// 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 System.Linq;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Game.Screens.Play.HUD;
using osu.Game.Skinning;
using osuTK.Graphics;

namespace osu.Game.Rulesets.Catch.Skinning.Legacy
{
    public class CatchLegacySkinTransformer : LegacySkinTransformer
    {
        /// <summary>
        /// For simplicity, let's use legacy combo font texture existence as a way to identify legacy skins from default.
        /// </summary>
        private bool providesComboCounter => this.HasFont(LegacyFont.Combo);

        public CatchLegacySkinTransformer(ISkinSource source)
            : base(source)
        {
        }

        public override Drawable GetDrawableComponent(ISkinComponent component)
        {
            if (component is SkinnableTargetComponent targetComponent && targetComponent.Target == SkinnableTarget.MainHUDComponents)
            {
                if (!providesComboCounter || !(Source.GetDrawableComponent(component) is SkinnableTargetComponentsContainer components))
                    return null;

                // catch may provide its own combo counter; hide the default.
                // todo: this should probably be done in an elegant way.
                foreach (var legacyComboCounter in components.OfType<LegacyComboCounter>())
                    legacyComboCounter.Expire();

                return components;
            }

            if (!(component is CatchSkinComponent catchSkinComponent))
                return null;

            switch (catchSkinComponent.Component)
            {
                case CatchSkinComponents.Fruit:
                    if (GetTexture("fruit-pear") != null)
                        return new LegacyFruitPiece();

                    break;

                case CatchSkinComponents.Banana:
                    if (GetTexture("fruit-bananas") != null)
                        return new LegacyBananaPiece();

                    break;

                case CatchSkinComponents.Droplet:
                    if (GetTexture("fruit-drop") != null)
                        return new LegacyDropletPiece();

                    break;

                case CatchSkinComponents.CatcherIdle:
                    return this.GetAnimation("fruit-catcher-idle", true, true, true) ??
                           this.GetAnimation("fruit-ryuuta", true, true, true);

                case CatchSkinComponents.CatcherFail:
                    return this.GetAnimation("fruit-catcher-fail", true, true, true) ??
                           this.GetAnimation("fruit-ryuuta", true, true, true);

                case CatchSkinComponents.CatcherKiai:
                    return this.GetAnimation("fruit-catcher-kiai", true, true, true) ??
                           this.GetAnimation("fruit-ryuuta", true, true, true);

                case CatchSkinComponents.CatchComboCounter:
                    if (providesComboCounter)
                        return new LegacyCatchComboCounter(Source);

                    break;
            }

            return null;
        }

        public override IBindable<TValue> GetConfig<TLookup, TValue>(TLookup lookup)
        {
            switch (lookup)
            {
                case CatchSkinColour colour:
                    var result = (Bindable<Color4>)Source.GetConfig<SkinCustomColourLookup, TValue>(new SkinCustomColourLookup(colour));
                    if (result == null)
                        return null;

                    result.Value = LegacyColourCompatibility.DisallowZeroAlpha(result.Value);
                    return (IBindable<TValue>)result;
            }

            return Source.GetConfig<TLookup, TValue>(lookup);
        }
    }
}