# -*- coding: utf-8 -*-
# Copyright 2021 Red Hat
# GNU General Public License v3.0+
# (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function

__metaclass__ = type

"""
The iosxr bgp_global fact class
It is in this file the configuration is collected from the device
for a given resource, parsed, and the facts tree is populated
based on the configuration.
"""

from copy import deepcopy

from ansible.module_utils.six import iteritems
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common import (
    utils,
)
from ansible_collections.cisco.iosxr.plugins.module_utils.network.iosxr.rm_templates.bgp_global import (
    Bgp_globalTemplate,
)
from ansible_collections.cisco.iosxr.plugins.module_utils.network.iosxr.argspec.bgp_global.bgp_global import (
    Bgp_globalArgs,
)
from ansible_collections.cisco.iosxr.plugins.module_utils.network.iosxr.utils.utils import (
    flatten_config,
)


class Bgp_globalFacts(object):
    """ The iosxr bgp_global facts class
    """

    def __init__(self, module, subspec="config", options="options"):
        self._module = module
        self.argument_spec = Bgp_globalArgs.argument_spec
        spec = deepcopy(self.argument_spec)
        if subspec:
            if options:
                facts_argument_spec = spec[subspec][options]
            else:
                facts_argument_spec = spec[subspec]
        else:
            facts_argument_spec = spec

        self.generated_spec = utils.generate_dict(facts_argument_spec)

    def get_config(self, connection):
        return connection.get("show running-config router bgp")

    def populate_facts(self, connection, ansible_facts, data=None):
        """ Populate the facts for Bgp_global network resource

        :param connection: the device connection
        :param ansible_facts: Facts dictionary
        :param data: previously collected conf

        :rtype: dictionary
        :returns: facts
        """
        facts = {}
        objs = []
        bgp_global_config = []
        if not data:
            data = self.get_config(connection)
        neighbor_data = flatten_config(data, "neighbor")
        rpki_server_data = flatten_config(neighbor_data, "rpki server")
        data = flatten_config(rpki_server_data, "bgp confederation peers")

        # remove address_family configs from bgp_global

        start = False
        for bgp_line in data.splitlines():
            if "address-family" in bgp_line:
                start = True
            if not start:
                bgp_global_config.append(bgp_line)
            if start and "!" in bgp_line:
                start = False

        # parse native config using the Bgp_global template
        bgp_global_parser = Bgp_globalTemplate(
            lines=bgp_global_config, module=self._module
        )
        objs = bgp_global_parser.parse()

        conf_peers = (
            objs.get("bgp", {}).get("confederation", {}).get("peers", {})
        )
        if conf_peers:
            objs["bgp"]["confederation"]["peers"] = list(conf_peers.values())

        vrfs = objs.get("vrfs", {})

        # move global vals to their correct position in facts tree
        # this is only needed for keys that are common between both global
        # and VRF contexts
        global_vals = vrfs.pop("vrf_", {})
        for key, value in iteritems(global_vals):
            if objs.get(key):
                objs[key].update(value)
            else:
                objs[key] = value
        # transform vrfs into a list
        if vrfs:
            objs["vrfs"] = sorted(
                list(objs["vrfs"].values()), key=lambda k, sk="vrf": k[sk]
            )
            for vrf in objs["vrfs"]:
                self._post_parse(vrf)
        else:
            objs["vrfs"] = []

        self._post_parse(objs)

        ansible_facts["ansible_network_resources"].pop("bgp_global", None)

        params = utils.remove_empties(
            bgp_global_parser.validate_config(
                self.argument_spec, {"config": objs}, redact=True
            )
        )

        facts["bgp_global"] = params.get("config", {})
        ansible_facts["ansible_network_resources"].update(facts)

        return ansible_facts

    def _post_parse(self, obj):
        """ Converts the intermediate data structure
            to valid format as per argspec.
        :param obj: dict
        """
        neighbors = obj.get("neighbors", [])
        if neighbors:
            obj["neighbors"] = sorted(
                list(neighbors.values()), key=lambda k, sk="neighbor": k[sk]
            )
        rpki_servers = obj.get("rpki", {}).get("servers", [])
        if rpki_servers:
            obj["rpki"]["servers"] = sorted(
                list(rpki_servers.values()), key=lambda k, sk="name": k[sk]
            )
