// 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;
using System.Linq;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Sprites;
using osu.Game.Graphics.UserInterfaceV2;
using osu.Game.Rulesets.Osu.UI;
using osu.Game.Screens.Edit.Components.RadioButtons;
using osu.Game.Screens.Edit.Compose.Components;
using osuTK;

namespace osu.Game.Rulesets.Osu.Edit
{
    public partial class PreciseRotationPopover : OsuPopover
    {
        private readonly SelectionRotationHandler rotationHandler;

        private readonly OsuGridToolboxGroup gridToolbox;

        private readonly Bindable<PreciseRotationInfo> rotationInfo = new Bindable<PreciseRotationInfo>(new PreciseRotationInfo(0, RotationOrigin.GridCentre));

        private SliderWithTextBoxInput<float> angleInput = null!;
        private EditorRadioButtonCollection rotationOrigin = null!;

        private RadioButton selectionCentreButton = null!;

        public PreciseRotationPopover(SelectionRotationHandler rotationHandler, OsuGridToolboxGroup gridToolbox)
        {
            this.rotationHandler = rotationHandler;
            this.gridToolbox = gridToolbox;

            AllowableAnchors = new[] { Anchor.CentreLeft, Anchor.CentreRight };
        }

        [BackgroundDependencyLoader]
        private void load()
        {
            Child = new FillFlowContainer
            {
                Width = 220,
                AutoSizeAxes = Axes.Y,
                Spacing = new Vector2(20),
                Children = new Drawable[]
                {
                    angleInput = new SliderWithTextBoxInput<float>("Angle (degrees):")
                    {
                        Current = new BindableNumber<float>
                        {
                            MinValue = -360,
                            MaxValue = 360,
                            Precision = 1
                        },
                        Instantaneous = true
                    },
                    rotationOrigin = new EditorRadioButtonCollection
                    {
                        RelativeSizeAxes = Axes.X,
                        Items = new[]
                        {
                            new RadioButton("Grid centre",
                                () => rotationInfo.Value = rotationInfo.Value with { Origin = RotationOrigin.GridCentre },
                                () => new SpriteIcon { Icon = FontAwesome.Regular.PlusSquare }),
                            new RadioButton("Playfield centre",
                                () => rotationInfo.Value = rotationInfo.Value with { Origin = RotationOrigin.PlayfieldCentre },
                                () => new SpriteIcon { Icon = FontAwesome.Regular.Square }),
                            selectionCentreButton = new RadioButton("Selection centre",
                                () => rotationInfo.Value = rotationInfo.Value with { Origin = RotationOrigin.SelectionCentre },
                                () => new SpriteIcon { Icon = FontAwesome.Solid.VectorSquare })
                        }
                    }
                }
            };
            selectionCentreButton.Selected.DisabledChanged += isDisabled =>
            {
                selectionCentreButton.TooltipText = isDisabled ? "Select more than one object to perform selection-based rotation." : string.Empty;
            };
        }

        protected override void LoadComplete()
        {
            base.LoadComplete();

            ScheduleAfterChildren(() =>
            {
                angleInput.TakeFocus();
                angleInput.SelectAll();
            });
            angleInput.Current.BindValueChanged(angle => rotationInfo.Value = rotationInfo.Value with { Degrees = angle.NewValue });
            rotationOrigin.Items.First().Select();

            rotationHandler.CanRotateAroundSelectionOrigin.BindValueChanged(e =>
            {
                selectionCentreButton.Selected.Disabled = !e.NewValue;
            }, true);

            rotationInfo.BindValueChanged(rotation =>
            {
                rotationHandler.Update(rotation.NewValue.Degrees, getOriginPosition(rotation.NewValue));
            });
        }

        private Vector2? getOriginPosition(PreciseRotationInfo rotation) =>
            rotation.Origin switch
            {
                RotationOrigin.GridCentre => gridToolbox.StartPosition.Value,
                RotationOrigin.PlayfieldCentre => OsuPlayfield.BASE_SIZE / 2,
                RotationOrigin.SelectionCentre => null,
                _ => throw new ArgumentOutOfRangeException(nameof(rotation))
            };

        protected override void PopIn()
        {
            base.PopIn();
            rotationHandler.Begin();
        }

        protected override void PopOut()
        {
            base.PopOut();

            if (IsLoaded)
                rotationHandler.Commit();
        }
    }

    public enum RotationOrigin
    {
        GridCentre,
        PlayfieldCentre,
        SelectionCentre
    }

    public record PreciseRotationInfo(float Degrees, RotationOrigin Origin);
}