/*
   Copyright (c) 2023 Advanced Micro Devices, Inc. All rights reserved.
   Permission is hereby granted, free of charge, to any person obtaining a copy
   of this software and associated documentation files (the "Software"), to deal
   in the Software without restriction, including without limitation the rights
   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   copies of the Software, and to permit persons to whom the Software is
   furnished to do so, subject to the following conditions:
   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANNTY OF ANY KIND, EXPRESS OR
   IMPLIED, INNCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANNY CLAIM, DAMAGES OR OTHER
   LIABILITY, WHETHER INN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   OUT OF OR INN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   THE SOFTWARE.
 */

#include <hip_test_common.hh>

#include <hip/hiprtc.h>
#include <hip/hip_runtime.h>

#include <vector>
#include <fstream>

static constexpr auto saxpy{
    R"(
extern "C"
__global__
void saxpy(float a, float* x, float* y, float* out, size_t n)
{
    size_t tid = blockIdx.x * blockDim.x + threadIdx.x;
    if (tid < n) {
           out[tid] = a * x[tid] + y[tid];
    }
}
)"};

static constexpr size_t num_iterations = 200000;  // 20K times

bool CommitBCToFile(char* executable, size_t exe_size, const std::string& bit_code_file) {
  std::fstream bc_file;
  bc_file.open(bit_code_file, std::ios::out | std::ios::binary);

  if (!bc_file) {
    WARN("Cannot create file");
    ;
    return false;
  }

  bc_file.write(executable, exe_size);
  bc_file.close();

  return true;
}

void GetCodeObjectUsingRTC(size_t codeSize, std::vector<char>& code) {
  hiprtcProgram prog;
  hiprtcCreateProgram(&prog, saxpy, "saxpy.cu", 0, nullptr, nullptr);

  hipDeviceProp_t props;
  int device = 0;
  HIP_CHECK(hipGetDeviceProperties(&props, device));
#ifdef __HIP_PLATFORM_AMD__
  std::string sarg = std::string("--gpu-architecture=") + props.gcnArchName;
#else
  std::string sarg = std::string("--fmad=false");
#endif
  const char* options[] = {sarg.c_str()};
  hiprtcResult compileResult{hiprtcCompileProgram(prog, 1, options)};
  size_t logSize;
  HIPRTC_CHECK(hiprtcGetProgramLogSize(prog, &logSize));
  if (logSize) {
    std::string log(logSize, '\0');
    HIPRTC_CHECK(hiprtcGetProgramLog(prog, &log[0]));
    WARN("Log: " << log);
  }
  REQUIRE(compileResult == HIPRTC_SUCCESS);
  HIPRTC_CHECK(hiprtcGetCodeSize(prog, &codeSize));

  code.resize(codeSize);
  HIPRTC_CHECK(hiprtcGetCode(prog, code.data()));

  HIPRTC_CHECK(hiprtcDestroyProgram(&prog));
}

/**
 * Test Description
 * ------------------------
 *    - Compiles a kernel using hiprtc (mainly to use dynamically find gpu arch).
 *    - Commits the compiled code object to a file.
 *    - Run hipModuleLoad and hipModuleUnload for 20K times.
 *
 * Test source
 * ------------------------
 *    - unit/module/hipModuleLoadUnload.cc
 *
 * Test requirements
 * ------------------------
 *    - HIP_VERSION >= 6.0
 */

TEST_CASE("Stress_hipModuleLoadUnload") {
  size_t code_size = 0;
  std::vector<char> code;
  GetCodeObjectUsingRTC(code_size, code);

  std::string co_file("temp_code_object.txt");
  if (!CommitBCToFile(code.data(), code.size(), co_file)) {
    WARN("Could not commit CO to file ");
    return;
  }

  for (size_t iter_idx = 0; iter_idx < num_iterations; ++iter_idx) {
    if ((iter_idx % 2000) == 0) {
      std::cout << "Iteration :" << iter_idx << std::endl;
      UNSCOPED_INFO("Unscoped Prints");
    }

    hipModule_t module;
    HIP_CHECK(hipModuleLoad(&module, co_file.c_str()));
    HIP_CHECK(hipModuleUnload(module));
  }
}