/*******************************************************
 * Copyright (c) 2014, ArrayFire
 * All rights reserved.
 *
 * This file is distributed under 3-clause BSD license.
 * The complete license agreement can be obtained at:
 * http://arrayfire.com/licenses/BSD-3-Clause
 ********************************************************/

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

using af::cdouble;
using af::cfloat;
using af::dim4;
using af::dtype_traits;
using std::endl;
using std::string;
using std::vector;

template
class Grad : public ::testing::Test {
   public:
    virtual void SetUp() {
        subMat0.push_back(af_make_seq(0, 4, 1));
        subMat0.push_back(af_make_seq(2, 6, 1));
        subMat0.push_back(af_make_seq(0, 2, 1));
    }
    vector subMat0;
};

// create a list of types to be tested
typedef ::testing::Types TestTypes;

// register the type list
TYPED_TEST_SUITE(Grad, TestTypes);

template
void gradTest(string pTestFile, const unsigned resultIdx0,
              const unsigned resultIdx1, bool isSubRef = false,
              const vector* seqv = NULL) {
    SUPPORTED_TYPE_CHECK(T);

    vector numDims;
    vector in;
    vector tests;
    readTests(pTestFile, numDims, in, tests);

    dim4 idims = numDims[0];

    af_array inArray   = 0;
    af_array tempArray = 0;
    af_array g0Array   = 0;
    af_array g1Array   = 0;

    if (isSubRef) {
        ASSERT_SUCCESS(af_create_array(&tempArray, &(in[0].front()),
                                       idims.ndims(), idims.get(),
                                       (af_dtype)dtype_traits::af_type));

        ASSERT_SUCCESS(
            af_index(&inArray, tempArray, seqv->size(), &seqv->front()));
    } else {
        ASSERT_SUCCESS(af_create_array(&inArray, &(in[0].front()),
                                       idims.ndims(), idims.get(),
                                       (af_dtype)dtype_traits::af_type));
    }

    ASSERT_SUCCESS(af_gradient(&g0Array, &g1Array, inArray));

    size_t nElems = tests[resultIdx0].size();
    // Get result
    T* grad0Data = new T[tests[resultIdx0].size()];
    ASSERT_SUCCESS(af_get_data_ptr((void*)grad0Data, g0Array));

    // Compare result
    for (size_t elIter = 0; elIter < nElems; ++elIter) {
        ASSERT_EQ(tests[resultIdx0][elIter], grad0Data[elIter])