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#pragma once
#include <iostream>
#include <vector>
#include "include/ctc_prefix_decoder_host.h"

namespace cu_ctc {
constexpr size_t ALIGN_BYTES = 128;
constexpr int MAX_BLOCKS = 800;

template <typename T>
class DeviceDataWrap {
 public:
  DeviceDataWrap() : data_{}, size_in_bytes_{} {}
  DeviceDataWrap(T* data_ptr, size_t size_in_byte)
      : data_{data_ptr}, size_in_bytes_{size_in_byte} {}
  void print(size_t offset, size_t size_in_element, int eles_per_row = 10)
      const {
    if ((offset + size_in_element) * sizeof(T) > size_in_bytes_) {
      std::cerr
          << " ERROR: in DeviceDataWrap print : offset+size_in_element > size_in_bytes_";
      abort();
    }
    std::vector<T> host_data(size_in_element);
    CUDA_CHECK(cudaMemcpy(
        host_data.data(),
        data_ + offset,
        size_in_element * sizeof(T),
        cudaMemcpyDeviceToHost));

    for (int i = 0; i < size_in_element; ++i) {
      if (i != 0 && (i % eles_per_row == 0)) {
        std::cout << " \n";
      }
      std::cout << "[" << i << "]:" << host_data[i] << " ";
    }
    std::cout << "\n";
  }

  operator T*() {
    return data_;
  }

  operator const T*() {
    return const_cast<const T*>(data_);
  }

  T* data_ptr() const {
    return data_;
  }
  size_t size_in_byte() const {
    return size_in_bytes_;
  }
  void set_data_ptr(T* data_ptr) {
    data_ = data_ptr;
  }
  void set_size_in_byte(size_t size_in_byte) {
    size_in_bytes_ = size_in_byte;
  }

 private:
  T* data_;
  size_t size_in_bytes_;
};
} // namespace cu_ctc
