# -*- coding: UTF-8 -*-
#  Copyright 2020 Zhejiang Lab. All Rights Reserved.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#  =============================================================
import redis
from pathlib import Path
from .config_utils import ConfigInstance


# Singleton mode
class RedisUtils:
    def __init__(self):
        self.conn = redis.Redis(
            host=ConfigInstance.conf_redis_host(),
            port=ConfigInstance.conf_redis_port(),
            password=ConfigInstance.conf_redis_password(),
            decode_responses=True,
            db=ConfigInstance.conf_redis_db()
        )

    def get_file_path(self, uid, run, type, tag):
        _key = uid + '_' + run + '_' + type + '_' + tag
        return Path(self.conn.get(_key))

    def send_message(self, msg):
        self.conn.lpush("sessions", msg)

    def lpush(self, name, value):
        self.conn.lpush(name, value)

    def brpop(self, name, timeout=0):
        return self.conn.brpop(name, timeout)

    def exist(self, name):
        return self.conn.exists(name)

    def get(self, name):
        return self.conn.get(name)

    def set(self, name, value):
        self.conn.set(name, value)

    def flushdb(self):
        self.conn.flushdb()

    def delete(self, name):
        self.conn.delete(name)

    def keys(self, pattern='*'):
        return self.conn.keys(pattern)


RedisInstance = RedisUtils()