from openai import AsyncOpenAI
from app.config import OPENAI_API_KEY, OPENAI_MODEL


class OpenAIClient:

    _client = None

    def __init__(self):
        self.api_key = OPENAI_API_KEY
        self.model = OPENAI_MODEL
        if OpenAIClient._client is None and self.api_key:
            OpenAIClient._client = AsyncOpenAI(
                api_key=self.api_key,
                timeout=12.0,
                max_retries=1,
            )

    async def generate_response(
        self,
        system_prompt: str,
        user_message: str,
    ) -> str:
        client = OpenAIClient._client or AsyncOpenAI(
            api_key=self.api_key or "sk-dummy-key-placeholder",
            timeout=12.0,
        )
        response = await client.chat.completions.create(
            model=self.model or "gpt-4o-mini",
            messages=[
                {"role": "system", "content": system_prompt},
                {"role": "user", "content": user_message},
            ],
            response_format={"type": "json_object"},
            temperature=0.35,
            max_completion_tokens=140,
        )
        return response.choices[0].message.content