#!/usr/bin/python
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
#
from __future__ import absolute_import, division, print_function

__metaclass__ = type
DOCUMENTATION = """
module: ios_vlan
author: Trishna Guha (@trishnaguha)
short_description: (deprecated, removed after 2022-06-01) Manage VLANs on IOS network
  devices
description:
- This module provides declarative management of VLANs on Cisco IOS network devices.
version_added: 1.0.0
deprecated:
  alternative: ios_vlans
  why: Newer and updated modules released with more functionality in Ansible 2.9
  removed_at_date: '2022-06-01'
notes:
  - Tested against IOS 15.2
options:
  name:
    description:
    - Name of the VLAN.
    type: str
  vlan_id:
    description:
    - ID of the VLAN. Range 1-4094.
    type: int
  interfaces:
    description:
    - List of interfaces that should be associated to the VLAN.
    type: list
    elements: str
  associated_interfaces:
    description:
    - This is a intent option and checks the operational state of the for given vlan
      C(name) for associated interfaces. If the value in the C(associated_interfaces)
      does not match with the operational state of vlan interfaces on device it will
      result in failure.
    type: list
    elements: str
  delay:
    description:
    - Delay the play should wait to check for declarative intent params values.
    default: 10
    type: int
  aggregate:
    description: List of VLANs definitions.
    type: list
    elements: dict
    suboptions:
      name:
        description:
        - Name of the VLAN.
        type: str
      vlan_id:
        description:
        - ID of the VLAN. Range 1-4094.
        required: true
        type: str
      interfaces:
        description:
        - List of interfaces that should be associated to the VLAN.
        type: list
        elements: str
      associated_interfaces:
        description:
        - This is a intent option and checks the operational state of the for given vlan
          C(name) for associated interfaces. If the value in the C(associated_interfaces)
          does not match with the operational state of vlan interfaces on device it will
          result in failure.
        type: list
        elements: str
      delay:
        description:
        - Delay the play should wait to check for declarative intent params values.
        type: int
      state:
        description:
        - State of the VLAN configuration.
        type: str
        choices:
        - present
        - absent
        - active
        - suspend
  purge:
    description:
    - Purge VLANs not defined in the I(aggregate) parameter.
    default: false
    type: bool
  state:
    description:
    - State of the VLAN configuration.
    default: present
    choices:
    - present
    - absent
    - active
    - suspend
    type: str
extends_documentation_fragment:
- cisco.ios.ios


"""
EXAMPLES = """
- name: Create vlan
  cisco.ios.ios_vlan:
    vlan_id: 100
    name: test-vlan
    state: present

- name: Add interfaces to VLAN
  cisco.ios.ios_vlan:
    vlan_id: 100
    interfaces:
    - GigabitEthernet0/0
    - GigabitEthernet0/1

- name: Check if interfaces is assigned to VLAN
  cisco.ios.ios_vlan:
    vlan_id: 100
    associated_interfaces:
    - GigabitEthernet0/0
    - GigabitEthernet0/1

- name: Delete vlan
  cisco.ios.ios_vlan:
    vlan_id: 100
    state: absent

- name: Add vlan using aggregate
  cisco.ios.ios_vlan:
    aggregate:
    - {vlan_id: 100, name: test-vlan, interfaces: [GigabitEthernet0/1, GigabitEthernet0/2],
      delay: 15, state: suspend}
    - {vlan_id: 101, name: test-vlan, interfaces: GigabitEthernet0/3}

- name: Move interfaces to a different VLAN
  cisco.ios.ios_vlan:
    vlan_id: 102
    interfaces:
    - GigabitEthernet0/0
    - GigabitEthernet0/1
"""
RETURN = """
commands:
  description: The list of configuration mode commands to send to the device
  returned: always
  type: list
  sample:
    - vlan 100
    - name test-vlan
"""
import re
import time
from copy import deepcopy
from ansible.module_utils.basic import AnsibleModule
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.utils import (
    remove_default_spec,
)
from ansible_collections.cisco.ios.plugins.module_utils.network.ios.ios import (
    load_config,
    run_commands,
    normalize_interface,
)
from ansible_collections.cisco.ios.plugins.module_utils.network.ios.ios import (
    ios_argument_spec,
)


def search_obj_in_list(vlan_id, lst):
    for o in lst:
        if o["vlan_id"] == vlan_id:
            return o


def map_obj_to_commands(updates, module):
    commands = list()
    want, have = updates
    purge = module.params["purge"]
    for w in want:
        vlan_id = w["vlan_id"]
        name = w["name"]
        interfaces = w["interfaces"]
        state = w["state"]
        obj_in_have = search_obj_in_list(vlan_id, have)
        if state == "absent":
            if obj_in_have:
                commands.append("no vlan {0}".format(vlan_id))
        elif state == "present":
            if not obj_in_have:
                commands.append("vlan {0}".format(vlan_id))
                if name:
                    commands.append("name {0}".format(name))
                if interfaces:
                    for i in interfaces:
                        commands.append("interface {0}".format(i))
                        commands.append("switchport mode access")
                        commands.append(
                            "switchport access vlan {0}".format(vlan_id)
                        )
            else:
                if name:
                    if name != obj_in_have["name"]:
                        commands.append("vlan {0}".format(vlan_id))
                        commands.append("name {0}".format(name))
                if interfaces:
                    if not obj_in_have["interfaces"]:
                        for i in interfaces:
                            commands.append("vlan {0}".format(vlan_id))
                            commands.append("interface {0}".format(i))
                            commands.append("switchport mode access")
                            commands.append(
                                "switchport access vlan {0}".format(vlan_id)
                            )
                    elif set(interfaces) != set(obj_in_have["interfaces"]):
                        missing_interfaces = list(
                            set(interfaces) - set(obj_in_have["interfaces"])
                        )
                        for i in missing_interfaces:
                            commands.append("vlan {0}".format(vlan_id))
                            commands.append("interface {0}".format(i))
                            commands.append("switchport mode access")
                            commands.append(
                                "switchport access vlan {0}".format(vlan_id)
                            )
                        superfluous_interfaces = list(
                            set(obj_in_have["interfaces"]) - set(interfaces)
                        )
                        for i in superfluous_interfaces:
                            commands.append("vlan {0}".format(vlan_id))
                            commands.append("interface {0}".format(i))
                            commands.append("switchport mode access")
                            commands.append(
                                "no switchport access vlan {0}".format(vlan_id)
                            )
        else:
            commands.append("vlan {0}".format(vlan_id))
            if name:
                commands.append("name {0}".format(name))
            commands.append("state {0}".format(state))
    if purge:
        for h in have:
            obj_in_want = search_obj_in_list(h["vlan_id"], want)
            if not obj_in_want and h["vlan_id"] != "1":
                commands.append("no vlan {0}".format(h["vlan_id"]))
    return commands


def map_params_to_obj(module):
    obj = []
    aggregate = module.params.get("aggregate")
    if aggregate:
        for item in aggregate:
            for key in item:
                if item.get(key) is None:
                    item[key] = module.params[key]
            d = item.copy()
            d["vlan_id"] = str(d["vlan_id"])
            obj.append(d)
    else:
        obj.append(
            {
                "vlan_id": str(module.params["vlan_id"]),
                "name": module.params["name"],
                "interfaces": module.params["interfaces"],
                "associated_interfaces": module.params[
                    "associated_interfaces"
                ],
                "state": module.params["state"],
            }
        )
    return obj


def parse_to_logical_rows(out):
    started_yielding = False
    cur_row = []
    for l in out.splitlines()[2:]:
        if not l:
            """Skip empty lines."""
            continue
        if "0" < l[0] <= "9":
            """Line starting with a number."""
            if started_yielding:
                yield cur_row
                cur_row = []  # Reset it to hold a next chunk
            started_yielding = True
        cur_row.append(l)
    yield cur_row


def map_ports_str_to_list(ports_str):
    return list(
        filter(
            bool,
            (normalize_interface(p.strip()) for p in ports_str.split(", ")),
        )
    )


def parse_to_obj(logical_rows):
    first_row = logical_rows[0]
    rest_rows = logical_rows[1:]
    obj = re.match(
        "(?P<vlan_id>\\d+)\\s+(?P<name>[^\\s]+)\\s+(?P<state>[^\\s]+)\\s*(?P<interfaces>.*)",
        first_row,
    ).groupdict()
    if obj["state"] == "suspended":
        obj["state"] = "suspend"
    obj["interfaces"] = map_ports_str_to_list(obj["interfaces"])
    obj["interfaces"].extend(
        prts_r for prts in rest_rows for prts_r in map_ports_str_to_list(prts)
    )
    return obj


def parse_vlan_brief(vlan_out):
    return [parse_to_obj(r) for r in parse_to_logical_rows(vlan_out)]


def map_config_to_obj(module):
    return parse_vlan_brief(run_commands(module, ["show vlan brief"])[0])


def check_declarative_intent_params(want, module, result):
    have = None
    is_delay = False
    for w in want:
        if w.get("associated_interfaces") is None:
            continue
        if result["changed"] and not is_delay:
            time.sleep(module.params["delay"])
            is_delay = True
        if have is None:
            have = map_config_to_obj(module)
        for i in w["associated_interfaces"]:
            obj_in_have = search_obj_in_list(w["vlan_id"], have)
            if (
                obj_in_have
                and "interfaces" in obj_in_have
                and i not in obj_in_have["interfaces"]
            ):
                module.fail_json(
                    msg="Interface %s not configured on vlan %s"
                    % (i, w["vlan_id"])
                )


def main():
    """ main entry point for module execution
    """
    element_spec = dict(
        vlan_id=dict(type="int"),
        name=dict(),
        interfaces=dict(type="list", elements="str"),
        associated_interfaces=dict(type="list", elements="str"),
        delay=dict(default=10, type="int"),
        state=dict(
            default="present",
            choices=["present", "absent", "active", "suspend"],
        ),
    )
    aggregate_spec = deepcopy(element_spec)
    aggregate_spec["vlan_id"] = dict(required=True)
    # remove default in aggregate spec, to handle common arguments
    remove_default_spec(aggregate_spec)
    argument_spec = dict(
        aggregate=dict(type="list", elements="dict", options=aggregate_spec),
        purge=dict(default=False, type="bool"),
    )
    argument_spec.update(element_spec)
    argument_spec.update(ios_argument_spec)
    required_one_of = [["vlan_id", "aggregate"]]
    mutually_exclusive = [["vlan_id", "aggregate"]]
    module = AnsibleModule(
        argument_spec=argument_spec,
        required_one_of=required_one_of,
        mutually_exclusive=mutually_exclusive,
        supports_check_mode=True,
    )
    warnings = list()
    result = {"changed": False}
    if warnings:
        result["warnings"] = warnings
    want = map_params_to_obj(module)
    have = map_config_to_obj(module)
    commands = map_obj_to_commands((want, have), module)
    result["commands"] = commands
    if commands:
        if not module.check_mode:
            load_config(module, commands)
        result["changed"] = True
    check_declarative_intent_params(want, module, result)
    module.exit_json(**result)


if __name__ == "__main__":
    main()
