#!/usr/bin/env python
# -*- coding: utf-8 -*-

#
#  Copyright 2019 The FATE Authors. 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.

from federatedml.secureprotol.encrypt import PaillierEncrypt
from federatedml.util import consts


class Guest(object):
    def __init__(self):
        self._pubkey_transfer = None

    def gen_paillier_cipher_operator(self, transfer_variables, suffix=tuple()):
        self._pubkey_transfer = transfer_variables.paillier_pubkey
        cipher = PaillierEncrypt()
        cipher.generate_key()
        pub_key = cipher.get_public_key()
        self._pubkey_transfer.remote(obj=pub_key, role=consts.HOST, idx=-1, suffix=suffix)
        return cipher


class Host(object):
    def __init__(self):
        self._pubkey_transfer = None

    def gen_paillier_cipher_operator(self, transfer_variables, suffix=tuple()):
        self._pubkey_transfer = transfer_variables.paillier_pubkey
        pubkey = self._pubkey_transfer.get(idx=0, suffix=suffix)
        cipher = PaillierEncrypt()
        cipher.set_public_key(pubkey)
        return cipher
