"""
Test of r3.gradient

@author Anna Petrasova
"""
from grass.gunittest.case import TestCase
from grass.gunittest.main import test


r3univar_test_grad_x = """
n=600
null_cells=0
cells=600
min=0.00902566899999995
max=0.0993248405000001
range=0.0902991715000001
mean=0.0641879624599999
mean_of_abs=0.0641879624599999
stddev=0.0243482677445681
variance=0.000592838142161176
coeff_var=37.9327631091908
sum=38.512777476
"""


r3univar_test_grad_y = """
n=600
null_cells=0
cells=600
min=-0.0990409449999998
max=-0.00774536350000012
range=0.0912955814999997
mean=-0.0563959154616667
mean_of_abs=0.0563959154616667
stddev=0.0244377519801364
variance=0.000597203721842658
coeff_var=-43.3324856597942
sum=-33.837549277"""


r3univar_test_grad_z = """
n=600
null_cells=0
cells=600
min=0.00643308800000026
max=0.0967259644999999
range=0.0902928764999997
mean=0.0336457494116667
mean_of_abs=0.0336457494116667
stddev=0.0186882020765464
variance=0.000349248896853835
coeff_var=55.5440208743464
sum=20.187449647
"""

r3univar_test_nulls_grad_x = """
n=107
null_cells=18
cells=125
min=0
max=10
range=10
mean=3.70093457943925
mean_of_abs=3.70093457943925
stddev=3.6357902977452
variance=13.2189710891781
coeff_var=98.2397883481656
sum=396
"""

r3univar_test_nulls_grad_y = """
n=107
null_cells=18
cells=125
min=-10
max=0
range=10
mean=-3.70093457943925
mean_of_abs=3.70093457943925
stddev=3.6357902977452
variance=13.2189710891781
coeff_var=-98.2397883481656
sum=-396
"""

r3univar_test_nulls_grad_z = """
n=107
null_cells=18
cells=125
min=0
max=10
range=10
mean=3.70093457943925
mean_of_abs=3.70093457943925
stddev=3.6357902977452
variance=13.2189710891781
coeff_var=98.2397883481656
sum=396
"""


class GradientTest(TestCase):
    @classmethod
    def setUpClass(cls):
        """Use temporary region settings"""
        cls.use_temp_region()
        cls.runModule("g.region", res3=10, n=100, s=0, w=0, e=120, b=0, t=50)
        cls.runModule("r3.in.ascii", input="data/test_map_1", output="test_map_1_ref")
        cls.runModule("g.region", res3=1, n=5, s=0, w=0, e=5, b=0, t=5)
        cls.runModule("r3.in.ascii", input="data/test_map_2", output="test_map_2_ref")

    @classmethod
    def tearDownClass(cls):
        """!Remove the temporary region"""
        cls.del_temp_region()
        cls.runModule(
            "g.remove",
            flags="f",
            type="raster_3d",
            name=",".join(
                [
                    "test_map_1_ref",
                    "test_map_2_ref",
                    "test_grad_x",
                    "test_grad_y",
                    "test_grad_z",
                    "test_null_grad_x",
                    "test_null_grad_y",
                    "test_null_grad_z",
                ]
            ),
        )

    def test_gradient_runs(self):
        self.runModule("g.region", res3=10, n=100, s=0, w=0, e=120, b=0, t=50)
        self.assertModuleFail(
            "r3.gradient",
            input="test_map_1_ref",
            output=["test_grad_x", "test_grad_y"],
            overwrite=True,
        )
        self.assertModule(
            "r3.gradient",
            input="test_map_1_ref",
            output=["test_grad_x", "test_grad_y", "test_grad_z"],
            overwrite=True,
        )

    def test_gradient(self):
        self.runModule("g.region", res3=10, n=100, s=0, w=0, e=120, b=0, t=50)
        self.runModule(
            "r3.gradient",
            input="test_map_1_ref",
            output=["test_grad_x", "test_grad_y", "test_grad_z"],
            overwrite=True,
        )
        self.assertRaster3dFitsUnivar(
            raster="test_grad_x", reference=r3univar_test_grad_x, precision=1e-8
        )
        self.assertRaster3dFitsUnivar(
            raster="test_grad_y", reference=r3univar_test_grad_y, precision=1e-8
        )
        self.assertRaster3dFitsUnivar(
            raster="test_grad_z", reference=r3univar_test_grad_z, precision=1e-8
        )

    def test_gradient_block(self):
        self.runModule("g.region", res3=10, n=100, s=0, w=0, e=120, b=0, t=50)
        self.assertModule(
            "r3.gradient",
            input="test_map_1_ref",
            blocksize=[200, 2, 50],
            output=["test_grad_x", "test_grad_y", "test_grad_z"],
            overwrite=True,
        )
        self.assertRaster3dFitsUnivar(
            raster="test_grad_x", reference=r3univar_test_grad_x, precision=1e-8
        )
        self.assertRaster3dFitsUnivar(
            raster="test_grad_y", reference=r3univar_test_grad_y, precision=1e-8
        )
        self.assertRaster3dFitsUnivar(
            raster="test_grad_z", reference=r3univar_test_grad_z, precision=1e-8
        )

    def test_gradient_nulls(self):
        self.runModule("g.region", res3=1, n=5, s=0, w=0, e=5, b=0, t=5)
        self.assertModule(
            "r3.gradient",
            input="test_map_2_ref",
            blocksize=[200, 2, 50],
            output=["test_null_grad_x", "test_null_grad_y", "test_null_grad_z"],
        )
        self.assertRaster3dFitsUnivar(
            raster="test_null_grad_x",
            reference=r3univar_test_nulls_grad_x,
            precision=1e-8,
        )
        self.assertRaster3dFitsUnivar(
            raster="test_null_grad_y",
            reference=r3univar_test_nulls_grad_y,
            precision=1e-8,
        )
        self.assertRaster3dFitsUnivar(
            raster="test_null_grad_z",
            reference=r3univar_test_nulls_grad_z,
            precision=1e-8,
        )


if __name__ == "__main__":
    test()