using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;

#if UITEST
using NUnit.Framework;
using Xamarin.UITest;
using Xamarin.UITest.Queries;
#endif


namespace Xamarin.Forms.Controls.Issues
{
	[Preserve (AllMembers=true)]
	[Issue (IssueTracker.Github, 773, "Horizontal ScrollView locks after rotation", PlatformAffected.iOS)]
	public class Issue773 : TestNavigationPage
	{
		protected override void Init ()
		{
			PushAsync (new CannotScrollRepro ());
		}

#if UITEST
		[Test]
		[Issue (IssueTracker.Github, 773, "Horizontal ScrollView locks after rotation - relayout correctly after rotation", PlatformAffected.iOS)]
		[UiTest (typeof(ScrollView))]
		public void Issue773TestsRotationRelayoutIssue ()
		{
			RunningApp.SetOrientationLandscape ();

			var buttonLabels = new [] { 
				"Button 1",
				"Button 2",
				"Button 3",
			};

			foreach (string buttonLabel in buttonLabels)
				RunningApp.WaitForElement (q => q.Button (buttonLabel));

			RunningApp.Screenshot ("StackLayout in Modal respects rotation");

			RunningApp.SetOrientationPortrait ();
		}

		//[Test]
		//[Issue (IssueTracker.Github, 773, "Horizontal ScrollView locks after rotation - can scroll after rotation", PlatformAffected.iOS)]
		//[UiTest (typeof (ScrollView))]
		//public void Issue773TestsScrollingBeforeAndAfterRotation ()
		//{
//			ScrollHorizontalForEnd ();
//			App.WaitForElement (q => q.Marked ("I was clicked once!"));
//			App.Screenshot ("Scrolling successful before rotation");
//
//			App.SetOrientationLandscape ();
//			App.Tap (q => q.Marked ("Button 8"));
//			App.WaitForElement (q => q.Marked ("I was clicked again!"));
//			App.Screenshot ("Scrolling successful after rotation");
//
//			App.SetOrientationPortrait ();
//			App.Screenshot ("Can scroll back to beginning");
//
//			ScrollHorizontalForBeginning ();
//			App.Screenshot ("Can scroll back to beginning");
//		}

		//void ScrollHorizontalForEnd ()
		//{
		//	int count = 0;

		//	AppRect screenBounds = App.ScreenBounds ();

		//	float scrollXStart = (4 / 5.0f) * screenBounds.Width;
		//	float scrollXEnd = screenBounds.Width / 5;
		//	float scrollY = App.Query (q => q.Marked ("Button 1"))[0].Rect.CenterY;

		//	while (count < 4) {
		//		App.Pan (new Drag (screenBounds, scrollXStart, scrollY, scrollXEnd, scrollY, Drag.Direction.RightToLeft));
		//		count++;
		//	}

		//	App.Tap (q => q.Button ("Button 8"));
		//}

		//void ScrollHorizontalForBeginning ()
		//{
		//	int count = 0;

		//	AppRect screenBounds = App.ScreenBounds ();

		//	float scrollXStart = screenBounds.Width / 5;
		//	float scrollXEnd = (4 / 5.0f) * screenBounds.Width;
		//	float scrollY = App.Query (q => q.Button ("Button 8"))[0].Rect.CenterY;

		//	while (count < 4) {
		//		App.Pan (new Drag (screenBounds, scrollXStart, scrollY, scrollXEnd, scrollY, Drag.Direction.LeftToRight));
		//		count++;
		//	}

		//	App.Tap (q => q.Button ("Button 1"));

		//}
#endif
	}

	public class CannotScrollRepro : ContentPage
	{
		public CannotScrollRepro ()
		{
			Title = "Nav Bar";

			var layout = new StackLayout {
				Padding = new Thickness (20),
				BackgroundColor = Color.Gray
			};

			var button1 = new Button { Text = "Button 1" };
			var button2 = new Button { Text = "Button 2", IsEnabled = false };
			var button3 = new Button { Text = "Button 3", IsEnabled = false };
			var button4 = new Button { Text = "Button 4", IsEnabled = false };
			var button5 = new Button { Text = "Button 5", IsEnabled = false };
			var button6 = new Button { Text = "Button 6", IsEnabled = false };
			var button7 = new Button { Text = "Button 7", IsEnabled = false };
			var button8 = new Button { Text = "Button 8" };

			var label = new Label { Text = "Not Clicked" };

			var buttonStack = new StackLayout {
				Padding = new Thickness (30, 0),
				Orientation = StackOrientation.Horizontal,
				Spacing = 30,
				Children = {
					button1,
					button2,
					button3,
					button4,
					button5,
					button6,
					button7,
					button8,
				}
			};

			button1.Clicked += (sender, args) => Navigation.PopModalAsync ();

			int count = 0;
			button8.Clicked += (sender, e) => {
				if (count == 0) {
					label.Text = "I was clicked once!";
					count++;
				} else if (count == 1) {
					label.Text = "I was clicked again!";
					count++;
				} else if (count == 2) {
					label.Text = "I was clicked again again!";
				}
			};

			layout.Children.Add (new BoxView {
				BackgroundColor = Color.Red,
				VerticalOptions = LayoutOptions.FillAndExpand,
				HorizontalOptions = LayoutOptions.FillAndExpand
			});

			layout.Children.Add (label);

			layout.Children.Add(new ScrollView {
				BackgroundColor = Color.Aqua,
				Orientation = ScrollOrientation.Horizontal,
				HeightRequest = Device.RuntimePlatform == Device.WinRT || Device.RuntimePlatform == Device.UWP || Device.RuntimePlatform == Device.WinPhone ? 80 : 44,
				Content = buttonStack
			});

			Content = layout;
		}
	}
}