# instance_provider.py
import os
from typing import List, Optional
from pydantic_ai.models.openai import OpenAIModel
from pydantic_ai.providers.openai import OpenAIProvider
from dotenv import load_dotenv

load_dotenv()

class InstanceProvider:
    """Manages multiple Groq API instances with simple rotation"""
    
    def __init__(self):
        self.instances: List[OpenAIModel] = []
        self.current_index = 0
        self._initialize_instances()
    
    def _initialize_instances(self):
        """Load all API keys and create instances"""
        api_keys = os.getenv("GROQ_API_KEYS", "").split(",")
        base_url = os.getenv("GROQ_OPENAI_URL")
        model_name = os.getenv("GROQ_LLM_MODEL")
        
        for key in api_keys:
            key = key.strip()
            if key:
                self.instances.append(
                    OpenAIModel(
                        model_name,
                        provider=OpenAIProvider(
                            base_url=base_url,
                            api_key=key
                        )
                    )
                )
    
    def get_next_instance(self) -> Optional[OpenAIModel]:
        """Get next instance in rotation"""
        if not self.instances:
            return None
        
        instance = self.instances[self.current_index]
        self.current_index = (self.current_index + 1) % len(self.instances)
        return instance
    
    def get_total_instances(self) -> int:
        """Return total number of instances available"""
        return len(self.instances)