using System;
using NUnit.Framework;
using System.Xml;
using System.Globalization;

using Xamarin.Forms.Core.UnitTests;

namespace Xamarin.Forms.Xaml.UnitTests
{
	public class FooConverter : TypeConverter
	{
		public override object ConvertFromInvariantString (string value)
		{
			return new Foo { Value = value };
		}
	}

	public class BarConverter : TypeConverter
	{
		public override object ConvertFromInvariantString (string value)
		{
			return new Bar { Value = (string)value };
		}
	}

	public class QuxConverter : TypeConverter
	{
		public override object ConvertFromInvariantString (string value)
		{
			return new Qux { Value = (string)value };
		}
	}

	public class FooBarConverter : TypeConverter
	{
		public override object ConvertFromInvariantString (string value)
		{
			return new FooBar { Value = (string)value };
		}
	}

	public class Foo {
		public string Value { get; set; }
	}
	public class Bar {
		public string Value { get; set; }
	}
	public class Baz {
		public string Value { get; set; }
	}
	public class Qux {
		public string Value { get; set; }
	}

	[TypeConverter (typeof(FooBarConverter))]
	public class FooBar {
		public string Value { get; set; }
	}

	public class Bindable : BindableObject
	{
		[TypeConverter (typeof(FooConverter))]
		public Foo Foo { get; set; }

		public static readonly BindableProperty BarProperty = 
#pragma warning disable 618
			BindableProperty.Create<Bindable, Bar> (w => w.Bar, default(Bar));
#pragma warning restore 618

		[TypeConverter (typeof(BarConverter))]
		public Bar Bar {
			get { return (Bar)GetValue (BarProperty); }
			set { SetValue (BarProperty, value); } 
		}

		public Baz Baz { get; set; }

		public static readonly BindableProperty QuxProperty = 
#pragma warning disable 618
			BindableProperty.CreateAttached<Bindable, Qux> (bindable => GetQux (bindable), default(Qux));
#pragma warning restore 618

		[TypeConverter (typeof(QuxConverter))]
		public static Qux GetQux (BindableObject bindable)
		{
			return (Qux)bindable.GetValue (QuxProperty);
		}

		public static void SetQux (BindableObject bindable, Qux value)
		{
			bindable.SetValue (QuxProperty, value);
		}

		public FooBar FooBar { get; set; }
	}

	internal class MockNameSpaceResolver : IXmlNamespaceResolver
	{
		public System.Collections.Generic.IDictionary<string, string> GetNamespacesInScope (XmlNamespaceScope scope)
		{
			throw new NotImplementedException ();
		}

		public string LookupNamespace (string prefix)
		{
			return "";
		}

		public string LookupPrefix (string namespaceName)
		{
			return "";
		}
	}

	[TestFixture]
	public class TypeConverterTestsLegacy : BaseTestFixture
	{
		[Test]
		public void TestSetPropertyWithoutConverter ()
		{
			var baz = new Baz ();
			var node = new ValueNode (baz, new MockNameSpaceResolver());
			var bindable = new Bindable ();

			Assert.IsNull (bindable.Baz);
			var rootNode = new XamlLoader.RuntimeRootNode (new XmlType("clr-namespace:Xamarin.Forms.Xaml.UnitTests;assembly=Xamarin.Forms.Xaml.UnitTests","Bindable",null), bindable, null) {
				Properties = {
					{ new XmlName (null, "Baz"), node },
				}
			};
			var context = new HydratationContext { RootElement = new Label () };
			rootNode.Accept (new CreateValuesVisitor(context), null);
			node.Accept (new ApplyPropertiesVisitor (context), rootNode);
			Assert.AreEqual (baz, bindable.Baz);
		
		}

		[Test]
		public void TestFailOnMissingOrWrongConverter ()
		{
			var node = new ValueNode ("baz", new MockNameSpaceResolver());
			var bindable = new Bindable ();

			Assert.IsNull (bindable.Baz);
			var rootNode = new XamlLoader.RuntimeRootNode (new XmlType("clr-namespace:Xamarin.Forms.Xaml.UnitTests;assembly=Xamarin.Forms.Xaml.UnitTests","Bindable",null), bindable, null) {
				Properties = {
					{ new XmlName (null, "Baz"), node },
				}
			};
			var context = new HydratationContext { RootElement = new Label () };
			rootNode.Accept (new CreateValuesVisitor (context), null);
			Assert.Throws<XamlParseException>(()=> node.Accept (new ApplyPropertiesVisitor (context), rootNode));
		}

		[Test]
		public void TestConvertNonBindableProperty ()
		{
			var node = new ValueNode ("foo", new MockNameSpaceResolver());
			var bindable = new Bindable ();

			Assert.IsNull (bindable.Foo);
			var rootNode = new XamlLoader.RuntimeRootNode (new XmlType("clr-namespace:Xamarin.Forms.Xaml.UnitTests;assembly=Xamarin.Forms.Xaml.UnitTests","Bindable",null), bindable, null) {
				Properties = {
					{ new XmlName (null, "Foo"), node },
				}
			};

			var context = new HydratationContext { RootElement = new Label () };
			rootNode.Accept (new CreateValuesVisitor(context), null);
			node.Accept (new ApplyPropertiesVisitor (context), rootNode);
			Assert.IsNotNull (bindable.Foo);
			Assert.That (bindable.Foo, Is.TypeOf<Foo> ());
			Assert.AreEqual ("foo", bindable.Foo.Value);
		}

		[Test]
		public void TestConvertBindableProperty ()
		{
			var node = new ValueNode ("bar", new MockNameSpaceResolver());
			var bindable = new Bindable ();

			Assert.IsNull (bindable.Bar);
			var rootNode = new XamlLoader.RuntimeRootNode (new XmlType("clr-namespace:Xamarin.Forms.Xaml.UnitTests;assembly=Xamarin.Forms.Xaml.UnitTests","Bindable",null), bindable, null) {
				Properties = {
					{ new XmlName (null, "Bar"), node },
				}
			};
			var context = new HydratationContext { RootElement = new Label () };
			rootNode.Accept (new CreateValuesVisitor(context), null);
			node.Accept (new ApplyPropertiesVisitor (context), rootNode);
			Assert.IsNotNull (bindable.Bar);
			Assert.That (bindable.Bar, Is.TypeOf<Bar> ());
			Assert.AreEqual ("bar", bindable.Bar.Value);
		}

		[Test]
		public void TestConvertAttachedBindableProperty ()
		{
			var node = new ValueNode ("qux", new MockNameSpaceResolver());
			var bindable = new Bindable ();

			Assert.IsNull (Bindable.GetQux (bindable));
			var rootNode = new XamlLoader.RuntimeRootNode (new XmlType("clr-namespace:Xamarin.Forms.Xaml.UnitTests;assembly=Xamarin.Forms.Xaml.UnitTests","Bindable",null), bindable, null) {
				Properties = {
					{ new XmlName ("clr-namespace:Xamarin.Forms.Xaml.UnitTests;assembly=Xamarin.Forms.Xaml.UnitTests", "Bindable.Qux"), node },
				}
			};
			var context = new HydratationContext { RootElement = new Label () };
			rootNode.Accept (new CreateValuesVisitor (context), null);
			node.Accept (new ApplyPropertiesVisitor (context), rootNode);
			Assert.IsNotNull (Bindable.GetQux (bindable));
			Assert.That (Bindable.GetQux (bindable), Is.TypeOf<Qux> ());
			Assert.AreEqual ("qux", Bindable.GetQux (bindable).Value);
		}

		[Test]
		public void TestConvertWithAttributeOnType ()
		{
			var node = new ValueNode ("foobar", new MockNameSpaceResolver());
			var bindable = new Bindable ();

			Assert.IsNull (bindable.FooBar);
			var rootNode = new XamlLoader.RuntimeRootNode (new XmlType("clr-namespace:Xamarin.Forms.Xaml.UnitTests;assembly=Xamarin.Forms.Xaml.UnitTests","Bindable",null), bindable, null) {
				Properties = {
					{ new XmlName (null, "FooBar"), node },
				}
			};
			var context = new HydratationContext { RootElement = new Label () };
			rootNode.Accept (new CreateValuesVisitor (context), null);
			node.Accept (new ApplyPropertiesVisitor (context), rootNode);

			Assert.IsNotNull (bindable.FooBar);
			Assert.That (bindable.FooBar, Is.TypeOf<FooBar> ());
			Assert.AreEqual ("foobar", bindable.FooBar.Value);
		}

		#if !WINDOWS_PHONE
		[Test]
		[SetCulture ("fr-FR")]
		public void TestCultureOnThicknessFR ()
		{
			TestCultureOnThickness ();
		}
		#endif

		[Test]
		#if !WINDOWS_PHONE
		[SetCulture ("en-GB")]
		#endif
		public void TestCultureOnThicknessEN ()
		{
			TestCultureOnThickness ();
		}

		public void TestCultureOnThickness ()
		{
			var xaml = @"<Page Padding=""1.1, 2""/>";
			var page = new Page ().LoadFromXaml (xaml);
			Assert.AreEqual (new Thickness (1.1, 2), page.Padding);
		}
	}
}