// Copyright (C) 2020-2021 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
//

#include "layer_transformation.hpp"

#include <map>
#include <memory>
#include <string>
#include <vector>

#include <gtest/gtest.h>
#include <low_precision/fake_quantize.hpp>

#include "common_test_utils/ngraph_test_utils.hpp"
#include "lpt_ngraph_functions/fold_fake_quantize_function.hpp"
#include "lpt_ngraph_functions/common/dequantization_operations.hpp"
#include "simple_low_precision_transformer.hpp"
#include "low_precision/network_helper.hpp"
#include "lpt_ngraph_functions/common/builders.hpp"

using namespace testing;
using namespace ngraph;
using namespace ngraph::pass;

class FoldFakeQuantizeInTransformationsTestValues {
public:
    class Actual {
    public:
        std::vector<float> constValues;
        ngraph::element::Type constPrecision;
        builder::subgraph::FakeQuantizeOnData fakeQuantize;
        ngraph::element::Type fqOutPrecision;
    };

    class Expected {
    public:
        std::vector<float> constValues;
        ngraph::element::Type constPrecision;
    };

    ngraph::Shape constShape;
    low_precision::LayerTransformation::Params params;
    bool updatePrecision;
    bool roundValues;
    Actual actual;
    Expected expected;
};

inline std::ostream& operator<<(std::ostream& os, const std::vector<float>& values) {
    os << "{ ";
    for (size_t i = 0; i < values.size(); ++i) {
        os << values[i];
        if (i != (values.size() - 1ul)) {
            os << ", ";
        }
    }
    os << " }";
    return os;
}

class FoldFakeQuantizeInTransformations : public LayerTransformation, public testing::WithParamInterface<FoldFakeQuantizeInTransformationsTestValues> {
public:
    void SetUp() override {
        const FoldFakeQuantizeInTransformationsTestValues testValues = GetParam();

        const low_precision::LayerTransformation::Params params = low_precision::LayerTransformation::Params(testValues.params).
            setUpdatePrecisions(testValues.updatePrecision);

        const auto constant = std::make_shared<ngraph::opset1::Constant>(
            testValues.actual.constPrecision, testValues.constShape, testValues.actual.constValues);

        std::shared_ptr<Node> fq = ngraph::builder::subgraph::makeFakeQuantizeTypeRelaxed(constant, element::f32, testValues.actual.fakeQuantize);
        ngraph::pass::low_precision::NetworkHelper::setOutDataPrecision(as_type_ptr<opset1::FakeQuantize>(fq), testValues.actual.fqOutPrecision);
        fq = ngraph::pass::low_precision::NetworkHelper::fold_fake_quantize(as_type_ptr<opset1::FakeQuantize>(fq), testValues.roundValues);
        ngraph::ResultVector results{ std::make_shared<ngraph::opset1::Result>(fq) };
        actualFunction = std::make_shared<ngraph::Function>(results, ngraph::ParameterVector{}, "FoldFakeQuantizeFunction");

        referenceFunction = ngraph::builder::subgraph::FoldFakeQuantizeFunction::getReference(
            testValues.expected.constPrecision,
            testValues.constShape,
            testValues.expected.constValues);
    }

    static std::string getTestCaseName(testing::TestParamInfo<FoldFakeQuantizeInTransformationsTestValues> obj) {
        FoldFakeQuantizeInTransformationsTestValues testValues = obj.param;

        std::ostringstream result;
        result << LayerTransformation::getTestCaseNameByParams(testValues.actual.constPrecision, testValues.constShape, testValues.params) <<
            (testValues.updatePrecision ? "" : "_notUpdatePrecision_") << testValues.actual.fakeQuantize << testValues.actual.constValues <<
            "_" << testValues.roundValues;
        return result.str();
    }
};

TEST_P(FoldFakeQuantizeInTransformations, CompareFunctions) {
    actualFunction->validate_nodes_and_infer_types();
    auto res = compare_functions(referenceFunction, actualFunction, true, false);
    ASSERT_TRUE(res.first) << res.second;
}

const std::vector<FoldFakeQuantizeInTransformationsTestValues> testValues = {
    {
        Shape{2, 2, 2, 2},
        LayerTransformation::createParamsU8I8(),
        true,
        true,
        {
            {
                1, 0, 77, 125,
                254, 100, 0, 127,
                0, 64, 1, 254,
                7, 0, 9, 0
            },
            ngraph::element::f32,
            { 255ul, {}, { 0.f }, { 254.f }, { -127.f }, { 127.f } },
            ngraph::element::i8,
        },
        {
            {
                -126, -127, -50, -2,
                127, -27, -127, 0,
                -127, -63, -126, 127,
                -120, -127, -118, -127
            },
            ngraph::element::f32
        },
    },
    {
        Shape{2, 2, 2, 2},
        LayerTransformation::createParamsU8I8(),
        true,
        false,
        {
            {
                1, -1, 77, 125,
                254, 100, 0, 127,
                -2, 64, 1, 300,
                7, -200, 9, -301
            },
            ngraph::element::f32,
            { 255ul, {}, { 0.f }, { 254.f }, { -12.7f }, { 12.7f } },
            ngraph::element::f32,
        },
        {
            {
                -12.6f, -12.7f, -5.0f, -0.2f,
                12.7f, -2.7f, -12.7f, 0.f,
                -12.7f, -6.3f, -12.6f, 12.7f,
                -12.0f, -12.7f, -11.8f, -12.7f
            },
            ngraph::element::f32
        },
    },
    {
        Shape{2, 2, 2, 2},
        LayerTransformation::createParamsU8I8(),
        true,
        false,
        {
            {
                1, -1, 77, 125,
                254, 100, 0, 127,
                -2, 64, 1, 300,
                7, -200, 9, -301
            },
            ngraph::element::f32,
            { 256ul, {}, { 0.f }, { 255.f }, { -12.8f }, { 12.7f } },
            ngraph::element::f32
        },
        {
            {
                -12.7f, -12.8f, -5.1f, -0.3f,
                12.6f, -2.8f, -12.8f, -0.1f,
                -12.8f, -6.4f, -12.7f, 12.7f,
                -12.1f, -12.8f, -11.9f, -12.8f
            },
            ngraph::element::f32
        },
    },
    {
        Shape{2, 2, 2, 2},
        LayerTransformation::createParamsU8I8(),
        true,
        false,
        {
            {
                1, 0, 77, 125,
                254, 100, 0, 127,
                0, 64, 1, 255,
                7, 0, 9, 0
            },
            ngraph::element::u8,
            { 256ul, {}, { 0.f }, { 255.f }, { -128.f }, { 127.f } },
            ngraph::element::i8
        },
        {
            {
                -127, -128, -51, -3,
                126, -28, -128, -1,
                -128, -64, -127, 127,
                -121, -128, -119, -128
            },
            ngraph::element::i8
        },
    },
};

INSTANTIATE_TEST_CASE_P(
    smoke_LPT,
    FoldFakeQuantizeInTransformations,
    ::testing::ValuesIn(testValues),
    FoldFakeQuantizeInTransformations::getTestCaseName);
