"""
Groq API Service - LLM Integration
"""
from groq import Groq
from typing import Optional, List, Dict, Any
from src.config.settings import settings
from src.api.core.logger import logger

client: Optional[Groq] = None


def get_groq_client() -> Groq:
    """Get or create Groq client instance"""
    global client
    if client is None:
        client = Groq(api_key=settings.GROQ_API_KEY)
    return client


async def generate_response(
    messages: List[Dict[str, str]],
    model: str = None,
    temperature: float = 0.7,
    max_tokens: int = 4096,
) -> str:
    """
    Generate response using Groq API
    
    Args:
        messages: List of message dicts with 'role' and 'content'
        model: Model name (defaults to settings.GROQ_MODEL)
        temperature: Sampling temperature
        max_tokens: Maximum tokens to generate
    
    Returns:
        Generated response string
    """
    try:
        groq_client = get_groq_client()
        model = model or settings.GROQ_MODEL
        
        response = groq_client.chat.completions.create(
            model=model,
            messages=messages,
            temperature=temperature,
            max_tokens=max_tokens,
        )
        
        return response.choices[0].message.content
    
    except Exception as e:
        logger.error(f"Groq API error: {str(e)}")
        raise


async def stream_response(
    messages: List[Dict[str, str]],
    model: str = None,
    temperature: float = 0.7,
) -> str:
    """Stream response from Groq API"""
    try:
        groq_client = get_groq_client()
        model = model or settings.GROQ_MODEL
        
        stream = groq_client.chat.completions.create(
            model=model,
            messages=messages,
            temperature=temperature,
            stream=True,
        )
        
        full_response = ""
        for chunk in stream:
            if chunk.choices[0].delta.content:
                full_response += chunk.choices[0].delta.content
        
        return full_response
    
    except Exception as e:
        logger.error(f"Groq streaming error: {str(e)}")
        raise