#
#  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.
#

import pickle
from pyspark.sql import Row

_DELIMITER = ','
NEWLINE = '\n'


def deserialize_line(line):
    return bytes.decode(line[0]), pickle.loads(bytes.fromhex(line[1]))


def serialize_line(k, v):
    return f'{_DELIMITER}'.join([k, pickle.dumps(v).hex()]) + f"{NEWLINE}"


def read_line(line_data):
    line = [str(i) for i in line_data]
    return f'{_DELIMITER}'.join(line) + f"{NEWLINE}"


def from_row(r):
    return r.key, pickle.loads(bytes.fromhex(r.value))


def to_row(k, v):
    return Row(key=k, value=pickle.dumps(v).hex())
