#if defined(XCENGINE_SUPPORT_VULKAN)

#include "fixtures/VulkanTestFixture.h"
#include "XCEngine/RHI/RHIDescriptorPool.h"
#include "XCEngine/RHI/RHIDescriptorSet.h"
#include "XCEngine/RHI/RHIPipelineLayout.h"
#include "XCEngine/RHI/RHIPipelineState.h"
#include "XCEngine/RHI/RHIResourceView.h"
#include "XCEngine/RHI/Vulkan/VulkanTexture.h"

#include <vector>

using namespace XCEngine::RHI;

namespace {

TEST_F(VulkanGraphicsFixture, CreateUnorderedAccessViewProducesValidView) {
    RHITexture* texture = m_device->CreateTexture(CreateColorTextureDesc(4, 4));
    ASSERT_NE(texture, nullptr);

    ResourceViewDesc viewDesc = {};
    viewDesc.format = static_cast<uint32_t>(Format::R8G8B8A8_UNorm);
    viewDesc.dimension = ResourceViewDimension::Texture2D;

    RHIResourceView* uav = m_device->CreateUnorderedAccessView(texture, viewDesc);
    ASSERT_NE(uav, nullptr);
    EXPECT_TRUE(uav->IsValid());
    EXPECT_EQ(uav->GetViewType(), ResourceViewType::UnorderedAccess);

    uav->Shutdown();
    delete uav;
    texture->Shutdown();
    delete texture;
}

TEST_F(VulkanGraphicsFixture, DispatchWritesUavTexture) {
    RHITexture* texture = m_device->CreateTexture(CreateColorTextureDesc(4, 4));
    ASSERT_NE(texture, nullptr);

    ResourceViewDesc uavDesc = {};
    uavDesc.format = static_cast<uint32_t>(Format::R8G8B8A8_UNorm);
    uavDesc.dimension = ResourceViewDimension::Texture2D;
    RHIResourceView* uav = m_device->CreateUnorderedAccessView(texture, uavDesc);
    ASSERT_NE(uav, nullptr);

    DescriptorPoolDesc poolDesc = {};
    poolDesc.type = DescriptorHeapType::CBV_SRV_UAV;
    poolDesc.descriptorCount = 1;
    poolDesc.shaderVisible = true;
    RHIDescriptorPool* pool = m_device->CreateDescriptorPool(poolDesc);
    ASSERT_NE(pool, nullptr);

    DescriptorSetLayoutBinding uavBinding = {};
    uavBinding.binding = 0;
    uavBinding.type = static_cast<uint32_t>(DescriptorType::UAV);
    uavBinding.count = 1;
    uavBinding.visibility = static_cast<uint32_t>(ShaderVisibility::All);

    DescriptorSetLayoutDesc setLayout = {};
    setLayout.bindings = &uavBinding;
    setLayout.bindingCount = 1;

    RHIPipelineLayoutDesc pipelineLayoutDesc = {};
    pipelineLayoutDesc.setLayouts = &setLayout;
    pipelineLayoutDesc.setLayoutCount = 1;
    RHIPipelineLayout* pipelineLayout = m_device->CreatePipelineLayout(pipelineLayoutDesc);
    ASSERT_NE(pipelineLayout, nullptr);

    RHIDescriptorSet* descriptorSet = pool->AllocateSet(setLayout);
    ASSERT_NE(descriptorSet, nullptr);
    descriptorSet->Update(0, uav);

    GraphicsPipelineDesc pipelineDesc = {};
    pipelineDesc.pipelineLayout = pipelineLayout;
    RHIPipelineState* pipelineState = m_device->CreatePipelineState(pipelineDesc);
    ASSERT_NE(pipelineState, nullptr);

    RHIShader* shader = CreateWriteRedComputeShader();
    ASSERT_NE(shader, nullptr);
    pipelineState->SetComputeShader(shader);
    EXPECT_TRUE(pipelineState->HasComputeShader());
    EXPECT_EQ(pipelineState->GetType(), PipelineType::Compute);

    RHICommandList* commandList = CreateCommandList();
    ASSERT_NE(commandList, nullptr);

    commandList->Reset();
    commandList->TransitionBarrier(uav, ResourceStates::Common, ResourceStates::UnorderedAccess);
    commandList->SetPipelineState(pipelineState);
    RHIDescriptorSet* descriptorSets[] = { descriptorSet };
    commandList->SetComputeDescriptorSets(0, 1, descriptorSets, pipelineLayout);
    commandList->Dispatch(1, 1, 1);
    SubmitAndWait(commandList);

    const std::vector<uint8_t> pixels = ReadTextureRgba8(static_cast<VulkanTexture*>(texture));
    ASSERT_GE(pixels.size(), 4u);
    EXPECT_EQ(pixels[0], 255u);
    EXPECT_EQ(pixels[1], 0u);
    EXPECT_EQ(pixels[2], 0u);
    EXPECT_EQ(pixels[3], 255u);

    commandList->Shutdown();
    delete commandList;
    shader->Shutdown();
    delete shader;
    pipelineState->Shutdown();
    delete pipelineState;
    descriptorSet->Shutdown();
    delete descriptorSet;
    pipelineLayout->Shutdown();
    delete pipelineLayout;
    pool->Shutdown();
    delete pool;
    uav->Shutdown();
    delete uav;
    texture->Shutdown();
    delete texture;
}

TEST_F(VulkanGraphicsFixture, DispatchWritesUavTextureWithGlslComputeShader) {
    RHITexture* texture = m_device->CreateTexture(CreateColorTextureDesc(4, 4));
    ASSERT_NE(texture, nullptr);

    ResourceViewDesc uavDesc = {};
    uavDesc.format = static_cast<uint32_t>(Format::R8G8B8A8_UNorm);
    uavDesc.dimension = ResourceViewDimension::Texture2D;
    RHIResourceView* uav = m_device->CreateUnorderedAccessView(texture, uavDesc);
    ASSERT_NE(uav, nullptr);

    DescriptorPoolDesc poolDesc = {};
    poolDesc.type = DescriptorHeapType::CBV_SRV_UAV;
    poolDesc.descriptorCount = 1;
    poolDesc.shaderVisible = true;
    RHIDescriptorPool* pool = m_device->CreateDescriptorPool(poolDesc);
    ASSERT_NE(pool, nullptr);

    DescriptorSetLayoutBinding uavBinding = {};
    uavBinding.binding = 0;
    uavBinding.type = static_cast<uint32_t>(DescriptorType::UAV);
    uavBinding.count = 1;
    uavBinding.visibility = static_cast<uint32_t>(ShaderVisibility::All);

    DescriptorSetLayoutDesc setLayout = {};
    setLayout.bindings = &uavBinding;
    setLayout.bindingCount = 1;

    RHIPipelineLayoutDesc pipelineLayoutDesc = {};
    pipelineLayoutDesc.setLayouts = &setLayout;
    pipelineLayoutDesc.setLayoutCount = 1;
    RHIPipelineLayout* pipelineLayout = m_device->CreatePipelineLayout(pipelineLayoutDesc);
    ASSERT_NE(pipelineLayout, nullptr);

    RHIDescriptorSet* descriptorSet = pool->AllocateSet(setLayout);
    ASSERT_NE(descriptorSet, nullptr);
    descriptorSet->Update(0, uav);

    GraphicsPipelineDesc pipelineDesc = {};
    pipelineDesc.pipelineLayout = pipelineLayout;
    RHIPipelineState* pipelineState = m_device->CreatePipelineState(pipelineDesc);
    ASSERT_NE(pipelineState, nullptr);

    RHIShader* shader = CreateWriteRedComputeShaderFromGlsl();
    ASSERT_NE(shader, nullptr);
    pipelineState->SetComputeShader(shader);
    EXPECT_TRUE(pipelineState->HasComputeShader());
    EXPECT_EQ(pipelineState->GetType(), PipelineType::Compute);

    RHICommandList* commandList = CreateCommandList();
    ASSERT_NE(commandList, nullptr);

    commandList->Reset();
    commandList->TransitionBarrier(uav, ResourceStates::Common, ResourceStates::UnorderedAccess);
    commandList->SetPipelineState(pipelineState);
    RHIDescriptorSet* descriptorSets[] = { descriptorSet };
    commandList->SetComputeDescriptorSets(0, 1, descriptorSets, pipelineLayout);
    commandList->Dispatch(1, 1, 1);
    SubmitAndWait(commandList);

    const std::vector<uint8_t> pixels = ReadTextureRgba8(static_cast<VulkanTexture*>(texture));
    ASSERT_GE(pixels.size(), 4u);
    EXPECT_EQ(pixels[0], 255u);
    EXPECT_EQ(pixels[1], 0u);
    EXPECT_EQ(pixels[2], 0u);
    EXPECT_EQ(pixels[3], 255u);

    commandList->Shutdown();
    delete commandList;
    shader->Shutdown();
    delete shader;
    pipelineState->Shutdown();
    delete pipelineState;
    descriptorSet->Shutdown();
    delete descriptorSet;
    pipelineLayout->Shutdown();
    delete pipelineLayout;
    pool->Shutdown();
    delete pool;
    uav->Shutdown();
    delete uav;
    texture->Shutdown();
    delete texture;
}

} // namespace

#endif