using Azimuth;
using UnitTestSharp;

namespace Glass.UnitTests
{
    public class ScrollBarMaterialTests : TestFixture
    {
        [IgnoreTest]
        private static ScrollTrackTests.FixedSizeMaterial Sized(Scalar width, Scalar height)
        {
            return new ScrollTrackTests.FixedSizeMaterial(new Vector(width, height));
        }

        public class PreferredThicknessTests : TestFixture
        {
            public void NoParts_IsZero()
            {
                CheckEqual(0, default(ScrollBarMaterial).PreferredThickness(Orientation.Vertical));
            }

            public void Vertical_IsTheWidthOfTheThickestPart()
            {
                var material = new ScrollBarMaterial
                {
                    DecrementButton = Sized(20, 20),
                    IncrementButton = Sized(16, 20),
                    Thumb = Sized(12, 30),
                    Track = Sized(8, 100),
                };

                CheckEqual(20, material.PreferredThickness(Orientation.Vertical));
            }

            public void Horizontal_IsTheHeightOfTheThickestPart()
            {
                var material = new ScrollBarMaterial
                {
                    DecrementButton = Sized(20, 14),
                    Thumb = Sized(30, 10),
                };

                CheckEqual(14, material.PreferredThickness(Orientation.Horizontal));
            }

            public void TheSameMaterial_ReadsAcrossWhicheverAxisTheBarRunsAlong()
            {
                var material = new ScrollBarMaterial { DecrementButton = Sized(20, 14) };

                CheckEqual(20, material.PreferredThickness(Orientation.Vertical));
                CheckEqual(14, material.PreferredThickness(Orientation.Horizontal));
            }

            public void EveryPartCounts_TheThumbTheTrackAndTheBackground()
            {
                var material = new ScrollBarMaterial { DecrementButton = Sized(10, 10) };

                material.Thumb = Sized(12, 10);
                CheckEqual(12, material.PreferredThickness(Orientation.Vertical));

                material.Track = Sized(14, 10);
                CheckEqual(14, material.PreferredThickness(Orientation.Vertical));

                material.Background = Sized(16, 10);
                CheckEqual(16, material.PreferredThickness(Orientation.Vertical));
            }

            public void EveryButtonCounts_TheIncrementAsWellAsTheDecrement()
            {
                var material = new ScrollBarMaterial
                {
                    DecrementButton = Sized(10, 10),
                    IncrementButton = Sized(18, 10),
                };

                CheckEqual(18, material.PreferredThickness(Orientation.Vertical));
            }

            public void APartThatFillsWhateverItIsGiven_HasNoPreferenceAndIsLeftOut()
            {
                var material = new ScrollBarMaterial { DecrementButton = Sized(20, 20), Track = new Material() };

                CheckEqual(20, material.PreferredThickness(Orientation.Vertical));
            }

            public void OnlyFillingParts_IsZero()
            {
                var material = new ScrollBarMaterial { Track = new Material() };

                CheckEqual(0, material.PreferredThickness(Orientation.Vertical));
            }
        }
    }
}