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#define OUTPUT_SAVING 0
#if OUTPUT_SAVING
#define SAVE(x) std::vector<int> params;\
                params.push_back(16);\
                params.push_back(0);\
                imwrite(folder + "output.png", x ,params);
#else
#define SAVE(x)
#endif

#include "test_precomp.hpp"
#include "opencv2/photo.hpp"
#include <string>

using namespace cv;
using namespace std;

static const double numerical_precision = 1000.;

TEST(Photo_SeamlessClone_normal, regression)
{
    string folder = string(cvtest::TS::ptr()->get_data_path()) + "cloning/Normal_Cloning/";
    string original_path1 = folder + "source1.png";
    string original_path2 = folder + "destination1.png";
    string original_path3 = folder + "mask.png";
    string reference_path = folder + "reference.png";

    Mat source = imread(original_path1, IMREAD_COLOR);
    Mat destination = imread(original_path2, IMREAD_COLOR);
    Mat mask = imread(original_path3, IMREAD_COLOR);

    ASSERT_FALSE(source.empty()) << "Could not load source image " << original_path1;
    ASSERT_FALSE(destination.empty()) << "Could not load destination image " << original_path2;
    ASSERT_FALSE(mask.empty()) << "Could not load mask image " << original_path3;

    Mat result;
    Point p;
    p.x = destination.size().width/2;
    p.y = destination.size().height/2;
    seamlessClone(source, destination, mask, p, result, 1);

    Mat reference = imread(reference_path);
    ASSERT_FALSE(reference.empty()) << "Could not load reference image " << reference_path;

    SAVE(result);

    double error = cvtest::norm(reference, result, NORM_L1);
    EXPECT_LE(error, numerical_precision);
}

TEST(Photo_SeamlessClone_mixed, regression)
{
    string folder = string(cvtest::TS::ptr()->get_data_path()) + "cloning/Mixed_Cloning/";
    string original_path1 = folder + "source1.png";
    string original_path2 = folder + "destination1.png";
    string original_path3 = folder + "mask.png";
    string reference_path = folder + "reference.png";

    Mat source = imread(original_path1, IMREAD_COLOR);
    Mat destination = imread(original_path2, IMREAD_COLOR);
    Mat mask = imread(original_path3, IMREAD_COLOR);

    ASSERT_FALSE(source.empty()) << "Could not load source image " << original_path1;
    ASSERT_FALSE(destination.empty()) << "Could not load destination image " << original_path2;
    ASSERT_FALSE(mask.empty()) << "Could not load mask image " << original_path3;

    Mat result;
    Point p;
    p.x = destination.size().width/2;
    p.y = destination.size().height/2;
    seamlessClone(source, destination, mask, p, result, 2);

    SAVE(result);

    Mat reference = imread(reference_path);
    ASSERT_FALSE(reference.empty()) << "Could not load reference image " << reference_path;

    double error = cvtest::norm(reference, result, NORM_L1);
    EXPECT_LE(error, numerical_precision);

}

TEST(Photo_SeamlessClone_featureExchange, regression)
{
    string folder = string(cvtest::TS::ptr()->get_data_path()) + "cloning/Monochrome_Transfer/";
    string original_path1 = folder + "source1.png";
    string original_path2 = folder + "destination1.png";
    string original_path3 = folder + "mask.png";
    string reference_path = folder + "reference.png";

    Mat source = imread(original_path1, IMREAD_COLOR);
    Mat destination = imread(original_path2, IMREAD_COLOR);
    Mat mask = imread(original_path3, IMREAD_COLOR);

    ASSERT_FALSE(source.empty()) << "Could not load source image " << original_path1;
    ASSERT_FALSE(destination.empty()) << "Could not load destination image " << original_path2;
    ASSERT_FALSE(mask.empty()) << "Could not load mask image " << original_path3;

    Mat result;
    Point p;
    p.x = destination.size().width/2;
    p.y = destination.size().height/2;
    seamlessClone(source, destination, mask, p, result, 3);

    SAVE(result);

    Mat reference = imread(reference_path);
    ASSERT_FALSE(reference.empty()) << "Could not load reference image " << reference_path;

    double error = cvtest::norm(reference, result, NORM_L1);
    EXPECT_LE(error, numerical_precision);

}

TEST(Photo_SeamlessClone_colorChange, regression)
{
    string folder = string(cvtest::TS::ptr()->get_data_path()) + "cloning/color_change/";
    string original_path1 = folder + "source1.png";
    string original_path2 = folder + "mask.png";
    string reference_path = folder + "reference.png";

    Mat source = imread(original_path1, IMREAD_COLOR);
    Mat mask = imread(original_path2, IMREAD_COLOR);

    ASSERT_FALSE(source.empty()) << "Could not load source image " << original_path1;
    ASSERT_FALSE(mask.empty()) << "Could not load mask image " << original_path2;

    Mat result;
    colorChange(source, mask, result, 1.5, .5, .5);

    SAVE(result);

    Mat reference = imread(reference_path);
    ASSERT_FALSE(reference.empty()) << "Could not load reference image " << reference_path;

    double error = cvtest::norm(reference, result, NORM_L1);
    EXPECT_LE(error, numerical_precision);

}

TEST(Photo_SeamlessClone_illuminationChange, regression)
{
    string folder = string(cvtest::TS::ptr()->get_data_path()) + "cloning/Illumination_Change/";
    string original_path1 = folder + "source1.png";
    string original_path2 = folder + "mask.png";
    string reference_path = folder + "reference.png";

    Mat source = imread(original_path1, IMREAD_COLOR);
    Mat mask = imread(original_path2, IMREAD_COLOR);

    ASSERT_FALSE(source.empty()) << "Could not load source image " << original_path1;
    ASSERT_FALSE(mask.empty()) << "Could not load mask image " << original_path2;

    Mat result;
    illuminationChange(source, mask, result, 0.2f, 0.4f);

    SAVE(result);

    Mat reference = imread(reference_path);
    double error = cvtest::norm(reference, result, NORM_L1);
    EXPECT_LE(error, numerical_precision);

}

TEST(Photo_SeamlessClone_textureFlattening, regression)
{
    string folder = string(cvtest::TS::ptr()->get_data_path()) + "cloning/Texture_Flattening/";
    string original_path1 = folder + "source1.png";
    string original_path2 = folder + "mask.png";
    string reference_path = folder + "reference.png";

    Mat source = imread(original_path1, IMREAD_COLOR);
    Mat mask = imread(original_path2, IMREAD_COLOR);

    ASSERT_FALSE(source.empty()) << "Could not load source image " << original_path1;
    ASSERT_FALSE(mask.empty()) << "Could not load mask image " << original_path2;

    Mat result;
    textureFlattening(source, mask, result, 30, 45, 3);

    SAVE(result);

    Mat reference = imread(reference_path);
    ASSERT_FALSE(reference.empty()) << "Could not load reference image " << reference_path;

    double error = cvtest::norm(reference, result, NORM_L1);
    EXPECT_LE(error, numerical_precision);

}