using System.Collections.Generic;
using System.Threading;
using System.Windows;
using Caliburn;
using Caliburn.Metadata;
using Caliburn.Services;
using MbUnit.Framework;

namespace Tests.Caliburn.The_core_framework_can
{
    [TestFixture(ApartmentState = ApartmentState.STA)]
    public class by_using_the_PresenterManager
    {
        private PresenterManager _manager;
        private TestPresenter _presenter;
        private DependencyObject _uiElement;
        
        [SetUp]
        public void Before_Each()
        {
            _manager = new PresenterManager();
            _presenter = new TestPresenter();
            _uiElement = new DependencyObject();
        }

        [Test]
        public void attach_a_presenter_to_any_DependencyObject()
        {
            _manager.AddBinding(_presenter, _uiElement);
            PresenterBinding binding = _manager.GetBinding(_uiElement);

            Assert.AreEqual(binding.Presenter, _presenter);
            Assert.AreEqual(binding.Target, _uiElement);
        }

        [Test]
        public void detach_a_presenter_from_its_bound_DependencyObject()
        {
            _manager.AddBinding(_presenter, _uiElement);
            _manager.RemoveBinding(_uiElement);

            PresenterBinding binding = _manager.GetBinding(_uiElement);

            Assert.AreEqual(PresenterBinding.NotFound, binding);
        }

        [Test]
        public void locate_all_DependencyObjects_bound_to_a_particular_presenter()
        {
            DependencyObject uiElement2 = new DependencyObject();

            _manager.AddBinding(_presenter, _uiElement);
            _manager.AddBinding(_presenter, uiElement2);

            IList<DependencyObject> elements = _manager.GetBoundViews(_presenter);

            Assert.AreEqual(2, elements.Count);
            Assert.AreEqual(_uiElement, elements[0]);
            Assert.AreEqual(uiElement2, elements[1]);
        }

        [Test]
        public void get_metadata_for_a_presenter()
        {
            PresenterInfo metadata = _manager.GetInfo(typeof(TestPresenter));

            Assert.IsNotNull(metadata);
        }
    }
}