from abc import ABC, abstractmethod
from typing import TYPE_CHECKING, Any, Dict, List, Optional, Union

import httpx

from litellm.types.rerank import OptionalRerankParams, RerankResponse

from ..chat.transformation import BaseLLMException

if TYPE_CHECKING:
    from litellm.litellm_core_utils.litellm_logging import Logging as _LiteLLMLoggingObj

    LiteLLMLoggingObj = _LiteLLMLoggingObj
else:
    LiteLLMLoggingObj = Any


class BaseRerankConfig(ABC):
    @abstractmethod
    def validate_environment(
        self,
        headers: dict,
        model: str,
        api_key: Optional[str] = None,
    ) -> dict:
        pass

    @abstractmethod
    def transform_rerank_request(
        self,
        model: str,
        optional_rerank_params: OptionalRerankParams,
        headers: dict,
    ) -> dict:
        return {}

    @abstractmethod
    def transform_rerank_response(
        self,
        model: str,
        raw_response: httpx.Response,
        model_response: RerankResponse,
        logging_obj: LiteLLMLoggingObj,
        api_key: Optional[str] = None,
        request_data: dict = {},
        optional_params: dict = {},
        litellm_params: dict = {},
    ) -> RerankResponse:
        return model_response

    @abstractmethod
    def get_complete_url(self, api_base: Optional[str], model: str) -> str:
        """
        OPTIONAL

        Get the complete url for the request

        Some providers need `model` in `api_base`
        """
        return api_base or ""

    @abstractmethod
    def get_supported_cohere_rerank_params(self, model: str) -> list:
        pass

    @abstractmethod
    def map_cohere_rerank_params(
        self,
        non_default_params: Optional[dict],
        model: str,
        drop_params: bool,
        query: str,
        documents: List[Union[str, Dict[str, Any]]],
        custom_llm_provider: Optional[str] = None,
        top_n: Optional[int] = None,
        rank_fields: Optional[List[str]] = None,
        return_documents: Optional[bool] = True,
        max_chunks_per_doc: Optional[int] = None,
    ) -> OptionalRerankParams:
        pass

    @abstractmethod
    def get_error_class(
        self, error_message: str, status_code: int, headers: Union[dict, httpx.Headers]
    ) -> BaseLLMException:
        pass