// 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.Shapes;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Input.Bindings;
using osu.Framework.Input.Events;
using osu.Game.Graphics.UserInterface;
using osu.Game.Input.Bindings;
using osu.Game.Rulesets.Edit;
using osu.Game.Rulesets.Osu.UI;
using osu.Game.Screens.Edit;
using osu.Game.Screens.Edit.Components.RadioButtons;

namespace osu.Game.Rulesets.Osu.Edit
{
    public partial class OsuGridToolboxGroup : EditorToolboxGroup, IKeyBindingHandler<GlobalAction>
    {
        private static readonly int[] grid_sizes = { 4, 8, 16, 32 };

        private int currentGridSizeIndex = grid_sizes.Length - 1;

        [Resolved]
        private EditorBeatmap editorBeatmap { get; set; } = null!;

        public BindableFloat StartPositionX { get; } = new BindableFloat(OsuPlayfield.BASE_SIZE.X / 2)
        {
            MinValue = 0f,
            MaxValue = OsuPlayfield.BASE_SIZE.X,
            Precision = 1f
        };

        public BindableFloat StartPositionY { get; } = new BindableFloat(OsuPlayfield.BASE_SIZE.Y / 2)
        {
            MinValue = 0f,
            MaxValue = OsuPlayfield.BASE_SIZE.Y,
            Precision = 1f
        };

        public BindableFloat Spacing { get; } = new BindableFloat(4f)
        {
            MinValue = 4f,
            MaxValue = 128f,
            Precision = 1f
        };

        public BindableFloat GridLinesRotation { get; } = new BindableFloat(0f)
        {
            MinValue = -45f,
            MaxValue = 45f,
            Precision = 1f
        };

        public Bindable<PositionSnapGridType> GridType { get; } = new Bindable<PositionSnapGridType>();

        private ExpandableSlider<float> startPositionXSlider = null!;
        private ExpandableSlider<float> startPositionYSlider = null!;
        private ExpandableSlider<float> spacingSlider = null!;
        private ExpandableSlider<float> gridLinesRotationSlider = null!;
        private EditorRadioButtonCollection gridTypeButtons = null!;

        public OsuGridToolboxGroup()
            : base("grid")
        {
        }

        [BackgroundDependencyLoader]
        private void load()
        {
            Children = new Drawable[]
            {
                startPositionXSlider = new ExpandableSlider<float>
                {
                    Current = StartPositionX
                },
                startPositionYSlider = new ExpandableSlider<float>
                {
                    Current = StartPositionY
                },
                spacingSlider = new ExpandableSlider<float>
                {
                    Current = Spacing
                },
                gridLinesRotationSlider = new ExpandableSlider<float>
                {
                    Current = GridLinesRotation
                },
                gridTypeButtons = new EditorRadioButtonCollection
                {
                    RelativeSizeAxes = Axes.X,
                    Items = new[]
                    {
                        new RadioButton("Square",
                            () => GridType.Value = PositionSnapGridType.Square,
                            () => new SpriteIcon { Icon = FontAwesome.Regular.Square }),
                        new RadioButton("Triangle",
                            () => GridType.Value = PositionSnapGridType.Triangle,
                            () => new Triangle()),
                        new RadioButton("Circle",
                            () => GridType.Value = PositionSnapGridType.Circle,
                            () => new SpriteIcon { Icon = FontAwesome.Regular.Circle }),
                    }
                },
            };

            int gridSizeIndex = Array.IndexOf(grid_sizes, editorBeatmap.BeatmapInfo.GridSize);
            if (gridSizeIndex >= 0)
                currentGridSizeIndex = gridSizeIndex;
            updateSpacing();
        }

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

            gridTypeButtons.Items.First().Select();

            StartPositionX.BindValueChanged(x =>
            {
                startPositionXSlider.ContractedLabelText = $"X: {x.NewValue:N0}";
                startPositionXSlider.ExpandedLabelText = $"X Offset: {x.NewValue:N0}";
            }, true);

            StartPositionY.BindValueChanged(y =>
            {
                startPositionYSlider.ContractedLabelText = $"Y: {y.NewValue:N0}";
                startPositionYSlider.ExpandedLabelText = $"Y Offset: {y.NewValue:N0}";
            }, true);

            Spacing.BindValueChanged(spacing =>
            {
                spacingSlider.ContractedLabelText = $"S: {spacing.NewValue:N0}";
                spacingSlider.ExpandedLabelText = $"Spacing: {spacing.NewValue:N0}";
            }, true);

            GridLinesRotation.BindValueChanged(rotation =>
            {
                gridLinesRotationSlider.ContractedLabelText = $"R: {rotation.NewValue:N0}";
                gridLinesRotationSlider.ExpandedLabelText = $"Rotation: {rotation.NewValue:N0}";
            }, true);
        }

        private void nextGridSize()
        {
            currentGridSizeIndex = (currentGridSizeIndex + 1) % grid_sizes.Length;
            updateSpacing();
        }

        private void updateSpacing()
        {
            int gridSize = grid_sizes[currentGridSizeIndex];

            editorBeatmap.BeatmapInfo.GridSize = gridSize;
            Spacing.Value = gridSize;
        }

        public bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
        {
            switch (e.Action)
            {
                case GlobalAction.EditorCycleGridDisplayMode:
                    nextGridSize();
                    return true;
            }

            return false;
        }

        public void OnReleased(KeyBindingReleaseEvent<GlobalAction> e)
        {
        }
    }

    public enum PositionSnapGridType
    {
        Square,
        Triangle,
        Circle,
    }
}