import asyncio
from typing import Dict, List


class OfflineAudioCache:
    def __init__(self):
        self.offline_audio: Dict[str, List[str]] = {}
        self.lock = asyncio.Lock()

    async def add_audio_url(self, device_id: str, audio_url: str):
        async with self.lock:
            if device_id not in self.offline_audio:
                self.offline_audio[device_id] = []
            self.offline_audio[device_id].append(audio_url)

    async def get_audio_urls(self, device_id: str) -> List[str]:
        async with self.lock:
            return list(self.offline_audio.get(device_id, []))

    async def pop_audio_urls(self, device_id: str) -> List[str]:
        async with self.lock:
            return self.offline_audio.pop(device_id, [])

    async def clear_audio_urls(self, device_id: str):
        async with self.lock:
            if device_id in self.offline_audio:
                del self.offline_audio[device_id]

    async def has_pending_audio(self, device_id: str) -> bool:
        async with self.lock:
            return device_id in self.offline_audio and len(self.offline_audio[device_id]) > 0
    
    async def get_all_audio_cache(self) -> List[str]:
        async with self.lock:
            return self.offline_audio

# 单例实例
offline_audio_cache = OfflineAudioCache()