# ruff: noqa: PGH004, G004, F403
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"""
Unit tests for _pycute.complement
"""

import logging

from torch.distributed._pycute import *
from torch.testing._internal.common_utils import run_tests, TestCase


_LOGGER = logging.getLogger(__name__)


class TestComplement(TestCase):
    def helper_test_complement(self, layout):
        layoutR = complement(layout)

        _LOGGER.debug(f"{layout}  =>  {layoutR}")

        # Post-condition: test disjointness of the codomains
        for a in range(size(layout)):
            for b in range(size(layoutR)):
                assert (layout(a) != layoutR(b)) or (layout(a) == 0 and layoutR(b) == 0)

    def test_complement(self):
        test = Layout(1, 0)
        self.helper_test_complement(test)

        test = Layout(1, 1)
        self.helper_test_complement(test)

        test = Layout(4, 0)
        self.helper_test_complement(test)

        test = Layout((2, 4), (1, 2))
        self.helper_test_complement(test)

        test = Layout((2, 3), (1, 2))
        self.helper_test_complement(test)

        test = Layout((2, 4), (1, 4))
        self.helper_test_complement(test)

        test = Layout((2, 4, 8), (8, 1, 64))
        self.helper_test_complement(test)

        test = Layout(((2, 2), (2, 2)), ((1, 4), (8, 32)))
        self.helper_test_complement(test)

        test = Layout((2, (3, 4)), (3, (1, 6)))
        self.helper_test_complement(test)

        test = Layout((4, 6), (1, 6))
        self.helper_test_complement(test)

        test = Layout((4, 10), (1, 10))
        self.helper_test_complement(test)


if __name__ == "__main__":
    run_tests()