import redis
import os
from config import conf
# 定义全局 redis_helper
redis_helper = None

class RedisHelper:
    def __init__(self, host='localhost', port=6379, password=None ,db=0):
        # 初始化 Redis 连接
        self.client = redis.Redis(host=host, port=port,db=db,password=password)

    def set_hash(self, hash_key, data, timeout=None):
        """添加或更新哈希，并设置有效期"""
        self.client.hset(hash_key, mapping=data)
        if timeout:
            # 设置有效期（单位：秒）
            self.client.expire(hash_key, timeout)

    def get_hash(self, hash_key):
        """获取整个哈希表数据"""
        result = self.client.hgetall(hash_key)
        # 将字节数据解码成字符串格式返回
        return {k.decode('utf-8'): v.decode('utf-8') for k, v in result.items()}

    def get_hash_field(self, hash_key, field):
        """获取哈希表中的单个字段值"""
        result = self.client.hget(hash_key, field)
        return result.decode('utf-8') if result else None

    def delete_hash(self, hash_key):
        """删除整个哈希表"""
        self.client.delete(hash_key)
    
    def delete_hash_field(self, hash_key, field):
        """删除哈希表中的某个字段"""
        self.client.hdel(hash_key, field)

    def update_hash_field(self, hash_key, field, value):
        """更新哈希表中的某个字段"""
        self.client.hset(hash_key, field, value)

def start():
    global redis_helper
    
    host=conf().get("redis_host")
    port=conf().get("redis_port")
    password=conf().get("redis_password")
    db=conf().get("redis_db")
    redis_helper = RedisHelper(host=host,port=port,password=password,db=db)