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#include <pdal/pdal_test_main.hpp>

#include <pdal/StageFactory.hpp>
#include <pdal/private/Raster.hpp>
#include <pdal/private/gdal/Raster.hpp>

#include "Support.hpp"

// NOTE: The test data has an accompanying jpg that depicts the points,
//  their triangulation and the interesting barycentric calculation.

namespace pdal
{

TEST(FaceRasterTest, basic)
{
    Options ro;
    ro.add("filename", Support::datapath("filters/hagtest.txt"));

    StageFactory factory;
    Stage& r = *(factory.createStage("readers.text"));
    r.setOptions(ro);

    Options rngO;
    rngO.add("limits", "Classification[2:2]");
    Stage& rng = *(factory.createStage("filters.range"));
    rng.setOptions(rngO);
    rng.setInput(r);

    Stage& d = *(factory.createStage("filters.delaunay"));
    d.setInput(rng);

    Options fo;
    fo.add("resolution", 1);
    Stage& f = *(factory.createStage("filters.faceraster"));
    f.setInput(d);
    f.setOptions(fo);

    Options wo;
    wo.add("filename", "test.tif");
    Stage& w = *(factory.createStage("writers.raster"));
    w.setInput(f);
    w.setOptions(wo);

    PointTable t1;
    w.prepare(t1);
    PointViewSet s = w.execute(t1);
    PointViewPtr v = *s.begin();

    gdal::Raster raster("test.tif", "GTiff");
    if (raster.open() != gdal::GDALError::None)
        throw pdal_error(raster.errorMsg());
    std::vector<double> data;
    raster.readBand(data, 1);
    int row = 0;
    int col = 0;

    const std::vector<double> expected
    {
        -9999,   10,      -9999,   -9999,   -9999, -9999,
        -9999,   9,       7,       -9999,   -9999, -9999,
        10,      8,       6,       4,       -9999, -9999,
        6.66667, 4.66667, 2.66667, 6,       7,     -9999,
        3.33333, 1.33333, 4.66667, 8,       9,     10,
        0,       3.33333, 6.66667, 10,      -9999, -9999
    };

    size_t size = raster.width() * raster.height();
    for (size_t i = 0; i < size; ++i)
        EXPECT_NEAR(expected[i], data[i], .00001);
}

} // namespace pdal
