using System;

using Xamarin.Forms.CustomAttributes;
using System.Diagnostics;
using Xamarin.Forms.Internals;

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

namespace Xamarin.Forms.Controls
{
	[Preserve (AllMembers = true)]
	[Issue (IssueTracker.Github, 2965, "CarouselPage Disappearing event does not fire on Android")]
	public class Issue2965 : TestMasterDetailPage
	{
		static MasterDetailPage s_mdp;

		int _countAppearing;

		protected override void Init ()
		{
			s_mdp = this;
			
			var lblCount = new Label { AutomationId = "lblCount" };

			var myCarouselPage = new CarouselPage () {

				Children = {
					new ContentPage { 
						BackgroundColor = Color.Green,
						Content = new StackLayout {
							Children = {
								new Button { 
									AutomationId = "ShowMasterBtnPage1", 
									Text = "ShowMaster",
									Command = new Command(()=> s_mdp.IsPresented = true)
								},
								lblCount
							}
						}
					},
					new ContentPage { 
						BackgroundColor = Color.Red
					},
					new ContentPage { 
						BackgroundColor = Color.Lime,
					},
					new ContentPage { 
						BackgroundColor = Color.Purple,
					},
				}
			};

			var myCarouselDetailPage = new NavigationPage (myCarouselPage);

			var myPushButton = new Button () {
				Text = "Push Page", 
				HorizontalOptions = LayoutOptions.Start
			}; 

			myCarouselPage.Appearing += (sender, e) => {
				_countAppearing++;
				lblCount.Text = _countAppearing.ToString ();
			};
			myCarouselPage.Disappearing += (sender, e) => {
				_countAppearing--;
			};


			var mySecondDetailPage = new NavigationPage (new ContentPage () { 
				Title = "My Second Page", 

				Content = new StackLayout () {
					Orientation = StackOrientation.Vertical,
					Children = {
						new Button { 
							AutomationId = "ShowMasterBtnPage2", 
							Text = "ShowMaster",
							Command = new Command(()=> s_mdp.IsPresented = true)
						},
						myPushButton
					}
				}
			});

			myPushButton.Command = new Command (() => mySecondDetailPage.Navigation.PushAsync (new ContentPage () { Title = "My Pushed Page" }));

			var myMasterPage = new ContentPage () {
				Padding = new Thickness (0, 60, 0, 0),
				Title = "Menu",
				Content = new StackLayout () {
					Orientation = StackOrientation.Vertical,
					Children = {
						new Button () {
							Text = "Detail 1",
							AutomationId = "btnDetail1",
							Command = new Command (() => {
								Detail = myCarouselDetailPage;
								IsPresented = false;
							}),
							HorizontalOptions = LayoutOptions.Start
						},

						new Button () {
							Text = "Detail 2",
							AutomationId = "btnDetail2",
							Command = new Command (() => {
								Detail = mySecondDetailPage;
								IsPresented = false;
							}),
							HorizontalOptions = LayoutOptions.Start
						}

					}
				}
			};

			Master = myMasterPage;
			Detail = myCarouselDetailPage;
		}

#if UITEST
		[Test]
		[Ignore("Fails intermittently on TestCloud")]
		public void Issue2965Test ()
		{
			RunningApp.Screenshot ("I am at Issue 2965");
			var element = RunningApp.WaitForElement (q => q.Marked ("lblCount"))[0];
			Assert.That (element.Text, Is.EqualTo ("1"));

			if(RunningApp is iOSApp)
				RunningApp.Tap (q => q.Marked("Menu"));
			else
				RunningApp.Tap ("ShowMasterBtnPage1");

			RunningApp.Tap (q => q.Marked("btnDetail2"));

			if(RunningApp is iOSApp)
				RunningApp.Tap (q => q.Marked("Menu"));
			else
				RunningApp.Tap ("ShowMasterBtnPage2");
			
			RunningApp.Tap (q => q.Marked("btnDetail1"));
			element = RunningApp.WaitForElement (q => q.Marked ("lblCount"))[0];
			Assert.That (element.Text, Is.EqualTo ("1"));
		}
#endif
	}
}