import ftplib
import json
import cryptography.fernet


# import getpass


class FTPUtils:
    def __init__(self, hostname, user, password):
        self.host = hostname
        self.user = user
        self.password = password
        self.ftp = ftplib.FTP()
        self.ftp.connect(self.host)
        self.ftp.login(self.user, self.password)

    def upload(self, upload_item):
        cmd = 'STOR {}'.format(upload_item)
        self.ftp.storbinary(cmd, open(upload_item, 'rb'))
        print("done uploading: {}".format(upload_item))

    def ls(self):
        self.ftp.retrlines('LIST')

    def __del__(self):
        self.ftp.close()


config = json.load(open('ftpauth.json'))
host = config['hostname']
user = config['username']
key = config['key'].encode('ascii')  # unicode into byte string
token = config['password_token'].encode('ascii')
f = cryptography.fernet.Fernet(key)
password = f.decrypt(token).decode('ascii')  # byte into unicode

f = FTPUtils(host, user, password)
f.upload('passwd.txt')
f.ls()