using System;
using NUnit.Framework;


namespace Xamarin.Forms.Core.UnitTests
{
	[TestFixture]
	public class TextCellTests : BaseTestFixture
	{
		[Test]
		public void TestTapped ()
		{
			var cell = new TextCell ();
			bool tapped = false;
			cell.Tapped += (sender, args) => tapped = true;

			cell.OnTapped();
			Assert.True (tapped);
		}

		[Test]
		public void TestCommand()
		{
			bool executed = false;

			var cmd = new Command (() => executed = true);
			var cell = new TextCell();
			cell.Command = cmd;
			cell.OnTapped();

			Assert.IsTrue (executed, "Command was not executed");
		}

		[Test]
		public void TestCommandParameter()
		{
			bool executed = false;

			object obj = new object();
			var cmd = new Command (p => {
				Assert.AreSame (obj, p);
				executed = true;
			});

			var cell = new TextCell {
				Command = cmd,
				CommandParameter = obj
			};

			cell.OnTapped();

			Assert.IsTrue (executed, "Command was not executed");
		}

		[Test]
		public void TestCommandCanExecute()
		{
			bool tested = false;

			var cmd = new Command (() => { },
				canExecute: () => {
					tested = true;
					return true;
				});

			new TextCell { Command = cmd };
			Assert.IsTrue (tested, "Command.CanExecute was not called");
		}

		[Test]
		public void TestCommandCanExecuteDisables()
		{
			var cmd = new Command (() => { }, () => false);
			var cell = new TextCell { Command = cmd };
			Assert.IsFalse (cell.IsEnabled, "Cell was not disabled");
		}

		[Test]
		public void TestCommandCanExecuteChanged()
		{
			bool first = true;
			var cmd = new Command (() => { }, () => {
				if (first) {
					first = false;
					return false;
				} else {
					return true;
				}
			});
			
			var cell = new TextCell { Command = cmd };
			Assert.IsFalse (cell.IsEnabled, "Cell was not disabled");

			cmd.ChangeCanExecute();

			Assert.IsTrue (cell.IsEnabled, "Cell was not reenabled");
		}

		[Test]
		public void Create ()
		{
			var template = new DataTemplate (typeof (TextCell));
			var content = template.CreateContent ();

			Assert.IsNotNull (content);
			Assert.That (content, Is.InstanceOf<TextCell> ());
		}

		[Test]
		public void Detail ()
		{
			var template = new DataTemplate (typeof (TextCell));
			template.SetValue (TextCell.DetailProperty, "detail");

			TextCell cell = (TextCell)template.CreateContent ();
			Assert.That (cell.Detail, Is.EqualTo ("detail"));
		}

		[Test]
		public void Text ()
		{
			var template = new DataTemplate (typeof (TextCell));
			template.SetValue (TextCell.TextProperty, "text");

			TextCell cell = (TextCell)template.CreateContent ();
			Assert.That (cell.Text, Is.EqualTo ("text"));
		}
	}
}