using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Blacklight.Core.Cameras;
using Azimuth;

namespace Blacklight.Core.UnitTests.Cameras
{
    public class MicroscopeCameraTests : UnitTestSharp.TestFixture
    {
        public class Ctor : UnitTestSharp.TestFixture
        {
            public void EmptyCtor()
            {
                var camera = new MicroscopeCamera();
            }

            public void ViewportTests()
            {
                var viewport = new Viewport(800, 600);
                var camera = new MicroscopeCamera(viewport);
            }
        }

        public class ViewportTests : UnitTestSharp.TestFixture
        {
            Viewport viewport = new Viewport(800, 600);
            MicroscopeCamera camera;

            public override void TestSetup()
            {
                camera = new MicroscopeCamera(viewport);
            }
        }

        public class ZoomInAroundPointPSTests : UnitTestSharp.TestFixture
        {
            Viewport viewport = new Viewport(800, 600);
            MicroscopeCamera camera = new MicroscopeCamera();

            public void PointOnScreenDoesntMove()
            {
                camera.Magnification *= 100;

                Vector point = new Vector(200, -300);

                Vector pointWSOld = point;
                pointWSOld = camera.ProjectionToCamera.TransformPoint(pointWSOld);
                pointWSOld = camera.CameraToWorld.TransformPoint(pointWSOld);

                camera.SetZoomAroundPointPS(-10, point);

                Vector pointWSNew = point;
                pointWSNew = camera.ProjectionToCamera.TransformPoint(pointWSNew);
                pointWSNew = camera.CameraToWorld.TransformPoint(pointWSNew);

                CheckEqual(pointWSOld, pointWSNew);                                
            }
        }
    }
}