#
# -*- 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 nxos acl_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.nxos.plugins.module_utils.network.nxos.argspec.acl_interfaces.acl_interfaces import (
    Acl_interfacesArgs,
)


class Acl_interfacesFacts(object):
    """The nxos acl_interfaces fact class"""

    def __init__(self, module, subspec="config", options="options"):
        self._module = module
        self.argument_spec = Acl_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 get_device_data(self, connection):
        return connection.get("show running-config | section ^interface")

    def populate_facts(self, connection, ansible_facts, data=None):
        """Populate the facts for acl_interfaces
        :param connection: the device connection
        :param ansible_facts: Facts dictionary
        :param data: previously collected conf
        :rtype: dictionary
        :returns: facts
        """
        if not data:
            data = self.get_device_data(connection)
        data = data.split("interface")

        resources = []
        for i in range(len(data)):
            intf = data[i].split("\n")
            for line in range(1, len(intf)):
                if not re.search("ip(v6)?( port)? (access-group|traffic-filter)", intf[line]):
                    intf[line] = ""
            intf = list(filter(None, intf))
            resources.append(intf)

        objs = []
        for resource in resources:
            if resource:
                obj = self.render_config(self.generated_spec, resource)
                if obj:
                    objs.append(obj)

        ansible_facts["ansible_network_resources"].pop("acl_interfaces", None)
        facts = {}
        if objs:
            params = utils.validate_config(self.argument_spec, {"config": objs})
            params = utils.remove_empties(params)
            facts["acl_interfaces"] = params["config"]

        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)
        config["name"] = conf[0].strip()
        config["access_groups"] = []
        v4 = {"afi": "ipv4", "acls": []}
        v6 = {"afi": "ipv6", "acls": []}
        for c in conf[1:]:
            if c:
                acl4 = re.search(
                    r"ip(?P<port>\sport)?\saccess-group\s(?P<name>\S+)\s(?P<dir>in|out)",
                    c,
                )
                acl6 = re.search(
                    r"ipv6(?P<port>\sport)?\straffic-filter\s(?P<name>\S+)\s(?P<dir>in|out)",
                    c,
                )
                if acl4:
                    v4["acls"].append(self._parse(acl4))
                elif acl6:
                    v6["acls"].append(self._parse(acl6))

        if len(v4["acls"]) > 0:
            config["access_groups"].append(v4)
        if len(v6["acls"]) > 0:
            config["access_groups"].append(v6)

        return utils.remove_empties(config)

    def _parse(self, data):
        return {
            "name": data.group("name").strip(),
            "direction": data.group("dir").strip(),
            "port": True if data.group("port") else None,
        }
