import logging

class VoiceChannelManager:
    async def join_voice_channel(self, channel):
        """ボイスチャンネルに接続する"""
        try:
            await channel.connect()
        except Exception as e:
            logging.info(f"Failed to join voice channel: {e}")
            raise

    async def leave_voice_channel(self, guild, bot=None):
        """ボイスチャンネルから切断する"""
        try:
            if guild.voice_client is not None:
                await guild.voice_client.disconnect()
                if bot is not None:
                    bot.volume = 1.0
                    bot.reset_emotion()
        except Exception as e:
            logging.info(f"Failed to leave voice channel: {e}")
            raise

    def get_connected_channel(self, guild):
        """ボットが接続しているボイスチャンネルを取得する"""
        if guild.voice_client and guild.voice_client.is_connected():
            return guild.voice_client.channel
        return None