using System;
using Azimuth;
using Blacklight.Core.Drawables;

namespace Glass.Blacklight.UnitTests
{
    public class TintSpaceAdapterTests : UnitTestSharp.TestFixture
    {
        public void SameCount()
        {
            CheckEqual((int)FillSpace.Count, (int)Glass.TintSpace.Count);
        }

        public void ToBlacklightMethodReturnsCorrectValue()
        {
            for (int i = 0; i < (int)Glass.TintSpace.Count; ++i)
            {
                string actual = ((Glass.TintSpace)i).ToBlacklight().ToString();
                string expected = ((FillSpace)i).ToString();
                CheckEqual(expected, actual);
            }
        }

        public void AnUnknownSpace_Throws()
        {
            CheckThrow(typeof(InvalidOperationException));
            ((Glass.TintSpace)99).ToBlacklight();
        }

        public class TintTransformForTests : UnitTestSharp.TestFixture
        {
            private static readonly AffineMatrix Moved = AffineMatrix.BuildFromTranslation(new Vector(3, 4));

            public void Screen_ScalesTheWholeTransform()
            {
                AffineMatrix scaled = TintSpaceAdapter.TintTransformFor(Moved, FillSpace.Screen, uiScale: 2);

                CheckEqual(new AffineMatrix(0, new Vector(6, 8), new Vector(2, 2)), scaled);
            }

            public void Screen_AtAScaleOfOne_LeavesItAlone()
            {
                CheckEqual(Moved, TintSpaceAdapter.TintTransformFor(Moved, FillSpace.Screen, uiScale: 1));
            }

            public void Model_LeavesItAloneWhateverTheScale()
            {
                CheckEqual(Moved, TintSpaceAdapter.TintTransformFor(Moved, FillSpace.Model, uiScale: 2));
            }
        }
    }
}