// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using System;
using System.Collections.Generic;
using System.Linq;
using NUnit.Framework;
using osu.Framework.Allocation;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.Sprites;
using osu.Game.Beatmaps;
using osu.Game.Beatmaps.ControlPoints;
using osu.Game.Rulesets.Mania.Objects;
using osu.Game.Rulesets.Mania.Objects.Drawables;
using osu.Game.Rulesets.Objects.Drawables;
using osu.Game.Rulesets.Objects.Types;
using osu.Game.Rulesets.UI.Scrolling;
using osu.Game.Tests.Visual;
using OpenTK;
using OpenTK.Graphics;

namespace osu.Game.Rulesets.Mania.Tests
{
    [TestFixture]
    public class TestCaseNotes : OsuTestCase
    {
        public override IReadOnlyList<Type> RequiredTypes => new[]
        {
            typeof(DrawableNote),
            typeof(DrawableHoldNote)
        };

        [BackgroundDependencyLoader]
        private void load()
        {
            Child = new FillFlowContainer
            {
                Anchor = Anchor.Centre,
                Origin = Anchor.Centre,
                AutoSizeAxes = Axes.Both,
                Direction = FillDirection.Horizontal,
                Spacing = new Vector2(20),
                Children = new[]
                {
                    createNoteDisplay(ScrollingDirection.Down),
                    createNoteDisplay(ScrollingDirection.Up),
                    createHoldNoteDisplay(ScrollingDirection.Down),
                    createHoldNoteDisplay(ScrollingDirection.Up),
                }
            };
        }

        private Drawable createNoteDisplay(ScrollingDirection direction)
        {
            var note = new Note { StartTime = 999999999 };
            note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());

            return new ScrollingTestContainer(direction)
            {
                AutoSizeAxes = Axes.Both,
                Child = new NoteContainer(direction, $"note, scrolling {direction.ToString().ToLower()}")
                {
                    Child = new DrawableNote(note, ManiaAction.Key1) { AccentColour = Color4.OrangeRed }
                }
            };
        }

        private Drawable createHoldNoteDisplay(ScrollingDirection direction)
        {
            var note = new HoldNote { StartTime = 999999999, Duration = 1000 };
            note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());

            return new ScrollingTestContainer(direction)
            {
                AutoSizeAxes = Axes.Both,
                Child = new NoteContainer(direction, $"hold note, scrolling {direction.ToString().ToLower()}")
                {
                    Child = new DrawableHoldNote(note, ManiaAction.Key1)
                    {
                        RelativeSizeAxes = Axes.Both,
                        AccentColour = Color4.OrangeRed,
                    }
                }
            };
        }

        private class NoteContainer : Container
        {
            private readonly Container content;
            protected override Container<Drawable> Content => content;

            private readonly ScrollingDirection direction;

            public NoteContainer(ScrollingDirection direction, string description)
            {
                this.direction = direction;
                AutoSizeAxes = Axes.Both;

                InternalChild = new FillFlowContainer
                {
                    AutoSizeAxes = Axes.Both,
                    Spacing = new Vector2(0, 10),
                    Direction = FillDirection.Vertical,
                    Children = new Drawable[]
                    {
                        new Container
                        {
                            Anchor = Anchor.TopCentre,
                            Origin = Anchor.TopCentre,
                            Width = 45,
                            Height = 100,
                            Children = new Drawable[]
                            {
                                new Box
                                {
                                    Anchor = Anchor.TopCentre,
                                    Origin = Anchor.TopCentre,
                                    RelativeSizeAxes = Axes.Both,
                                    Width = 1.25f,
                                    Colour = Color4.Black.Opacity(0.5f)
                                },
                                content = new Container { RelativeSizeAxes = Axes.Both }
                            }
                        },
                        new SpriteText
                        {
                            Anchor = Anchor.TopCentre,
                            Origin = Anchor.TopCentre,
                            TextSize = 14,
                            Text = description
                        }
                    }
                };
            }

            protected override void Update()
            {
                base.Update();

                foreach (var obj in content.OfType<DrawableHitObject>())
                {
                    if (!(obj.HitObject is IHasEndTime endTime))
                        continue;

                    if (!obj.HasNestedHitObjects)
                        continue;

                    foreach (var nested in obj.NestedHitObjects)
                    {
                        double finalPosition = (nested.HitObject.StartTime - obj.HitObject.StartTime) / endTime.Duration;
                        switch (direction)
                        {
                            case ScrollingDirection.Up:
                                nested.Y = (float)(finalPosition * content.DrawHeight);
                                break;
                            case ScrollingDirection.Down:
                                nested.Y = (float)(-finalPosition * content.DrawHeight);
                                break;
                        }
                    }
                }
            }
        }
    }
}