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/********************************************************************************
 * Copyright (c) 2023 CEA-List
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 ********************************************************************************/

#include <catch2/catch_test_macros.hpp>
#include <memory>

#include "aidge_cpu.hpp"
#include "aidge/data/TensorImpl.hpp"
#include "aidge/data/Tensor.hpp"
#include "aidge/operator/FC.hpp"
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using namespace Aidge;

TEST_CASE("[cpu/oeprator] FC(forward)") {
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    std::shared_ptr<Tensor> myWeights = std::make_shared<Tensor>(Array2D<int, 5, 75>{
            {{1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,
              5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,
              9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12,
              13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15},
             {1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,
              5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,
              9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12,
              13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15},
             {1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,
              5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,
              9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12,
              13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15},
             {1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,
              5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,
              9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12,
              13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15},
             {1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,
              5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,
              9,  10, 11, 12, 13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12,
              13, 14, 15, 1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15}}});
    std::shared_ptr<Tensor> myBias = std::make_shared<Tensor>(Array1D<int, 5>{{1, 2, 3, 4, 5}});
    std::shared_ptr<Tensor> myOutput = std::make_shared<Tensor>(Array2D<int, 2, 5>{
            {{23601, 23602, 23603, 23604, 23605}, {68601, 68602, 68603, 68604, 68605}}});

    std::shared_ptr<Node> myFC = FC(5, false, "myfc");
    myFC->getOperator()->setDatatype(DataType::Int32);
    myFC->getOperator()->setBackend("cpu");
    myFC->getOperator()->associateInput(1, myWeights);
    myFC->getOperator()->associateInput(2, myBias);

    SECTION("2D input") {
        std::shared_ptr<Tensor> myInput = std::make_shared<Tensor>(Array2D<int, 2, 75>{
                {{0,  1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13, 14, 15, 16, 17, 18,
                  19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,
                  38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56,
                  57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74},
                 {75,  76,  77,  78,  79,  80,  81,  82,  83,  84,  85,  86,  87,  88,  89,
                  90,  91,  92,  93,  94,  95,  96,  97,  98,  99,  100, 101, 102, 103, 104,
                  105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
                  120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
                  135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149}}});
        myFC->getOperator()->associateInput(0, myInput);
        myFC->getOperator()->computeOutputDims();
        myFC->forward();
        REQUIRE(*std::static_pointer_cast<Tensor>(myFC->getOperator()->getOutput(0)) == *myOutput);
    }
    SECTION("4D input") {
        std::shared_ptr<Tensor> myInput =
                std::make_shared<Tensor>(Array4D<int, 2, 3, 5, 5>{{{{{0, 1, 2, 3, 4},
                                                                     {5, 6, 7, 8, 9},
                                                                     {10, 11, 12, 13, 14},
                                                                     {15, 16, 17, 18, 19},
                                                                     {20, 21, 22, 23, 24}},
                                                                    {{25, 26, 27, 28, 29},
                                                                     {30, 31, 32, 33, 34},
                                                                     {35, 36, 37, 38, 39},
                                                                     {40, 41, 42, 43, 44},
                                                                     {45, 46, 47, 48, 49}},
                                                                    {{50, 51, 52, 53, 54},
                                                                     {55, 56, 57, 58, 59},
                                                                     {60, 61, 62, 63, 64},
                                                                     {65, 66, 67, 68, 69},
                                                                     {70, 71, 72, 73, 74}}},
                                                                   {{{75, 76, 77, 78, 79},
                                                                     {80, 81, 82, 83, 84},
                                                                     {85, 86, 87, 88, 89},
                                                                     {90, 91, 92, 93, 94},
                                                                     {95, 96, 97, 98, 99}},
                                                                    {{100, 101, 102, 103, 104},
                                                                     {105, 106, 107, 108, 109},
                                                                     {110, 111, 112, 113, 114},
                                                                     {115, 116, 117, 118, 119},
                                                                     {120, 121, 122, 123, 124}},
                                                                    {{125, 126, 127, 128, 129},
                                                                     {130, 131, 132, 133, 134},
                                                                     {135, 136, 137, 138, 139},
                                                                     {140, 141, 142, 143, 144},
                                                                     {145, 146, 147, 148, 149}}}}});
        myFC->getOperator()->associateInput(0, myInput);
        myFC->getOperator()->computeOutputDims();
        myFC->forward();
        REQUIRE(*std::static_pointer_cast<Tensor>(myFC->getOperator()->getOutput(0)) == *myOutput);
    }

    // std::cout << static_cast<Tensor>((*myFC->getOperator())["weight"])[0][0][0][0] << std::endl;
}