"""
Piper TTS client for Pipecat pipeline.
Calls the self-hosted Piper HTTP service.
"""
import io
import logging
import wave
import httpx

logger = logging.getLogger(__name__)


class PiperTTSClient:
    """HTTP client for the Piper TTS service."""

    def __init__(self, base_url: str = "http://piper-tts:8003"):
        self.base_url = base_url.rstrip("/")
        self._client = httpx.AsyncClient(timeout=10.0)

    async def synthesize(self, text: str) -> bytes:
        """Convert text to WAV audio bytes via Piper service."""
        try:
            response = await self._client.post(
                f"{self.base_url}/synthesize",
                json={"text": text, "length_scale": 0.95, "sentence_silence": 0.15},
            )
            response.raise_for_status()
            return response.content
        except Exception as e:
            logger.error(f"Piper TTS failed: {e}")
            return b""

    async def close(self):
        await self._client.aclose()