// Copyright 2024 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
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// 3. Neither the name of the copyright holder nor the names of its
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//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include <cstdint>
#include <limits>
#include <string>
#include <vector>

#include "dawn/common/NonMovable.h"
#include "dawn/tests/unittests/validation/ValidationTest.h"
#include "dawn/utils/WGPUHelpers.h"

namespace dawn {
namespace {

class ImmediateDataDisableTest : public ValidationTest {};

// Check that creating a PipelineLayout with non-zero immediateDataRangeByteSize is disallowed
// without the feature enabled.
TEST_F(ImmediateDataDisableTest, ImmediateDataRangeByteSizeNotAllowed) {
    wgpu::PipelineLayoutDescriptor desc;
    desc.bindGroupLayoutCount = 0;
    desc.immediateDataRangeByteSize = 1;

    ASSERT_DEVICE_ERROR(device.CreatePipelineLayout(&desc));
}

class ImmediateDataTest : public ValidationTest {
  protected:
    std::vector<wgpu::FeatureName> GetRequiredFeatures() override {
        // Test only the non-coherent version, ad assume that the same validaiton code paths are
        // taken for the coherent path
        return {wgpu::FeatureName::ChromiumExperimentalImmediateData};
    }

    uint32_t GetMaxImmediateDataRangeByteSize() {
        if (maxImmediateDataByteSize != std::numeric_limits<uint32_t>::max()) {
            return maxImmediateDataByteSize;
        }
        wgpu::SupportedLimits supportedLimits = {};
        wgpu::DawnExperimentalImmediateDataLimits immediateDataLimits = {};
        supportedLimits.nextInChain = &immediateDataLimits;
        device.GetLimits(&supportedLimits);
        for (auto* chain = supportedLimits.nextInChain; chain; chain = chain->nextInChain) {
            switch (chain->sType) {
                case (wgpu::SType::DawnExperimentalImmediateDataLimits): {
                    auto* t = static_cast<wgpu::DawnExperimentalImmediateDataLimits*>(
                        supportedLimits.nextInChain);
                    maxImmediateDataByteSize = t->maxImmediateDataRangeByteSize;
                    break;
                }
                default:
                    DAWN_UNREACHABLE();
            }
        }
        return maxImmediateDataByteSize;
    }

    uint32_t maxImmediateDataByteSize = std::numeric_limits<uint32_t>::max();
};

// Check that non-zero immediateDataRangeByteSize is possible with feature enabled and size must
// below max size limits.
TEST_F(ImmediateDataTest, ValidateImmediateDataRangeByteSize) {
    DAWN_SKIP_TEST_IF(!device.HasFeature(wgpu::FeatureName::ChromiumExperimentalImmediateData));

    wgpu::PipelineLayoutDescriptor desc;
    desc.bindGroupLayoutCount = 0;

    uint32_t maxImmediateDataRangeByteSize = GetMaxImmediateDataRangeByteSize();
    // Success case with valid immediateDataRangeByteSize.
    {
        desc.immediateDataRangeByteSize = maxImmediateDataRangeByteSize;
        device.CreatePipelineLayout(&desc);
    }

    // Failed case with invalid immediateDataRangeByteSize that exceed limits.
    {
        desc.immediateDataRangeByteSize = maxImmediateDataRangeByteSize + 1;
        ASSERT_DEVICE_ERROR(device.CreatePipelineLayout(&desc));
    }
}

// Check that SetImmediateData offset and length must be aligned to 4 bytes.
TEST_F(ImmediateDataTest, ValidateSetImmediateDataAlignment) {
    DAWN_SKIP_TEST_IF(!device.HasFeature(wgpu::FeatureName::ChromiumExperimentalImmediateData));

    // Success cases
    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        uint32_t data = 0;
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(0, &data, 4);
        computePass.End();
        encoder.Finish();
    }

    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(4, nullptr, 0);
        computePass.End();
        encoder.Finish();
    }

    // Failed case with non-aligned offset bytes
    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(2, nullptr, 0);
        computePass.End();
        ASSERT_DEVICE_ERROR(encoder.Finish());
    }

    // Failed cases with non-aligned size
    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        uint8_t data = 0;
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(0, &data, 2);
        computePass.End();
        ASSERT_DEVICE_ERROR(encoder.Finish());
    }
}

// Check that SetImmediateData offset + length must be in bound.
TEST_F(ImmediateDataTest, ValidateSetImmediateDataOOB) {
    DAWN_SKIP_TEST_IF(!device.HasFeature(wgpu::FeatureName::ChromiumExperimentalImmediateData));

    uint32_t maxImmediateDataRangeByteSize = GetMaxImmediateDataRangeByteSize();

    // Success cases
    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        std::vector<uint32_t> data(maxImmediateDataRangeByteSize / 4, 0);
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(0, data.data(), maxImmediateDataRangeByteSize);
        computePass.End();
        encoder.Finish();
    }

    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(maxImmediateDataRangeByteSize, nullptr, 0);
        computePass.End();
        encoder.Finish();
    }

    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        uint32_t data = 0;
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(maxImmediateDataRangeByteSize - 4, &data, 4);
        computePass.End();
        encoder.Finish();
    }

    // Failed case with offset oob
    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        uint32_t offset = maxImmediateDataRangeByteSize + 4;
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(offset, nullptr, 0);
        computePass.End();
        ASSERT_DEVICE_ERROR(encoder.Finish());
    }

    // Failed cases with size oob
    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        uint32_t size = maxImmediateDataRangeByteSize + 4;
        std::vector<uint32_t> data(size / 4, 0);
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(0, data.data(), size);
        computePass.End();
        ASSERT_DEVICE_ERROR(encoder.Finish());
    }

    // Failed cases with offset + size oob
    {
        wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
        uint32_t offset = maxImmediateDataRangeByteSize;
        uint32_t data[] = {0};
        wgpu::ComputePassEncoder computePass = encoder.BeginComputePass();
        computePass.SetImmediateData(offset, data, 4);
        computePass.End();
        ASSERT_DEVICE_ERROR(encoder.Finish());
    }
}

}  // anonymous namespace
}  // namespace dawn