using System.Linq;
using System.Numerics;
using Content.Client.Roles;
using Content.Client.Stylesheets;
using Content.Client.UserInterface.Controls;
using Content.Shared.Implants;
using Content.Shared.StatusIcon;
using Robust.Client.AutoGenerated;
using Robust.Client.GameObjects;
using Robust.Client.UserInterface.Controls;
using Robust.Client.UserInterface.XAML;
using Robust.Shared.Prototypes;
using Robust.Shared.Timing;

namespace Content.Client.Implants.UI;

[GenerateTypedNameReferences]
public sealed partial class ChameleonControllerMenu : FancyWindow
{
    [Dependency] private readonly IPrototypeManager _prototypeManager = default!;
    [Dependency] private readonly IEntityManager _entityManager = default!;
    private readonly SpriteSystem _sprite;
    private readonly JobSystem _job;

    // List of all the job protos that you can select!
    private IEnumerable<ChameleonOutfitPrototype> _outfits;

    // Lock the UI until this time
    public DateTime? _lockedUntil;

    private static readonly ProtoId<JobIconPrototype> UnknownIcon = "JobIconUnknown";
    private static readonly LocId UnknownDepartment = "department-Unknown";

    public event Action<ProtoId<ChameleonOutfitPrototype>>? OnJobSelected;

    public ChameleonControllerMenu()
    {
        RobustXamlLoader.Load(this);
        IoCManager.InjectDependencies(this);
        _sprite = _entityManager.System<SpriteSystem>();
        _job = _entityManager.System<JobSystem>();

        _outfits = _prototypeManager.EnumeratePrototypes<ChameleonOutfitPrototype>();

        UpdateGrid();
    }

    /// <summary>
    ///     Fill the grid with the correct job icons and buttons.
    /// </summary>
    /// <param name="disabled">Set to true to disable all the buttons.</param>
    public void UpdateGrid(bool disabled = false)
    {
        Grid.RemoveAllChildren();

        // Dictionary to easily put outfits in departments.
        // Department name -> UI element holding that department.
        var departments = new Dictionary<string, BoxContainer>();

        departments.Add(UnknownDepartment, CreateDepartment(UnknownDepartment));

        // Go through every outfit and add them to the correct department.
        foreach (var outfit in _outfits)
        {
            _prototypeManager.TryIndex(outfit.Job, out var jobProto);

            var name = outfit.LoadoutName ?? outfit.Name ?? jobProto?.Name ?? "Prototype has no name or job.";

            var jobIconId = outfit.Icon ?? jobProto?.Icon ?? UnknownIcon;
            var jobIconProto = _prototypeManager.Index(jobIconId);

            var outfitButton = CreateOutfitButton(disabled, name, jobIconProto, outfit.ID);

            if (outfit.Job != null && _job.TryGetLowestWeightDepartment(outfit.Job, out var departmentPrototype))
            {
                if (!departments.ContainsKey(departmentPrototype.Name))
                    departments.Add(departmentPrototype.Name, CreateDepartment(departmentPrototype.Name));

                departments[departmentPrototype.Name].AddChild(outfitButton);
            }
            else
            {
                departments[UnknownDepartment].AddChild(outfitButton);
            }
        }

        // Sort the departments by their weight.
        var departmentList = departments.ToList();
        departmentList.Sort((a, b) => a.Value.ChildCount.CompareTo(b.Value.ChildCount));

        // Actually add the departments to the window.
        foreach (var department in departmentList)
        {
            Grid.AddChild(department.Value);
        }
    }

    private BoxContainer CreateDepartment(string name)
    {
        var departmentContainer = new BoxContainer
        {
            Orientation = BoxContainer.LayoutOrientation.Vertical,
        };
        departmentContainer.AddChild(new Label
        {
            Text = Loc.GetString(name),
        });

        return departmentContainer;
    }

    private BoxContainer CreateOutfitButton(bool disabled, string name, JobIconPrototype jobIconProto, ProtoId<ChameleonOutfitPrototype> outfitProto)
    {
        var outfitButton = new BoxContainer();

        var button = new Button
        {
            HorizontalExpand = true,
            StyleClasses = {StyleBase.ButtonSquare},
            ToolTip = Loc.GetString(name),
            Text = Loc.GetString(name),
            Margin = new Thickness(0, 0, 15, 0),
            Disabled = disabled,
        };

        var jobIconTexture = new TextureRect
        {
            Texture = _sprite.Frame0(jobIconProto.Icon),
            TextureScale = new Vector2(2.5f, 2.5f),
            Stretch = TextureRect.StretchMode.KeepCentered,
            Margin = new Thickness(0, 0, 5, 0),
        };

        outfitButton.AddChild(jobIconTexture);
        outfitButton.AddChild(button);

        button.OnPressed += _ => JobButtonPressed(outfitProto);

        return outfitButton;
    }

    private void JobButtonPressed(ProtoId<ChameleonOutfitPrototype> outfit)
    {
        OnJobSelected?.Invoke(outfit);
    }

    protected override void FrameUpdate(FrameEventArgs args)
    {
        base.FrameUpdate(args);

        if (_lockedUntil == null || DateTime.Now < _lockedUntil)
            return;

        _lockedUntil = null;
        UpdateGrid();
    }
}