// 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.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Graphics.UserInterface;
using osu.Game.Configuration;
using osu.Game.Graphics;
using osu.Game.Overlays.Settings;

namespace osu.Game.Rulesets.Mods
{
    public abstract class ModRandom : Mod
    {
        public override string Name => "Random";
        public override string Acronym => "RD";
        public override ModType Type => ModType.Conversion;
        public override IconUsage? Icon => OsuIcon.Dice;
        public override double ScoreMultiplier => 1;

        [SettingSource("Seed", "Use a custom seed instead of a random one", SettingControlType = typeof(ModRandomSettingsControl))]
        public Bindable<int?> Seed { get; } = new Bindable<int?>
        {
            Default = null,
            Value = null
        };

        private class ModRandomSettingsControl : SettingsItem<int?>
        {
            protected override Drawable CreateControl() => new SeedControl
            {
                RelativeSizeAxes = Axes.X,
                Margin = new MarginPadding { Top = 5 }
            };

            private sealed class SeedControl : CompositeDrawable, IHasCurrentValue<int?>
            {
                private readonly BindableWithCurrent<int?> current = new BindableWithCurrent<int?>();

                public Bindable<int?> Current
                {
                    get => current;
                    set
                    {
                        current.Current = value;
                        seedNumberBox.Text = value.Value.ToString();
                    }
                }

                private readonly SettingsTextBox.OsuSettingsNumberBox seedNumberBox;

                public SeedControl()
                {
                    AutoSizeAxes = Axes.Y;

                    InternalChildren = new[]
                    {
                        new GridContainer
                        {
                            RelativeSizeAxes = Axes.X,
                            AutoSizeAxes = Axes.Y,
                            ColumnDimensions = new[]
                            {
                                new Dimension(),
                                new Dimension(GridSizeMode.Absolute, 2),
                                new Dimension(GridSizeMode.Relative, 0.25f)
                            },
                            RowDimensions = new[]
                            {
                                new Dimension(GridSizeMode.AutoSize)
                            },
                            Content = new[]
                            {
                                new Drawable[]
                                {
                                    seedNumberBox = new SettingsTextBox.OsuSettingsNumberBox
                                    {
                                        RelativeSizeAxes = Axes.X,
                                        CommitOnFocusLost = true
                                    }
                                }
                            }
                        }
                    };

                    seedNumberBox.Current.BindValueChanged(e =>
                    {
                        int? value = null;

                        if (int.TryParse(e.NewValue, out var intVal))
                            value = intVal;

                        current.Value = value;
                    });
                }

                protected override void Update()
                {
                    if (current.Value == null)
                        seedNumberBox.Text = current.Current.Value.ToString();
                }
            }
        }
    }
}