using NUnit.Framework;
using System.Linq;

namespace Encompass
{
    namespace Tests {
        struct MockComponent : IComponent {
            public string myString;
            public int myInt;
        }

        public class EntityTest
        {
            [Test]
            public void AddComponent()
            {
                var world = new World();
                var entity = world.CreateEntity();

                MockComponent mockComponent;
                mockComponent.myInt = 3;
                mockComponent.myString = "hello";

                entity.AddComponent<MockComponent>(mockComponent);

                world.Update();

                Assert.IsTrue(entity.HasComponent<MockComponent>());
                Assert.AreEqual(mockComponent, entity.GetComponent<MockComponent>());
            }

            [Test]
            public void GetComponents()
            {
                var world = new World();
                var entity = world.CreateEntity();

                MockComponent mockComponentA;
                mockComponentA.myInt = 3;
                mockComponentA.myString = "hello";

                MockComponent mockComponentB;
                mockComponentB.myInt = 5;
                mockComponentB.myString = "wassup";

                MockComponent mockComponentC;
                mockComponentC.myInt = 1;
                mockComponentC.myString = "howdy";

                entity.AddComponent<MockComponent>(mockComponentA);
                entity.AddComponent<MockComponent>(mockComponentB);
                entity.AddComponent<MockComponent>(mockComponentC);

                world.Update();

                Assert.Contains(mockComponentA, entity.GetComponents<MockComponent>().ToList());
                Assert.Contains(mockComponentB, entity.GetComponents<MockComponent>().ToList());
                Assert.Contains(mockComponentC, entity.GetComponents<MockComponent>().ToList());
            }

            [Test]
            public void GetComponent()
            {
                var world = new World();
                var entity = world.CreateEntity();

                MockComponent mockComponent;
                mockComponent.myInt = 3;
                mockComponent.myString = "hello";

                entity.AddComponent<MockComponent>(mockComponent);

                world.Update();

                Assert.AreEqual(mockComponent, entity.GetComponent<MockComponent>());
            }

            [Test]
            public void HasComponent()
            {
                var world = new World();
                var entity = world.CreateEntity();

                MockComponent mockComponent;
                mockComponent.myInt = 3;
                mockComponent.myString = "hello";

                entity.AddComponent<MockComponent>(mockComponent);

                world.Update();

                Assert.IsTrue(entity.HasComponent<MockComponent>());
            }
        }
    }
}