/*******************************************************
 * 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 <gtest/gtest.h>
#include <arrayfire.h>
#include <af/dim4.hpp>
#include <af/traits.hpp>
#include <string>
#include <vector>
#include <complex>
#include <testHelpers.hpp>

using std::vector;
using std::string;
using std::abs;
using af::cfloat;
using af::cdouble;

template<typename T>
class DotF : public ::testing::Test
{
    public:
        virtual void SetUp() {}
};

template<typename T>
class DotC  : public ::testing::Test
{
    public:
        virtual void SetUp() {}
};

// create lists of types to be tested
typedef ::testing::Types<float, double> TestTypesF;
typedef ::testing::Types<cfloat, cdouble> TestTypesC;

// register the type list
TYPED_TEST_CASE(DotF,  TestTypesF);
TYPED_TEST_CASE(DotC,  TestTypesC);

template<typename T>
void dotTest(string pTestFile, const int resultIdx,
        const af_mat_prop optLhs = AF_MAT_NONE, const af_mat_prop optRhs = AF_MAT_NONE)
{
    if (noDoubleTests<T>()) return;

    using af::dim4;

    vector<dim4>        numDims;
    vector<vector<T> >  in;
    vector<vector<T> >  tests;

    readTests<T, T, T>(pTestFile, numDims, in, tests);

    dim4 aDims     = numDims[0];
    dim4 bDims     = numDims[1];

    af_array a = 0;
    af_array b = 0;
    af_array out = 0;

    ASSERT_EQ(AF_SUCCESS, af_create_array(&a, &(in[0].front()),
                aDims.ndims(), aDims.get(), (af_dtype)af::dtype_traits<T>::af_type));
    ASSERT_EQ(AF_SUCCESS, af_create_array(&b, &(in[1].front()),
                bDims.ndims(), bDims.get(), (af_dtype)af::dtype_traits<T>::af_type));

    ASSERT_EQ(AF_SUCCESS, af_dot(&out, a, b, optLhs, optRhs));

    vector<T> goldData = tests[resultIdx];
    size_t nElems      = goldData.size();
    T *outData      = new T[nElems];

    ASSERT_EQ(AF_SUCCESS, af_get_data_ptr((void*)outData, out));

    for (size_t elIter=0; elIter<nElems; ++elIter) {
        ASSERT_NEAR(abs(goldData[elIter]), abs(outData[elIter]), 0.03)<< "at: " << elIter<< std::endl;
    }

    delete[] outData;
    ASSERT_EQ(AF_SUCCESS, af_release_array(a));
    ASSERT_EQ(AF_SUCCESS, af_release_array(b));
    ASSERT_EQ(AF_SUCCESS, af_release_array(out));
}

#define INSTANTIATEF(SIZE, FILENAME)                                                            \
TYPED_TEST(DotF, DotF_##SIZE)                                                                   \
{                                                                                               \
    dotTest<TypeParam>(string(TEST_DIR"/blas/"#FILENAME".test"), 0);                            \
}                                                                                               \


#define INSTANTIATEC(SIZE, FILENAME)                                                            \
TYPED_TEST(DotC, DotC_CC_##SIZE)                                                                \
{                                                                                               \
    dotTest<TypeParam>(string(TEST_DIR"/blas/"#FILENAME".test"), 0, AF_MAT_CONJ, AF_MAT_CONJ);  \
}                                                                                               \
TYPED_TEST(DotC, DotC_UU_##SIZE)                                                                \
{                                                                                               \
    dotTest<TypeParam>(string(TEST_DIR"/blas/"#FILENAME".test"), 1, AF_MAT_NONE, AF_MAT_NONE);  \
}                                                                                               \
TYPED_TEST(DotC, DotC_CU_##SIZE)                                                                \
{                                                                                               \
    dotTest<TypeParam>(string(TEST_DIR"/blas/"#FILENAME".test"), 2, AF_MAT_CONJ, AF_MAT_NONE);  \
}                                                                                               \
TYPED_TEST(DotC, DotC_UC_##SIZE)                                                                \
{                                                                                               \
    dotTest<TypeParam>(string(TEST_DIR"/blas/"#FILENAME".test"), 3, AF_MAT_NONE, AF_MAT_CONJ);  \
}                                                                                               \


INSTANTIATEF(1000   , dot_f_1000);
INSTANTIATEF(10     , dot_f_10);
INSTANTIATEF(25600  , dot_f_25600);
INSTANTIATEC(1000   , dot_c_1000);
INSTANTIATEC(10     , dot_c_10);
INSTANTIATEC(25600  , dot_c_25600);

///////////////////////////////////// CPP ////////////////////////////////
//
TEST(DotF, CPP)
{
    using af::array;
    using af::dim4;

    vector<dim4>         numDims;
    vector<vector<float> >  in;
    vector<vector<float> >  tests;

    readTests<float, float, float>(TEST_DIR"/blas/dot_f_1000.test", numDims, in, tests);

    dim4 aDims     = numDims[0];
    dim4 bDims     = numDims[1];

    array a(aDims, &(in[0].front()));
    array b(bDims, &(in[1].front()));

    array out = dot(a, b, AF_MAT_CONJ, AF_MAT_NONE);

    vector<float> goldData = tests[0];
    size_t nElems         = goldData.size();
    float *outData       = new float[nElems];

    out.host(outData);

    for (size_t elIter=0; elIter<nElems; ++elIter) {
        ASSERT_EQ(goldData[elIter], outData[elIter]) << "at: " << elIter<< std::endl;
    }

    delete[] outData;
}

TEST(DotCCU, CPP)
{
    using af::array;
    using af::dim4;

    vector<dim4>         numDims;
    vector<vector<cfloat> >  in;
    vector<vector<cfloat> >  tests;

    readTests<cfloat, cfloat, cfloat>(TEST_DIR"/blas/dot_c_1000.test", numDims, in, tests);

    dim4 aDims     = numDims[0];
    dim4 bDims     = numDims[1];

    array a(aDims, &(in[0].front()));
    array b(bDims, &(in[1].front()));

    array out = dot(a, b, AF_MAT_CONJ, AF_MAT_NONE);

    vector<cfloat> goldData = tests[2];
    size_t nElems         = goldData.size();
    cfloat *outData       = new cfloat[nElems];

    out.host(outData);

    for (size_t elIter=0; elIter<nElems; ++elIter) {
        ASSERT_EQ(goldData[elIter], outData[elIter]) << "at: " << elIter<< std::endl;
    }

    delete[] outData;
}
