#!/usr/bin/env python3
# coding: utf-8
# Copyright (c) 2026 Huawei Technologies Co., Ltd.
# This program is free software, you can redistribute it and/or modify it under the terms and conditions of
# CANN Open Software License Agreement Version 2.0 (the "License").
# Please refer to the License for details. You may not use this file except in compliance with the License.
# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
# See LICENSE in the root of the software repository for the full text of the License.
# -----------------------------------------------------------------------------------------------------------
"""
"""
import os
import math
import pypto
import pytest
from numpy.testing import assert_allclose
import torch
import torch_npu


def test_erf_onboard():
    device_id = int(os.environ.get('TILE_FWK_DEVICE_ID', 0))
    torch.npu.set_device(device_id)
    shape = (72, 71)
    view_shape = (32, 32)
    tile_shape = (32, 32)
    pypto.runtime._device_init()

    # 将数据类型改为 DT_FP32
    input1 = pypto.tensor(shape, pypto.DT_FP32, "PTO_TENSOR_input1")
    output = pypto.tensor(shape, pypto.DT_FP32, "PTO_TENSOR_output")

    b_loop_num = math.ceil(shape[0] / view_shape[0])
    s_loop_num = math.ceil(shape[1] / view_shape[1])
    with pypto.function("MAIN", input1, output):
        for b_idx in pypto.loop(b_loop_num, name="b0", idx_name="bidx"):
            for s_idx in pypto.loop(s_loop_num, name="s0", idx_name="sidx"):
                view_tensor_a = pypto.view(input1, view_shape,
                                         [b_idx * view_shape[0],
                                             s_idx * view_shape[1]],
                                         valid_shape=[
                                             pypto.min(pypto.symbolic_scalar(shape[0]) - b_idx * view_shape[0],
                                                     pypto.symbolic_scalar(view_shape[0])),
                                             pypto.min(pypto.symbolic_scalar(shape[1]) - s_idx * view_shape[1],
                                                     pypto.symbolic_scalar(view_shape[1])),
                                         ],
                                         )
                pypto.set_vec_tile_shapes(tile_shape[0], tile_shape[1])
                # 使用 erf 操作
                view_tensor_a = pypto.erf(view_tensor_a)
                pypto.assemble(view_tensor_a, [
                             b_idx * view_shape[0], s_idx * view_shape[1]], output)

    assert isinstance(output, pypto.tensor)

    # 将torch tensor的类型也改为FP32
    a_tensor = torch.randint(
        low=-100, high=100, size=[shape[0], shape[1]], dtype=torch.float32)
    b_tensor = torch.zeros(shape[0], shape[1], dtype=torch.float32)
    pto_a_tensor = pypto.from_torch(a_tensor, "a_tensor")
    pto_b_tensor = pypto.from_torch(b_tensor, "b_tensor")
    pypto.runtime._device_run_once_data_from_host(pto_a_tensor, pto_b_tensor)

    # 使用 torch.erf 作为参考结果
    golden = torch.erf(a_tensor)
    assert_allclose(b_tensor.flatten(), golden.flatten(), rtol=3e-3, atol=3e-3)
    pypto.runtime._device_fini()