// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

using NUnit.Framework;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Utils;
using osuTK;
using osuTK.Graphics;

namespace osu.Framework.Tests.Visual.Containers
{
    public class TestSceneDrawSizePreservingFillContainer : FrameworkTestScene
    {
        public TestSceneDrawSizePreservingFillContainer()
        {
            DrawSizePreservingFillContainer fillContainer;

            Child = new Container
            {
                Anchor = Anchor.Centre,
                Origin = Anchor.Centre,
                Size = new Vector2(500),
                Children = new Drawable[]
                {
                    new Box
                    {
                        RelativeSizeAxes = Axes.Both,
                        Colour = Color4.Red,
                    },
                    new Container
                    {
                        RelativeSizeAxes = Axes.Both,
                        Padding = new MarginPadding(10),
                        Children = new Drawable[]
                        {
                            new Box
                            {
                                RelativeSizeAxes = Axes.Both,
                                Colour = Color4.Black,
                            },
                            fillContainer = new DrawSizePreservingFillContainer
                            {
                                Child = new TestSceneSizing(),
                            },
                        }
                    },
                }
            };

            AddStep("Strategy: Minimum", () => fillContainer.Strategy = DrawSizePreservationStrategy.Minimum);
            AddStep("Strategy: Maximum", () => fillContainer.Strategy = DrawSizePreservationStrategy.Maximum);
            AddStep("Strategy: Average", () => fillContainer.Strategy = DrawSizePreservationStrategy.Average);
            AddStep("Strategy: Separate", () => fillContainer.Strategy = DrawSizePreservationStrategy.Separate);

            AddSliderStep("Width", 50, 650, 500, v => Child.Width = v);
            AddSliderStep("Height", 50, 650, 500, v => Child.Height = v);

            AddStep("Override Size to 1x1", () => Child.Size = Vector2.One);
        }

        [Test]
        public void TestParentPadding()
        {
            Box fullBox = null;
            Box innerBox = null;

            AddStep("create container", () =>
            {
                Child = new Container
                {
                    Anchor = Anchor.Centre,
                    Origin = Anchor.Centre,
                    Size = new Vector2(512, 384),
                    Children = new Drawable[]
                    {
                        fullBox = new Box
                        {
                            RelativeSizeAxes = Axes.Both,
                            Colour = Color4.Red,
                        },
                        new Container
                        {
                            RelativeSizeAxes = Axes.Both,
                            Padding = new MarginPadding { Left = 100 },
                            Children = new Drawable[]
                            {
                                new DrawSizePreservingFillContainer
                                {
                                    Child = innerBox = new Box
                                    {
                                        Size = new Vector2(1024, 768),
                                        Colour = Color4.Pink,
                                        Alpha = 0.3f
                                    }
                                },
                            }
                        },
                    }
                };
            });

            AddAssert("inner box stops at edge of right box", () => Precision.AlmostEquals(fullBox.ScreenSpaceDrawQuad.TopRight, innerBox.ScreenSpaceDrawQuad.TopRight));
        }
    }
}