// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using OpenTK;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Game.Graphics.Sprites;
using System.Collections.Generic;
using System.Linq;
using osu.Framework.Allocation;

namespace osu.Game.Overlays.Settings
{
    public abstract class SettingsSubsection : FillFlowContainer, IHasFilterableChildren
    {
        protected override Container<Drawable> Content => FlowContent;

        protected readonly FillFlowContainer FlowContent;

        protected abstract string Header { get; }

        public IEnumerable<IFilterable> FilterableChildren => Children.OfType<IFilterable>();
        public IEnumerable<string> FilterTerms => new[] { Header };
        public bool MatchingFilter
        {
            set
            {
                this.FadeTo(value ? 1 : 0);
            }
        }

        protected SettingsSubsection()
        {
            RelativeSizeAxes = Axes.X;
            AutoSizeAxes = Axes.Y;
            Direction = FillDirection.Vertical;

            FlowContent = new FillFlowContainer
            {
                Direction = FillDirection.Vertical,
                Spacing = new Vector2(0, 5),
                RelativeSizeAxes = Axes.X,
                AutoSizeAxes = Axes.Y,
            };
        }

        [BackgroundDependencyLoader]
        private void load()
        {
            AddRangeInternal(new Drawable[]
            {
                new OsuSpriteText
                {
                    Text = Header.ToUpper(),
                    Margin = new MarginPadding { Bottom = 10 },
                    Font = @"Exo2.0-Black",
                },
                FlowContent
            });
        }
    }
}
