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*/

/*
hipArrayCreate API test scenarios
1. Negative Scenarios
2. Allocating Small and big chunk data
3. Multithreaded scenario
*/

#include <array>
#include <numeric>
#include <hip_test_common.hh>
#include "hipArrayCommon.hh"
#include "DriverContext.hh"

static constexpr size_t NUM_W{4};
static constexpr size_t BIGNUM_W{100};
static constexpr size_t NUM_H{4};
static constexpr size_t BIGNUM_H{100};
static constexpr auto ARRAY_LOOP{100};

/*
 * This API verifies  memory allocations for small and
 * bigger chunks of data.
 * Two scenarios are verified in this API
 * 1. SmallArray: Allocates NUM_W*NUM_H in a loop and
 *    releases the memory and verifies the meminfo.
 * 2. BigArray: Allocates BIGNUM_W*BIGNUM_H in a loop and
 *    releases the memory and verifies the meminfo
 *
 * In both cases, the memory info before allocation and
 * after releasing the memory should be the same.
 *
 */

static void ArrayCreate_DiffSizes(int gpu) {
  HIP_CHECK_THREAD(hipSetDevice(gpu));
  //Use of GENERATE in thead function causes random failures with multithread condition.
  std::vector<std::pair<size_t, size_t>> runs {std::make_pair(NUM_W, NUM_H), std::make_pair(BIGNUM_W, BIGNUM_H)};
  for (const auto& size : runs) {
    std::array<HIP_ARRAY, ARRAY_LOOP> array;
    size_t pavail, avail;
    HIP_CHECK_THREAD(hipMemGetInfo(&pavail, nullptr));
    HIP_ARRAY_DESCRIPTOR desc;
    desc.NumChannels = 1;
    desc.Width = std::get<0>(size);
    desc.Height = std::get<1>(size);
    desc.Format = HIP_AD_FORMAT_FLOAT;

    for (int i = 0; i < ARRAY_LOOP; i++) {
      HIP_CHECK_THREAD(hipArrayCreate(&array[i], &desc));
    }
    for (int i = 0; i < ARRAY_LOOP; i++) {
      HIP_CHECK_THREAD(hipArrayDestroy(array[i]));
    }

    HIP_CHECK_THREAD(hipMemGetInfo(&avail, nullptr));
    REQUIRE_THREAD(pavail == avail);
  }
}

/* This testcase verifies hipArrayCreate API for small and big chunks data*/
TEST_CASE("Unit_hipArrayCreate_DiffSizes") {
  ArrayCreate_DiffSizes(0);
  HIP_CHECK_THREAD_FINALIZE();
}

/*
This testcase verifies the hipArrayCreate API in multithreaded
scenario by launching threads in parallel on multiple GPUs
and verifies the hipArrayCreate API with small and big chunks data
*/
TEST_CASE("Unit_hipArrayCreate_MultiThread") {
  std::vector<std::thread> threadlist;
  int devCnt = 0;

  devCnt = HipTest::getDeviceCount();

  const size_t pavail = getFreeMem();
  for (int i = 0; i < devCnt; i++) {
    threadlist.push_back(std::thread(ArrayCreate_DiffSizes, i));
  }

  for (auto& t : threadlist) {
    t.join();
  }
  HIP_CHECK_THREAD_FINALIZE();
  const size_t avail = getFreeMem();

  if (pavail != avail) {
    WARN("Memory leak of hipMalloc3D API in multithreaded scenario");
    REQUIRE(false);
  }
}


// Tests /////////////////////////////////////////

#if HT_AMD
constexpr auto MemoryTypeHost = hipMemoryTypeHost;
constexpr auto MemoryTypeArray = hipMemoryTypeArray;
constexpr auto NORMALIZED_COORDINATES = HIP_TRSF_NORMALIZED_COORDINATES;
constexpr auto READ_AS_INTEGER = HIP_TRSF_READ_AS_INTEGER;
#else
constexpr auto MemoryTypeHost = CU_MEMORYTYPE_HOST;
constexpr auto MemoryTypeArray = CU_MEMORYTYPE_ARRAY;
// (EXSWCPHIPT-92) HIP equivalents not defined for CUDA backend.
constexpr auto NORMALIZED_COORDINATES = CU_TRSF_NORMALIZED_COORDINATES;
constexpr auto READ_AS_INTEGER = CU_TRSF_READ_AS_INTEGER;
#endif

// Copy data from host to the hiparray, accounting 1D or 2D arrays
template <typename T>
void copyToArray(hiparray dst, const std::vector<T>& src, const size_t height) {
  const auto sizeInBytes = src.size() * sizeof(T);
  if (height == 0) {
    // FIXME(EXSWCPHIPT-64) remove cast when API is fixed (will require major version change)
    HIP_CHECK(hipMemcpyHtoA(reinterpret_cast<hipArray*>(dst), 0, src.data(), sizeInBytes));
  } else {
    const auto pitch = sizeInBytes / height;
    hip_Memcpy2D copyParams{};
    copyParams.srcMemoryType = MemoryTypeHost;
    copyParams.srcXInBytes = 0;  // x offset
    copyParams.srcY = 0;         // y offset
    copyParams.srcHost = src.data();
    copyParams.srcPitch = pitch;


    copyParams.dstMemoryType = MemoryTypeArray;
    copyParams.dstXInBytes = 0;  // x offset
    copyParams.dstY = 0;         // y offset
    copyParams.dstArray = dst;

    copyParams.WidthInBytes = pitch;
    copyParams.Height = height;

    HIP_CHECK(hipMemcpyParam2D(&copyParams));
  }
}

// Test the allocated array by generating a texture from it then reading from that texture.
// Textures are read-only, so write to the array then copy that into normal device memory.
template <typename T>
void testArrayAsTexture(hiparray array, const size_t width, const size_t height) {
  using vec_info = vector_info<T>;
  using scalar_type = typename vec_info::type;
  const auto h = height ? height : 1;
  const auto size = sizeof(T) * width * h;

  // set hip array
  std::vector<scalar_type> hostData(width * h * vec_info::size);
  // assigned ascending values to the data array to show indexing is working
  std::iota(std::begin(hostData), std::end(hostData), 0);

  copyToArray(array, hostData, height);

  // create texture
  hipTextureObject_t textObj{};

  HIP_RESOURCE_DESC resDesc{};
  memset(&resDesc, 0, sizeof(HIP_RESOURCE_DESC));
  resDesc.resType = HIP_RESOURCE_TYPE_ARRAY;
  resDesc.res.array.hArray = array;
  resDesc.flags = 0;

  HIP_TEXTURE_DESC texDesc{};
  memset(&texDesc, 0, sizeof(HIP_TEXTURE_DESC));
  // use the actual values in the texture, not normalized data
  texDesc.filterMode = HIP_TR_FILTER_MODE_POINT;
  // Use normalized coordinates and also read the data in the original data type
  texDesc.flags |= NORMALIZED_COORDINATES | READ_AS_INTEGER;

  HIP_CHECK(hipTexObjectCreate(&textObj, &resDesc, &texDesc, nullptr));

  // run kernel
  T* device_data{};
  HIP_CHECK(hipMalloc(&device_data, size));
  readFromTexture<<<dim3(width / BlockSize, height ? height / BlockSize : 1, 1),
                    dim3(BlockSize, height ? BlockSize : 1, 1)>>>(device_data, textObj, width,
                                                                  height, false);
  HIP_CHECK(hipGetLastError());  // check for errors when running the kernel

  // copy data back and then test it
  std::fill(std::begin(hostData), std::end(hostData), 0);
  HIP_CHECK(hipMemcpy(hostData.data(), device_data, size, hipMemcpyDeviceToHost));

  checkDataIsAscending(hostData);

  // clean up
  HIP_CHECK(hipTexObjectDestroy(textObj));
  HIP_CHECK(hipFree(device_data));
}

// Selection of types chosen since trying all types would be slow to compile
// Test the happy path of the hipArrayCreate
TEMPLATE_TEST_CASE("Unit_hipArrayCreate_happy", "", uint, int, int4, ushort, short2, char, uchar2,
                   char4, float, float2, float4) {
#if HT_AMD
  if (std::is_same<uint, TestType>::value || std::is_same<ushort, TestType>::value ||
      std::is_same<uchar2, TestType>::value) {
    HipTest::HIP_SKIP_TEST("Probably EXSWCPHIPT-62");
    return;
  }
#endif
  using vec_info = vector_info<TestType>;
  DriverContext ctx;

  HIP_ARRAY_DESCRIPTOR desc;
  desc.Format = vec_info::format;
  desc.NumChannels = vec_info::size;
  desc.Width = 1024;
  desc.Height = GENERATE(0, 1024);

  size_t initFree = getFreeMem();

  // pointer to the array in device memory
  hiparray array{};

  HIP_CHECK(hipArrayCreate(&array, &desc));

  testArrayAsTexture<TestType>(array, desc.Width, desc.Height);

  size_t finalFree = getFreeMem();

  const size_t allocSize = sizeof(TestType) * desc.Width * (desc.Height ? desc.Height : 1);
  // will be aligned to some size, so this is not exact
  REQUIRE(initFree - finalFree >= allocSize);

  HIP_CHECK(hipArrayDestroy(array));
}


// Only widths and Heights up to the maxTexture size is supported
TEMPLATE_TEST_CASE("Unit_hipArrayCreate_maxTexture", "", uint, int, int4, ushort, short2, char,
                   uchar2, char4, float, float2, float4) {
  using vec_info = vector_info<TestType>;
  DriverContext ctx;

  HIP_ARRAY_DESCRIPTOR desc;
  desc.Format = vec_info::format;
  desc.NumChannels = vec_info::size;

  const Sizes sizes(hipArrayDefault);
  const size_t s = 64;

  hiparray array{};
  SECTION("Happy") {
    SECTION("1D - Max") {
      desc.Width = sizes.max1D;
      desc.Height = 0;
    }
    SECTION("2D - Max Width") {
      desc.Width = sizes.max2D[0];
      desc.Height = s;
    }
    SECTION("2D - Max Height") {
      desc.Width = s;
      desc.Height = sizes.max2D[1];
    }
    SECTION("2D - Max Width and Height") {
      desc.Width = sizes.max2D[0];
      desc.Height = sizes.max2D[1];
    }
    auto maxArrayCreateError = hipArrayCreate(&array, &desc);
    // this can try to alloc many GB of memory, so out of memory is acceptable
    // return to avoid destroy
    if (maxArrayCreateError == hipErrorOutOfMemory) return;
    HIP_CHECK(maxArrayCreateError);
    HIP_CHECK(hipArrayDestroy(array));
  }
  SECTION("Negative") {
    SECTION("1D - More Than Max") {
      desc.Width = sizes.max1D + 1;
      desc.Height = 0;
    }
    SECTION("2D - More Than Max Width") {
      desc.Width = sizes.max2D[0] + 1;
      desc.Height = s;
    }
    SECTION("2D - More Than Max Height") {
      desc.Width = s;
      desc.Height = sizes.max2D[1] + 1;
    }
    SECTION("2D - More Than Max Width and Height") {
      desc.Width = sizes.max2D[0] + 1;
      desc.Height = sizes.max2D[1] + 1;
    }
    HIP_CHECK_ERROR(hipArrayCreate(&array, &desc), hipErrorInvalidValue);
  }
}

// zero-width array is not supported
TEST_CASE("Unit_hipArrayCreate_ZeroWidth") {
  DriverContext ctx;
  HIP_ARRAY_DESCRIPTOR desc;
  desc.Format = driverFormats[0];
  desc.NumChannels = 4;
  desc.Width = 0;
  desc.Height = GENERATE(0, 1024);

  // pointer to the array in device memory
  hiparray array;
  HIP_CHECK_ERROR(hipArrayCreate(&array, &desc), hipErrorInvalidValue);
}

// HipArrayCreate will return an error when nullptr is used as the array argument
TEST_CASE("Unit_hipArrayCreate_Nullptr") {
  DriverContext ctx;
  SECTION("Null array") {
    HIP_ARRAY_DESCRIPTOR desc;
    desc.Format = driverFormats[0];
    desc.NumChannels = 4;
    desc.Width = 1024;
    desc.Height = 1024;

    HIP_CHECK_ERROR(hipArrayCreate(nullptr, &desc), hipErrorInvalidValue);
  }
  SECTION("Null Description") {
    hiparray array;
    HIP_CHECK_ERROR(hipArrayCreate(&array, nullptr), hipErrorInvalidValue);
  }
}

// Only elements with 1,2, or 4 channels is supported
TEST_CASE("Unit_hipArrayCreate_BadNumberChannelElement") {
  DriverContext ctx;
  HIP_ARRAY_DESCRIPTOR desc;
  desc.Format = GENERATE(from_range(std::begin(driverFormats), std::end(driverFormats)));
  desc.NumChannels = GENERATE(-1, 0, 3, 5, 8);
  desc.Width = 1024;
  desc.Height = GENERATE(0, 1024);

  hiparray array;

  INFO("Format: " << formatToString(desc.Format) << " NumChannels: " << desc.NumChannels
                  << " Height: " << desc.Height)
  HIP_CHECK_ERROR(hipArrayCreate(&array, &desc), hipErrorInvalidValue);
}

// Only certain channel formats are acceptable.
TEST_CASE("Unit_hipArrayCreate_BadChannelFormat") {
  DriverContext ctx;
  HIP_ARRAY_DESCRIPTOR desc;

  // create a bad format
  desc.Format =
      std::accumulate(std::begin(driverFormats), std::end(driverFormats), driverFormats[0],
                      [](auto i, auto f) { return static_cast<decltype(desc.Format)>(i + f); });
  for (auto&& format : driverFormats) {
    REQUIRE(desc.Format != format);
  }

  desc.NumChannels = 4;
  desc.Width = 1024;
  desc.Height = GENERATE(0, 1024);

  hiparray array;

  INFO("Format: " << formatToString(desc.Format) << " Height: " << desc.Height)
  HIP_CHECK_ERROR(hipArrayCreate(&array, &desc), hipErrorInvalidValue);
}