#ifndef PETSCDEVICE_CUDA_H
#define PETSCDEVICE_CUDA_H

#include <petscdevice.h>
#include <petscpkg_version.h>

#if defined(__NVCC__) || defined(__CUDACC__)
#define PETSC_USING_NVCC 1
#endif

#if PetscDefined(HAVE_CUDA)
#include <cuda.h>
#include <cuda_runtime.h>
#include <cublas_v2.h>
#include <cusolverDn.h>
#include <cusolverSp.h>
#include <cufft.h>

/* cuBLAS does not have cublasGetErrorName(). We create one on our own. */
PETSC_EXTERN const char *PetscCUBLASGetErrorName(cublasStatus_t); /* PETSC_EXTERN since it is exposed by the CHKERRCUBLAS macro */
PETSC_EXTERN const char *PetscCUSolverGetErrorName(cusolverStatus_t);
PETSC_EXTERN const char *PetscCUFFTGetErrorName(cufftResult);

/* REMOVE ME */
#define WaitForCUDA() cudaDeviceSynchronize()

/* CUDART_VERSION = 1000 x major + 10 x minor version */

/* Could not find exactly which CUDART_VERSION introduced cudaGetErrorName. At least it was in CUDA 8.0 (Sep. 2016) */
#if PETSC_PKG_CUDA_VERSION_GE(8, 0, 0)
#define PetscCallCUDAVoid(...) \
  do { \
    const cudaError_t _p_cuda_err__ = __VA_ARGS__; \
    PetscCheckAbort(_p_cuda_err__ == cudaSuccess, PETSC_COMM_SELF, PETSC_ERR_GPU, "cuda error %d (%s) : %s", (PetscErrorCode)_p_cuda_err__, cudaGetErrorName(_p_cuda_err__), cudaGetErrorString(_p_cuda_err__)); \
  } while (0)

#define PetscCallCUDA(...) \
  do { \
    const cudaError_t _p_cuda_err__ = __VA_ARGS__; \
    PetscCheck(_p_cuda_err__ == cudaSuccess, PETSC_COMM_SELF, PETSC_ERR_GPU, "cuda error %d (%s) : %s", (PetscErrorCode)_p_cuda_err__, cudaGetErrorName(_p_cuda_err__), cudaGetErrorString(_p_cuda_err__)); \
  } while (0)
#else /* PETSC_PKG_CUDA_VERSION_GE(8,0,0) */
#define PetscCallCUDA(...) \
  do { \
    const cudaError_t _p_cuda_err__ = __VA_ARGS__; \
    PetscCheck(_p_cuda_err__ == cudaSuccess, PETSC_COMM_SELF, PETSC_ERR_GPU, "cuda error %d", (PetscErrorCode)_p_cuda_err__); \
  } while (0)

#define PetscCallCUDAVoid(...) \
  do { \
    const cudaError_t _p_cuda_err__ = __VA_ARGS__; \
    PetscCheckAbort(_p_cuda_err__ == cudaSuccess, PETSC_COMM_SELF, PETSC_ERR_GPU, "cuda error %d", (PetscErrorCode)_p_cuda_err__); \
  } while (0)
#endif /* PETSC_PKG_CUDA_VERSION_GE(8,0,0) */
#define CHKERRCUDA(...) PetscCallCUDA(__VA_ARGS__)

#define PetscCUDACheckLaunch \
  do { \
    /* Check synchronous errors, i.e. pre-launch */ \
    PetscCallCUDA(cudaGetLastError()); \
    /* Check asynchronous errors, i.e. kernel failed (ULF) */ \
    PetscCallCUDA(cudaDeviceSynchronize()); \
  } while (0)

#define PetscCallCUBLAS(...) \
  do { \
    const cublasStatus_t _p_cublas_stat__ = __VA_ARGS__; \
    if (PetscUnlikely(_p_cublas_stat__ != CUBLAS_STATUS_SUCCESS)) { \
      const char *name = PetscCUBLASGetErrorName(_p_cublas_stat__); \
      if (((_p_cublas_stat__ == CUBLAS_STATUS_NOT_INITIALIZED) || (_p_cublas_stat__ == CUBLAS_STATUS_ALLOC_FAILED)) && PetscDeviceInitialized(PETSC_DEVICE_CUDA)) { \
        SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU_RESOURCE, \
                "cuBLAS error %d (%s). " \
                "Reports not initialized or alloc failed; " \
                "this indicates the GPU may have run out resources", \
                (PetscErrorCode)_p_cublas_stat__, name); \
      } else { \
        SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU, "cuBLAS error %d (%s)", (PetscErrorCode)_p_cublas_stat__, name); \
      } \
    } \
  } while (0)
#define CHKERRCUBLAS(...) PetscCallCUBLAS(__VA_ARGS__)

#if (CUSPARSE_VER_MAJOR > 10 || CUSPARSE_VER_MAJOR == 10 && CUSPARSE_VER_MINOR >= 2) /* According to cuda/10.1.168 on OLCF Summit */
#define PetscCallCUSPARSE(...) \
  do { \
    const cusparseStatus_t _p_cusparse_stat__ = __VA_ARGS__; \
    if (PetscUnlikely(_p_cusparse_stat__)) { \
      const char *name  = cusparseGetErrorName(_p_cusparse_stat__); \
      const char *descr = cusparseGetErrorString(_p_cusparse_stat__); \
      PetscCheck((_p_cusparse_stat__ != CUSPARSE_STATUS_NOT_INITIALIZED) && (_p_cusparse_stat__ != CUSPARSE_STATUS_ALLOC_FAILED), PETSC_COMM_SELF, PETSC_ERR_GPU_RESOURCE, \
                 "cuSPARSE errorcode %d (%s) : %s.; " \
                 "this indicates the GPU has run out resources", \
                 (int)_p_cusparse_stat__, name, descr); \
      SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU, "cuSPARSE errorcode %d (%s) : %s", (int)_p_cusparse_stat__, name, descr); \
    } \
  } while (0)
#else /* (CUSPARSE_VER_MAJOR > 10 || CUSPARSE_VER_MAJOR == 10 && CUSPARSE_VER_MINOR >= 2) */
#define PetscCallCUSPARSE(...) \
  do { \
    const cusparseStatus_t _p_cusparse_stat__ = __VA_ARGS__; \
    PetscCheck(_p_cusparse_stat__ == CUSPARSE_STATUS_SUCCESS, PETSC_COMM_SELF, PETSC_ERR_GPU, "cuSPARSE errorcode %d", (PetscErrorCode)_p_cusparse_stat__); \
  } while (0)
#endif /* (CUSPARSE_VER_MAJOR > 10 || CUSPARSE_VER_MAJOR == 10 && CUSPARSE_VER_MINOR >= 2) */
#define CHKERRCUSPARSE(...) PetscCallCUSPARSE(__VA_ARGS__)

#define PetscCallCUSOLVER(...) \
  do { \
    const cusolverStatus_t _p_cusolver_stat__ = __VA_ARGS__; \
    if (PetscUnlikely(_p_cusolver_stat__ != CUSOLVER_STATUS_SUCCESS)) { \
      const char *name = PetscCUSolverGetErrorName(_p_cusolver_stat__); \
      if (((_p_cusolver_stat__ == CUSOLVER_STATUS_NOT_INITIALIZED) || (_p_cusolver_stat__ == CUSOLVER_STATUS_ALLOC_FAILED) || (_p_cusolver_stat__ == CUSOLVER_STATUS_INTERNAL_ERROR)) && PetscDeviceInitialized(PETSC_DEVICE_CUDA)) { \
        SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU_RESOURCE, \
                "cuSolver error %d (%s). " \
                "This indicates the GPU may have run out resources", \
                (PetscErrorCode)_p_cusolver_stat__, name); \
      } else { \
        SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU, "cuSolver error %d (%s)", (PetscErrorCode)_p_cusolver_stat__, name); \
      } \
    } \
  } while (0)
#define CHKERRCUSOLVER(...) PetscCallCUSOLVER(__VA_ARGS__)

#define PetscCallCUFFT(...) \
  do { \
    const cufftResult_t _p_cufft_stat__ = __VA_ARGS__; \
    if (PetscUnlikely(_p_cufft_stat__ != CUFFT_SUCCESS)) { \
      const char *name = PetscCUFFTGetErrorName(_p_cufft_stat__); \
      if (((_p_cufft_stat__ == CUFFT_SETUP_FAILED) || (_p_cufft_stat__ == CUFFT_ALLOC_FAILED)) && PetscDeviceInitialized(PETSC_DEVICE_CUDA)) { \
        SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU_RESOURCE, \
                "cuFFT error %d (%s). " \
                "Reports not initialized or alloc failed; " \
                "this indicates the GPU has run out resources", \
                (PetscErrorCode)_p_cufft_stat__, name); \
      } else { \
        SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU, "cuFFT error %d (%s)", (PetscErrorCode)_p_cufft_stat__, name); \
      } \
    } \
  } while (0)
#define CHKERRCUFFT(...) PetscCallCUFFT(__VA_ARGS__)

#define PetscCallCURAND(...) \
  do { \
    const curandStatus_t _p_curand_stat__ = __VA_ARGS__; \
    if (PetscUnlikely(_p_curand_stat__ != CURAND_STATUS_SUCCESS)) { \
      if (((_p_curand_stat__ == CURAND_STATUS_INITIALIZATION_FAILED) || (_p_curand_stat__ == CURAND_STATUS_ALLOCATION_FAILED)) && PetscDeviceInitialized(PETSC_DEVICE_CUDA)) { \
        SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU_RESOURCE, \
                "cuRAND error %d. " \
                "Reports not initialized or alloc failed; " \
                "this indicates the GPU has run out resources", \
                (PetscErrorCode)_p_curand_stat__); \
      } else { \
        SETERRQ(PETSC_COMM_SELF, PETSC_ERR_GPU, "cuRand error %d", (PetscErrorCode)_p_curand_stat__); \
      } \
    } \
  } while (0)
#define CHKERRCURAND(...) PetscCallCURAND(__VA_ARGS__)

PETSC_EXTERN cudaStream_t   PetscDefaultCudaStream; // The default stream used by PETSc
PETSC_EXTERN PetscErrorCode PetscCUBLASGetHandle(cublasHandle_t *);
PETSC_EXTERN PetscErrorCode PetscCUSOLVERDnGetHandle(cusolverDnHandle_t *);

#endif // PETSC_HAVE_CUDA

// these can also be defined in petscdevice_hip.h
#ifndef PETSC_DEVICE_DEFINED_DECLS_PRIVATE
#define PETSC_DEVICE_DEFINED_DECLS_PRIVATE
#if PetscDefined(USING_NVCC)
#define PETSC_HOST_DECL      __host__
#define PETSC_DEVICE_DECL    __device__
#define PETSC_KERNEL_DECL    __global__
#define PETSC_SHAREDMEM_DECL __shared__
#define PETSC_FORCEINLINE    __forceinline__
#define PETSC_CONSTMEM_DECL  __constant__
#else
#define PETSC_HOST_DECL
#define PETSC_DEVICE_DECL
#define PETSC_KERNEL_DECL
#define PETSC_SHAREDMEM_DECL
#define PETSC_FORCEINLINE inline
#define PETSC_CONSTMEM_DECL
#endif // PETSC_USING_NVCC

#define PETSC_HOSTDEVICE_DECL        PETSC_HOST_DECL PETSC_DEVICE_DECL
#define PETSC_DEVICE_INLINE_DECL     PETSC_DEVICE_DECL PETSC_FORCEINLINE
#define PETSC_HOSTDEVICE_INLINE_DECL PETSC_HOSTDEVICE_DECL PETSC_FORCEINLINE
#endif // PETSC_DEVICE_DEFINED_DECLS_PRIVATE

#endif // PETSCDEVICE_CUDA_H