# Copyright (C) Nov 2020 Mellanox Technologies Ltd. All rights reserved.
#
# This software is available to you under a choice of one of two
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# General Public License (GPL) Version 2, available from the file
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# OpenIB.org BSD license below:
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#     without modification, are permitted provided that the following
#     conditions are met:
#
#      - Redistributions of source code must retain the above
#        copyright notice, this list of conditions and the following
#        disclaimer.
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#      - Redistributions in binary form must reproduce the above
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# --

import binascii
import os

from .dumper import PacketDumper
from ..constants import PacketType

__all__ = ['RawPacketDumper', 'RawHexPacketDumper']


class RawPacketDumper(PacketDumper):
    """A concrete class that represents packet dumper for raw data packets."""
    __product_type__ = PacketType.RAW.value

    def dump(self, packets):
        """Dumps a list of raw data packets into a file.

        :param list[RawPacket] packets: A list of packets to be saved
        """
        super().dump(packets)
        buffers = self.get_packets_buffers(packets)
        data = os.linesep.encode('utf-8').join(buffer for buffer in buffers)
        with open(self.path, 'wb') as f:
            f.write(data)


class RawHexPacketDumper(RawPacketDumper):
    """A concrete class that represents packet dumper for raw hexadecimal

    packets."""
    __product_type__ = PacketType.HEX.value

    @classmethod
    def get_packets_buffers(cls, packets):
        """Returns list of packets buffers from the given packets.

        :param packets: List of packets
        :return: packets buffers
        :rtype: List[bytes]
        """
        buffers = super().get_packets_buffers(packets)
        return [binascii.b2a_hex(buffer) for buffer in buffers]