using System.Collections.Generic;
using NUnit.Framework;

using NContains = NUnit.Framework.Contains;

namespace Xamarin.Forms.Core.UnitTests
{
	[TestFixture]
	public class TableSectionTests : BaseTestFixture
	{
		[SetUp]
		public void Setup()
		{
			Device.PlatformServices = new MockPlatformServices ();
		}

		[TearDown]
		public void TearDown()
		{
			Device.PlatformServices = null;
		}

		[Test]
		public void Constructor ()
		{
			var section = new TableSection ("Title");
			Assert.AreEqual ("Title", section.Title);
			Assert.That (section, Is.Empty);
		}

		[Test]
		public void IsReadOnly ()
		{
			var section = new TableSection () as ICollection<Cell>;
			Assert.False (section.IsReadOnly);
		}

		[Test]
		public void Add ()
		{
			var section = new TableSection ();
			TextCell first, second;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			Assert.That (section, NContains.Item (first));
			Assert.That (section, NContains.Item (second));
		}

		[Test]
		public void Remove ()
		{
			var section = new TableSection ();
			TextCell first;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (new TextCell { Text = "Text" });

			var result = section.Remove (first);
			Assert.True (result);
			Assert.That (section, Has.No.Contains (first));
		}

		[Test]
		public void Clear ()
		{
			var section = new TableSection {new TextCell { Text = "Text" }, new TextCell { Text = "Text" }};
			section.Clear ();
			Assert.That (section, Is.Empty);
		}

		[Test]
		public void Contains ()
		{
			var section = new TableSection ();
			TextCell first, second;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			Assert.True (section.Contains (first));
			Assert.True (section.Contains (second));
		}

		[Test]
		public void IndexOf ()
		{
			var section = new TableSection ();
			TextCell first, second;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			Assert.AreEqual (0, section.IndexOf (first));
			Assert.AreEqual (1, section.IndexOf (second));
		}

		[Test]
		public void Insert ()
		{
			var section = new TableSection ();
			section.Add (new TextCell { Text = "Text" });
			section.Add (new TextCell { Text = "Text" });

			var third = new TextCell { Text = "Text" };
			section.Insert (1, third);
			Assert.AreEqual (third, section[1]);
		}

		[Test]
		public void RemoveAt ()
		{
			var section = new TableSection ();
			TextCell first, second;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			section.RemoveAt (0);
			Assert.That (section, Has.No.Contains (first));
		}

		[Test]
		public void Overwrite ()
		{
			var section = new TableSection ();
			TextCell second;
			section.Add (new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			var third = new TextCell { Text = "Text" };
			section[1] = third;

			Assert.AreEqual (third, section[1]);
			Assert.That (section, Has.No.Contains (second));
		}

		[Test]
		public void CopyTo ()
		{
			var section = new TableSection ();
			TextCell first, second;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			Cell[] cells = new Cell[2];
			section.CopyTo (cells, 0);

			Assert.AreEqual (first, cells[0]);
			Assert.AreEqual (second, cells[1]);
		}

		[Test]
		public void ChainsBindingContextOnSet ()
		{
			var section = new TableSection ();
			TextCell first, second;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			var bindingContext = "bindingContext";

			section.BindingContext = bindingContext;

			Assert.AreEqual (bindingContext, first.BindingContext);
			Assert.AreEqual (bindingContext, second.BindingContext);
		}

		[Test]
		public void ChainsBindingContextWithExistingContext ()
		{
			var section = new TableSection ();
			TextCell first, second;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			var bindingContext = "bindingContext";
			section.BindingContext = bindingContext;

			bindingContext = "newContext";
			section.BindingContext = bindingContext;

			Assert.AreEqual (bindingContext, first.BindingContext);
			Assert.AreEqual (bindingContext, second.BindingContext);
		}

		[Test]
		public void ChainsBindingContextToNewlyAdded ()
		{
			var section = new TableSection ();
			var bindingContext = "bindingContext";
			section.BindingContext = bindingContext;

			TextCell first, second;
			section.Add (first = new TextCell { Text = "Text" });
			section.Add (second = new TextCell { Text = "Text" });

			Assert.AreEqual (bindingContext, first.BindingContext);
			Assert.AreEqual (bindingContext, second.BindingContext);
		}

		[Test]
		public void TestBindingTitleSectionChange ()
		{
			var vm = new MockViewModel { Text = "FooBar" };
			var section = new TableSection ();

			section.BindingContext = vm;
			section.SetBinding (TableSectionBase.TitleProperty, "Text");

			Assert.AreEqual ("FooBar", section.Title);

			vm.Text = "Baz";
		
			Assert.AreEqual ("Baz", section.Title);
		}
	
		[Test]
		public void TestBindingTitle ()
		{
			var section = new TableSection ();
			var mock = new MockViewModel ();
			section.BindingContext = mock;
			section.SetBinding (TableSection.TitleProperty, new Binding ("Text"));

			Assert.AreEqual (mock.Text, section.Title);
		}
	}
}