# SPDX-License-Identifier: GPL-2.0-or-later
#
# Copyright (C) 2010-2012 Red Hat, Inc.
#
# Authors:
# Thomas Woerner <twoerner@redhat.com>

ALREADY_ENABLED = 11
NOT_ENABLED = 12
COMMAND_FAILED = 13
NO_IPV6_NAT = 14
PANIC_MODE = 15
ZONE_ALREADY_SET = 16
UNKNOWN_INTERFACE = 17
ZONE_CONFLICT = 18
BUILTIN_CHAIN = 19
EBTABLES_NO_REJECT = 20
NOT_OVERLOADABLE = 21
NO_DEFAULTS = 22
BUILTIN_ZONE = 23
BUILTIN_SERVICE = 24
BUILTIN_ICMPTYPE = 25
NAME_CONFLICT = 26
NAME_MISMATCH = 27
PARSE_ERROR = 28
ACCESS_DENIED = 29
UNKNOWN_SOURCE = 30
RT_TO_PERM_FAILED = 31
IPSET_WITH_TIMEOUT = 32
BUILTIN_IPSET = 33
ALREADY_SET = 34
MISSING_IMPORT = 35
DBUS_ERROR = 36
BUILTIN_HELPER = 37
NOT_APPLIED = 38

INVALID_ACTION = 100
INVALID_SERVICE = 101
INVALID_PORT = 102
INVALID_PROTOCOL = 103
INVALID_INTERFACE = 104
INVALID_ADDR = 105
INVALID_FORWARD = 106
INVALID_ICMPTYPE = 107
INVALID_TABLE = 108
INVALID_CHAIN = 109
INVALID_TARGET = 110
INVALID_IPV = 111
INVALID_ZONE = 112
INVALID_PROPERTY = 113
INVALID_VALUE = 114
INVALID_OBJECT = 115
INVALID_NAME = 116
INVALID_FILENAME = 117
INVALID_DIRECTORY = 118
INVALID_TYPE = 119
INVALID_SETTING = 120
INVALID_DESTINATION = 121
INVALID_RULE = 122
INVALID_LIMIT = 123
INVALID_FAMILY = 124
INVALID_LOG_LEVEL = 125
INVALID_AUDIT_TYPE = 126
INVALID_MARK = 127
INVALID_CONTEXT = 128
INVALID_COMMAND = 129
INVALID_USER = 130
INVALID_UID = 131
INVALID_MODULE = 132
INVALID_PASSTHROUGH = 133
INVALID_MAC = 134
INVALID_IPSET = 135
INVALID_ENTRY = 136
INVALID_OPTION = 137
INVALID_HELPER = 138
INVALID_PRIORITY = 139
INVALID_POLICY = 140
INVALID_LOG_PREFIX = 141
INVALID_NFLOG_GROUP = 142
INVALID_NFLOG_QUEUE = 143
INVALID_SOURCE = 144

MISSING_TABLE = 200
MISSING_CHAIN = 201
MISSING_PORT = 202
MISSING_PROTOCOL = 203
MISSING_ADDR = 204
MISSING_NAME = 205
MISSING_SETTING = 206
MISSING_FAMILY = 207

RUNNING_BUT_FAILED = 251
NOT_RUNNING = 252
NOT_AUTHORIZED = 253
UNKNOWN_ERROR = 254

import sys


class FirewallError(Exception):
    def __init__(self, code, msg=None):
        self.code = code
        self.msg = msg

    def __repr__(self):
        return "%s(%r, %r)" % (self.__class__, self.code, self.msg)

    def __str__(self):
        if self.msg:
            return "%s: %s" % (self.errors[self.code], self.msg)
        return self.errors[self.code]

    def get_code(msg):
        if msg is not None and ":" in msg:
            idx = msg.index(":")
            ecode = msg[:idx]
        else:
            ecode = msg

        try:
            code = FirewallError.codes[ecode]
        except KeyError:
            code = UNKNOWN_ERROR

        return code

    get_code = staticmethod(get_code)


mod = sys.modules[FirewallError.__module__]
FirewallError.errors = {
    getattr(mod, varname): varname
    for varname in dir(mod)
    if not varname.startswith("_") and type(getattr(mod, varname)) == int
}
FirewallError.codes = {
    FirewallError.errors[code]: code for code in FirewallError.errors
}

###############################################################################


class BugError(Exception):
    """Indicates that there is a bug in the code. You probably don't
    want to catch this, but fix the bug."""

    def __init__(self, msg=None):
        if msg is None:
            msg = "should not be reached"
        super().__init__(f"BUG: {msg}")