import logging
import random as rnd

import scapy.layers.inet as inet
import scapy.utils

import Attack.AttackParameters as atkParam
import Attack.BaseAttack as BaseAttack
import ID2TLib.Utility as Util

logging.getLogger("scapy.runtime").setLevel(logging.ERROR)

# noinspection PyPep8


class SalityBotnet(BaseAttack.BaseAttack):
    template_attack_pcap_path = Util.RESOURCE_DIR + "/../resources/sality_botnet.pcap"

    def __init__(self):
        """
        Creates a new instance of the Sality botnet.
        """
        # Initialize attack
        super(SalityBotnet, self).__init__("Sality Botnet", "Injects an Sality botnet'",
                                           "Botnet")

        self.pkt_num = 0
        self.path_attack_pcap = None

        # Define allowed parameters and their type
        self.supported_params.update({
            atkParam.Parameter.MAC_SOURCE: atkParam.ParameterTypes.TYPE_MAC_ADDRESS,
            atkParam.Parameter.IP_SOURCE: atkParam.ParameterTypes.TYPE_IP_ADDRESS,
            atkParam.Parameter.INJECT_AT_TIMESTAMP: atkParam.ParameterTypes.TYPE_FLOAT,
            atkParam.Parameter.INJECT_AFTER_PACKET: atkParam.ParameterTypes.TYPE_PACKET_POSITION,
            atkParam.Parameter.PACKET_LIMIT_PER_SECOND: atkParam.ParameterTypes.TYPE_FLOAT
        })

    def init_params(self):
        """
        Initialize the parameters of this attack using the user supplied command line parameters.
        Use the provided statistics to calculate default parameters and to process user
        supplied queries.
        """
        # PARAMETERS: initialize with default utilsvalues
        # (values are overwritten if user specifies them)
        most_used_ip_address = self.statistics.get_most_used_ip_address()

        self.add_param_value(atkParam.Parameter.IP_SOURCE, most_used_ip_address)
        self.add_param_value(atkParam.Parameter.MAC_SOURCE, self.statistics.get_mac_address(most_used_ip_address))

        # Attack configuration
        self.add_param_value(atkParam.Parameter.INJECT_AFTER_PACKET, rnd.randint(0, self.statistics.get_packet_count()))
        self.add_param_value(atkParam.Parameter.PACKET_LIMIT_PER_SECOND,
                             (self.statistics.get_pps_sent(most_used_ip_address) +
                              self.statistics.get_pps_received(most_used_ip_address)) / 2)

    def generate_attack_packets(self):
        """
        Creates the attack packets.
        """

        # Timestamp
        timestamp_next_pkt = self.get_param_value(atkParam.Parameter.INJECT_AT_TIMESTAMP)

        pps = self.get_param_value(atkParam.Parameter.PACKET_LIMIT_PER_SECOND)

        # Calculate complement packet rates of BG traffic per interval
        complement_interval_pps = self.statistics.calculate_complement_packet_rates(pps)

        # Initialize parameters
        self.packets = []
        mac_source = self.get_param_value(atkParam.Parameter.MAC_SOURCE)
        ip_source = self.get_param_value(atkParam.Parameter.IP_SOURCE)

        # Pick a DNS server from the background traffic
        ip_dns_server = self.statistics.process_db_query(
            "SELECT ipAddress FROM ip_protocols WHERE protocolName='DNS' AND protocolCount=(SELECT MAX(protocolCount) "
            "FROM ip_protocols WHERE protocolName='DNS');")
        ip_dns_server = Util.handle_most_used_outputs(ip_dns_server)
        if not ip_dns_server or ip_source == ip_dns_server:
            ip_dns_server = self.statistics.get_random_ip_address()
        mac_dns_server = self.statistics.get_mac_address(ip_dns_server)

        # Bot original config in the template PCAP
        origin_mac_src = "08:00:27:e5:d7:b0"
        origin_ip_src = "10.0.2.15"

        origin_mac_dns_server = "52:54:00:12:35:02"
        origin_ip_dns_server = "10.0.2.2"

        ttl_map = {}

        ip_map = {origin_ip_src: ip_source, origin_ip_dns_server: ip_dns_server}
        mac_map = {origin_mac_src: mac_source, origin_mac_dns_server: mac_dns_server}

        # Inject Sality botnet
        # Read sality_botnet pcap file
        exploit_raw_packets = scapy.utils.RawPcapReader(self.template_attack_pcap_path)

        for self.pkt_num, pkt in enumerate(exploit_raw_packets):
            eth_frame = inet.Ether(pkt[0])
            ip_pkt = eth_frame.payload

            # Ether
            if eth_frame.getfieldval("src") in mac_map:
                eth_frame.setfieldval("src", mac_map[eth_frame.getfieldval("src")])
            if eth_frame.getfieldval("dst") in mac_map:
                eth_frame.setfieldval("dst", mac_map[eth_frame.getfieldval("dst")])

            # IP
            if ip_pkt.getfieldval("src") in ip_map:
                ip_pkt.setfieldval("src", ip_map[ip_pkt.getfieldval("src")])
            if ip_pkt.getfieldval("dst") in ip_map:
                ip_pkt.setfieldval("dst", ip_map[ip_pkt.getfieldval("dst")])

            # TTL
            if ip_pkt.getfieldval("ttl") not in ttl_map:
                source_ttl = self.statistics.get_most_used_ttl(ip_pkt.getfieldval("src"))
                if not source_ttl:
                    source_ttl = self.statistics.process_db_query("SELECT ttlValue FROM ip_ttl;")
                    if isinstance(source_ttl, list):
                        source_ttl = rnd.choice(source_ttl)
                ttl_map[ip_pkt.getfieldval("ttl")] = source_ttl
            ip_pkt.setfieldval("ttl", ttl_map[ip_pkt.getfieldval("ttl")])

            new_pkt = (eth_frame / ip_pkt)
            new_pkt.time = timestamp_next_pkt

            pps = max(Util.get_interval_pps(complement_interval_pps, timestamp_next_pkt), 10)
            timestamp_next_pkt = Util.update_timestamp(timestamp_next_pkt, pps)

            self.packets.append(new_pkt)

        exploit_raw_packets.close()

    def generate_attack_pcap(self):
        """
        Creates a pcap containing the attack packets.

        :return: The location of the generated pcap file.
        """
        # Store timestamp of first packet (for attack label)
        self.attack_start_utime = self.packets[0].time
        self.attack_end_utime = self.packets[-1].time

        if len(self.packets) > 0:
            self.packets = sorted(self.packets, key=lambda pkt: pkt.time)
            self.path_attack_pcap = self.write_attack_pcap(self.packets, True, self.path_attack_pcap)

        # return packets sorted by packet time_sec_start
        # pkt_num+1: because pkt_num starts at 0
        return self.pkt_num + 1, self.path_attack_pcap