/*
 * Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
 *
 * SPDX-License-Identifier: MIT
 */

#pragma once

#include <memory>
#include "rocprogram.hpp"
#include "top.hpp"
#include "rocprintf.hpp"

namespace amd::roc {

class Kernel : public device::Kernel {
 public:
  Kernel(const std::string& name, Program* prog) : device::Kernel(prog->device(), name, *prog) {}

  virtual ~Kernel() {
    if (program() != nullptr) {
      // Add kernel to the map of all kernels on the device
      program()->rocDevice().RemoveKernel(*this);
    }
  }

  //! Initializes the metadata required for this kernel
  virtual bool init() final;

  //! Setup after code object loading
  bool postLoad();

  const Program* program() const { return static_cast<const Program*>(&prog_); }

  //! Pull demangled name, used only for logging
  const std::string& getDemangledName() {
    std::call_once(demangle_once_, [this] {
      amd::Os::CxaDemangle(name(), &demangled_name_);
    });
    return demangled_name_;
  }

  //! Returns the cached metadata kernel descriptor, or nullptr if lookup failed.
  const hsa_amd_metadata_kernel_descriptor_t* MetadataKernelDescriptor() const {
    return metadataKernelDescriptor_;
  }

  //! Kernarg preload length in DWORDs (from kernel descriptor)
  uint16_t MetadataPreloadLength() const { return metadata_preload_length_; }

  //! Kernarg preload offset in DWORDs (from kernel descriptor)
  uint16_t MetadataPreloadOffset() const { return metadata_preload_offset_; }

  std::string demangled_name_;  //!< Cache demangled name
  std::once_flag demangle_once_;

 private:
  const hsa_amd_metadata_kernel_descriptor_t* metadataKernelDescriptor_ = nullptr;
  uint16_t metadata_preload_length_ = 0;
  uint16_t metadata_preload_offset_ = 0;
};

}  // namespace amd::roc