OpenAI TTS

class OpenAITTSService(BaseTTSService):
    """
    OpenAI TTS service implementation.
    This is an example implementation to show how new providers can be added.
    
    Note: This is a placeholder implementation. To make it functional, you would need to:
    1. Install openai: pip install openai
    2. Implement the actual OpenAI TTS API calls
    3. Handle streaming audio properly
    """
    
    def __init__(self, call_sid=None, api_key=None, voice_id=None, model_id=None, **kwargs):
        super().__init__(call_sid=call_sid, api_key=api_key)
        self.voice_id = voice_id or "alloy"
        self.model_id = model_id or "tts-1"
        
    async def start_session(self, options=None, audio_callback=None, metadata=None):
        # Placeholder implementation
        self.is_connected = True
        return True
        
    async def process_text(self, text, force_flush=False):
        # Placeholder - actual implementation needed
        logger.info(f"Would convert text to speech: {text}")
        return True

class OpenAITTSService(BaseTTSService):
    """
    Full OpenAI TTS implementation (planned)
    """
    
    def __init__(self, call_sid=None, api_key=None, **kwargs):
        import openai
        self.client = openai.Client(api_key=api_key)
        super().__init__(call_sid=call_sid, api_key=api_key)
        
    async def start_session(self, options=None, audio_callback=None, metadata=None):
        # Real implementation with OpenAI client
        self.audio_callback = audio_callback
        self.is_connected = True
        return True
        
    async def process_text(self, text, force_flush=False):
        # Real OpenAI TTS API call
        response = self.client.audio.speech.create(
            model=self.model_id,
            voice=self.voice_id,
            input=text
        )
        
        # Stream audio to callback
        if self.audio_callback:
            await self.audio_callback(response.content, True, {})
        
        return True