// 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 osuTK;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Rulesets.Objects.Drawables;
using osu.Game.Rulesets.Osu.Objects;
using osu.Game.Rulesets.Osu.Objects.Drawables;
using osu.Game.Rulesets.Osu.Objects.Drawables.Connections;
using osu.Game.Rulesets.UI;
using System.Linq;
using osu.Game.Rulesets.Judgements;

namespace osu.Game.Rulesets.Osu.UI
{
    public class OsuPlayfield : Playfield
    {
        private readonly Container approachCircles;
        private readonly JudgementContainer<DrawableOsuJudgement> judgementLayer;
        private readonly ConnectionRenderer<OsuHitObject> connectionLayer;

        public static readonly Vector2 BASE_SIZE = new Vector2(512, 384);

        public OsuPlayfield()
        {
            Anchor = Anchor.Centre;
            Origin = Anchor.Centre;

            Size = new Vector2(0.75f);

            InternalChild = new PlayfieldAdjustmentContainer
            {
                RelativeSizeAxes = Axes.Both,
                Children = new Drawable[]
                {
                    connectionLayer = new FollowPointRenderer
                    {
                        RelativeSizeAxes = Axes.Both,
                        Depth = 2,
                    },
                    judgementLayer = new JudgementContainer<DrawableOsuJudgement>
                    {
                        RelativeSizeAxes = Axes.Both,
                        Depth = 1,
                    },
                    HitObjectContainer,
                    approachCircles = new Container
                    {
                        RelativeSizeAxes = Axes.Both,
                        Depth = -1,
                    },
                }
            };
        }

        public override void Add(DrawableHitObject h)
        {
            h.OnNewResult += onNewResult;

            var c = h as IDrawableHitObjectWithProxiedApproach;
            if (c != null)
                approachCircles.Add(c.ProxiedLayer.CreateProxy());

            base.Add(h);
        }

        public override void PostProcess()
        {
            connectionLayer.HitObjects = HitObjectContainer.Objects.Select(d => d.HitObject).OfType<OsuHitObject>();
        }

        private void onNewResult(DrawableHitObject judgedObject, JudgementResult result)
        {
            if (!judgedObject.DisplayResult || !DisplayJudgements)
                return;

            DrawableOsuJudgement explosion = new DrawableOsuJudgement(result, judgedObject)
            {
                Origin = Anchor.Centre,
                Position = ((OsuHitObject)judgedObject.HitObject).StackedEndPosition,
                Scale = new Vector2(((OsuHitObject)judgedObject.HitObject).Scale * 1.65f)
            };

            judgementLayer.Add(explosion);
        }

        public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => HitObjectContainer.ReceivePositionalInputAt(screenSpacePos);
    }
}