#!/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: nxos_acl_interface
extends_documentation_fragment:
- cisco.nxos.nxos
short_description: (deprecated, removed after 2022-06-01) Manages applying
  ACLs to interfaces.
description:
- Manages applying ACLs to interfaces.
version_added: 1.0.0
deprecated:
  alternative: nxos_acl_interfaces
  why: Updated modules released with more functionality
  removed_at_date: '2022-06-01'
author:
- Jason Edelman (@jedelman8)
- Gabriele Gerbino (@GGabriele)
options:
  name:
    description:
    - Case sensitive name of the access list (ACL).
    required: true
  interface:
    description:
    - Full name of interface, e.g. I(Ethernet1/1).
    required: true
  direction:
    description:
    - Direction ACL to be applied in on the interface.
    required: true
    choices:
    - ingress
    - egress
  state:
    description:
    - Specify desired state of the resource.
    required: false
    default: present
    choices:
    - present
    - absent


"""

EXAMPLES = """
- name: apply egress acl to ethernet1/41
  cisco.nxos.nxos_acl_interface:
    name: ANSIBLE
    interface: ethernet1/41
    direction: egress
    state: present
"""

RETURN = """
acl_applied_to:
    description: list of interfaces the ACL is applied to
    returned: always
    type: list
    sample: [{"acl_type": "Router ACL", "direction": "egress",
            "interface": "Ethernet1/41", "name": "ANSIBLE"}]
commands:
    description: commands sent to the device
    returned: always
    type: list
    sample: ["interface ethernet1/41", "ip access-group ANSIBLE out"]
"""
import re

from ansible_collections.cisco.nxos.plugins.module_utils.network.nxos.nxos import (
    load_config,
    run_commands,
)
from ansible_collections.cisco.nxos.plugins.module_utils.network.nxos.nxos import (
    nxos_argument_spec,
)
from ansible.module_utils.basic import AnsibleModule


def check_for_acl_int_present(module, name, intf, direction):
    # Need to Capitalize the interface name as the nxos
    # output has capitalization
    command = [
        {
            "command": "show running-config aclmgr | section {0}".format(
                intf.title()
            ),
            "output": "text",
        }
    ]
    body = run_commands(module, command)

    if direction == "ingress":
        mdir = "in"
    elif direction == "egress":
        mdir = "out"

    match = re.search(
        "ip access-group {0} {1}".format(name, mdir), str(body[0])
    )
    return bool(match)


def apply_acl(proposed):
    commands = []

    commands.append("interface " + proposed.get("interface"))
    direction = proposed.get("direction")
    if direction == "egress":
        cmd = "ip access-group {0} {1}".format(proposed.get("name"), "out")
    elif direction == "ingress":
        cmd = "ip access-group {0} {1}".format(proposed.get("name"), "in")
    commands.append(cmd)

    return commands


def remove_acl(proposed):
    commands = []

    commands.append("interface " + proposed.get("interface"))
    direction = proposed.get("direction")
    if direction == "egress":
        cmd = "no ip access-group {0} {1}".format(proposed.get("name"), "out")
    elif direction == "ingress":
        cmd = "no ip access-group {0} {1}".format(proposed.get("name"), "in")
    commands.append(cmd)

    return commands


def flatten_list(command_lists):
    flat_command_list = []
    for command in command_lists:
        if isinstance(command, list):
            flat_command_list.extend(command)
        else:
            flat_command_list.append(command)
    return flat_command_list


def main():
    argument_spec = dict(
        name=dict(required=False, type="str"),
        interface=dict(required=True),
        direction=dict(required=True, choices=["egress", "ingress"]),
        state=dict(choices=["absent", "present"], default="present"),
    )

    argument_spec.update(nxos_argument_spec)

    module = AnsibleModule(
        argument_spec=argument_spec, supports_check_mode=True
    )

    warnings = list()

    results = dict(changed=False, warnings=warnings)

    state = module.params["state"]
    name = module.params["name"]
    interface = module.params["interface"].lower()
    direction = module.params["direction"].lower()

    proposed = dict(name=name, interface=interface, direction=direction)

    existing = check_for_acl_int_present(module, name, interface, direction)

    cmds = []
    commands = []
    if state == "present":
        if not existing:
            command = apply_acl(proposed)
            if command:
                commands.append(command)

    elif state == "absent":
        if existing:
            command = remove_acl(proposed)
            if command:
                commands.append(command)

    if commands:
        cmds = flatten_list(commands)
        if cmds:
            if module.check_mode:
                module.exit_json(changed=True, commands=cmds)
            else:
                load_config(module, cmds)
                results["changed"] = True
                if "configure" in cmds:
                    cmds.pop(0)
    else:
        cmds = []

    results["commands"] = cmds

    module.exit_json(**results)


if __name__ == "__main__":
    main()
