/* ************************************************************************
 * Copyright (C) 2016-2025 Advanced Micro Devices, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
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 * to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IM-
 * PLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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 * CTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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 * ************************************************************************ */

#pragma once

#include "testing_common.hpp"

#define ERROR_EPS_MULTIPLIER 40
#define RESIDUAL_EPS_MULTIPLIER 40

template <typename T>
void testing_trsv_bad_arg(const Arguments& arg)
{
    auto rocblas_trsv_fn = arg.api & c_API_FORTRAN ? rocblas_trsv<T, true> : rocblas_trsv<T, false>;

    auto rocblas_trsv_fn_64
        = arg.api & c_API_FORTRAN ? rocblas_trsv_64<T, true> : rocblas_trsv_64<T, false>;

    const int64_t           N      = 100;
    const int64_t           lda    = 100;
    const int64_t           incx   = 1;
    const rocblas_operation transA = rocblas_operation_none;
    const rocblas_fill      uplo   = rocblas_fill_lower;
    const rocblas_diagonal  diag   = rocblas_diagonal_non_unit;

    rocblas_local_handle handle{arg};

    // Naming: `h` is in CPU (host) memory(eg hA), `d` is in GPU (device) memory (eg dA).
    // Allocate host memory
    HOST_MEMCHECK(host_matrix<T>, hA, (N, N, lda));
    HOST_MEMCHECK(host_vector<T>, hx, (N, incx));

    // Allocate device memory
    DEVICE_MEMCHECK(device_matrix<T>, dA, (N, N, lda));
    DEVICE_MEMCHECK(device_vector<T>, dx, (N, incx));

    // Checks.
    DAPI_EXPECT(rocblas_status_invalid_handle,
                rocblas_trsv_fn,
                (nullptr, uplo, transA, diag, N, dA, lda, dx, incx));

    DAPI_EXPECT(rocblas_status_invalid_value,
                rocblas_trsv_fn,
                (handle, rocblas_fill_full, transA, diag, N, dA, lda, dx, incx));

    DAPI_EXPECT(rocblas_status_invalid_value,
                rocblas_trsv_fn,
                (handle, uplo, (rocblas_operation)rocblas_fill_full, diag, N, dA, lda, dx, incx));

    DAPI_EXPECT(rocblas_status_invalid_value,
                rocblas_trsv_fn,
                (handle, uplo, transA, (rocblas_diagonal)rocblas_fill_full, N, dA, lda, dx, incx));

    DAPI_EXPECT(rocblas_status_invalid_pointer,
                rocblas_trsv_fn,
                (handle, uplo, transA, diag, N, nullptr, lda, dx, incx));

    DAPI_EXPECT(rocblas_status_invalid_pointer,
                rocblas_trsv_fn,
                (handle, uplo, transA, diag, N, dA, lda, nullptr, incx));
}

template <typename T>
void testing_trsv(const Arguments& arg)
{
    auto rocblas_trsv_fn = arg.api & c_API_FORTRAN ? rocblas_trsv<T, true> : rocblas_trsv<T, false>;

    auto rocblas_trsv_fn_64
        = arg.api & c_API_FORTRAN ? rocblas_trsv_64<T, true> : rocblas_trsv_64<T, false>;

    int64_t N           = arg.N;
    int64_t lda         = arg.lda;
    int64_t incx        = arg.incx;
    char    char_uplo   = arg.uplo;
    char    char_transA = arg.transA;
    char    char_diag   = arg.diag;

    rocblas_fill      uplo   = char2rocblas_fill(char_uplo);
    rocblas_operation transA = char2rocblas_operation(char_transA);
    rocblas_diagonal  diag   = char2rocblas_diagonal(char_diag);

    rocblas_status       status;
    rocblas_local_handle handle{arg};

    // check here to prevent undefined memory allocation error
    bool invalid_size = N < 0 || lda < N || lda < 1 || !incx;
    if(invalid_size || !N)
    {
        DAPI_EXPECT(invalid_size ? rocblas_status_invalid_size : rocblas_status_success,
                    rocblas_trsv_fn,
                    (handle, uplo, transA, diag, N, nullptr, lda, nullptr, incx));
        return;
    }

    // Naming: `h` is in CPU (host) memory(eg hA), `d` is in GPU (device) memory (eg dA).
    // Allocate host memory
    HOST_MEMCHECK(host_matrix<T>, hA, (N, N, lda));
    HOST_MEMCHECK(host_matrix<T>, hAAT, (N, N, lda));
    HOST_MEMCHECK(host_vector<T>, hb, (N, incx));
    HOST_MEMCHECK(host_vector<T>, hx, (N, incx));
    HOST_MEMCHECK(host_vector<T>, hx_or_b, (N, incx));
    HOST_MEMCHECK(host_vector<T>, cpu_x_or_b, (N, incx));

    // Allocate device memory
    DEVICE_MEMCHECK(device_matrix<T>, dA, (N, N, lda));
    DEVICE_MEMCHECK(device_vector<T>, dx_or_b, (N, incx));

    // Initialize data on host memory
    rocblas_init_matrix(hA,
                        arg,
                        rocblas_client_never_set_nan,
                        rocblas_client_diagonally_dominant_triangular_matrix,
                        true);
    rocblas_init_vector(hx, arg, rocblas_client_never_set_nan, false, true);

    //  make hA unit diagonal if diag == rocblas_diagonal_unit
    if(diag == rocblas_diagonal_unit)
    {
        make_unit_diagonal(uplo, (T*)hA, lda, N);
    }

    hb = hx;

    // Calculate hb = hA*hx;
    ref_trmv<T>(uplo, transA, diag, N, hA, lda, hb, incx);
    cpu_x_or_b = hb; // cpuXorB <- B
    hx_or_b    = hb;

    // copy data from CPU to device
    CHECK_HIP_ERROR(dx_or_b.transfer_from(hx_or_b));
    CHECK_HIP_ERROR(dA.transfer_from(hA));

    double max_err_host            = 0.0;
    double max_err_dev             = 0.0;
    double error_eps_multiplier    = ERROR_EPS_MULTIPLIER;
    double residual_eps_multiplier = RESIDUAL_EPS_MULTIPLIER;
    double eps                     = std::numeric_limits<real_t<T>>::epsilon();

    if(!ROCBLAS_REALLOC_ON_DEMAND)
    {
        // Compute size
        CHECK_ROCBLAS_ERROR(rocblas_start_device_memory_size_query(handle));
        CHECK_ALLOC_QUERY(rocblas_trsv_fn(handle, uplo, transA, diag, N, dA, lda, dx_or_b, incx));
        size_t size;
        CHECK_ROCBLAS_ERROR(rocblas_stop_device_memory_size_query(handle, &size));

        // Allocate memory
        CHECK_ROCBLAS_ERROR(rocblas_set_device_memory_size(handle, size));
    }

    if(arg.unit_check || arg.norm_check)
    {
        if(arg.pointer_mode_host)
        {
            // calculate dxorb <- A^(-1) b   rocblas_device_pointer_host
            CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));

            handle.pre_test(arg);
            DAPI_CHECK(rocblas_trsv_fn, (handle, uplo, transA, diag, N, dA, lda, dx_or_b, incx));
            handle.post_test(arg);

            CHECK_HIP_ERROR(hx_or_b.transfer_from(dx_or_b));
        }

        if(arg.pointer_mode_device)
        {
            // calculate dxorb <- A^(-1) b   rocblas_device_pointer_device
            CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));
            CHECK_HIP_ERROR(dx_or_b.transfer_from(cpu_x_or_b));

            handle.pre_test(arg);
            DAPI_CHECK(rocblas_trsv_fn, (handle, uplo, transA, diag, N, dA, lda, dx_or_b, incx));
            handle.post_test(arg);

            if(arg.repeatability_check)
            {
                HOST_MEMCHECK(host_vector<T>, hx_or_b_copy, (N, incx));
                CHECK_HIP_ERROR(hx_or_b.transfer_from(dx_or_b));
                // multi-GPU support
                int device_id, device_count;
                CHECK_HIP_ERROR(limit_device_count(device_count, (int)arg.devices));

                for(int dev_id = 0; dev_id < device_count; dev_id++)
                {
                    CHECK_HIP_ERROR(hipGetDevice(&device_id));
                    if(device_id != dev_id)
                        CHECK_HIP_ERROR(hipSetDevice(dev_id));

                    //New rocblas handle for new device
                    rocblas_local_handle handle_copy{arg};

                    // Allocate device memory
                    DEVICE_MEMCHECK(device_matrix<T>, dA_copy, (N, N, lda));
                    DEVICE_MEMCHECK(device_vector<T>, dx_or_b_copy, (N, incx));

                    CHECK_HIP_ERROR(dA_copy.transfer_from(hA));

                    CHECK_ROCBLAS_ERROR(
                        rocblas_set_pointer_mode(handle_copy, rocblas_pointer_mode_device));

                    for(int runs = 0; runs < arg.iters; runs++)
                    {

                        CHECK_HIP_ERROR(dx_or_b_copy.transfer_from(cpu_x_or_b));
                        DAPI_CHECK(
                            rocblas_trsv_fn,
                            (handle_copy, uplo, transA, diag, N, dA_copy, lda, dx_or_b_copy, incx));
                        CHECK_HIP_ERROR(hx_or_b_copy.transfer_from(dx_or_b_copy));
                        unit_check_general<T>(1, N, incx, hx_or_b, hx_or_b_copy);
                    }
                }
                return;
            }
        }

        if(arg.pointer_mode_host)
        {
            // computed result is in hx_or_b, so forward error is E = hx - hx_or_b
            // calculate norm 1 of vector E
            max_err_host = rocblas_abs(vector_norm_1<T>(N, incx, hx, hx_or_b));

            if(arg.unit_check)
                trsm_err_res_check<T>(max_err_host, N, error_eps_multiplier, eps);

            // hx_or_b contains A * (calculated X), so res = A * (calculated x) - b = hx_or_b - hb
            ref_trmv<T>(uplo, transA, diag, N, hA, lda, hx_or_b, incx);

            // Calculate norm 1 of vector res
            auto max_err_host_res = rocblas_abs(vector_norm_1<T>(N, incx, hx_or_b, hb));

            if(arg.unit_check)
                trsm_err_res_check<T>(max_err_host_res, N, residual_eps_multiplier, eps);
            max_err_host = std::max(max_err_host, max_err_host_res);
        }

        if(arg.pointer_mode_device)
        {
            CHECK_HIP_ERROR(hx_or_b.transfer_from(dx_or_b));

            max_err_dev = rocblas_abs(vector_norm_1<T>(N, incx, hx, hx_or_b));
            if(arg.unit_check)
                trsm_err_res_check<T>(max_err_dev, N, error_eps_multiplier, eps);

            ref_trmv<T>(uplo, transA, diag, N, hA, lda, hx_or_b, incx);
            auto max_err_dev_res = rocblas_abs(vector_norm_1<T>(N, incx, hx_or_b, hb));

            if(arg.unit_check)
                trsm_err_res_check<T>(max_err_dev_res, N, residual_eps_multiplier, eps);
            max_err_dev = std::max(max_err_dev, max_err_dev_res);
        }
    }

    if(arg.timing)
    {
        double gpu_time_used, cpu_time_used = 0.0;
        int    number_cold_calls = arg.cold_iters;
        int    total_calls       = number_cold_calls + arg.iters;

        hipStream_t stream;
        CHECK_ROCBLAS_ERROR(rocblas_get_stream(handle, &stream));

        for(int iter = 0; iter < total_calls; iter++)
        {
            if(iter == number_cold_calls)
                gpu_time_used = get_time_us_sync(stream);

            DAPI_DISPATCH(rocblas_trsv_fn, (handle, uplo, transA, diag, N, dA, lda, dx_or_b, incx));
        }

        gpu_time_used = get_time_us_sync(stream) - gpu_time_used; // in microseconds

        if(arg.unit_check || arg.norm_check)
        {
            // CPU cblas
            cpu_time_used = get_time_us_no_sync();

            ref_trsv<T>(uplo, transA, diag, N, hA, lda, cpu_x_or_b, incx);

            cpu_time_used = get_time_us_no_sync() - cpu_time_used;
        }

        ArgumentModel<e_uplo, e_transA, e_diag, e_N, e_lda, e_incx>{}.log_args<T>(
            rocblas_cout,
            arg,
            gpu_time_used,
            trsv_gflop_count<T>(N),
            ArgumentLogging::NA_value,
            cpu_time_used,
            max_err_host,
            max_err_dev);
    }
}