# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# 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
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
# ruff: noqa: F841

import pytest
from tvm_ffi.access_path import AccessPath

import tvm
from tvm.ir import assert_structural_equal
from tvm.script import ir as I
from tvm.script import tirx as T


def _error_message(exception):
    return str(exception)


def _expected_result(func1, func2, objpath1, objpath2):
    return f"""StructuralEqual check failed, caused by lhs at {objpath1}:
{func1.script(path_to_underline=[objpath1], syntax_sugar=False)}
and rhs at {objpath2}:
{func2.script(path_to_underline=[objpath2], syntax_sugar=False)}"""


def test_prim_type_hidden_path_exact_message():
    with pytest.raises(ValueError) as exc_info:
        assert_structural_equal(tvm.ir.PrimType("int32"), tvm.ir.PrimType("float32"))

    assert str(exc_info.value) == (
        "StructuralEqual check failed, caused by lhs at <root>.dtype:\n"
        "Access path: <root>.dtype\n"
        "Note: The underlined object is the nearest visible parent of this path.\n\n"
        "T.int32\n"
        "^^^^^^^\n"
        "and rhs at <root>.dtype:\n"
        "Access path: <root>.dtype\n"
        "Note: The underlined object is the nearest visible parent of this path.\n\n"
        "T.float32\n"
        "^^^^^^^^^"
    )


def test_prim_func_buffer_map():
    @T.prim_func(s_tir=True)
    def func1(a: T.handle, b: T.handle):
        A = T.match_buffer(a, (128, 128))
        B = T.match_buffer(b, (128, 128))

    @T.prim_func(s_tir=True)
    def func2(a: T.handle, b: T.handle):
        A = T.match_buffer(a, (128, 128))
        B = T.match_buffer(b, (128, 256))

    func1 = func1.with_attr("global_symbol", "main")
    func2 = func2.with_attr("global_symbol", "main")

    with pytest.raises(ValueError) as ve:
        assert_structural_equal(func1, func2)
    assert _error_message(ve.value) == _expected_result(
        func1,
        func2,
        AccessPath.root()
        .attr("buffer_map")
        .map_item(func1.params[1])
        .attr("shape")
        .array_item(1)
        .attr("value"),
        AccessPath.root()
        .attr("buffer_map")
        .map_item(func2.params[1])
        .attr("shape")
        .array_item(1)
        .attr("value"),
    )


def test_evaluate():
    @I.ir_module(s_tir=True)
    class module1:
        @T.prim_func(s_tir=True)
        def func():
            T.evaluate(0)

    @I.ir_module(s_tir=True)
    class module2:
        @T.prim_func(s_tir=True)
        def func():
            T.evaluate(1)

    with pytest.raises(ValueError) as ve:
        assert_structural_equal(module1, module2)
    assert _error_message(ve.value) == _expected_result(
        module1,
        module2,
        AccessPath.root()
        .attr("functions")
        .map_item(module1.get_global_var("func"))
        .attr("body")
        .attr("value")
        .attr("value"),
        AccessPath.root()
        .attr("functions")
        .map_item(module2.get_global_var("func"))
        .attr("body")
        .attr("value")
        .attr("value"),
    )


def test_allocate():
    @T.prim_func(s_tir=True)
    def func1():
        a = T.alloc_buffer((128, 128), dtype="float32")

    @T.prim_func(s_tir=True)
    def func2():
        a = T.alloc_buffer((256, 128), dtype="float32")

    func1 = func1.with_attr("global_symbol", "main")
    func2 = func2.with_attr("global_symbol", "main")

    with pytest.raises(ValueError) as ve:
        assert_structural_equal(func1, func2)

    assert _error_message(ve.value) == _expected_result(
        func1,
        func2,
        AccessPath.root().attr("body").attr("buffer").attr("shape").array_item(0).attr("value"),
        AccessPath.root().attr("body").attr("buffer").attr("shape").array_item(0).attr("value"),
    )


def test_for():
    @T.prim_func(s_tir=True)
    def func1():
        for i, j in T.grid(128, 128):
            with T.sblock():
                pass

    @T.prim_func(s_tir=True)
    def func2():
        for i, j, k in T.grid(128, 128, 128):
            with T.sblock():
                pass

    func1 = func1.with_attr("global_symbol", "main")
    func2 = func2.with_attr("global_symbol", "main")

    with pytest.raises(ValueError) as ve:
        assert_structural_equal(func1, func2)
    assert _error_message(ve.value) == _expected_result(
        func1,
        func2,
        AccessPath.root().attr("body").attr("block").attr("body").attr("body").attr("body"),
        AccessPath.root().attr("body").attr("block").attr("body").attr("body").attr("body"),
    )


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