#
# -*- coding: utf-8 -*-
# Copyright 2019 Red Hat
# GNU General Public License v3.0+
# (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
"""
The ios lag_interfaces 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 __future__ import absolute_import, division, print_function

__metaclass__ = type


import re
from copy import deepcopy

from ansible_collections.ansible.netcommon.plugins.module_utils.network.common import (
    utils,
)
from ansible_collections.cisco.ios.plugins.module_utils.network.ios.utils.utils import (
    get_interface_type,
    normalize_interface,
)
from ansible_collections.cisco.ios.plugins.module_utils.network.ios.argspec.lag_interfaces.lag_interfaces import (
    Lag_interfacesArgs,
)


class Lag_interfacesFacts(object):
    """ The ios_lag_interfaces fact class
    """

    def __init__(self, module, subspec="config", options="options"):
        self._module = module
        self.argument_spec = Lag_interfacesArgs.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 populate_facts(self, connection, ansible_facts, data=None):
        """ Populate the facts for interfaces
        :param connection: the device connection
        :param ansible_facts: Facts dictionary
        :param data: previously collected conf
        :rtype: dictionary
        :returns: facts
        """
        objs = []

        if not data:
            data = connection.get("show running-config | section ^interface")
        # operate on a collection of resource x
        config = ("\n" + data).split("\ninterface ")
        for conf in config:
            if conf:
                obj = self.render_config(self.generated_spec, conf)
                if obj:
                    if not obj.get("members"):
                        obj.update({"members": []})
                    objs.append(obj)

        # for appending members configured with same channel-group
        for each in range(len(objs)):
            if each < (len(objs) - 1):
                if objs[each]["name"] == objs[each + 1]["name"]:
                    objs[each]["members"].append(objs[each + 1]["members"][0])
                    del objs[each + 1]
        facts = {}

        if objs:
            facts["lag_interfaces"] = []
            params = utils.validate_config(
                self.argument_spec, {"config": objs}
            )

            for cfg in params["config"]:
                facts["lag_interfaces"].append(utils.remove_empties(cfg))
        ansible_facts["ansible_network_resources"].update(facts)

        return ansible_facts

    def render_config(self, spec, conf):
        """
        Render config as dictionary structure and delete keys
          from spec for null values

        :param spec: The facts tree, generated from the argspec
        :param conf: The configuration
        :rtype: dictionary
        :returns: The generated config
        """
        config = deepcopy(spec)
        match = re.search(r"^(\S+)", conf)
        intf = match.group(1)

        if get_interface_type(intf) == "unknown":
            return {}
        member_config = {}
        channel_group = utils.parse_conf_arg(conf, "channel-group")
        if intf.startswith("Gi"):
            config["name"] = intf
            config["members"] = []
            if channel_group:
                channel_group = channel_group.split(" ")
                id = channel_group[0]
                config["name"] = "Port-channel{0}".format(str(id))
                if "mode" in channel_group:
                    mode = channel_group[2]
                    member_config.update({"mode": mode})
                if "link" in channel_group:
                    link = channel_group[2]
                    member_config.update({"link": link})
            if member_config.get("mode") or member_config.get("link"):
                member_config["member"] = normalize_interface(intf)
                config["members"].append(member_config)

        return utils.remove_empties(config)
