#include "XCEngine/RHI/D3D12/D3D12Device.h"
#include "XCEngine/RHI/D3D12/D3D12CommandQueue.h"
#include "XCEngine/RHI/D3D12/D3D12CommandList.h"
#include "XCEngine/RHI/D3D12/D3D12CommandAllocator.h"
#include "XCEngine/RHI/D3D12/D3D12Fence.h"
#include "XCEngine/RHI/D3D12/D3D12DescriptorHeap.h"
#include "XCEngine/RHI/D3D12/D3D12DescriptorSet.h"
#include "XCEngine/RHI/D3D12/D3D12QueryHeap.h"
#include "XCEngine/RHI/D3D12/D3D12RootSignature.h"
#include "XCEngine/RHI/D3D12/D3D12PipelineLayout.h"
#include "XCEngine/RHI/D3D12/D3D12PipelineState.h"
#include "XCEngine/RHI/D3D12/D3D12Sampler.h"
#include "XCEngine/RHI/D3D12/D3D12Texture.h"
#include "XCEngine/RHI/D3D12/D3D12Buffer.h"
#include "XCEngine/RHI/D3D12/D3D12SwapChain.h"
#include "XCEngine/RHI/D3D12/D3D12Shader.h"
#include "XCEngine/RHI/D3D12/D3D12ResourceView.h"
#include "XCEngine/RHI/D3D12/D3D12RenderPass.h"
#include "XCEngine/RHI/D3D12/D3D12Framebuffer.h"
#include <stdio.h>
#include <memory>
#include <string>

#ifdef _DEBUG
#include <dxgidebug.h>
#endif

namespace XCEngine {
namespace RHI {

namespace {

std::string NarrowAscii(const std::wstring& value) {
    std::string result;
    result.reserve(value.size());
    for (wchar_t ch : value) {
        result.push_back(static_cast<char>(ch));
    }
    return result;
}

bool HasShaderPayload(const ShaderCompileDesc& desc) {
    return !desc.source.empty() || !desc.fileName.empty();
}

bool CompileD3D12Shader(const ShaderCompileDesc& desc, D3D12Shader& shader) {
    const std::string entryPoint = NarrowAscii(desc.entryPoint);
    const std::string profile = NarrowAscii(desc.profile);
    const char* entryPointPtr = entryPoint.empty() ? nullptr : entryPoint.c_str();
    const char* profilePtr = profile.empty() ? nullptr : profile.c_str();

    if (!desc.source.empty()) {
        return shader.Compile(desc.source.data(), desc.source.size(), entryPointPtr, profilePtr);
    }

    if (!desc.fileName.empty()) {
        return shader.CompileFromFile(desc.fileName.c_str(), entryPointPtr, profilePtr);
    }

    return false;
}

uint32_t GetFormatBytesPerPixel(Format format) {
    switch (format) {
        case Format::R8_UNorm:
            return 1;
        case Format::R8G8_UNorm:
            return 2;
        case Format::R8G8B8A8_UNorm:
            return 4;
        case Format::R16_Float:
            return 2;
        case Format::R16G16B16A16_Float:
            return 8;
        case Format::R32_Float:
            return 4;
        case Format::R32G32_Float:
            return 8;
        case Format::R32G32B32A32_Float:
            return 16;
        default:
            return 0;
    }
}

} // namespace

D3D12Device::D3D12Device()
    : m_isDeviceRemoved(false)
    , m_initialized(false)
{
}

D3D12Device::~D3D12Device() {
    Shutdown();
}

bool D3D12Device::Initialize(const RHIDeviceDesc& desc) {
    if (m_initialized) {
        return true;
    }

    m_deviceDesc = desc;

    if (!CreateDXGIFactory(desc.enableDebugLayer)) {
        return false;
    }

    ComPtr<IDXGIAdapter1> adapter;
    int adapterIndex = desc.adapterIndex;
    bool adapterFound = false;

    while (m_factory->EnumAdapters1(adapterIndex, &adapter) != DXGI_ERROR_NOT_FOUND) {
        DXGI_ADAPTER_DESC1 descAdapter;
        adapter->GetDesc1(&descAdapter);

        if (descAdapter.Flags & DXGI_ADAPTER_FLAG_SOFTWARE) {
            adapterIndex++;
            continue;
        }

        HRESULT hr = D3D12CreateDevice(adapter.Get(), D3D_FEATURE_LEVEL_11_0, __uuidof(ID3D12Device), nullptr);
        if (SUCCEEDED(hr)) {
            adapterFound = true;
            m_adapter = adapter;
            break;
        }
        adapterIndex++;
    }

    if (!adapterFound) {
        return false;
    }

    if (!CreateDevice(m_adapter.Get())) {
        return false;
    }

    QueryAdapterInfo();
    m_initialized = true;
    return true;
}

void D3D12Device::Shutdown() {
    if (m_device) {
        m_device.Reset();
    }
    if (m_factory) {
        m_factory.Reset();
    }
    m_adapter.Reset();
    m_initialized = false;
}

bool D3D12Device::CreateDXGIFactory(bool enableDebugLayer) {
    UINT dxgiFactoryFlags = 0;

    if (enableDebugLayer) {
        ID3D12Debug* debugController = nullptr;
        if (SUCCEEDED(D3D12GetDebugInterface(IID_PPV_ARGS(&debugController)))) {
            debugController->EnableDebugLayer();
            dxgiFactoryFlags |= DXGI_CREATE_FACTORY_DEBUG;
            debugController->Release();
        }
    }

    HRESULT hr = CreateDXGIFactory2(dxgiFactoryFlags, IID_PPV_ARGS(&m_factory));
    return SUCCEEDED(hr);
}

bool D3D12Device::CreateDevice(IDXGIAdapter1* adapter) {
    OutputDebugStringA("[DEBUG] CreateDevice: start\n");
    HRESULT hr = D3D12CreateDevice(adapter, D3D_FEATURE_LEVEL_11_0, IID_PPV_ARGS(&m_device));
    if (FAILED(hr)) {
        char buf[256];
        sprintf(buf, "[DEBUG] CreateDevice: D3D12CreateDevice failed! hr=%08X\n", hr);
        OutputDebugStringA(buf);
    }
    return SUCCEEDED(hr);
}

void D3D12Device::QueryAdapterInfo() {
    if (!m_adapter) {
        return;
    }

    DXGI_ADAPTER_DESC1 desc;
    m_adapter->GetDesc1(&desc);

    m_adapterInfo.vendorId = desc.VendorId;
    m_adapterInfo.deviceId = desc.DeviceId;
    m_adapterInfo.dedicatedVideoMemory = desc.DedicatedVideoMemory;
    m_adapterInfo.dedicatedSystemMemory = desc.DedicatedSystemMemory;
    m_adapterInfo.sharedSystemMemory = desc.SharedSystemMemory;
    m_adapterInfo.description = desc.Description;
    m_adapterInfo.isSoftware = (desc.Flags & DXGI_ADAPTER_FLAG_SOFTWARE) != 0;

    m_deviceInfo.description = desc.Description;
    m_deviceInfo.vendorId = desc.VendorId;
    m_deviceInfo.deviceId = desc.DeviceId;
    m_deviceInfo.dedicatedVideoMemory = desc.DedicatedVideoMemory;
    m_deviceInfo.dedicatedSystemMemory = desc.DedicatedSystemMemory;
    m_deviceInfo.sharedSystemMemory = desc.SharedSystemMemory;
    m_deviceInfo.isSoftware = (desc.Flags & DXGI_ADAPTER_FLAG_SOFTWARE) != 0;
    
    switch (desc.VendorId) {
        case 0x10DE: m_deviceInfo.vendor = L"NVIDIA"; break;
        case 0x1002: m_deviceInfo.vendor = L"AMD"; break;
        case 0x8086: m_deviceInfo.vendor = L"Intel"; break;
        default: m_deviceInfo.vendor = L"Unknown"; break;
    }
    m_deviceInfo.renderer = desc.Description;

    D3D12_FEATURE_DATA_D3D12_OPTIONS5 options5 = {};
    if (SUCCEEDED(m_device->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS5, &options5, sizeof(options5)))) {
        m_capabilities.bSupportsRayTracing = options5.RaytracingTier != D3D12_RAYTRACING_TIER_NOT_SUPPORTED;
    }

    D3D12_FEATURE_DATA_D3D12_OPTIONS7 options7 = {};
    if (SUCCEEDED(m_device->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS7, &options7, sizeof(options7)))) {
        m_capabilities.bSupportsMeshShaders = options7.MeshShaderTier != D3D12_MESH_SHADER_TIER_NOT_SUPPORTED;
    }

    D3D12_FEATURE_DATA_D3D12_OPTIONS options = {};
    if (SUCCEEDED(m_device->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS, &options, sizeof(options)))) {
        m_capabilities.bSupportsConservativeRasterization = options.ConservativeRasterizationTier != D3D12_CONSERVATIVE_RASTERIZATION_TIER_NOT_SUPPORTED;
    }

    D3D12_FEATURE_DATA_D3D12_OPTIONS3 options3 = {};
    if (SUCCEEDED(m_device->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS3, &options3, sizeof(options3)))) {
    }

    D3D12_FEATURE_DATA_D3D12_OPTIONS4 options4 = {};
    if (SUCCEEDED(m_device->CheckFeatureSupport(D3D12_FEATURE_D3D12_OPTIONS4, &options4, sizeof(options4)))) {
    }

    m_capabilities.maxRenderTargets = 8;
    m_capabilities.maxViewports = 16;
    m_capabilities.maxVertexAttribs = 8;
    m_capabilities.maxColorAttachments = 8;
    m_capabilities.maxConstantBufferSize = D3D12_REQ_CONSTANT_BUFFER_ELEMENT_COUNT * 16;
    m_capabilities.maxAnisotropy = D3D12_MAX_MAXANISOTROPY;
    m_capabilities.maxTexture2DSize = D3D12_REQ_TEXTURE2D_U_OR_V_DIMENSION;
    m_capabilities.maxTexture3DSize = D3D12_REQ_TEXTURE3D_U_V_OR_W_DIMENSION;
    m_capabilities.maxTextureCubeSize = D3D12_REQ_TEXTURECUBE_DIMENSION;
}

bool D3D12Device::CheckFeatureSupport(D3D12_FEATURE feature, void* featureSupportData, uint32_t featureSupportDataSize) {
    return SUCCEEDED(m_device->CheckFeatureSupport(feature, featureSupportData, featureSupportDataSize));
}

std::vector<AdapterInfo> D3D12Device::EnumerateAdapters() {
    std::vector<AdapterInfo> adapters;

    if (!m_factory) {
        return adapters;
    }

    ComPtr<IDXGIAdapter1> adapter;
    int adapterIndex = 0;

    while (m_factory->EnumAdapters1(adapterIndex, &adapter) != DXGI_ERROR_NOT_FOUND) {
        DXGI_ADAPTER_DESC1 desc;
        adapter->GetDesc1(&desc);

        AdapterInfo info;
        info.description = desc.Description;
        info.dedicatedVideoMemory = desc.DedicatedVideoMemory;
        info.dedicatedSystemMemory = desc.DedicatedSystemMemory;
        info.sharedSystemMemory = desc.SharedSystemMemory;
        info.vendorId = desc.VendorId;
        info.deviceId = desc.DeviceId;
        info.isSoftware = (desc.Flags & DXGI_ADAPTER_FLAG_SOFTWARE) != 0;

        adapters.push_back(info);
        adapterIndex++;
    }

    return adapters;
}

UINT D3D12Device::GetDescriptorHandleIncrementSize(DescriptorHeapType type) const {
    return m_device->GetDescriptorHandleIncrementSize(ToD3D12(type));
}

void* D3D12Device::GetNativeHandle() const {
    return m_device.Get();
}

void* D3D12Device::GetNativeDevice() {
    return m_device.Get();
}

const RHICapabilities& D3D12Device::GetCapabilities() const {
    return m_capabilities;
}

const RHIDeviceInfo& D3D12Device::GetDeviceInfo() const {
    return m_deviceInfo;
}

RHIBuffer* D3D12Device::CreateBuffer(const BufferDesc& desc) {
    auto* buffer = new D3D12Buffer();
    D3D12_HEAP_TYPE heapType = D3D12_HEAP_TYPE_DEFAULT;
    if (desc.bufferType == static_cast<uint32_t>(BufferType::ReadBack)) {
        heapType = D3D12_HEAP_TYPE_READBACK;
    } else if (desc.bufferType == static_cast<uint32_t>(BufferType::Constant) ||
               desc.bufferType == static_cast<uint32_t>(BufferType::Vertex) ||
               desc.bufferType == static_cast<uint32_t>(BufferType::Index)) {
        heapType = D3D12_HEAP_TYPE_UPLOAD;
    }
    if (buffer->Initialize(m_device.Get(), desc.size, D3D12_RESOURCE_STATE_COMMON, heapType)) {
        buffer->SetStride(desc.stride);
        buffer->SetBufferType(static_cast<BufferType>(desc.bufferType));
        return buffer;
    }
    delete buffer;
    return nullptr;
}

RHITexture* D3D12Device::CreateTexture(const TextureDesc& desc) {
    auto* texture = new D3D12Texture();
    D3D12_RESOURCE_DESC d3d12Desc = {};
    
    d3d12Desc.Dimension = ToD3D12(static_cast<TextureType>(desc.textureType));
    
    d3d12Desc.Width = desc.width;
    d3d12Desc.Height = desc.height;
    d3d12Desc.DepthOrArraySize = desc.depth > 0 ? desc.depth : 1;
    d3d12Desc.MipLevels = desc.mipLevels > 0 ? desc.mipLevels : 1;
    d3d12Desc.Format = ToD3D12(static_cast<Format>(desc.format));
    d3d12Desc.SampleDesc.Count = desc.sampleCount > 0 ? desc.sampleCount : 1;
    d3d12Desc.SampleDesc.Quality = desc.sampleQuality;
    d3d12Desc.Flags = static_cast<D3D12_RESOURCE_FLAGS>(desc.flags);
    
    Format format = static_cast<Format>(desc.format);
    if (format == Format::D24_UNorm_S8_UInt || format == Format::D32_Float ||
        format == Format::D16_UNorm) {
        d3d12Desc.Flags |= D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL;
    } else if (d3d12Desc.Dimension == D3D12_RESOURCE_DIMENSION_TEXTURE2D && desc.width > 0 && desc.height > 0) {
        d3d12Desc.Flags |= D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET;
    }
    
    d3d12Desc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN;
    const bool isDepthFormat = format == Format::D24_UNorm_S8_UInt ||
                               format == Format::D32_Float ||
                               format == Format::D16_UNorm;
    const D3D12_RESOURCE_STATES initialState =
        isDepthFormat ? D3D12_RESOURCE_STATE_DEPTH_WRITE : D3D12_RESOURCE_STATE_COMMON;
    if (texture->Initialize(m_device.Get(), d3d12Desc, initialState)) {
        if (isDepthFormat) {
            texture->SetState(ResourceStates::DepthWrite);
        }
        return texture;
    }
    delete texture;
    return nullptr;
}

RHITexture* D3D12Device::CreateTexture(const TextureDesc& desc, const void* initialData, size_t initialDataSize, uint32_t rowPitch) {
    (void)initialDataSize;

    if (initialData == nullptr) {
        return CreateTexture(desc);
    }

    if (desc.textureType != static_cast<uint32_t>(TextureType::Texture2D)) {
        return nullptr;
    }

    const Format format = static_cast<Format>(desc.format);
    uint32_t resolvedRowPitch = rowPitch;
    if (resolvedRowPitch == 0) {
        const uint32_t bytesPerPixel = GetFormatBytesPerPixel(format);
        if (bytesPerPixel == 0) {
            return nullptr;
        }
        resolvedRowPitch = desc.width * bytesPerPixel;
    }

    D3D12CommandQueue uploadQueue;
    if (!uploadQueue.Initialize(m_device.Get(), CommandQueueType::Direct)) {
        return nullptr;
    }

    D3D12CommandAllocator uploadAllocator;
    if (!uploadAllocator.Initialize(m_device.Get(), CommandQueueType::Direct)) {
        uploadQueue.Shutdown();
        return nullptr;
    }

    D3D12CommandList uploadCommandList;
    if (!uploadCommandList.Initialize(m_device.Get(), CommandQueueType::Direct, uploadAllocator.GetCommandAllocator())) {
        uploadAllocator.Shutdown();
        uploadQueue.Shutdown();
        return nullptr;
    }

    uploadAllocator.Reset();
    uploadCommandList.Reset();

    auto* texture = new D3D12Texture();
    ComPtr<ID3D12Resource> uploadBuffer;
    if (!texture->InitializeFromData(
            m_device.Get(),
            uploadCommandList.GetCommandList(),
            initialData,
            desc.width,
            desc.height,
            ToD3D12(format),
            resolvedRowPitch,
            &uploadBuffer)) {
        delete texture;
        uploadCommandList.Shutdown();
        uploadAllocator.Shutdown();
        uploadQueue.Shutdown();
        return nullptr;
    }

    texture->SetState(ResourceStates::PixelShaderResource);

    uploadCommandList.Close();
    ID3D12CommandList* commandLists[] = { uploadCommandList.GetCommandList() };
    uploadQueue.ExecuteCommandListsInternal(1, commandLists);
    uploadQueue.WaitForIdle();
    uploadBuffer.Reset();

    uploadCommandList.Shutdown();
    uploadAllocator.Shutdown();
    uploadQueue.Shutdown();
    return texture;
}

RHIShader* D3D12Device::CreateShader(const ShaderCompileDesc& desc) {
    auto* shader = new D3D12Shader();
    const std::string entryPoint = NarrowAscii(desc.entryPoint);
    const std::string profile = NarrowAscii(desc.profile);
    const char* entryPointPtr = entryPoint.empty() ? nullptr : entryPoint.c_str();
    const char* profilePtr = profile.empty() ? nullptr : profile.c_str();
    
    bool success = false;
    if (!desc.source.empty()) {
        success = shader->Compile(desc.source.data(), desc.source.size(), entryPointPtr, profilePtr);
    } else if (!desc.fileName.empty()) {
        success = shader->CompileFromFile(desc.fileName.c_str(), entryPointPtr, profilePtr);
    }
    
    if (success) {
        return shader;
    }
    delete shader;
    return nullptr;
}

RHISampler* D3D12Device::CreateSampler(const SamplerDesc& desc) {
    auto* sampler = new D3D12Sampler();
    D3D12_SAMPLER_DESC d3d12Desc = {};
    d3d12Desc.Filter = ToD3D12(static_cast<FilterMode>(desc.filter));
    d3d12Desc.AddressU = ToD3D12(static_cast<TextureAddressMode>(desc.addressU));
    d3d12Desc.AddressV = ToD3D12(static_cast<TextureAddressMode>(desc.addressV));
    d3d12Desc.AddressW = ToD3D12(static_cast<TextureAddressMode>(desc.addressW));
    d3d12Desc.MipLODBias = desc.mipLodBias;
    d3d12Desc.MaxAnisotropy = desc.maxAnisotropy;
    d3d12Desc.ComparisonFunc = ToD3D12(static_cast<ComparisonFunc>(desc.comparisonFunc));
    d3d12Desc.BorderColor[0] = desc.borderColorR;
    d3d12Desc.BorderColor[1] = desc.borderColorG;
    d3d12Desc.BorderColor[2] = desc.borderColorB;
    d3d12Desc.BorderColor[3] = desc.borderColorA;
    d3d12Desc.MinLOD = desc.minLod;
    d3d12Desc.MaxLOD = desc.maxLod;
    if (sampler->Initialize(m_device.Get(), d3d12Desc)) {
        return sampler;
    }
    delete sampler;
    return nullptr;
}

RHIDescriptorPool* D3D12Device::CreateDescriptorPool(const DescriptorPoolDesc& desc) {
    auto* pool = new D3D12DescriptorHeap();
    DescriptorPoolDesc poolDesc = desc;
    poolDesc.device = m_device.Get();
    if (pool->Initialize(poolDesc)) {
        return pool;
    }
    delete pool;
    return nullptr;
}

RHIRenderPass* D3D12Device::CreateRenderPass(
    uint32_t colorAttachmentCount,
    const AttachmentDesc* colorAttachments,
    const AttachmentDesc* depthStencilAttachment) {
    auto* renderPass = new D3D12RenderPass();
    if (!renderPass->Initialize(colorAttachmentCount, colorAttachments, depthStencilAttachment)) {
        delete renderPass;
        return nullptr;
    }
    return renderPass;
}

RHIFramebuffer* D3D12Device::CreateFramebuffer(
    class RHIRenderPass* renderPass,
    uint32_t width, uint32_t height,
    uint32_t colorAttachmentCount,
    RHIResourceView** colorAttachments,
    RHIResourceView* depthStencilAttachment) {
    auto* framebuffer = new D3D12Framebuffer();
    if (!framebuffer->Initialize(renderPass, width, height, colorAttachmentCount, colorAttachments, depthStencilAttachment)) {
        delete framebuffer;
        return nullptr;
    }
    return framebuffer;
}

RHIDescriptorSet* D3D12Device::CreateDescriptorSet(RHIDescriptorPool* pool, const DescriptorSetLayoutDesc& layout) {
    if (pool == nullptr) {
        return nullptr;
    }
    return pool->AllocateSet(layout);
}

RHIFence* D3D12Device::CreateFence(const FenceDesc& desc) {
    auto* fence = new D3D12Fence();
    if (fence->Initialize(m_device.Get(), desc.initialValue)) {
        return fence;
    }
    delete fence;
    return nullptr;
}

RHIResourceView* D3D12Device::CreateVertexBufferView(RHIBuffer* buffer, const ResourceViewDesc& desc) {
    if (!buffer) {
        return nullptr;
    }

    auto* view = new D3D12ResourceView();
    view->InitializeAsVertexBuffer(static_cast<D3D12Buffer*>(buffer), desc);
    if (!view->IsValid()) {
        delete view;
        return nullptr;
    }

    return view;
}

RHIResourceView* D3D12Device::CreateIndexBufferView(RHIBuffer* buffer, const ResourceViewDesc& desc) {
    if (!buffer) {
        return nullptr;
    }

    auto* view = new D3D12ResourceView();
    view->InitializeAsIndexBuffer(static_cast<D3D12Buffer*>(buffer), desc);
    if (!view->IsValid()) {
        delete view;
        return nullptr;
    }

    return view;
}

RHISwapChain* D3D12Device::CreateSwapChain(const SwapChainDesc& desc, RHICommandQueue* presentQueue) {
    if (presentQueue == nullptr) {
        return nullptr;
    }

    auto* nativeQueue = static_cast<ID3D12CommandQueue*>(presentQueue->GetNativeHandle());
    if (nativeQueue == nullptr) {
        return nullptr;
    }

    auto* swapChain = new D3D12SwapChain();
    HWND hwnd = static_cast<HWND>(desc.windowHandle);
    if (swapChain->Initialize(m_factory.Get(), nativeQueue, hwnd,
                              desc.width, desc.height, desc.bufferCount)) {
        return swapChain;
    }
    delete swapChain;
    return nullptr;
}

RHICommandList* D3D12Device::CreateCommandList(const CommandListDesc& desc) {
    if (!m_device) {
        return nullptr;
    }
    
    auto allocator = std::make_unique<D3D12CommandAllocator>();
    if (!allocator->Initialize(m_device.Get(), static_cast<CommandQueueType>(desc.commandListType))) {
        return nullptr;
    }
    
    auto* cmdList = new D3D12CommandList();
    if (!cmdList->Initialize(m_device.Get(), static_cast<CommandQueueType>(desc.commandListType), allocator->GetCommandAllocator())) {
        delete cmdList;
        return nullptr;
    }
    
    return cmdList;
}

RHICommandQueue* D3D12Device::CreateCommandQueue(const CommandQueueDesc& desc) {
    auto* queue = new D3D12CommandQueue();
    if (queue->Initialize(m_device.Get(), static_cast<CommandQueueType>(desc.queueType))) {
        return queue;
    }
    delete queue;
    return nullptr;
}

RHIPipelineState* D3D12Device::CreatePipelineState(const GraphicsPipelineDesc& desc) {
    auto* pso = new D3D12PipelineState(m_device.Get());
    pso->SetInputLayout(desc.inputLayout);
    pso->SetRasterizerState(desc.rasterizerState);
    pso->SetBlendState(desc.blendState);
    pso->SetDepthStencilState(desc.depthStencilState);
    pso->SetTopology(desc.topologyType);
    pso->SetRenderTargetFormats(desc.renderTargetCount, desc.renderTargetFormats, desc.depthStencilFormat);
    pso->SetSampleCount(desc.sampleCount);

    const bool hasVertexShader = HasShaderPayload(desc.vertexShader);
    const bool hasFragmentShader = HasShaderPayload(desc.fragmentShader);
    const bool hasGeometryShader = HasShaderPayload(desc.geometryShader);
    if (!hasVertexShader && !hasFragmentShader && !hasGeometryShader) {
        return pso;
    }

    if (!hasVertexShader || !hasFragmentShader) {
        delete pso;
        return nullptr;
    }

    D3D12RootSignature* rootSignature = nullptr;
    if (desc.pipelineLayout != nullptr) {
        auto* pipelineLayout = static_cast<D3D12PipelineLayout*>(desc.pipelineLayout);
        pso->SetRootSignature(pipelineLayout->GetRootSignature());
    } else {
        rootSignature = CreateRootSignature({});
        if (rootSignature == nullptr) {
            delete pso;
            return nullptr;
        }
        pso->SetRootSignature(rootSignature->GetRootSignature());
    }

    D3D12Shader vertexShader;
    D3D12Shader fragmentShader;
    D3D12Shader geometryShader;
    const bool vertexCompiled = CompileD3D12Shader(desc.vertexShader, vertexShader);
    const bool fragmentCompiled = CompileD3D12Shader(desc.fragmentShader, fragmentShader);
    const bool geometryCompiled = !hasGeometryShader || CompileD3D12Shader(desc.geometryShader, geometryShader);

    if (!vertexCompiled || !fragmentCompiled || !geometryCompiled) {
        if (rootSignature != nullptr) {
            rootSignature->Shutdown();
            delete rootSignature;
        }
        delete pso;
        return nullptr;
    }

    pso->SetShaderBytecodes(
        vertexShader.GetD3D12Bytecode(),
        fragmentShader.GetD3D12Bytecode(),
        hasGeometryShader ? geometryShader.GetD3D12Bytecode() : D3D12_SHADER_BYTECODE{});
    pso->EnsureValid();

    if (rootSignature != nullptr) {
        rootSignature->Shutdown();
        delete rootSignature;
    }

    if (!pso->IsValid()) {
        delete pso;
        return nullptr;
    }

    return pso;
}

RHIPipelineLayout* D3D12Device::CreatePipelineLayout(const RHIPipelineLayoutDesc& desc) {
    auto* pipelineLayout = new D3D12PipelineLayout();
    if (!pipelineLayout->InitializeWithDevice(this, desc)) {
        delete pipelineLayout;
        return nullptr;
    }
    return pipelineLayout;
}

RHIResourceView* D3D12Device::CreateRenderTargetView(RHITexture* texture, const ResourceViewDesc& desc) {
    if (!texture) {
        return nullptr;
    }
    
    auto* view = new D3D12ResourceView();
    auto* d3d12Texture = static_cast<D3D12Texture*>(texture);
    ID3D12Resource* resource = d3d12Texture->GetResource();
    
    if (!resource) {
        delete view;
        return nullptr;
    }

    D3D12_RENDER_TARGET_VIEW_DESC rtvDesc = {};
    rtvDesc.Format = ToD3D12(static_cast<Format>(desc.format));
    rtvDesc.ViewDimension = D3D12_RTV_DIMENSION_TEXTURE2D;

    auto heap = std::make_unique<D3D12DescriptorHeap>();
    if (!heap->Initialize(m_device.Get(), DescriptorHeapType::RTV, 1, false)) {
        delete view;
        return nullptr;
    }

    view->InitializeAsRenderTarget(m_device.Get(), resource, &rtvDesc, heap.get(), 0);
    view->SetOwnedHeap(std::move(heap));
    
    return view;
}

RHIResourceView* D3D12Device::CreateDepthStencilView(RHITexture* texture, const ResourceViewDesc& desc) {
    auto* view = new D3D12ResourceView();
    auto* d3d12Texture = static_cast<D3D12Texture*>(texture);
    ID3D12Resource* resource = d3d12Texture->GetResource();

    D3D12_DEPTH_STENCIL_VIEW_DESC dsvDesc = {};
    dsvDesc.Format = ToD3D12(static_cast<Format>(desc.format));
    dsvDesc.ViewDimension = D3D12_DSV_DIMENSION_TEXTURE2D;

    auto heap = std::make_unique<D3D12DescriptorHeap>();
    if (!heap->Initialize(m_device.Get(), DescriptorHeapType::DSV, 1, false)) {
        delete view;
        return nullptr;
    }

    view->InitializeAsDepthStencil(m_device.Get(), resource, &dsvDesc, heap.get(), 0);
    view->SetOwnedHeap(std::move(heap));
    return view;
}

RHIResourceView* D3D12Device::CreateShaderResourceView(RHITexture* texture, const ResourceViewDesc& desc) {
    auto* view = new D3D12ResourceView();
    auto* d3d12Texture = static_cast<D3D12Texture*>(texture);
    ID3D12Resource* resource = d3d12Texture->GetResource();

    D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = {};
    srvDesc.Format = ToD3D12(static_cast<Format>(desc.format));
    srvDesc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D;
    srvDesc.Texture2D.MipLevels = desc.mipLevel > 0 ? desc.mipLevel : 1;
    srvDesc.Texture2D.MostDetailedMip = 0;
    srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;

    auto heap = std::make_unique<D3D12DescriptorHeap>();
    if (!heap->Initialize(m_device.Get(), DescriptorHeapType::CBV_SRV_UAV, 1, false)) {
        delete view;
        return nullptr;
    }

    view->InitializeAsShaderResource(m_device.Get(), resource, &srvDesc, heap.get(), 0);
    view->SetOwnedHeap(std::move(heap));
    
    return view;
}

RHIResourceView* D3D12Device::CreateUnorderedAccessView(RHITexture* texture, const ResourceViewDesc& desc) {
    auto* view = new D3D12ResourceView();
    auto* d3d12Texture = static_cast<D3D12Texture*>(texture);
    ID3D12Resource* resource = d3d12Texture->GetResource();

    D3D12_UNORDERED_ACCESS_VIEW_DESC uavDesc = {};
    uavDesc.Format = static_cast<DXGI_FORMAT>(desc.format);
    uavDesc.ViewDimension = D3D12_UAV_DIMENSION_TEXTURE2D;

    auto heap = std::make_unique<D3D12DescriptorHeap>();
    if (!heap->Initialize(m_device.Get(), DescriptorHeapType::CBV_SRV_UAV, 1, false)) {
        delete view;
        return nullptr;
    }

    view->InitializeAsUnorderedAccess(m_device.Get(), resource, &uavDesc, heap.get(), 0);
    view->SetOwnedHeap(std::move(heap));
    return view;
}

D3D12DescriptorHeap* D3D12Device::CreateDescriptorHeap(const DescriptorHeapDesc& desc) {
    auto* heap = new D3D12DescriptorHeap();
    if (!heap->Initialize(m_device.Get(), 
                          static_cast<DescriptorHeapType>(desc.heapType), 
                          desc.descriptorCount, 
                          desc.shaderVisible)) {
        delete heap;
        return nullptr;
    }
    return heap;
}

D3D12QueryHeap* D3D12Device::CreateQueryHeap(const QueryHeapDesc& desc) {
    auto* queryHeap = new D3D12QueryHeap();
    if (!queryHeap->Initialize(m_device.Get(), static_cast<QueryType>(desc.queryType), desc.count)) {
        delete queryHeap;
        return nullptr;
    }
    return queryHeap;
}

D3D12RootSignature* D3D12Device::CreateRootSignature(const RootSignatureDesc& desc) {
    auto* rootSig = new D3D12RootSignature();
    
    D3D12_ROOT_SIGNATURE_DESC rootSigDesc = {};
    rootSigDesc.NumParameters = 0;
    rootSigDesc.NumStaticSamplers = 0;
    rootSigDesc.Flags = D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT;
    
    if (!rootSig->Initialize(m_device.Get(), rootSigDesc)) {
        delete rootSig;
        return nullptr;
    }
    
    return rootSig;
}

D3D12CommandQueue* D3D12Device::CreateCommandQueueImpl(const CommandQueueDesc& desc) {
    return nullptr;
}

D3D12CommandList* D3D12Device::CreateCommandListImpl(const CommandListDesc& desc) {
    return nullptr;
}

} // namespace RHI
} // namespace XCEngine