"""
NovaAi – TTS-Engine-Hub
utils/cache.py
Version: v0.0.1

Description:
  Caching utilities for TTS requests (cache key generation, etc).

Author: Abby (ChatGPT)
Date: 2025-07-23
Canvas: utils/cache.py
"""

import hashlib

# Für die API: Wichtig! req muss mindestens die Felder .text, .engine, .model, .speaker, .format, .chunking haben.
def build_cache_key(req) -> str:
    """
    Build a cache key from all relevant TTS request parameters.
    """
    data = f"{req.text}|{req.engine}|{req.model}|{req.speaker}|{req.format}|{getattr(req, 'chunking', False)}"
    return hashlib.sha256(data.encode()).hexdigest()