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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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# specific language governing permissions and limitations
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import pytest
import tvm_ffi
from tvm_ffi.access_path import AccessPath

import tvm
import tvm.testing
from tvm.ir.base import get_first_structural_mismatch


def get_first_mismatch_ensure_symmetry(a, b):
    mismatch = get_first_structural_mismatch(a, b)
    mismatch_swapped = get_first_structural_mismatch(b, a)

    if mismatch is None and mismatch_swapped is None:
        return None

    if (
        mismatch is None
        or mismatch_swapped is None
        or mismatch[0] != mismatch_swapped[1]
        or mismatch[1] != mismatch_swapped[0]
    ):
        raise AssertionError(
            "get_first_structural_mismatch(a, b) and get_first_structural_mismatch(b, a) returned"
            f" inconsistent results '{mismatch}' and '{mismatch_swapped}' for a='{a}', b='{b}'"
        )

    a_path, b_path = mismatch
    b_path_swapped, a_path_swapped = mismatch_swapped
    assert a_path == a_path_swapped
    assert b_path == b_path_swapped

    return mismatch


@pytest.mark.parametrize(
    "a, b, expected_a_path, expected_b_path",
    [
        (
            [1, 2, 3],
            [1, 4, 3],
            AccessPath.root().array_item(1),
            AccessPath.root().array_item(1),
        ),
        (
            [1, 2, 3],
            [10, 2, 30],
            AccessPath.root().array_item(0),
            AccessPath.root().array_item(0),
        ),
        (
            [1, 3, 4],
            [1, 2, 3, 4],
            AccessPath.root().array_item(1),
            AccessPath.root().array_item(1),
        ),
        (
            [1, 2, 3],
            [1, 2, 3, 4],
            AccessPath.root().array_item_missing(3),
            AccessPath.root().array_item(3),
        ),
        (
            [],
            [1],
            AccessPath.root().array_item_missing(0),
            AccessPath.root().array_item(0),
        ),
    ],
)
def test_array_structural_mismatch(a, b, expected_a_path, expected_b_path):
    a = tvm.runtime.convert(a)
    b = tvm.runtime.convert(b)
    a_path, b_path = get_first_mismatch_ensure_symmetry(a, b)
    assert a_path == expected_a_path
    assert b_path == expected_b_path


@pytest.mark.parametrize(
    "contents",
    [
        [],
        [1],
        [1, 2, 3],
    ],
)
def test_array_structural_equal_to_self(contents):
    a = tvm.runtime.convert(list(contents))
    b = tvm.runtime.convert(list(contents))
    assert get_first_mismatch_ensure_symmetry(a, b) is None


@pytest.mark.parametrize(
    "contents",
    [
        [],
        [1],
        [1, 2, 3],
    ],
)
def test_shape_tuple_structural_equal_to_self(contents):
    a = tvm_ffi.Shape(list(contents))
    b = tvm_ffi.Shape(list(contents))
    assert get_first_mismatch_ensure_symmetry(a, b) is None


@pytest.mark.parametrize(
    "contents",
    [
        {},
        {"a": 1, "b": 2},
        {"a": True, "b": False},
    ],
)
def test_string_map_structural_equal_to_self(contents):
    a = tvm.runtime.convert({**contents})
    b = tvm.runtime.convert({**contents})
    assert get_first_mismatch_ensure_symmetry(a, b) is None


@pytest.mark.parametrize(
    "a, b, expected_a_path, expected_b_path",
    [
        (
            dict(a=3, b=4),
            dict(a=3, b=5),
            AccessPath.root().map_item("b"),
            AccessPath.root().map_item("b"),
        ),
        (
            dict(a=3, b=4),
            dict(a=3, b=4, c=5),
            AccessPath.root().map_item_missing("c"),
            AccessPath.root().map_item("c"),
        ),
    ],
)
def test_string_map_structural_mismatch(a, b, expected_a_path, expected_b_path):
    a = tvm.runtime.convert(a)
    b = tvm.runtime.convert(b)
    a_path, b_path = get_first_mismatch_ensure_symmetry(a, b)
    assert a_path == expected_a_path
    assert b_path == expected_b_path


@pytest.mark.parametrize(
    "contents",
    [
        dict(),
        dict(a=1),
        dict(a=3, b=4, c=5),
    ],
)
def test_string_structural_equal_to_self(contents):
    a = tvm.runtime.convert(dict(contents))
    b = tvm.runtime.convert(dict(contents))
    assert get_first_mismatch_ensure_symmetry(a, b) is None


if __name__ == "__main__":
    tvm.testing.main()