import base64
import time
from configs.logging import logger

def decode_user(username, password):
    if not username or not password:
        return '' , ''
    try:
        u = base64.b64decode(username).decode('utf-8')
        p = base64.b64decode(password).decode('utf-8')
        return u, p
    except Exception as e:
        logger.error(e)
        return username, password


def encode_base64(str):
    return  base64.encodebytes(str.encode('utf-8')).decode('utf-8')


def byte_conversion(size):
    if size < 1024:
        return str("%.1f"%size) + 'B'
    elif size < 1024 * 1024:
        return str("%.1f"%(size/1024)) + 'KB'
    elif size < 1024 * 1024 * 1024:
        return str("%.1f"%(size/1024/1024)) + 'MB'
    else:
        return str("%.1f"%(size/1024/1024/1024)) + 'GB'


def get_cmd_parameter(jvm_param, inc_start_time, replace_param, partition_info):
    cmd_parameter = ''
    current_time = int(time.time())
    if jvm_param is not None:
        cmd_parameter += '-j "' + jvm_param + '" '
    if replace_param is not None:
        cmd_parameter += '-p "' + (replace_param % (inc_start_time,current_time))
    if partition_info is not None:
        partition_list = partition_info.split(',')
        partition_time = current_time - 86400*int(partition_list[1])
        partition_time_format = partition_list[2].replace('yyyy','%Y').replace('MM','%m').replace('dd','%d')
        partition_time_str = time.strftime(partition_time_format,time.localtime(partition_time))
        cmd_parameter += ' -Dpartition=' + str(partition_list[0]) + '=' + partition_time_str
    if replace_param is not None:
        cmd_parameter += '" '
    return cmd_parameter