"""
Cache repository implementation - placeholder
"""

from typing import Optional, Dict, Any
from .interfaces import CacheRepository
from ..models.transcription import TranscriptionResult
from ..models.audio import AudioFile

class CacheRepositoryImpl(CacheRepository):
    """Implementation of CacheRepository interface"""
    
    def __init__(self):
        self._cache = {}
    
    async def get_transcription(self, audio_hash: str) -> Optional[TranscriptionResult]:
        """Get cached transcription result"""
        return self._cache.get(f"transcription_{audio_hash}")
    
    async def save_transcription(self, audio_hash: str, result: TranscriptionResult) -> bool:
        """Save transcription result to cache"""
        self._cache[f"transcription_{audio_hash}"] = result
        return True
    
    async def get_audio_info(self, file_path: str) -> Optional[AudioFile]:
        """Get cached audio file info"""
        return self._cache.get(f"audio_info_{file_path}")
    
    async def save_audio_info(self, file_path: str, audio_info: AudioFile) -> bool:
        """Save audio file info to cache"""
        self._cache[f"audio_info_{file_path}"] = audio_info
        return True
    
    async def invalidate(self, key: str) -> bool:
        """Invalidate cache entry"""
        if key in self._cache:
            del self._cache[key]
            return True
        return False
    
    async def clear_cache(self) -> bool:
        """Clear all cache entries"""
        self._cache.clear()
        return True
    
    async def get_cache_stats(self) -> Dict[str, Any]:
        """Get cache statistics"""
        return {
            "total_entries": len(self._cache),
            "memory_usage": sum(len(str(v)) for v in self._cache.values())
        }