# -*- coding: utf-8 -*-
# pylint: disable=line-too-long,consider-using-f-string
"""Multipath TCP options
===========================

.. module:: pcapkit.const.tcp.mp_tcp_option

This module contains the constant enumeration for **Multipath TCP options**,
which is automatically generated from :class:`pcapkit.vendor.tcp.mp_tcp_option.MPTCPOption`.

"""

from aenum import IntEnum, extend_enum

__all__ = ['MPTCPOption']


class MPTCPOption(IntEnum):
    """[MPTCPOption] Multipath TCP options [:rfc:`6824`]"""

    #: Multipath Capable [:rfc:`8684, Section 3.1`]
    MP_CAPABLE = 0x0

    #: Join Connection [:rfc:`8684, Section 3.2`]
    MP_JOIN = 0x1

    #: Data Sequence Signal (Data ACK and Data Sequence Mapping) [:rfc:`8684,
    #: Section 3.3`]
    DSS = 0x2

    #: Add Address [:rfc:`8684, Section 3.4.1`]
    ADD_ADDR = 0x3

    #: Remove Address [:rfc:`8684, Section 3.4.2`]
    REMOVE_ADDR = 0x4

    #: Change Subflow Priority [:rfc:`8684, Section 3.3.8`]
    MP_PRIO = 0x5

    #: Fallback [:rfc:`8684, Section 3.7`]
    MP_FAIL = 0x6

    #: Fast Close [:rfc:`8684, Section 3.5`]
    MP_FASTCLOSE = 0x7

    #: Subflow Reset [:rfc:`8684, Section 3.6`]
    MP_TCPRST = 0x8

    #: [:rfc:`8684`]
    Reserved_for_Private_Use = 0xf

    @staticmethod
    def get(key: 'int | str', default: 'int' = -1) -> 'MPTCPOption':
        """Backport support for original codes.

        Args:
            key: Key to get enum item.
            default: Default value if not found.

        :meta private:
        """
        if isinstance(key, int):
            return MPTCPOption(key)
        if key not in MPTCPOption._member_map_:  # pylint: disable=no-member
            return extend_enum(MPTCPOption, key, default)
        return MPTCPOption[key]  # type: ignore[misc]

    @classmethod
    def _missing_(cls, value: 'int') -> 'MPTCPOption':
        """Lookup function used when value is not found.

        Args:
            value: Value to get enum item.

        """
        if not (isinstance(value, int) and 0 <= value <= 255):
            raise ValueError('%r is not a valid %s' % (value, cls.__name__))
        if 0x9 <= value <= 0xe:
            #:
            return extend_enum(cls, 'Unassigned_%d' % value, value)
        return super()._missing_(value)
