"""
Twitch OAuth Service (for future implementation)
This service provides the structure for Twitch OAuth integration when credentials are configured.
"""

from typing import Optional, Dict
from ..config import settings


class TwitchAuthService:
    """
    Service for handling Twitch OAuth authentication (prepared for future implementation)
    """
    
    def __init__(self):
        self.client_id = getattr(settings, 'TWITCH_CLIENT_ID', None)
        self.client_secret = getattr(settings, 'TWITCH_CLIENT_SECRET', None)
        self.redirect_uri = getattr(settings, 'TWITCH_REDIRECT_URI', f"{settings.ALLOWED_ORIGINS.split(',')[0]}/auth/twitch/callback")
        self.scopes = ['user:read:email', 'user:read:subscriptions']
    
    def is_configured(self) -> bool:
        """Check if Twitch OAuth is properly configured"""
        return bool(self.client_id and self.client_secret)
    
    def get_auth_url(self, state: Optional[str] = None) -> str:
        """
        Generate Twitch OAuth authorization URL (for future implementation)
        """
        if not self.is_configured():
            raise RuntimeError("Twitch OAuth is not configured")
        
        # This will be implemented when Twitch credentials are provided
        # For now, return a placeholder
        return f"https://id.twitch.tv/oauth2/authorize?client_id={self.client_id}&redirect_uri={self.redirect_uri}&response_type=code&scope={' '.join(self.scopes)}"
    
    async def exchange_code_for_token(self, code: str) -> Dict:
        """
        Exchange authorization code for access token (for future implementation)
        """
        if not self.is_configured():
            raise RuntimeError("Twitch OAuth is not configured")
        
        # This will be implemented when Twitch credentials are provided
        raise NotImplementedError("Twitch OAuth token exchange not yet implemented")
    
    async def get_user_info(self, access_token: str) -> Dict:
        """
        Get user information from Twitch (for future implementation)
        """
        if not self.is_configured():
            raise RuntimeError("Twitch OAuth is not configured")
        
        # This will be implemented when Twitch credentials are provided
        raise NotImplementedError("Twitch user info retrieval not yet implemented")
    
    async def refresh_access_token(self, refresh_token: str) -> Dict:
        """
        Refresh access token using refresh token (for future implementation)
        """
        if not self.is_configured():
            raise RuntimeError("Twitch OAuth is not configured")
        
        # This will be implemented when Twitch credentials are provided
        raise NotImplementedError("Twitch token refresh not yet implemented")