// 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.

#nullable disable

using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using NUnit.Framework;
using osu.Framework.Allocation;
using osu.Framework.Extensions.IEnumerableExtensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Testing;
using osu.Framework.Threading;
using osu.Framework.Utils;
using osu.Game.Graphics.Sprites;
using osu.Game.Rulesets.Judgements;
using osu.Game.Rulesets.Mania.Scoring;
using osu.Game.Rulesets.Mods;
using osu.Game.Rulesets.Objects;
using osu.Game.Rulesets.Osu;
using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Rulesets.Osu.Scoring;
using osu.Game.Rulesets.Scoring;
using osu.Game.Rulesets.Taiko.Scoring;
using osu.Game.Rulesets.UI;
using osu.Game.Scoring;
using osu.Game.Screens.Play.HUD.HitErrorMeters;

namespace osu.Game.Tests.Visual.Gameplay
{
    public class TestSceneHitErrorMeter : OsuTestScene
    {
        [Cached(typeof(ScoreProcessor))]
        private TestScoreProcessor scoreProcessor = new TestScoreProcessor();

        [Cached(typeof(DrawableRuleset))]
        private TestDrawableRuleset drawableRuleset = new TestDrawableRuleset();

        [SetUpSteps]
        public void SetUp()
        {
            AddStep("reset score processor", () => scoreProcessor.Reset());
        }

        [Test]
        public void TestBasic()
        {
            AddStep("create display", () => recreateDisplay(new OsuHitWindows(), 5));

            AddRepeatStep("New random judgement", () =>
            {
                double offset = RNG.Next(-150, 150);
                newJudgement(offset, drawableRuleset.HitWindows.ResultFor(offset));
            }, 400);

            AddRepeatStep("New max negative", () => newJudgement(-drawableRuleset.HitWindows.WindowFor(HitResult.Meh)), 20);
            AddRepeatStep("New max positive", () => newJudgement(drawableRuleset.HitWindows.WindowFor(HitResult.Meh)), 20);
            AddStep("New fixed judgement (50ms)", () => newJudgement(50));

            ScheduledDelegate del = null;
            AddStep("Judgement barrage", () =>
            {
                int runCount = 0;

                del = Scheduler.AddDelayed(() =>
                {
                    newJudgement(runCount++ / 10f);

                    if (runCount == 500)
                        // ReSharper disable once AccessToModifiedClosure
                        del?.Cancel();
                }, 10, true);
            });
            AddUntilStep("wait for barrage", () => del.Cancelled);
        }

        [Test]
        public void TestOsu()
        {
            AddStep("OD 1", () => recreateDisplay(new OsuHitWindows(), 1));
            AddStep("OD 10", () => recreateDisplay(new OsuHitWindows(), 10));
        }

        [Test]
        public void TestTaiko()
        {
            AddStep("OD 1", () => recreateDisplay(new TaikoHitWindows(), 1));
            AddStep("OD 10", () => recreateDisplay(new TaikoHitWindows(), 10));
        }

        [Test]
        public void TestMania()
        {
            AddStep("OD 1", () => recreateDisplay(new ManiaHitWindows(), 1));
            AddStep("OD 10", () => recreateDisplay(new ManiaHitWindows(), 10));
        }

        [Test]
        public void TestEmpty()
        {
            AddStep("empty windows", () => recreateDisplay(HitWindows.Empty, 5));

            AddStep("hit", () => newJudgement());
            AddAssert("no bars added", () => !this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddAssert("circle added", () =>
                this.ChildrenOfType<ColourHitErrorMeter>().All(
                    meter => meter.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Count() == 1));

            AddStep("miss", () => newJudgement(50, HitResult.Miss));
            AddAssert("no bars added", () => !this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddAssert("circle added", () =>
                this.ChildrenOfType<ColourHitErrorMeter>().All(
                    meter => meter.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Count() == 2));
        }

        [Test]
        public void TestBonus()
        {
            AddStep("OD 1", () => recreateDisplay(new OsuHitWindows(), 1));

            AddStep("small bonus", () => newJudgement(result: HitResult.SmallBonus));
            AddAssert("no bars added", () => !this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddAssert("no circle added", () => !this.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Any());

            AddStep("large bonus", () => newJudgement(result: HitResult.LargeBonus));
            AddAssert("no bars added", () => !this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddAssert("no circle added", () => !this.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Any());
        }

        [Test]
        public void TestIgnore()
        {
            AddStep("OD 1", () => recreateDisplay(new OsuHitWindows(), 1));

            AddStep("ignore hit", () => newJudgement(result: HitResult.IgnoreHit));
            AddAssert("no bars added", () => !this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddAssert("no circle added", () => !this.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Any());

            AddStep("ignore miss", () => newJudgement(result: HitResult.IgnoreMiss));
            AddAssert("no bars added", () => !this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddAssert("no circle added", () => !this.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Any());
        }

        [Test]
        public void TestProcessingWhileHidden()
        {
            const int max_displayed_judgements = 20;
            AddStep("OD 1", () => recreateDisplay(new OsuHitWindows(), 1));

            AddStep("hide displays", () =>
            {
                foreach (var hitErrorMeter in this.ChildrenOfType<HitErrorMeter>())
                    hitErrorMeter.Hide();
            });

            AddRepeatStep("hit", () => newJudgement(), max_displayed_judgements * 2);

            AddAssert("bars added", () => this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddAssert("circle added", () => this.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Any());

            AddUntilStep("wait for bars to disappear", () => !this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddUntilStep("ensure max circles not exceeded", () =>
                this.ChildrenOfType<ColourHitErrorMeter>().First().ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Count(), () => Is.LessThanOrEqualTo(max_displayed_judgements));

            AddStep("show displays", () =>
            {
                foreach (var hitErrorMeter in this.ChildrenOfType<HitErrorMeter>())
                    hitErrorMeter.Show();
            });
        }

        [Test]
        public void TestClear()
        {
            AddStep("OD 1", () => recreateDisplay(new OsuHitWindows(), 1));

            AddStep("hit", () => newJudgement(0.2D));
            AddAssert("bar added", () => this.ChildrenOfType<BarHitErrorMeter>().All(
                meter => meter.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Count() == 1));
            AddAssert("circle added", () => this.ChildrenOfType<ColourHitErrorMeter>().All(
                meter => meter.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Count() == 1));

            AddStep("clear", () => this.ChildrenOfType<HitErrorMeter>().ForEach(meter => meter.Clear()));

            AddAssert("bar cleared", () => !this.ChildrenOfType<BarHitErrorMeter.JudgementLine>().Any());
            AddAssert("colour cleared", () => !this.ChildrenOfType<ColourHitErrorMeter.HitErrorShape>().Any());
        }

        private void recreateDisplay(HitWindows hitWindows, float overallDifficulty)
        {
            hitWindows?.SetDifficulty(overallDifficulty);

            drawableRuleset.HitWindows = hitWindows;

            Clear();

            Add(new FillFlowContainer
            {
                Anchor = Anchor.Centre,
                Origin = Anchor.Centre,
                Direction = FillDirection.Vertical,
                AutoSizeAxes = Axes.Both,
                Children = new[]
                {
                    new OsuSpriteText { Text = $@"Great: {hitWindows?.WindowFor(HitResult.Great)}" },
                    new OsuSpriteText { Text = $@"Good: {hitWindows?.WindowFor(HitResult.Ok)}" },
                    new OsuSpriteText { Text = $@"Meh: {hitWindows?.WindowFor(HitResult.Meh)}" },
                }
            });

            Add(new BarHitErrorMeter
            {
                Anchor = Anchor.CentreRight,
                Origin = Anchor.CentreRight,
            });

            Add(new BarHitErrorMeter
            {
                Anchor = Anchor.CentreLeft,
                Origin = Anchor.CentreLeft,
            });

            Add(new BarHitErrorMeter
            {
                Anchor = Anchor.BottomCentre,
                Origin = Anchor.CentreLeft,
                Rotation = 270,
            });

            Add(new ColourHitErrorMeter
            {
                Anchor = Anchor.CentreRight,
                Origin = Anchor.CentreRight,
                Margin = new MarginPadding { Right = 50 }
            });

            Add(new ColourHitErrorMeter
            {
                Anchor = Anchor.CentreLeft,
                Origin = Anchor.CentreLeft,
                Margin = new MarginPadding { Left = 50 }
            });

            Add(new ColourHitErrorMeter
            {
                Anchor = Anchor.BottomCentre,
                Origin = Anchor.CentreLeft,
                Rotation = 270,
                Margin = new MarginPadding { Left = 50 }
            });
        }

        private void newJudgement(double offset = 0, HitResult result = HitResult.Perfect)
        {
            scoreProcessor.ApplyResult(new JudgementResult(new HitCircle { HitWindows = drawableRuleset.HitWindows }, new Judgement())
            {
                TimeOffset = offset == 0 ? RNG.Next(-150, 150) : offset,
                Type = result,
            });
        }

        [SuppressMessage("ReSharper", "UnassignedGetOnlyAutoProperty")]
        private class TestDrawableRuleset : DrawableRuleset
        {
            public HitWindows HitWindows;

            public override IEnumerable<HitObject> Objects => new[] { new HitCircle { HitWindows = HitWindows } };

            public override event Action<JudgementResult> NewResult
            {
                add => throw new InvalidOperationException($"{nameof(NewResult)} operations not supported in test context");
                remove => throw new InvalidOperationException($"{nameof(NewResult)} operations not supported in test context");
            }

            public override event Action<JudgementResult> RevertResult
            {
                add => throw new InvalidOperationException($"{nameof(RevertResult)} operations not supported in test context");
                remove => throw new InvalidOperationException($"{nameof(RevertResult)} operations not supported in test context");
            }

            public override Playfield Playfield { get; }
            public override Container Overlays { get; }
            public override Container FrameStableComponents { get; }
            public override IFrameStableClock FrameStableClock { get; }
            internal override bool FrameStablePlayback { get; set; }
            public override IReadOnlyList<Mod> Mods { get; }

            public override double GameplayStartTime { get; }
            public override GameplayCursorContainer Cursor { get; }

            public TestDrawableRuleset()
                : base(new OsuRuleset())
            {
            }

            public override void SetReplayScore(Score replayScore) => throw new NotImplementedException();

            public override void SetRecordTarget(Score score) => throw new NotImplementedException();

            public override void RequestResume(Action continueResume) => throw new NotImplementedException();

            public override void CancelResume() => throw new NotImplementedException();
        }

        private class TestScoreProcessor : ScoreProcessor
        {
            public TestScoreProcessor()
                : base(new OsuRuleset())
            {
            }

            public void Reset() => base.Reset(false);
        }
    }
}