/*! \file */
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#include "testing.hpp"

template <typename T>
void testing_inverse_permutation_bad_arg(const Arguments& arg)
{
    rocsparse_local_handle local_handle;
    rocsparse_handle       handle = local_handle;
    rocsparse_int          n      = 1;
    rocsparse_int*         p      = (rocsparse_int*)0x4;
    rocsparse_int*         q      = (rocsparse_int*)0x4;
    rocsparse_index_base   base   = rocsparse_index_base_zero;
    bad_arg_analysis(rocsparse_inverse_permutation, handle, n, p, q, base);
}

template <typename T>
void testing_inverse_permutation(const Arguments& arg)
{
    rocsparse_int        N    = arg.N;
    rocsparse_index_base base = arg.baseA;

    // Create rocsparse handle
    rocsparse_local_handle handle;

    // Allocate host memory
    host_dense_vector<rocsparse_int> hp(N);

    for(rocsparse_int i = 0; i < N; ++i)
    {
        hp[i] = i + base;
    }

    for(rocsparse_int k = 0; k < std::min(20, N / 2); ++k)
    {
        rocsparse_int i = random_generator_exact<rocsparse_int>(0, N - 1);
        rocsparse_int j = random_generator_exact<rocsparse_int>(0, N - 1);
        if(i != j)
        {
            std::swap(hp[i], hp[j]);
        }
    }
    device_dense_vector<rocsparse_int> dp(hp);
    device_dense_vector<rocsparse_int> dq(N);

    if(arg.unit_check)
    {
        host_dense_vector<rocsparse_int> hq(N);

        for(rocsparse_int i = 0; i < N; ++i)
        {
            hq[hp[i] - base] = i + base;
        }
        CHECK_ROCSPARSE_ERROR(testing::rocsparse_inverse_permutation(handle, N, dp, dq, base));
        hq.unit_check(dq);
    }

    if(arg.timing)
    {
        int number_cold_calls = 2;
        int number_hot_calls  = arg.iters;

        // Warm up
        for(int iter = 0; iter < number_cold_calls; ++iter)
        {
            CHECK_ROCSPARSE_ERROR(rocsparse_inverse_permutation(handle, N, dp, dq, base));
        }

        double gpu_time_used = get_time_us();

        // Performance run
        for(int iter = 0; iter < number_hot_calls; ++iter)
        {
            CHECK_ROCSPARSE_ERROR(rocsparse_inverse_permutation(handle, N, dp, dq, base));
        }

        gpu_time_used = (get_time_us() - gpu_time_used) / number_hot_calls;

        double gbyte_count = inverse_permutation_gbyte_count<T>(N);
        double gpu_gbyte   = get_gpu_gbyte(gpu_time_used, gbyte_count);
        display_timing_info(display_key_t::N,
                            N,
                            display_key_t::bandwidth,
                            gpu_gbyte,
                            display_key_t::time_ms,
                            get_gpu_time_msec(gpu_time_used));
    }
}

#define INSTANTIATE(TYPE)                                                          \
    template void testing_inverse_permutation_bad_arg<TYPE>(const Arguments& arg); \
    template void testing_inverse_permutation<TYPE>(const Arguments& arg)
INSTANTIATE(float);
INSTANTIATE(double);
INSTANTIATE(rocsparse_float_complex);
INSTANTIATE(rocsparse_double_complex);
void testing_inverse_permutation_extra(const Arguments& arg) {}
