// 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 osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Extensions.IEnumerableExtensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Configuration;
using osu.Game.Rulesets.Scoring;
using osu.Game.Screens.Play.HUD.HitErrorMeters;

namespace osu.Game.Screens.Play.HUD
{
    public class HitErrorDisplay : Container<HitErrorMeter>
    {
        private const int fade_duration = 200;
        private const int margin = 10;

        private readonly Bindable<ScoreMeterType> type = new Bindable<ScoreMeterType>();

        private readonly HitWindows hitWindows;

        public HitErrorDisplay(HitWindows hitWindows)
        {
            this.hitWindows = hitWindows;

            RelativeSizeAxes = Axes.Both;
        }

        [BackgroundDependencyLoader]
        private void load(OsuConfigManager config)
        {
            config.BindWith(OsuSetting.ScoreMeter, type);
        }

        protected override void LoadComplete()
        {
            base.LoadComplete();
            type.BindValueChanged(typeChanged, true);
        }

        private void typeChanged(ValueChangedEvent<ScoreMeterType> type)
        {
            Children.ForEach(c => c.FadeOut(fade_duration, Easing.OutQuint));

            if (hitWindows == null)
                return;

            switch (type.NewValue)
            {
                case ScoreMeterType.HitErrorBoth:
                    createBar(Anchor.CentreLeft);
                    createBar(Anchor.CentreRight);
                    break;

                case ScoreMeterType.HitErrorLeft:
                    createBar(Anchor.CentreLeft);
                    break;

                case ScoreMeterType.HitErrorRight:
                    createBar(Anchor.CentreRight);
                    break;

                case ScoreMeterType.HitErrorBottom:
                    createBar(Anchor.BottomCentre);
                    break;

                case ScoreMeterType.ColourBoth:
                    createColour(Anchor.CentreLeft);
                    createColour(Anchor.CentreRight);
                    break;

                case ScoreMeterType.ColourLeft:
                    createColour(Anchor.CentreLeft);
                    break;

                case ScoreMeterType.ColourRight:
                    createColour(Anchor.CentreRight);
                    break;

                case ScoreMeterType.ColourBottom:
                    createColour(Anchor.BottomCentre);
                    break;
            }
        }

        private void createBar(Anchor anchor)
        {
            bool rightAligned = (anchor & Anchor.x2) > 0;
            bool bottomAligned = (anchor & Anchor.y2) > 0;

            var display = new BarHitErrorMeter(hitWindows, rightAligned)
            {
                Margin = new MarginPadding(margin),
                Anchor = anchor,
                Origin = bottomAligned ? Anchor.CentreLeft : anchor,
                Alpha = 0,
                Rotation = bottomAligned ? 270 : 0
            };

            completeDisplayLoading(display);
        }

        private void createColour(Anchor anchor)
        {
            bool bottomAligned = (anchor & Anchor.y2) > 0;

            var display = new ColourHitErrorMeter(hitWindows)
            {
                Margin = new MarginPadding(margin),
                Anchor = anchor,
                Origin = bottomAligned ? Anchor.CentreLeft : anchor,
                Alpha = 0,
                Rotation = bottomAligned ? 270 : 0
            };

            completeDisplayLoading(display);
        }

        private void completeDisplayLoading(HitErrorMeter display)
        {
            Add(display);
            display.FadeInFromZero(fade_duration, Easing.OutQuint);
        }
    }
}