# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
"""Tests whether Marlin models can be loaded from the autogptq config.

Run `pytest tests/quantization/test_configs.py --forked`.
"""

from dataclasses import dataclass

import pytest
import os

from vllm.config import ModelConfig
from vllm.platforms import current_platform
from tests.utils import models_path_prefix


@dataclass
class ModelPair:
    model_marlin: str
    model_gptq: str


# Model Id // Quantization Arg // Expected Type
MODEL_ARG_EXPTYPES = [
    # AUTOGPTQ
    # compat: autogptq <=0.7.1 is_marlin_format: bool
    # Model Serialized in Exllama Format.
    (
        os.path.join(models_path_prefix, "TheBloke/Llama-2-7B-Chat-GPTQ"),
        None,
        "gptq_marlin" if current_platform.is_cuda() else "gptq",
    ),
    (
        os.path.join(models_path_prefix, "TheBloke/Llama-2-7B-Chat-GPTQ"),
        "marlin",
        "gptq_marlin" if current_platform.is_cuda() else "ERROR",
    ),
    (os.path.join(models_path_prefix, "TheBloke/Llama-2-7B-Chat-GPTQ"), "gptq", "gptq"),
    (os.path.join(models_path_prefix, "TheBloke/Llama-2-7B-Chat-GPTQ"), "awq", "ERROR"),
    # compat: autogptq >=0.8.0 use checkpoint_format: str

    # Model Serialized in Exllama Format.
    (
        os.path.join(models_path_prefix, "LnL-AI/TinyLlama-1.1B-Chat-v1.0-GPTQ-4bit"),
        None,
        "gptq_marlin" if current_platform.is_cuda() else "gptq",
    ),
    (
        os.path.join(models_path_prefix, "LnL-AI/TinyLlama-1.1B-Chat-v1.0-GPTQ-4bit"),
        "marlin",
        "gptq_marlin" if current_platform.is_cuda() else "ERROR",
    ),
    (os.path.join(models_path_prefix, "LnL-AI/TinyLlama-1.1B-Chat-v1.0-GPTQ-4bit"), "gptq", "gptq"),
    (os.path.join(models_path_prefix, "LnL-AI/TinyLlama-1.1B-Chat-v1.0-GPTQ-4bit"), "awq", "ERROR"),
    # AUTOAWQ
    (
        os.path.join(models_path_prefix, "TheBloke/OpenHermes-2.5-Mistral-7B-AWQ"),
        None,
        "awq_marlin" if current_platform.is_cuda() else "awq",
    ),
    (os.path.join(models_path_prefix, "TheBloke/OpenHermes-2.5-Mistral-7B-AWQ"), "awq", "awq"),
    (
        os.path.join(models_path_prefix, "TheBloke/OpenHermes-2.5-Mistral-7B-AWQ"),
        "marlin",
        "awq_marlin" if current_platform.is_cuda() else "ERROR",
    ),
    (os.path.join(models_path_prefix, "TheBloke/OpenHermes-2.5-Mistral-7B-AWQ"), "gptq", "ERROR"),
]


@pytest.mark.parametrize("model_arg_exptype", MODEL_ARG_EXPTYPES)
def test_auto_gptq(model_arg_exptype: tuple[str, None, str]) -> None:
    model_path, quantization_arg, expected_type = model_arg_exptype

    try:
        model_config = ModelConfig(model_path, quantization=quantization_arg)
        found_quantization_type = model_config.quantization
    except ValueError:
        found_quantization_type = "ERROR"

    assert found_quantization_type == expected_type, (
        f"Expected quant_type == {expected_type} for {model_path}, "
        f"but found {found_quantization_type} "
        f"for no --quantization {quantization_arg} case"
    )
