"""OpenAI TTS adapter — implements TTSProvider port."""

from io import BytesIO

from openai import OpenAI


class OpenAITTSProvider:
    def __init__(self, api_key: str, model: str = "tts-1"):
        self._client = OpenAI(api_key=api_key) if api_key else None
        self._model = model

    async def synthesize(self, text: str, voice: str = "alloy") -> bytes:
        if not self._client:
            return b""
        try:
            response = self._client.audio.speech.create(
                model=self._model,
                voice=voice,
                input=text,
            )
            buf = BytesIO()
            for chunk in response.iter_bytes():
                buf.write(chunk)
            return buf.getvalue()
        except Exception:
            return b""