"""
Tests assertion methods.
"""

import os

import grass.script.core as gcore
from grass.pygrass.modules import Module

from grass.gunittest.case import TestCase
from grass.gunittest.main import test
from grass.gunittest.gmodules import SimpleModule


class TestTextAssertions(TestCase):
    # pylint: disable=R0904

    std_newline = "aaa\nbbb\n"
    platfrom_newline = "aaa{nl}bbb{nl}".format(nl=os.linesep)

    def test_assertLooksLike(self):
        self.assertLooksLike("Generated map is <elevation>", "Generated map is <...>")
        self.assertRaises(
            self.failureException,
            self.assertLooksLike,
            "Generated map is elevation.",
            "Generated map is <...>",
        )
        self.assertLooksLike(
            "Projection string: '+proj=longlat +datum=WGS84'", "Projection string: ..."
        )

    def test_assertLooksLike_multiline(self):
        self.assertLooksLike("a=123\nb=456\nc=789", "a=...\nb=...\nc=...")

    def test_assertLooksLike_multiline_platform_dependent(self):
        self.assertLooksLike(
            "a=123\nb=456\nc=789", "a=...{nl}b=...{nl}c=...".format(nl=os.linesep)
        )

    def test_assertLooksLike_numbers(self):
        self.assertLooksLike("abc = 125521", "abc = 125...")
        self.assertLooksLike("abc = 689.156", "abc = 689...")
        self.assertLooksLike("abc = 689.159589", "abc = 689.15...")
        # this should fail according to the implementation
        # first three dots are considered as ellipses
        self.assertRaises(
            self.failureException,
            self.assertLooksLike,
            "abc = 689.159589",
            "abc = 689....",
        )

    def do_all_combidnations(self, first, second, function):
        function(first, first)
        function(first, second)
        function(second, first)
        function(second, second)

    def test_assertMultiLineEqual(self):
        r"""Test different combinations of ``\n`` and os.linesep"""
        self.do_all_combidnations(
            self.std_newline, self.platfrom_newline, function=self.assertMultiLineEqual
        )

    def test_assertMultiLineEqual_raises(self):
        """Test mixed line endings"""
        self.assertRaises(
            self.failureException,
            self.assertMultiLineEqual,
            "aaa\n\rbbb\r",
            "aaa\nbbb\n",
        )

    def test_assertEqual(self):
        """Test for of newlines for strings (uses overwritten assertMultiLineEqual())"""
        self.do_all_combidnations(
            self.std_newline, self.platfrom_newline, function=self.assertEqual
        )

    def test_assertEqual_raises(self):
        """Test mixed line endings"""
        self.assertRaises(
            self.failureException, self.assertEqual, "aaa\n\rbbb\r", "aaa\nbbb\n"
        )


R_UNIVAR_ELEVATION_SUBSET = """n=2025000
null_cells=0
min=55.5787925720215
max=156.329864501953
"""

RANDOM_KEYVALUES = """abc=2025000
aaa=55.5787925720215
bbb=156.329864501953
"""

R_INFO_ELEVATION_SUBSET = """rows=1350
cols=1500
cells=2025000
datatype=FCELL
"""

# r.info -gre map=elevation
ELEVATION_MAPSET_DICT = {"mapset": "PERMANENT"}

# r.univar map=elevation
ELEVATION_MINMAX = """min=55.5787925720215
max=156.329864501953
"""

# values rounded manually to maximal expected perecision
ELEVATION_MINMAX_DICT = {"min": 55.58, "max": 156.33}


class TestAssertModuleKeyValue(TestCase):
    """Test usage of `assertModuleKeyValue` method."""

    # pylint: disable=R0904

    @classmethod
    def setUpClass(cls):
        cls.use_temp_region()
        cls.runModule(SimpleModule("g.region", raster="elevation"))

    @classmethod
    def tearDownClass(cls):
        cls.del_temp_region()

    def test_pygrass_module(self):
        """Test syntax with Module and required parameters as module"""
        module = Module("r.info", map="elevation", flags="gr", run_=False, finish_=True)
        self.assertModuleKeyValue(
            module, reference=dict(min=55.58, max=156.33), precision=0.01, sep="="
        )

    def test_pygrass_simple_module(self):
        """Test syntax with SimpleModule as module"""
        module = SimpleModule("r.info", map="elevation", flags="gr")
        self.assertModuleKeyValue(
            module, reference=dict(min=55.58, max=156.33), precision=0.01, sep="="
        )

    def test_direct_parameters(self):
        """Test syntax with module and its parameters as function parameters"""
        self.assertModuleKeyValue(
            "r.info",
            map="elevation",
            flags="gr",
            reference=dict(min=55.58, max=156.33),
            precision=0.01,
            sep="=",
        )

    def test_parameters_parameter(self):
        """Test syntax with module parameters in one parameters dictionary"""
        self.assertModuleKeyValue(
            module="r.info",
            parameters=dict(map="elevation", flags="gr"),
            reference=dict(min=55.58, max=156.33),
            precision=0.01,
            sep="=",
        )


class TestRasterMapAssertions(TestCase):
    # pylint: disable=R0904

    @classmethod
    def setUpClass(cls):
        cls.use_temp_region()
        # TODO: here we should actually not call self.runModule but call_module
        cls.runModule(SimpleModule("g.region", raster="elevation"))

    @classmethod
    def tearDownClass(cls):
        cls.del_temp_region()

    def test_assertRasterFitsUnivar(self):
        self.assertRasterFitsUnivar(
            "elevation", R_UNIVAR_ELEVATION_SUBSET, precision=0.01
        )
        self.assertRaises(
            self.failureException,
            self.assertRasterFitsUnivar,
            "geology",
            R_UNIVAR_ELEVATION_SUBSET,
            precision=0.01,
        )
        self.assertRaises(
            ValueError, self.assertRasterFitsUnivar, "elevation", RANDOM_KEYVALUES
        )

    def test_assertRasterFitsInfo(self):
        self.assertRasterFitsInfo("elevation", R_INFO_ELEVATION_SUBSET)
        self.assertRaises(
            self.failureException,
            self.assertRasterFitsInfo,
            "geology",
            R_INFO_ELEVATION_SUBSET,
        )
        self.assertRaises(
            ValueError, self.assertRasterFitsInfo, "elevation", RANDOM_KEYVALUES
        )

    def test_common_values_info_univar(self):
        self.assertRasterFitsUnivar("elevation", ELEVATION_MINMAX, precision=0.01)
        self.assertRasterFitsInfo("elevation", ELEVATION_MINMAX, precision=0.01)

    def test_dict_as_parameter(self):
        """This also tests if we are using r.info -e flag and that precision is
        not required for strings.
        """
        self.assertRasterFitsInfo("elevation", ELEVATION_MAPSET_DICT)

    def test_assertRastersNoDifference(self):
        """Test basic usage of assertRastersNoDifference"""
        self.assertRastersNoDifference(
            actual="elevation",
            reference="elevation",
            precision=0,  # this might need to be increased
            msg="The same maps should have no difference",
        )
        self.assertRaises(
            self.failureException,
            self.assertRastersNoDifference,
            actual="elevation",
            reference="geology",
            precision=1,
            msg="Different maps should have difference",
        )

    def test_assertRastersNoDifference_mean(self):
        """Test usage of assertRastersNoDifference with mean"""
        self.assertRastersNoDifference(
            actual="elevation",
            reference="elevation",
            precision=0,  # this might need to be increased
            statistics=dict(mean=0),
            msg="The difference of same maps should have small mean",
        )
        self.assertRaises(
            self.failureException,
            self.assertRastersNoDifference,
            actual="elevation",
            reference="geology",
            precision=1,
            statistics=dict(mean=0),
            msg="The difference of different maps should have huge mean",
        )

    def test_assertRastersEqual(self):
        """Test basic usage of assertRastersEqual"""
        self.assertRastersEqual(
            actual="lakes",
            reference="lakes",
            precision=0,
            msg="The same maps should have no difference",
        )
        self.assertRaises(
            self.failureException,
            self.assertRastersEqual,
            actual="elevation",
            reference="lakes",
            precision=1,
            msg="Different maps should have difference",
        )


class TestMapExistsAssertions(TestCase):
    # pylint: disable=R0904

    raster_cell = "TestMapExistsAssertions_raster_cell"
    raster_dcell = "TestMapExistsAssertions_raster_dcell"
    raster3d = "TestMapExistsAssertions_raster3D"
    vector = "TestMapExistsAssertions_vector"

    @classmethod
    def setUpClass(cls):
        cls.use_temp_region()
        cls.runModule("g.region", n=10, e=10, s=0, w=0, t=10, b=0, res=1)
        cls.runModule("r.mapcalc", expression=cls.raster_cell + " = 1")
        cls.runModule("r.mapcalc", expression=cls.raster_dcell + " = 1.0")
        cls.runModule("r3.mapcalc", expression=cls.raster3d + " = 1.0")
        cls.runModule("v.edit", map=cls.vector, tool="create")

    @classmethod
    def tearDownClass(cls):
        cls.runModule(
            "g.remove",
            flags="f",
            type=["raster", "raster3d", "vector"],
            name=[cls.raster_cell, cls.raster_dcell, cls.raster3d, cls.vector],
        )
        cls.del_temp_region()

    def test_rast_cell_exists(self):
        self.assertRasterExists(self.raster_cell)

    def test_rast_dcell_exists(self):
        self.assertRasterExists(self.raster_dcell)

    def test_rast_does_not_exist(self):
        self.assertRaises(
            self.failureException, self.assertRasterExists, "does_not_exists"
        )

    def test_rast3d_exists(self):
        self.assertRaster3dExists(self.raster3d)

    def test_rast3d_does_not_exist(self):
        self.assertRaises(
            self.failureException, self.assertRaster3dExists, "does_not_exists"
        )

    def test_vect_exists(self):
        self.assertVectorExists(self.vector)

    def test_vect_does_not_exist(self):
        self.assertRaises(
            self.failureException, self.assertVectorExists, "does_not_exists"
        )

    def test_rast_does_not_exist_in_current_mapset(self):
        # expecting that there is elevation in PERMANENT
        # TODO: use skip decorator
        # TODO: add the same tests but for vect and rast3d
        self.assertRaises(
            self.failureException,
            self.assertRasterExists,
            "elevation",
            msg="Rasters from different mapsets should be ignored",
        )


class TestFileAssertions(TestCase):
    # pylint: disable=R0904

    @classmethod
    def setUpClass(cls):
        # we expect WIND to be always present
        gisenv = gcore.gisenv()
        cls.existing_file = os.path.join(
            gisenv["GISDBASE"], gisenv["LOCATION_NAME"], "PERMANENT", "WIND"
        )
        cls.emtpy_file = cls.__name__ + "_this_is_an_empty_file"
        open(cls.emtpy_file, "w").close()
        cls.file_with_md5 = cls.__name__ + "_this_is_a_file_with_known_md5"
        file_content = "Content of the file with known MD5.\n"
        with open(cls.file_with_md5, "w") as f:
            f.write(file_content)
        # MD5 sum created using:
        # echo 'Content of the file with known MD5.' > some_file.txt
        # md5sum some_file.txt
        cls.file_md5 = "807bba4ffac4bb351bc3f27853009949"

        cls.file_with_same_content = cls.__name__ + "_file_with_same_content"
        with open(cls.file_with_same_content, "w") as f:
            f.write(file_content)

        cls.file_with_different_content = cls.__name__ + "_file_with_different_content"
        with open(cls.file_with_different_content, "w") as f:
            f.write(file_content + " Something else here.")

    @classmethod
    def tearDownClass(cls):
        os.remove(cls.emtpy_file)
        os.remove(cls.file_with_md5)
        os.remove(cls.file_with_same_content)
        os.remove(cls.file_with_different_content)

    def test_assertFileExists(self):
        self.assertFileExists(filename=self.existing_file)
        self.assertRaises(
            self.failureException,
            self.assertFileExists,
            filename="this_one_does_not_exists",
        )

    def test_assertFileExists_empty_file(self):
        self.assertFileExists(filename=self.emtpy_file, skip_size_check=True)
        self.assertRaises(
            self.failureException, self.assertFileExists, filename=self.emtpy_file
        )

    def test_assertFileMd5(self):
        self.assertFileMd5(filename=self.file_with_md5, md5=self.file_md5)
        self.assertRaises(
            self.failureException,
            self.assertFileMd5,
            filename=self.file_with_md5,
            md5="wrongmd5",
        )

    def test_assertFilesEqualMd5(self):
        self.assertFilesEqualMd5(
            filename=self.file_with_md5, reference=self.file_with_same_content
        )
        self.assertRaises(
            self.failureException,
            self.assertFilesEqualMd5,
            filename=self.file_with_md5,
            reference=self.file_with_different_content,
        )


if __name__ == "__main__":
    test()
