from redis import asyncio as aioredis

from core.settings import redis_settings


class RedisUtil:
		"""
			 Redis相关方法
			 """
		redis = None
		
		@classmethod
		async def create_redis_pool(cls) -> aioredis.Redis:
				"""
				应用启动时初始化redis连接
		
				:return: Redis连接对象
				"""
				if not redis_settings.enable:
						return
				from utils import logger
				logger.info('开始连接redis...')
				redis = await aioredis.from_url(
						url=f'redis://{redis_settings.host}',
						port=redis_settings.port,
						username=redis_settings.username,
						password=redis_settings.password,
						db=redis_settings.database,
						encoding='utf-8',
						decode_responses=True,
				)
				try:
						connection = await redis.ping()
						if connection:
								logger.info('redis连接成功')
						else:
								logger.error('redis连接失败')
						cls.redis = redis
				except AuthenticationError as e:
						logger.error(f'redis用户名或密码错误，详细错误信息：{e}')
				except TimeoutError as e:
						logger.error(f'redis连接超时，详细错误信息：{e}')
				except RedisError as e:
						logger.error(f'redis连接错误，详细错误信息：{e}')
		
		@classmethod
		async def get_redis_pool(cls) -> aioredis.Redis:
				"""
				获取redis连接对象
				:return: Redis连接对象
				"""
				if cls.redis is None:
						await cls.create_redis_pool()
				return cls.redis
		
		@classmethod
		async def close_redis_pool(cls):
				"""
				应用关闭时关闭redis连接
				:return:
				"""
				from utils import logger
				if cls.redis is None:
						return
				try:
						await cls.redis.close()
						logger.info('关闭redis连接成功')
				except RuntimeError as e:
						logger.debug('尝试关闭Redis连接时事件循环已关闭，可能正常退出：%s', e)