOffset, KeyTime.FromPercent(0.0)));
		val.KeyFrames.Add((DoubleKeyFrame)new EasingDoubleKeyFrame(_currentToValue, KeyTime.FromPercent(1.0), (IEasingFunction)new SineEase
		{
			EasingMode = (EasingMode)1
		}));
		_storyboard = new Storyboard();
		((TimelineGroup)_storyboard).Children.Add((Timeline)(object)val);
		Storyboard.SetTarget((DependencyObject)(object)val, (DependencyObject)(object)scrollViewer);
		Storyboard.SetTargetProperty((DependencyObject)(object)val, new PropertyPath((object)VerticalOffsetProperty));
		_storyboard.Begin();
	}

	private static void SetEventHandlersForScrollViewer(ScrollViewer scroller)
	{
		//IL_0008: Unknown result type (might be due to invalid IL or missing references)
		//IL_0012: Expected O, but got Unknown
		((UIElement)scroller).PreviewMouseWheel += new MouseWheelEventHandler(ScrollViewerPreviewMouseWheel);
	}

	private static void ScrollerLoaded(object sender, RoutedEventArgs e)
	{
		SetEventHandlersForScrollViewer((ScrollViewer)((sender is ScrollViewer) ? sender : null));
	}

	private static void ScrollViewerPreviewMouseWheel(object sender, MouseWheelEventArgs e)
	{
		//IL_000e: Unknown result type (might be due to invalid IL or missing references)
		//IL_0014: Expected O, but got Unknown
		//IL_0035: Unknown result type (might be due to invalid IL or missing references)
		//IL_003b: Invalid comparison between Unknown and I4
		double currentToValue = _currentToValue;
		double num = e.Delta;
		ScrollViewer val = (ScrollViewer)sender;
		double num2 = num * 2.0 / 3.0;
		if (_storyboard == null || (int)_storyboard.GetCurrentState() == 1)
		{
			_currentToValue = val.VerticalOffset;
		}
		_currentToValue = ((num2 > _currentToValue) ? 0.0 : ((_currentToValue - num2 > val.ScrollableHeight) ? val.ScrollableHeight : (_currentToValue - num2)));
		if (_currentToValue != val.VerticalOffset && _currentToValue != currentToValue)
		{
			AnimateScroll(val);
		}
		((RoutedEventArgs)e).Handled = true;
	}
}