# Pyrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2017-2019 Dan Tès <https://github.com/delivrance>
#
# This file is part of Pyrogram.
#
# Pyrogram is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pyrogram is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.

from gzip import compress, decompress
from io import BytesIO

from .object import Object
from .primitives import Int, Bytes


class GzipPacked(Object):
    ID = 0x3072cfa1

    def __init__(self, packed_data: Object):
        self.packed_data = packed_data

    @staticmethod
    def read(b: BytesIO, *args) -> "GzipPacked":
        # Return the Object itself instead of a GzipPacked wrapping it
        return Object.read(
            BytesIO(
                decompress(
                    Bytes.read(b)
                )
            )
        )

    def write(self) -> bytes:
        b = BytesIO()

        b.write(Int(self.ID, False))

        b.write(
            Bytes(
                compress(
                    self.packed_data.write()
                )
            )
        )

        return b.getvalue()