// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using OpenTK;
using OpenTK.Graphics;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Game.Graphics;
using osu.Game.Graphics.Containers;
using osu.Game.Overlays.Changelog;
using osu.Game.Overlays.Changelog.Streams;

namespace osu.Game.Overlays
{
    public class ChangelogOverlay : WaveOverlayContainer
    {
        private readonly ScrollContainer scroll;

        public readonly ChangelogHeader header;
        public readonly ChangelogStreams streams;

        protected Color4 purple = new Color4(191, 4, 255, 255);

        public ChangelogOverlay()
        {
            // these possibly need adjusting?
            Waves.FirstWaveColour = OsuColour.FromHex(@"bf04ff");
            Waves.SecondWaveColour = OsuColour.FromHex(@"8F03BF");
            Waves.ThirdWaveColour = OsuColour.FromHex(@"600280");
            Waves.FourthWaveColour = OsuColour.FromHex(@"300140");

            Anchor = Anchor.TopCentre;
            Origin = Anchor.TopCentre;
            RelativeSizeAxes = Axes.Both;
            Width = 0.85f;
            Masking = true;

            EdgeEffect = new EdgeEffectParameters
            {
                Colour = Color4.Black.Opacity(0),
                Type = EdgeEffectType.Shadow,
                Radius = 3,
                Offset = new Vector2(0f, 1f),
            };

            Children = new Drawable[]
            {
                new Box
                {
                    RelativeSizeAxes = Axes.Both,
                    Colour = new Color4(20, 18, 23, 255)
                },
                scroll = new ScrollContainer
                {
                    RelativeSizeAxes = Axes.Both,
                    ScrollbarVisible = false,
                    Child = new ReverseChildIDFillFlowContainer<Drawable>
                    {
                        RelativeSizeAxes = Axes.X,
                        AutoSizeAxes = Axes.Y,
                        Direction = FillDirection.Vertical,
                        Children = new Drawable[]
                        {
                            header = new ChangelogHeader(),
                            streams = new ChangelogStreams(),
                        },
                    },
                },
            };
            streams.SelectedRelease.ValueChanged += r =>
            {
                if (streams.SelectedRelease.Value != null)
                    header.ShowReleaseStream(r.Name, string.Join(" ", r.Name, r.DisplayVersion));
            };
            streams.badgesContainer.OnLoadComplete += d =>
            {
                header.OnListingActivated += () =>
                {
                    streams.SelectedRelease.Value = null;
                    foreach (StreamBadge item in streams.badgesContainer.Children)
                    {
                        item.Activate(true);
                    }
                };
            };
        }

        // receive input outside our bounds so we can trigger a close event on ourselves.
        public override bool ReceiveMouseInputAt(Vector2 screenSpacePos) => true;

        protected override void PopIn()
        {
            base.PopIn();
            FadeEdgeEffectTo(0.25f, WaveContainer.APPEAR_DURATION, Easing.In);
        }

        protected override void PopOut()
        {
            base.PopOut();
            FadeEdgeEffectTo(0, WaveContainer.DISAPPEAR_DURATION, Easing.Out);
        }
    }
}