services/tts_service.py

import requests
import uuid
import os
from pathlib import Path
from config import GROQ_TTS_API_KEY, GROQ_TTS_MODEL

def text_to_speech(
    text: str, 
    voice: str = "Aaliyah-PlayAI",
    fmt: str = "wav"
) -> str:
    """
    Convert text to speech using Groq's TTS API (English only)
    """
    if not GROQ_TTS_API_KEY:
        raise RuntimeError("GROQ_TTS_API_KEY is not set in config")
    
    if not text or not text.strip():
        raise ValueError("Text cannot be empty")
    
    url = "https://api.groq.com/openai/v1/audio/speech"
    
    headers = {
        "Authorization": f"Bearer {GROQ_TTS_API_KEY}",
        "Content-Type": "application/json"
    }
    
    payload = {
        "model": GROQ_TTS_MODEL,
        "input": text.strip(),
        "voice": voice,
        "response_format": fmt
    }
    
    try:
        # Create temp directory for audio files
        temp_dir = Path("temp_audio")
        temp_dir.mkdir(exist_ok=True)
        
        # Unique filename
        output_filename = f"tts_{uuid.uuid4().hex[:8]}.{fmt}"
        output_path = temp_dir / output_filename
        
        # Call Groq API
        response = requests.post(url, headers=headers, json=payload, timeout=30)
        response.raise_for_status()
        
        # Save audio file
        with open(output_path, "wb") as f:
            f.write(response.content)
        
        return str(output_path)
        
    except requests.exceptions.RequestException as e:
        raise Exception(f"Groq TTS API error: {str(e)}")
    except Exception as e:
        raise Exception(f"Unexpected error in text_to_speech: {str(e)}")