using T3.Core.Rendering.Material;
using T3.Core.Utils;

namespace Lib.render.scene;

[Guid("2fcdea21-18f1-4006-a2fe-aab40893fed8")]
public class DrawScene : Instance<DrawScene>
                        ,ICustomDropdownHolder, ICompoundWithUpdate
{
    [Output(Guid = "3b00e1d6-f966-4b03-81fc-2291e0fa7dbf")]
    public readonly Slot<Command> Output = new();
        
        
    public DrawScene()
    {
        Output.UpdateAction += Update;
    }
        
    // private void Update(EvaluationContext context)
    // {
    //     _pbrMaterials = context.Materials;
    // }
        
    private void Update(EvaluationContext context)
    {
        if (context.Materials != null)
        {
            _pbrMaterials.Clear();
            _pbrMaterials.AddRange(context.Materials);
        }

        var previousMaterial = context.PbrMaterial;
            
        var materialId = UseMaterialId.GetValue(context);
        if (!string.IsNullOrEmpty(materialId))
        {
            foreach(var m in context.Materials)
            {
                if (m.Name != materialId)
                    continue;
                    
                context.PbrMaterial = m;
                break;

            }
        }
            
        // Inner update
        Output.ConnectedUpdate(context);
        context.PbrMaterial = previousMaterial;
    }        
        
        
    #region custom material dropdown
    string ICustomDropdownHolder.GetValueForInput(Guid inputId)
    {
        if (inputId != UseMaterialId.Input.Id)
            return "Undefined input";

        return "Default";
    }

    IEnumerable<string> ICustomDropdownHolder.GetOptionsForInput(Guid inputId)
    {
        yield return "Default";
            
        if(_pbrMaterials == null)
            yield break;

        foreach (var m in _pbrMaterials)
        {
            yield return string.IsNullOrEmpty(m.Name) ? "undefined" : m.Name;
        }
    }

    void ICustomDropdownHolder.HandleResultForInput(Guid inputId, string selected, bool isAListItem)
    {
        if (inputId != UseMaterialId.Input.Id)
            return;
            
        UseMaterialId.SetTypedInputValue(selected);
    }

    private readonly List<PbrMaterial> _pbrMaterials = new();
        
    #endregion
    
    private enum ShadingModes
    {
        Default = 0,
        Flat = 1,
    }

        [Input(Guid = "22ad6256-f741-4e8f-9a47-4b5b82e2cecf")]
        public readonly InputSlot<T3.Core.DataTypes.SceneSetup> Scene = new InputSlot<T3.Core.DataTypes.SceneSetup>();

        [Input(Guid = "dd74d2b9-8c91-4a2a-adca-5ca187d433a3")]
        public readonly InputSlot<System.Numerics.Vector4> Color = new InputSlot<System.Numerics.Vector4>();

        [Input(Guid = "5F63B525-5DA3-44A3-8875-11A82C37B0A5")]
        public readonly InputSlot<bool> UseSceneMaterials = new InputSlot<bool>();

        [Input(Guid = "07089671-d27e-4eec-9719-8f6db7479b0b")]
        public readonly InputSlot<string> UseMaterialId = new InputSlot<string>();

        [Input(Guid = "69151dfb-59cf-4618-8642-c9dc88260786", MappedType = typeof(SharedEnums.BlendModes))]
        public readonly InputSlot<int> BlendMode = new InputSlot<int>();

        [Input(Guid = "49e57c71-cbd3-4f8a-9a96-8fb116c947b0", MappedType = typeof(FillMode))]
        public readonly InputSlot<int> FillMode = new InputSlot<int>();

        [Input(Guid = "42e7cc49-5102-4e74-8bea-c7698cb4abca")]
        public readonly InputSlot<SharpDX.Direct3D11.CullMode> Culling = new InputSlot<SharpDX.Direct3D11.CullMode>();

        [Input(Guid = "f01f64e6-0344-48cb-8fc5-8b9c12f0b123", MappedType = typeof(ShadingModes))]
        public readonly InputSlot<int> Shading = new InputSlot<int>();

        [Input(Guid = "2fc29a7b-84ca-4780-8305-ff08da69d405")]
        public readonly InputSlot<float> SpecularAA = new InputSlot<float>();

        [Input(Guid = "121f0f29-36f3-4ef7-9ebf-d14ad65b16a2")]
        public readonly InputSlot<bool> EnableZTest = new InputSlot<bool>();

        [Input(Guid = "d517b62c-0f11-4d76-a945-4dabb7d84d74")]
        public readonly InputSlot<bool> EnableZWrite = new InputSlot<bool>();

        [Input(Guid = "35d67171-b2e3-45af-9adc-5c6539319ce9")]
        public readonly InputSlot<float> AlphaCutOff = new InputSlot<float>();

        [Input(Guid = "a5ba01f8-5176-4f2f-aac3-ba7d8ede4c20")]
        public readonly InputSlot<SharpDX.Direct3D11.Filter> Filter = new InputSlot<SharpDX.Direct3D11.Filter>();

        [Input(Guid = "b17800d2-cdf3-4334-90a0-d10b8cc27445")]
        public readonly InputSlot<SharpDX.Direct3D11.TextureAddressMode> WrapMode = new InputSlot<SharpDX.Direct3D11.TextureAddressMode>();
}