using System;
using NUnit.Framework;

namespace Xamarin.Forms.Core.UnitTests
{

	public class PanGestureRecognizerUnitTests : BaseTestFixture
	{
		[Test]
		public void PanRaisesStartedEventTest ()
		{
			var view = new View ();
			var pan = new PanGestureRecognizer ();

			GestureStatus target = GestureStatus.Canceled;
			pan.PanUpdated += (object sender, PanUpdatedEventArgs e) => {
				target = e.StatusType;
			};

			((IPanGestureController)pan).SendPanStarted (view, 0);
			Assert.AreEqual (GestureStatus.Started, target);
		}

		[Test]
		public void PanRaisesRunningEventTest ()
		{
			var view = new View ();
			var pan = new PanGestureRecognizer ();

			GestureStatus target = GestureStatus.Canceled;
			pan.PanUpdated += (object sender, PanUpdatedEventArgs e) => {
				target = e.StatusType;
			};

			((IPanGestureController)pan).SendPan (view, gestureId: 0, totalX: 5, totalY: 10);
			Assert.AreEqual (GestureStatus.Running, target);
		}

		[Test]
		public void PanRunningEventContainsTotalXTest ()
		{
			var view = new View ();
			var pan = new PanGestureRecognizer ();

			double target = 0;
			pan.PanUpdated += (object sender, PanUpdatedEventArgs e) => {
				target = e.TotalX;
			};

			((IPanGestureController)pan).SendPan (view, gestureId: 0, totalX: 5, totalY: 10);
			Assert.AreEqual (5, target);
		}

		[Test]
		public void PanRunningEventContainsTotalYTest ()
		{
			var view = new View ();
			var pan = new PanGestureRecognizer ();

			double target = 0;
			pan.PanUpdated += (object sender, PanUpdatedEventArgs e) => {
				target = e.TotalY;
			};

			((IPanGestureController)pan).SendPan (view, gestureId: 0, totalX: 5, totalY: 10);
			Assert.AreEqual (10, target);
		}

		[Test]
		public void PanRaisesCompletedEventTest ()
		{
			var view = new View ();
			var pan = new PanGestureRecognizer ();

			GestureStatus target = GestureStatus.Canceled;
			pan.PanUpdated += (object sender, PanUpdatedEventArgs e) => {
				target = e.StatusType;
			};

			((IPanGestureController)pan).SendPanCompleted (view, 0);
			Assert.AreEqual (GestureStatus.Completed, target);
		}

		[Test]
		public void PanRaisesCanceledEventTest ()
		{
			var view = new View ();
			var pan = new PanGestureRecognizer ();

			GestureStatus target = GestureStatus.Started;
			pan.PanUpdated += (object sender, PanUpdatedEventArgs e) => {
				target = e.StatusType;
			};

			((IPanGestureController)pan).SendPanCanceled (view, 0);
			Assert.AreEqual (GestureStatus.Canceled, target);
		}
	}
}