litellm/llms/deepseek/chat/transformation.py

"""
Translates from OpenAI's `/v1/chat/completions` to DeepSeek's `/v1/chat/completions`
"""

from typing import Any, Coroutine, List, Literal, Optional, Tuple, Union, overload

from litellm.litellm_core_utils.prompt_templates.common_utils import (
    handle_messages_with_content_list_to_str_conversion,
)
from litellm.secret_managers.main import get_secret_str
from litellm.types.llms.openai import AllMessageValues

from ...openai.chat.gpt_transformation import OpenAIGPTConfig


class DeepSeekChatConfig(OpenAIGPTConfig):
    @overload
    def _transform_messages(
        self, messages: List[AllMessageValues], model: str, is_async: Literal[True]
    ) -> Coroutine[Any, Any, List[AllMessageValues]]:
        ...

    @overload
    def _transform_messages(
        self,
        messages: List[AllMessageValues],
        model: str,
        is_async: Literal[False] = False,
    ) -> List[AllMessageValues]:
        ...

    def _transform_messages(
        self, messages: List[AllMessageValues], model: str, is_async: bool = False
    ) -> Union[List[AllMessageValues], Coroutine[Any, Any, List[AllMessageValues]]]:
        """
        DeepSeek does not support content in list format.
        """
        messages = handle_messages_with_content_list_to_str_conversion(messages)
        if is_async:
            return super()._transform_messages(
                messages=messages, model=model, is_async=True
            )
        else:
            return super()._transform_messages(
                messages=messages, model=model, is_async=False
            )

    def _get_openai_compatible_provider_info(
        self, api_base: Optional[str], api_key: Optional[str]
    ) -> Tuple[Optional[str], Optional[str]]:
        api_base = (
            api_base
            or get_secret_str("DEEPSEEK_API_BASE")
            or "https://api.deepseek.com/beta"
        )  # type: ignore
        dynamic_api_key = api_key or get_secret_str("DEEPSEEK_API_KEY")
        return api_base, dynamic_api_key

    def get_complete_url(
        self,
        api_base: Optional[str],
        api_key: Optional[str],
        model: str,
        optional_params: dict,
        litellm_params: dict,
        stream: Optional[bool] = None,
    ) -> str:
        """
        If api_base is not provided, use the default DeepSeek /chat/completions endpoint.
        """
        if not api_base:
            api_base = "https://api.deepseek.com/beta"

        if not api_base.endswith("/chat/completions"):
            api_base = f"{api_base}/chat/completions"

        return api_base