/* ************************************************************************
 * Copyright (C) 2018-2022 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
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell cop-
 * ies of the Software, and to permit persons to whom the Software is furnished
 * 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
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNE-
 * CTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * ************************************************************************ */

#pragma once

#include "bytes.hpp"
#include "cblas_interface.hpp"
#include "flops.hpp"
#include "norm.hpp"
#include "rocblas.hpp"
#include "rocblas_init.hpp"
#include "rocblas_math.hpp"
#include "rocblas_random.hpp"
#include "rocblas_test.hpp"
#include "rocblas_vector.hpp"
#include "type_dispatch.hpp"
#include "unit.hpp"
#include "utility.hpp"

/* ============================================================================================ */
template <typename Ta, typename Tx = Ta, typename Ty = Tx, typename Tex = Ty>
void testing_axpy_batched_ex_bad_arg(const Arguments& arg)
{
    auto rocblas_axpy_batched_ex_fn
        = arg.fortran ? rocblas_axpy_batched_ex_fortran : rocblas_axpy_batched_ex;

    for(auto pointer_mode : {rocblas_pointer_mode_host, rocblas_pointer_mode_device})
    {
        rocblas_local_handle handle{arg};
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, pointer_mode));

        rocblas_datatype alpha_type     = rocblas_type2datatype<Ta>();
        rocblas_datatype x_type         = rocblas_type2datatype<Tx>();
        rocblas_datatype y_type         = rocblas_type2datatype<Ty>();
        rocblas_datatype execution_type = rocblas_type2datatype<Tex>();

        rocblas_int N = 100, incx = 1, incy = 1, batch_count = 2;

        device_vector<Ta> alpha_d(1), zero_d(1);

        const Ta alpha_h(1), zero_h(0);

        const Ta* alpha = &alpha_h;
        const Ta* zero  = &zero_h;

        if(pointer_mode == rocblas_pointer_mode_device)
        {
            CHECK_HIP_ERROR(hipMemcpy(alpha_d, alpha, sizeof(*alpha), hipMemcpyHostToDevice));
            alpha = alpha_d;
            CHECK_HIP_ERROR(hipMemcpy(zero_d, zero, sizeof(*zero), hipMemcpyHostToDevice));
            zero = zero_d;
        }

        // Allocate device memory
        device_batch_vector<Tx> dx(N, incx, batch_count);
        device_batch_vector<Ty> dy(N, incy, batch_count);

        // Check device memory allocation
        CHECK_DEVICE_ALLOCATION(dx.memcheck());
        CHECK_DEVICE_ALLOCATION(dy.memcheck());

        EXPECT_ROCBLAS_STATUS(rocblas_axpy_batched_ex_fn(nullptr,
                                                         N,
                                                         &alpha,
                                                         alpha_type,
                                                         dx.ptr_on_device(),
                                                         x_type,
                                                         incx,
                                                         dy.ptr_on_device(),
                                                         y_type,
                                                         incy,
                                                         batch_count,
                                                         execution_type),
                              rocblas_status_invalid_handle);

#ifdef GOOGLE_TEST
        rocblas_status status;

        status = rocblas_axpy_batched_ex_fn(handle,
                                            N,
                                            nullptr,
                                            alpha_type,
                                            dx.ptr_on_device(),
                                            x_type,
                                            incx,
                                            dy.ptr_on_device(),
                                            y_type,
                                            incy,
                                            batch_count,
                                            execution_type);
        EXPECT_TRUE(status == rocblas_status_invalid_pointer
                    || status == rocblas_status_not_implemented);

        if(pointer_mode == rocblas_pointer_mode_host)
        {
            status = rocblas_axpy_batched_ex_fn(handle,
                                                N,
                                                alpha,
                                                alpha_type,
                                                nullptr,
                                                x_type,
                                                incx,
                                                dy.ptr_on_device(),
                                                y_type,
                                                incy,
                                                batch_count,
                                                execution_type);
            EXPECT_TRUE(status == rocblas_status_invalid_pointer
                        || status == rocblas_status_not_implemented);

            status = rocblas_axpy_batched_ex_fn(handle,
                                                N,
                                                alpha,
                                                alpha_type,
                                                dx.ptr_on_device(),
                                                x_type,
                                                incx,
                                                nullptr,
                                                y_type,
                                                incy,
                                                batch_count,
                                                execution_type);
            EXPECT_TRUE(status == rocblas_status_invalid_pointer
                        || status == rocblas_status_not_implemented);
        }

        // If N == 0, then X and Y can be nullptr without error
        status = rocblas_axpy_batched_ex_fn(handle,
                                            0,
                                            nullptr,
                                            alpha_type,
                                            nullptr,
                                            x_type,
                                            incx,
                                            nullptr,
                                            y_type,
                                            incy,
                                            batch_count,
                                            execution_type);
        EXPECT_TRUE(status == rocblas_status_success || status == rocblas_status_not_implemented);

        // If alpha == 0, then X and Y can be nullptr without error
        status = rocblas_axpy_batched_ex_fn(handle,
                                            N,
                                            zero,
                                            alpha_type,
                                            nullptr,
                                            x_type,
                                            incx,
                                            nullptr,
                                            y_type,
                                            incy,
                                            batch_count,
                                            execution_type);
        EXPECT_TRUE(status == rocblas_status_success || status == rocblas_status_not_implemented);

        // If batch_count == 0, then X and Y can be nullptr without error
        status = rocblas_axpy_batched_ex_fn(handle,
                                            N,
                                            nullptr,
                                            alpha_type,
                                            nullptr,
                                            x_type,
                                            incx,
                                            nullptr,
                                            y_type,
                                            incy,
                                            0,
                                            execution_type);
        EXPECT_TRUE(status == rocblas_status_success || status == rocblas_status_not_implemented);
#endif
    }
}

template <typename Ta, typename Tx = Ta, typename Ty = Tx, typename Tex = Ty>
void testing_axpy_batched_ex(const Arguments& arg)
{
    auto rocblas_axpy_batched_ex_fn
        = arg.fortran ? rocblas_axpy_batched_ex_fortran : rocblas_axpy_batched_ex;

    rocblas_datatype alpha_type     = arg.a_type;
    rocblas_datatype x_type         = arg.b_type;
    rocblas_datatype y_type         = arg.c_type;
    rocblas_datatype execution_type = arg.compute_type;

    rocblas_local_handle handle{arg};
    rocblas_int          N = arg.N, incx = arg.incx, incy = arg.incy, batch_count = arg.batch_count;

    Ta  h_alpha    = arg.get_alpha<Ta>();
    Tex h_alpha_ex = (Tex)h_alpha;

    // argument sanity check before allocating invalid memory
    if(N <= 0 || batch_count <= 0)
    {
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));
        EXPECT_ROCBLAS_STATUS(rocblas_axpy_batched_ex_fn(handle,
                                                         N,
                                                         nullptr,
                                                         alpha_type,
                                                         nullptr,
                                                         x_type,
                                                         incx,
                                                         nullptr,
                                                         y_type,
                                                         incy,
                                                         batch_count,
                                                         execution_type),
                              rocblas_status_success);
        return;
    }

    size_t abs_incx = std::abs(incx);
    size_t abs_incy = std::abs(incy);
    size_t size_x   = N * (abs_incx ? abs_incx : 1);
    size_t size_y   = N * (abs_incy ? abs_incy : 1);

    // Naming: `h` is in CPU (host) memory(eg hx), `d` is in GPU (device) memory (eg dx).
    // Allocate host memory
    host_batch_vector<Tx> hx(N, incx ? incx : 1, batch_count);
    host_batch_vector<Ty> hy(N, incy ? incy : 1, batch_count), hy1(N, incy ? incy : 1, batch_count),
        hy2(N, incy ? incy : 1, batch_count);
    host_batch_vector<Tex> hy_ex(N, incy ? incy : 1, batch_count);
    host_batch_vector<Tex> hx_ex(N, incx ? incx : 1, batch_count);
    host_vector<Ta>        halpha(1);

    // Check host memory allocation
    CHECK_HIP_ERROR(hx.memcheck());
    CHECK_HIP_ERROR(hy.memcheck());
    CHECK_HIP_ERROR(hy1.memcheck());
    CHECK_HIP_ERROR(hy2.memcheck());
    CHECK_HIP_ERROR(halpha.memcheck());

    // Allocate device memory
    device_batch_vector<Tx> dx(N, incx ? incx : 1, batch_count);
    device_batch_vector<Ty> dy(N, incy ? incy : 1, batch_count);
    device_vector<Ta>       dalpha(1);

    // Check device memory allocation
    CHECK_DEVICE_ALLOCATION(dx.memcheck());
    CHECK_DEVICE_ALLOCATION(dy.memcheck());
    CHECK_DEVICE_ALLOCATION(dalpha.memcheck());

    // Assign host alpha.
    halpha[0] = h_alpha;

    // Initialize data on host memory
    rocblas_init_vector(hx, arg, rocblas_client_alpha_sets_nan, true);
    rocblas_init_vector(hy, arg, rocblas_client_alpha_sets_nan, false);

    for(rocblas_int b = 0; b < batch_count; b++)
    {
        for(size_t i = 0; i < size_y; i++)
            hy_ex[b][i] = (Tex)hy[b][i];
        for(size_t i = 0; i < size_x; i++)
            hx_ex[b][i] = (Tex)hx[b][i];
    }

    // Device memory.
    double gpu_time_used, cpu_time_used;
    double rocblas_error_1 = 0.0;
    double rocblas_error_2 = 0.0;

    if(arg.unit_check || arg.norm_check)
    {
        // Transfer host to device
        CHECK_HIP_ERROR(dx.transfer_from(hx));

        // Call routine with pointer mode on host.

        // Pointer mode.
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));

        // Call routine.
        CHECK_HIP_ERROR(dy.transfer_from(hy));
        handle.pre_test(arg);
        CHECK_ROCBLAS_ERROR(rocblas_axpy_batched_ex_fn(handle,
                                                       N,
                                                       halpha,
                                                       alpha_type,
                                                       dx.ptr_on_device(),
                                                       x_type,
                                                       incx,
                                                       dy.ptr_on_device(),
                                                       y_type,
                                                       incy,
                                                       batch_count,
                                                       execution_type));
        handle.post_test(arg);
        // Transfer from device to host.
        CHECK_HIP_ERROR(hy1.transfer_from(dy));

        // Pointer mode.
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_device));

        // Call routine.
        CHECK_HIP_ERROR(dalpha.transfer_from(halpha));
        CHECK_HIP_ERROR(dy.transfer_from(hy));
        handle.pre_test(arg);
        CHECK_ROCBLAS_ERROR(rocblas_axpy_batched_ex_fn(handle,
                                                       N,
                                                       dalpha,
                                                       alpha_type,
                                                       dx.ptr_on_device(),
                                                       x_type,
                                                       incx,
                                                       dy.ptr_on_device(),
                                                       y_type,
                                                       incy,
                                                       batch_count,
                                                       execution_type));
        handle.post_test(arg);
        // Transfer from device to host.
        CHECK_HIP_ERROR(hy2.transfer_from(dy));

        // CPU BLAS
        {
            cpu_time_used = get_time_us_no_sync();

            // Compute the host solution.
            for(rocblas_int b = 0; b < batch_count; ++b)
            {
                cblas_axpy<Tex>(N, h_alpha_ex, hx_ex[b], incx, hy_ex[b], incy);
            }
            cpu_time_used = get_time_us_no_sync() - cpu_time_used;

            for(rocblas_int b = 0; b < batch_count; b++)
            {
                for(size_t i = 0; i < size_y; i++)
                    hy[b][i] = hy_ex[b][i];
            }
        }

        // Compare with with hsolution.
        if(arg.unit_check)
        {
            unit_check_general<Ty>(1, N, abs_incy, hy, hy1, batch_count);

            unit_check_general<Ty>(1, N, abs_incy, hy, hy2, batch_count);
        }

        if(arg.norm_check)
        {
            rocblas_error_1 = norm_check_general<Ty>('I', 1, N, abs_incy, hy, hy1, batch_count);
            rocblas_error_2 = norm_check_general<Ty>('I', 1, N, abs_incy, hy, hy2, batch_count);
        }
    }

    if(arg.timing)
    {
        int number_cold_calls = arg.cold_iters;
        int number_hot_calls  = arg.iters;
        CHECK_ROCBLAS_ERROR(rocblas_set_pointer_mode(handle, rocblas_pointer_mode_host));

        // Transfer from host to device.
        CHECK_HIP_ERROR(dy.transfer_from(hy));

        // Cold.
        for(int iter = 0; iter < number_cold_calls; iter++)
        {
            rocblas_axpy_batched_ex_fn(handle,
                                       N,
                                       &h_alpha,
                                       alpha_type,
                                       dx.ptr_on_device(),
                                       x_type,
                                       incx,
                                       dy.ptr_on_device(),
                                       y_type,
                                       incy,
                                       batch_count,
                                       execution_type);
        }

        // Transfer from host to device.
        CHECK_HIP_ERROR(dy.transfer_from(hy));

        hipStream_t stream;
        CHECK_ROCBLAS_ERROR(rocblas_get_stream(handle, &stream));
        gpu_time_used = get_time_us_sync(stream); // in microseconds
        for(int iter = 0; iter < number_hot_calls; iter++)
        {
            rocblas_axpy_batched_ex_fn(handle,
                                       N,
                                       &h_alpha,
                                       alpha_type,
                                       dx.ptr_on_device(),
                                       x_type,
                                       incx,
                                       dy.ptr_on_device(),
                                       y_type,
                                       incy,
                                       batch_count,
                                       execution_type);
        }
        gpu_time_used = get_time_us_sync(stream) - gpu_time_used;

        ArgumentModel<e_N, e_alpha, e_incx, e_incy, e_batch_count>{}.log_args<Ta>(
            rocblas_cout,
            arg,
            gpu_time_used,
            axpy_gflop_count<Ta>(N),
            axpy_gbyte_count<Ta>(N),
            cpu_time_used,
            rocblas_error_1,
            rocblas_error_2);
    }
}
