// 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 osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Beatmaps;
using osu.Game.Rulesets.Catch.Objects;
using osu.Game.Rulesets.Catch.Objects.Drawable;
using osu.Game.Rulesets.Judgements;
using osu.Game.Rulesets.Objects.Drawables;
using osu.Game.Rulesets.UI.Scrolling;

namespace osu.Game.Rulesets.Catch.UI
{
    public class CatchPlayfield : ScrollingPlayfield
    {
        public const float BASE_WIDTH = 512;

        protected override Container<Drawable> Content => content;
        private readonly Container<Drawable> content;

        private readonly CatcherArea catcherArea;

        protected override bool UserScrollSpeedAdjustment => false;

        public CatchPlayfield(BeatmapDifficulty difficulty, Func<CatchHitObject, DrawableHitObject<CatchHitObject>> getVisualRepresentation)
        {
            Direction.Value = ScrollingDirection.Down;

            Container explodingFruitContainer;

            Anchor = Anchor.TopCentre;
            Origin = Anchor.TopCentre;

            InternalChild = new Container
            {
                Anchor = Anchor.Centre,
                Origin = Anchor.Centre,
                RelativeSizeAxes = Axes.Both,
                FillMode = FillMode.Fit,
                FillAspectRatio = 4f / 3,
                Child = new ScalingContainer(BASE_WIDTH)
                {
                    RelativeSizeAxes = Axes.Both,
                    Children = new Drawable[]
                    {
                        explodingFruitContainer = new Container
                        {
                            RelativeSizeAxes = Axes.Both,
                        },
                        catcherArea = new CatcherArea(difficulty)
                        {
                            GetVisualRepresentation = getVisualRepresentation,
                            ExplodingFruitTarget = explodingFruitContainer,
                            Anchor = Anchor.BottomLeft,
                            Origin = Anchor.TopLeft,
                        },
                        content = new Container<Drawable>
                        {
                            RelativeSizeAxes = Axes.Both,
                        },
                    }
                }
            };
        }

        public bool CheckIfWeCanCatch(CatchHitObject obj) => catcherArea.AttemptCatch(obj);

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

            base.Add(h);

            var fruit = (DrawableCatchHitObject)h;
            fruit.CheckPosition = CheckIfWeCanCatch;
        }

        private void onNewResult(DrawableHitObject judgedObject, JudgementResult result)
            => catcherArea.OnResult((DrawableCatchHitObject)judgedObject, result);
    }
}