#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# This file is part of dnmgmt, a number resource management system
# Licensed under GNU General Public License v3 or later
# Written by Sebastian Lohff (seba@someserver.de)

import argparse
import json

import sys
import re
import os
import django
import ipaddress

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "dnmgmt.settings")
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR)
django.setup()


from whoisdb.models import ASBlock, ASNumber, Contact, Maintainer, InetNum

__VERSION__ = '0.1'

def _parser():
    parser = argparse.ArgumentParser(
                 #prog='foo',
                 #description='do some awesome foo',
    )

    #parser.add_argument("-p", "--port", default=2323, type=int, help="Your port")
    #parser.add_argument("-v", "--verbose", default=False, action="store_true", help="Be more verbose")
    parser.add_argument("-j", "--json", type=argparse.FileType('r'), required=True, help="Path to json file")

    parser.add_argument("--version", action="version", version="%(prog)s " + __VERSION__)

    return parser

def main():
    parser = _parser()
    args = parser.parse_args()

    defContact = Contact.objects.get(handle="UNKNOWN-DN")
    defMnt = Maintainer.objects.get(handle="DARKNET-MNT")
    blocks = [
        ASBlock.objects.get(handle="TRA1-ASB"),
        ASBlock.objects.get(handle="UAB1-ASB")
    ]
    ranges = [
        InetNum.objects.get(handle="TRA1-NET"),
        InetNum.objects.get(handle="DEF4-NET"),
        InetNum.objects.get(handle="DEF6-NET"),
        InetNum.objects.get(handle="MISC6-NET"),
        InetNum.objects.get(handle="LTRA1-NET"),
        InetNum.objects.get(handle="MAIN4-NET"),
    ]


    data = json.load(args.json)
    print(data.keys())
    for k, v in data["handles"].items():
        print(k, v["person"])
    for asn in data["as"]:
        print(asn)
        if ASNumber.objects.filter(number=asn["number"]).count() > 0:
            continue

        obj = ASNumber(number=asn["number"])
        block = None
        for block in blocks:
            if obj.number >= block.asBegin and obj.number <= block.asEnd:
                obj.asblock = block
                break
        else:
            raise ValueError("AS %d does not fit a block" % asn["number"])

        if len(asn['admin_c']) >= 1:
            name = data["handles"][asn["admin_c"][0]]["person"]
            obj.name = "Imported AS of %s" % name
            obj.handle = ASNumber.genGenericHandle(re.sub("[^a-zA-Z0-9 ]", "", name))
        else:
            obj.name = "Imported AS without admin info"
            obj.handle = ASNumber.genGenericHandle("Unknown Imported AS")
        obj.description = "Object has been imported from old DB and has not yet been edited"
        obj.save()
        obj.mnt_by.add(defMnt)
        obj.admin_c.add(defContact)
        obj.save()

    for net in data["network"]:
        print(net)
        network = ipaddress.ip_network(net["prefix"])

        if InetNum.objects.filter(address=str(network.network_address), netmask=network.prefixlen).count() > 0:
            continue

        origin = None
        if net["origin"]:
            origin = ASNumber.objects.get(number=net["origin"])
        obj = InetNum(address=str(network.network_address), netmask=network.prefixlen)
        obj.protocol = InetNum.IPv4 if network.version == 4 else InetNum.IPv6

        x = list(filter(lambda _x: _x['number'] == net["origin"], data["as"]))
        if len(x) > 0 and x[0]["admin_c"]:
            name = data["handles"][x[0]["admin_c"][0]]["person"]
            obj.name = "Imported Network of %s" % name
            obj.handle = InetNum.genGenericHandle(re.sub("[^a-zA-Z0-9 ]", "", name))
        else:
            obj.name = "Imported Network without admin info"
            obj.handle = InetNum.genGenericHandle("Unknown Imported Network")
        obj.description = "Object has been imported from old DB and has not yet been edited"

        for r in ranges:
            if network.network_address in r.getNetwork():
                obj.parent_range = r
                break
        else:
            raise ValueError("%s did not fit in any netblock" % network)

        obj.save()

        obj.mnt_by.add(defMnt)
        obj.admin_c.add(defContact)
        if origin:
            obj.origin_as.add(origin)
        obj.save()

if __name__ == '__main__':
    main()