"""
//  -------------------------------------------------------------
//  author        Giga
//  project       qeeqbox/honeypots
//  email         gigaqeeq@gmail.com
//  description   app.py (CLI)
//  licensee      AGPL-3.0
//  -------------------------------------------------------------
//  contributors list qeeqbox/honeypots/graphs/contributors
//  -------------------------------------------------------------
"""

from warnings import filterwarnings

filterwarnings(action="ignore", module=".*OpenSSL.*")
filterwarnings(action="ignore", module=".*scapy.*")

from twisted.internet.protocol import DatagramProtocol
from twisted.internet import reactor
from twisted.python import log as tlog
from subprocess import Popen
from os import path, getenv
from scapy.all import SNMP
from honeypots.helper import (
    close_port_wrapper,
    get_free_port,
    kill_server_wrapper,
    server_arguments,
    setup_logger,
    disable_logger,
    set_local_vars,
    check_if_server_is_running,
)
from uuid import uuid4
from contextlib import suppress


class QSNMPServer:
    def __init__(self, **kwargs):
        self.auto_disabled = None
        self.process = None
        self.uuid = "honeypotslogger" + "_" + __class__.__name__ + "_" + str(uuid4())[:8]
        self.config = kwargs.get("config", "")
        if self.config:
            self.logs = setup_logger(__class__.__name__, self.uuid, self.config)
            set_local_vars(self, self.config)
        else:
            self.logs = setup_logger(__class__.__name__, self.uuid, None)
        self.ip = kwargs.get("ip", None) or (hasattr(self, "ip") and self.ip) or "0.0.0.0"
        self.port = (
            (kwargs.get("port", None) and int(kwargs.get("port", None)))
            or (hasattr(self, "port") and self.port)
            or 161
        )
        self.options = (
            kwargs.get("options", "")
            or (hasattr(self, "options") and self.options)
            or getenv("HONEYPOTS_OPTIONS", "")
            or ""
        )
        disable_logger(1, tlog)

    def snmp_server_main(self):
        _q_s = self

        class CustomDatagramProtocolProtocol(DatagramProtocol):
            def parse_snmp(self, data):
                version = "UnKnown"
                community = "UnKnown"
                oids = "UnKnown"
                with suppress(Exception):
                    parsed_snmp = SNMP(data)
                    community = parsed_snmp.community.val
                    version = parsed_snmp.version.val
                    oids = " ".join([item.oid.val for item in parsed_snmp.PDU.varbindlist])
                return version, community, oids

            def datagramReceived(self, data, addr):
                _q_s.logs.info(
                    {
                        "server": "snmp_server",
                        "action": "connection",
                        "status": "fail",
                        "src_ip": addr[0],
                        "src_port": addr[1],
                        "dest_ip": _q_s.ip,
                        "dest_port": _q_s.port,
                    }
                )
                version, community, oids = self.parse_snmp(data)
                if version or community or oids:
                    _q_s.logs.info(
                        {
                            "server": "snmp_server",
                            "action": "query",
                            "status": "success",
                            "src_ip": addr[0],
                            "src_port": addr[1],
                            "dest_ip": _q_s.ip,
                            "dest_port": _q_s.port,
                            "data": {"version": version, "community": community, "oids": oids},
                        }
                    )
                    self.transport.write("Error", addr)

                self.transport.loseConnection()

        reactor.listenUDP(
            port=self.port, protocol=CustomDatagramProtocolProtocol(), interface=self.ip
        )
        reactor.run()

    def run_server(self, process=False, auto=False):
        status = "error"
        run = False
        if process:
            if auto and not self.auto_disabled:
                port = get_free_port()
                if port > 0:
                    self.port = port
                    run = True
            elif self.close_port() and self.kill_server():
                run = True

            if run:
                self.process = Popen(
                    [
                        "python3",
                        path.realpath(__file__),
                        "--custom",
                        "--ip",
                        str(self.ip),
                        "--port",
                        str(self.port),
                        "--options",
                        str(self.options),
                        "--config",
                        str(self.config),
                        "--uuid",
                        str(self.uuid),
                    ]
                )
                if self.process.poll() is None and check_if_server_is_running(self.uuid):
                    status = "success"

            self.logs.info(
                {
                    "server": "snmp_server",
                    "action": "process",
                    "status": status,
                    "src_ip": self.ip,
                    "src_port": self.port,
                    "dest_ip": self.ip,
                    "dest_port": self.port,
                }
            )

            if status == "success":
                return True
            else:
                self.kill_server()
                return False
        else:
            self.snmp_server_main()

    def close_port(self):
        ret = close_port_wrapper("snmp_server", self.ip, self.port, self.logs)
        return ret

    def kill_server(self):
        ret = kill_server_wrapper("snmp_server", self.uuid, self.process)
        return ret

    def test_server(self, ip=None, port=None, username=None, password=None):
        with suppress(Exception):
            from pysnmp.hlapi import (
                getCmd,
                SnmpEngine,
                CommunityData,
                UdpTransportTarget,
                ContextData,
                ObjectType,
                ObjectIdentity,
            )

            _ip = ip or self.ip
            _port = port or self.port
            g = getCmd(
                SnmpEngine(),
                CommunityData("public"),
                UdpTransportTarget((_ip, _port)),
                ContextData(),
                ObjectType(ObjectIdentity("1.3.6.1.4.1.9.9.618.1.4.1.0")),
            )
            errorIndication, errorStatus, errorIndex, varBinds = next(g)


if __name__ == "__main__":
    parsed = server_arguments()
    if parsed.docker or parsed.aws or parsed.custom:
        QSNMPServer = QSNMPServer(
            ip=parsed.ip, port=parsed.port, options=parsed.options, config=parsed.config
        )
        QSNMPServer.run_server()
