# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
from dataclasses import dataclass

import pytest

from tests.models.utils import EmbedModelInfo
from vllm import PoolingParams
from vllm.config import ModelConfig, PoolerConfig

EMBEDDING_MODELS = [
    EmbedModelInfo("intfloat/multilingual-e5-small", is_matryoshka=False),
    EmbedModelInfo(
        "Snowflake/snowflake-arctic-embed-m-v1.5",
        is_matryoshka=True,
        matryoshka_dimensions=[256],
    ),
]

classify_parameters = ["activation"]
embed_parameters = ["dimensions", "normalize"]
step_pooling_parameters = ["step_tag_id", "returned_token_ids"]


@dataclass()
class MockModelConfig:
    pooler_config: PoolerConfig


def test_task():
    pooling_params = PoolingParams()
    pooling_params.verify(task="score")

    pooling_params = PoolingParams(task="score")
    pooling_params.verify(task="score")

    with pytest.raises(ValueError):
        pooling_params.verify(task="classify")


def test_embed():
    task = "embed"
    model_config = MockModelConfig(pooler_config=PoolerConfig(pooling_type="CLS"))

    pooling_params = PoolingParams(normalize=None)
    pooling_params.verify(task=task, model_config=model_config)

    pooling_params = PoolingParams(normalize=True)
    pooling_params.verify(task=task, model_config=model_config)

    pooling_params = PoolingParams(normalize=False)
    pooling_params.verify(task=task, model_config=model_config)

    invalid_parameters = classify_parameters + step_pooling_parameters
    for p in invalid_parameters:
        with pytest.raises(ValueError):
            pooling_params = PoolingParams(**{p: True})
            pooling_params.verify(task=task, model_config=model_config)


@pytest.mark.parametrize("model_info", EMBEDDING_MODELS)
def test_embed_dimensions(model_info: EmbedModelInfo):
    task = "embed"
    model_config = ModelConfig(
        model_info.name,
        task="auto",
        tokenizer=model_info.name,
        tokenizer_mode="auto",
        trust_remote_code=False,
        seed=0,
        dtype="float16",
    )

    pooling_params = PoolingParams(dimensions=None)
    pooling_params.verify(task=task, model_config=model_config)

    with pytest.raises(ValueError):
        pooling_params = PoolingParams(dimensions=1)
        pooling_params.verify(task=task, model_config=model_config)

    if model_info.is_matryoshka:
        assert model_info.matryoshka_dimensions is not None
        pooling_params = PoolingParams(dimensions=model_info.matryoshka_dimensions[0])
        pooling_params.verify(task=task, model_config=model_config)


@pytest.mark.parametrize("task", ["score", "classify"])
def test_classify(task):
    model_config = MockModelConfig(pooler_config=PoolerConfig(pooling_type="CLS"))

    pooling_params = PoolingParams(activation=None)
    pooling_params.verify(task=task, model_config=model_config)

    pooling_params = PoolingParams(activation=True)
    pooling_params.verify(task=task, model_config=model_config)

    pooling_params = PoolingParams(activation=False)
    pooling_params.verify(task=task, model_config=model_config)

    invalid_parameters = embed_parameters + step_pooling_parameters
    for p in invalid_parameters:
        with pytest.raises(ValueError):
            pooling_params = PoolingParams(**{p: True})
            pooling_params.verify(task=task, model_config=model_config)


@pytest.mark.parametrize("pooling_type", ["ALL", "STEP"])
def test_token_embed(pooling_type: str):
    task = "token_embed"
    model_config = MockModelConfig(
        pooler_config=PoolerConfig(pooling_type=pooling_type)
    )

    pooling_params = PoolingParams(normalize=None)
    pooling_params.verify(task=task, model_config=model_config)

    pooling_params = PoolingParams(normalize=True)
    pooling_params.verify(task=task, model_config=model_config)

    pooling_params = PoolingParams(normalize=False)
    pooling_params.verify(task=task, model_config=model_config)

    invalid_parameters = classify_parameters
    if pooling_type != "STEP":
        invalid_parameters = classify_parameters + step_pooling_parameters

    for p in invalid_parameters:
        with pytest.raises(ValueError):
            pooling_params = PoolingParams(**{p: True})
            pooling_params.verify(task=task, model_config=model_config)


@pytest.mark.parametrize("pooling_type", ["ALL", "STEP"])
def test_token_classify(pooling_type: str):
    task = "token_classify"
    model_config = MockModelConfig(
        pooler_config=PoolerConfig(pooling_type=pooling_type)
    )

    pooling_params = PoolingParams(activation=None)
    pooling_params.verify(task=task, model_config=model_config)

    pooling_params = PoolingParams(activation=True)
    pooling_params.verify(task=task, model_config=model_config)

    pooling_params = PoolingParams(activation=False)
    pooling_params.verify(task=task, model_config=model_config)

    invalid_parameters = embed_parameters
    if pooling_type != "STEP":
        invalid_parameters = embed_parameters + step_pooling_parameters

    for p in invalid_parameters:
        with pytest.raises(ValueError):
            pooling_params = PoolingParams(**{p: True})
            pooling_params.verify(task=task, model_config=model_config)