# This file is part of cloud-init. See LICENSE file for license information.

"""Debug network config format conversions."""

import argparse

import json

import os

import sys

from cloudinit.sources.helpers import openstack

from cloudinit.sources import DataSourceAzure as azure

from cloudinit.sources import DataSourceOVF as ovf

from cloudinit import distros, safeyaml

from cloudinit.net import eni, netplan, network_state, sysconfig

from cloudinit import log

NAME = 'net-convert'

def get_parser(parser=None):

    """Build or extend and arg parser for net-convert utility.

    @param parser: Optional existing ArgumentParser instance representing the

        subcommand which will be extended to support the args of this utility.

    @returns: ArgumentParser with proper argument configuration.

    """

    if not parser:

        parser = argparse.ArgumentParser(prog=NAME, description=__doc__)

    parser.add_argument("-p", "--network-data", type=open,

                        metavar="PATH", required=True)

    parser.add_argument("-k", "--kind",

                        choices=['eni', 'network_data.json', 'yaml',

                                 'azure-imds', 'vmware-imc'],

                        required=True)

    parser.add_argument("-d", "--directory",

                        metavar="PATH",

                        help="directory to place output in",

                        required=True)

    parser.add_argument("-D", "--distro",

                        choices=[item for sublist in

                                 distros.OSFAMILIES.values()

                                 for item in sublist],

                        required=True)

    parser.add_argument("-m", "--mac",

                        metavar="name,mac",

                        action='append',

                        help="interface name to mac mapping")

    parser.add_argument("--debug", action='store_true',

                        help='enable debug logging to stderr.')

    parser.add_argument("-O", "--output-kind",

                        choices=['eni', 'netplan', 'sysconfig'],

                        required=True)

    return parser

def handle_args(name, args):

    if not args.directory.endswith("/"):

        args.directory += "/"

    if not os.path.isdir(args.directory):

        os.makedirs(args.directory)

    if args.debug:

        log.setupBasicLogging(level=log.DEBUG)

    else:

        log.setupBasicLogging(level=log.WARN)

    if args.mac:

        known_macs = {}

        for item in args.mac:

            iface_name, iface_mac = item.split(",", 1)

            known_macs[iface_mac] = iface_name

    else:

        known_macs = None

    net_data = args.network_data.read()

    if args.kind == "eni":

        pre_ns = eni.convert_eni_data(net_data)

    elif args.kind == "yaml":

        pre_ns = safeyaml.load(net_data)

        if 'network' in pre_ns:

            pre_ns = pre_ns.get('network')

        if args.debug:

            sys.stderr.write('\n'.join(

                ["Input YAML", safeyaml.dumps(pre_ns), ""]))

    elif args.kind == 'network_data.json':

        pre_ns = openstack.convert_net_json(

            json.loads(net_data), known_macs=known_macs)

    elif args.kind == 'azure-imds':

        pre_ns = azure.parse_network_config(json.loads(net_data))

    elif args.kind == 'vmware-imc':

        config = ovf.Config(ovf.ConfigFile(args.network_data.name))

        pre_ns = ovf.get_network_config_from_conf(config, False)

    ns = network_state.parse_net_config_data(pre_ns)

    if not ns:

        raise RuntimeError("No valid network_state object created from"

                           " input data")

    if args.debug:

        sys.stderr.write('\n'.join(

            ["", "Internal State", safeyaml.dumps(ns), ""]))

    distro_cls = distros.fetch(args.distro)

    distro = distro_cls(args.distro, {}, None)

    config = {}

    if args.output_kind == "eni":

        r_cls = eni.Renderer

        config = distro.renderer_configs.get('eni')

    elif args.output_kind == "netplan":

        r_cls = netplan.Renderer

        config = distro.renderer_configs.get('netplan')

        # don't run netplan generate/apply

        config['postcmds'] = False

        # trim leading slash

        config['netplan_path'] = config['netplan_path'][1:]

        # enable some netplan features

        config['features'] = ['dhcp-use-domains', 'ipv6-mtu']

    else:

        r_cls = sysconfig.Renderer

        config = distro.renderer_configs.get('sysconfig')

    r = r_cls(config=config)

    sys.stderr.write(''.join([

        "Read input format '%s' from '%s'.\n" % (

            args.kind, args.network_data.name),

        "Wrote output format '%s' to '%s'\n" % (

            args.output_kind, args.directory)]) + "\n")

    r.render_network_state(network_state=ns, target=args.directory)

if __name__ == '__main__':

    args = get_parser().parse_args()

    handle_args(NAME, args)

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