#
# Copyright (c) 2025 Huawei Technologies Co., Ltd. All Rights Reserved.
# Copyright 2023 The vLLM team.
#
# Licensed 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.
# This file is a part of the vllm-ascend project.
# Adapted from vllm-project/vllm/blob/main/tests/models/utils.py
#

from typing import Dict, List, Optional, Sequence, Tuple, Union

from vllm_ascend.utils import vllm_version_is

if vllm_version_is("0.10.2"):
    from vllm.sequence import PromptLogprobs, SampleLogprobs
else:
    from vllm.logprobs import PromptLogprobs, SampleLogprobs

TokensText = Tuple[List[int], str]


def check_outputs_equal(
    *,
    outputs_0_lst: Sequence[TokensText],
    outputs_1_lst: Sequence[TokensText],
    name_0: str,
    name_1: str,
):
    """
    Compare the two sequences generated by different models,
    which should be equal.
    """
    assert len(outputs_0_lst) == len(outputs_1_lst)

    for prompt_idx, (outputs_0,
                     outputs_1) in enumerate(zip(outputs_0_lst,
                                                 outputs_1_lst)):
        output_ids_0, output_str_0 = outputs_0
        output_ids_1, output_str_1 = outputs_1

        # The text and token outputs should exactly match
        fail_msg = (f"Test{prompt_idx}:"
                    f"\n{name_0}:\t{output_str_0!r}"
                    f"\n{name_1}:\t{output_str_1!r}")

        assert output_str_0 == output_str_1, fail_msg
        assert output_ids_0 == output_ids_1, fail_msg


# Representation of generated sequence as a tuple of
# * Token ID list
# * String
# * List of top sample logprobs for each sampled token
#
# Assumes prompt logprobs were not requested.
TokensTextLogprobs = Tuple[List[int], str, Optional[Union[List[Dict[int,
                                                                    float]],
                                                          SampleLogprobs]]]

# Representation of generated sequence as a tuple of
# * Token ID list
# * String
# * Optional list of top sample logprobs for each sampled token
# * Optional list of top prompt logprobs for each prompt token
#
# Allows prompt logprobs to be requested.
TokensTextLogprobsPromptLogprobs = Tuple[
    List[int], str, Optional[Union[List[Dict[int, float]], SampleLogprobs]],
    Optional[Union[List[Optional[Dict[int, float]]], PromptLogprobs]]]
