from abc import ABC, abstractmethod
from typing import Dict, Any, Optional

class BaseProvider(ABC):
    """Base class for WhatsApp messaging providers"""
    
    @abstractmethod
    def send_message(
        self,
        to: str,
        template_name: Optional[str],
        template_body: str,
        variables: Dict[str, str],
        language: str = "en"
    ) -> str:
        """
        Send a WhatsApp message.
        
        Args:
            to: Phone number in E.164 format
            template_name: WhatsApp template name (if using approved template)
            template_body: Message body text
            variables: Variables to substitute in template
            language: Language code
            
        Returns:
            Provider message ID
        """
        pass
    
    @abstractmethod
    def get_provider_name(self) -> str:
        """Get provider name"""
        pass