# helpers/ai_client.py
import os
from openai import OpenAI
from typing import Optional
import logging

# Set up logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

class AIClient:
    def __init__(self):
        # Load environment variables
        self.base_url = os.getenv("LLM_API_URL", "https://openrouter.ai/api/v1")
        self.api_key = os.getenv("OPENROUTER_API_KEY")
        self.site_url = os.getenv("SITE_URL", "")  # Your site URL
        self.site_name = os.getenv("SITE_NAME", "")  # Your site name
        
        # Initialize OpenAI client
        self.client = OpenAI(
            base_url=self.base_url,
            api_key=self.api_key
        )

    def chat(
        self,
        prompt: str,
        system_message: str = "",
        model_id: str = "openai/gpt-4o-mini",
        conversation_id: str = "",
        user_id: str = "string"
    ) -> str:
        """
        Sends a prompt to the OpenRouter API and returns the response as text.
        Args:
            prompt (str): The user's input prompt.
            system_message (str): Optional system message for the LLM.
            model_id (str): The model ID to use (default: "openai/gpt-4o-mini").
            conversation_id (str): Unique ID for the conversation.
            user_id (str): Unique ID for the user.
            api_key (str): API key for authentication.
        Returns:
            str: The text response from the LLM API.
        Raises:
            Exception: If the API request fails.
        """
        try:
            messages = []
            
            # Add system message if provided
            if system_message:
                messages.append({"role": "system", "content": system_message})
            
            # Add user message
            messages.append({"role": "user", "content": prompt})

            # Create completion
            completion = self.client.chat.completions.create(
                extra_headers={
                    "HTTP-Referer": self.site_url,  # Optional
                    "X-Title": self.site_name,      # Optional
                },
                model=model_id,
                messages=messages
            )

            # Return the response text
            return completion.choices[0].message.content

        except Exception as e:
            logger.error(f"Error in chat completion: {str(e)}")
            raise Exception(f"Error from OpenRouter API: {str(e)}")