"""OpenAI (and OpenAI-compatible) LLM backend. Stub — implement when needed."""

from typing import AsyncGenerator

from .base import LLMBackend, LLMChunk, LLMResponse, Message, ToolSchema


class OpenAIBackend(LLMBackend):
    """
    Supports OpenAI and any OpenAI-compatible endpoint (vLLM, LM Studio, etc.).
    Set base_url to point at a compatible server.
    """

    def __init__(self, model: str, api_key: str, base_url: str | None = None):
        self.model = model
        self._api_key = api_key
        self._base_url = base_url

    async def complete(
        self,
        messages: list[Message],
        tools: list[ToolSchema] | None = None,
        temperature: float = 0.7,
        model: str | None = None,
    ) -> LLMResponse:
        raise NotImplementedError("OpenAI backend not yet implemented")

    async def stream(
        self,
        messages: list[Message],
        temperature: float = 0.7,
        model: str | None = None,
    ) -> AsyncGenerator[LLMChunk, None]:
        raise NotImplementedError("OpenAI backend not yet implemented")
        yield  # makes this a generator

    async def stream_complete(
        self,
        messages: list[Message],
        tools: list["ToolSchema"] | None = None,
        temperature: float = 0.7,
        model: str | None = None,
    ) -> AsyncGenerator[LLMChunk, None]:
        raise NotImplementedError("OpenAI backend not yet implemented")
        yield  # makes this a generator