from typing import Optional, Generator
from groq import Groq


class LLMHandler:
    def __init__(
        self,
        api_key: str,
        model: str = "llama-3.1-8b-instant",
        temperature: float = 0.1,
        max_tokens: int = 2048,
        timeout: int = 10,
    ):
        if not api_key:
            raise ValueError(
                "GROQ_API_KEY is not set. Set it via environment variable or config."
            )
        self.client = Groq(api_key=api_key, timeout=timeout)
        self.model = model
        self.temperature = temperature
        self.max_tokens = max_tokens

    def generate(self, prompt: str) -> Optional[str]:
        try:
            response = self.client.chat.completions.create(
                model=self.model,
                messages=[{"role": "user", "content": prompt}],
                temperature=self.temperature,
                max_tokens=self.max_tokens,
            )
            return response.choices[0].message.content
        except Exception as e:
            return None

    def generate_stream(self, prompt: str) -> Generator[str, None, None]:
        try:
            stream = self.client.chat.completions.create(
                model=self.model,
                messages=[{"role": "user", "content": prompt}],
                temperature=self.temperature,
                max_tokens=self.max_tokens,
                stream=True,
            )
            for chunk in stream:
                delta = chunk.choices[0].delta.content if chunk.choices else ""
                if delta:
                    yield delta
        except Exception as e:
            yield f"[Error: {e}]"