/* ************************************************************************
 * Copyright (c) 2021-2022 Advanced Micro Devices, Inc.
 * ************************************************************************ */

#include "roclapack_geblttrs_npvt.hpp"

template <typename T, typename U>
rocblas_status rocsolver_geblttrs_npvt_batched_impl(rocblas_handle handle,
                                                    const rocblas_int nb,
                                                    const rocblas_int nblocks,
                                                    const rocblas_int nrhs,
                                                    U A,
                                                    const rocblas_int lda,
                                                    U B,
                                                    const rocblas_int ldb,
                                                    U C,
                                                    const rocblas_int ldc,
                                                    U X,
                                                    const rocblas_int ldx,
                                                    const rocblas_int batch_count)
{
    ROCSOLVER_ENTER_TOP("geblttrs_npvt_batched", "--nb", nb, "--nblocks", nblocks, "--nrhs", nrhs,
                        "--lda", lda, "--ldb", ldb, "--ldc", ldc, "--ldx", ldx, "--batch_count",
                        batch_count);

    if(!handle)
        return rocblas_status_invalid_handle;

    // argument checking
    rocblas_status st = rocsolver_geblttrs_npvt_argCheck(handle, nb, nblocks, nrhs, lda, ldb, ldc,
                                                         ldx, A, B, C, X, batch_count);
    if(st != rocblas_status_continue)
        return st;

    // working with unshifted arrays
    rocblas_int shiftA = 0;
    rocblas_int shiftB = 0;
    rocblas_int shiftC = 0;
    rocblas_int shiftX = 0;

    // normal execution
    rocblas_stride strideA = 0;
    rocblas_stride strideB = 0;
    rocblas_stride strideC = 0;
    rocblas_stride strideX = 0;

    // memory workspace sizes:
    // requirements for calling GETRS
    bool optim_mem;
    size_t size_work1, size_work2, size_work3, size_work4;

    rocsolver_geblttrs_npvt_getMemorySize<true, false, T>(nb, nblocks, nrhs, batch_count,
                                                          &size_work1, &size_work2, &size_work3,
                                                          &size_work4, &optim_mem);

    if(rocblas_is_device_memory_size_query(handle))
        return rocblas_set_optimal_device_memory_size(handle, size_work1, size_work2, size_work3,
                                                      size_work4);

    // memory workspace allocation
    void *work1, *work2, *work3, *work4;
    rocblas_device_malloc mem(handle, size_work1, size_work2, size_work3, size_work4);

    if(!mem)
        return rocblas_status_memory_error;
    work1 = mem[0];
    work2 = mem[1];
    work3 = mem[2];
    work4 = mem[3];

    // Execution
    return rocsolver_geblttrs_npvt_template<true, false, T>(
        handle, nb, nblocks, nrhs, A, shiftA, lda, strideA, B, shiftB, ldb, strideB, C, shiftC, ldc,
        strideC, X, shiftX, ldx, strideX, batch_count, work1, work2, work3, work4, optim_mem);
}

/*
 * ===========================================================================
 *    C wrapper
 * ===========================================================================
 */

extern "C" {

rocblas_status rocsolver_sgeblttrs_npvt_batched(rocblas_handle handle,
                                                const rocblas_int nb,
                                                const rocblas_int nblocks,
                                                const rocblas_int nrhs,
                                                float* const A[],
                                                const rocblas_int lda,
                                                float* const B[],
                                                const rocblas_int ldb,
                                                float* const C[],
                                                const rocblas_int ldc,
                                                float* const X[],
                                                const rocblas_int ldx,
                                                const rocblas_int batch_count)
{
    return rocsolver_geblttrs_npvt_batched_impl<float>(handle, nb, nblocks, nrhs, A, lda, B, ldb, C,
                                                       ldc, X, ldx, batch_count);
}

rocblas_status rocsolver_dgeblttrs_npvt_batched(rocblas_handle handle,
                                                const rocblas_int nb,
                                                const rocblas_int nblocks,
                                                const rocblas_int nrhs,
                                                double* const A[],
                                                const rocblas_int lda,
                                                double* const B[],
                                                const rocblas_int ldb,
                                                double* const C[],
                                                const rocblas_int ldc,
                                                double* const X[],
                                                const rocblas_int ldx,
                                                const rocblas_int batch_count)
{
    return rocsolver_geblttrs_npvt_batched_impl<double>(handle, nb, nblocks, nrhs, A, lda, B, ldb,
                                                        C, ldc, X, ldx, batch_count);
}

rocblas_status rocsolver_cgeblttrs_npvt_batched(rocblas_handle handle,
                                                const rocblas_int nb,
                                                const rocblas_int nblocks,
                                                const rocblas_int nrhs,
                                                rocblas_float_complex* const A[],
                                                const rocblas_int lda,
                                                rocblas_float_complex* const B[],
                                                const rocblas_int ldb,
                                                rocblas_float_complex* const C[],
                                                const rocblas_int ldc,
                                                rocblas_float_complex* const X[],
                                                const rocblas_int ldx,
                                                const rocblas_int batch_count)
{
    return rocsolver_geblttrs_npvt_batched_impl<rocblas_float_complex>(
        handle, nb, nblocks, nrhs, A, lda, B, ldb, C, ldc, X, ldx, batch_count);
}

rocblas_status rocsolver_zgeblttrs_npvt_batched(rocblas_handle handle,
                                                const rocblas_int nb,
                                                const rocblas_int nblocks,
                                                const rocblas_int nrhs,
                                                rocblas_double_complex* const A[],
                                                const rocblas_int lda,
                                                rocblas_double_complex* const B[],
                                                const rocblas_int ldb,
                                                rocblas_double_complex* const C[],
                                                const rocblas_int ldc,
                                                rocblas_double_complex* const X[],
                                                const rocblas_int ldx,
                                                const rocblas_int batch_count)
{
    return rocsolver_geblttrs_npvt_batched_impl<rocblas_double_complex>(
        handle, nb, nblocks, nrhs, A, lda, B, ldb, C, ldc, X, ldx, batch_count);
}

} // extern C
