#!/usr/bin/python
# -*- coding: utf-8 -*-

# (c) 2017, Ansible by Red Hat, inc
#
# This file is part of Ansible by Red Hat
#
# 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/>.
#

ANSIBLE_METADATA = {'metadata_version': '1.1',
                    'status': ['preview'],
                    'supported_by': 'network'}


DOCUMENTATION = """
---
module: vyos_lldp
version_added: "2.4"
author: "Ricardo Carrillo Cruz (@rcarrillocruz)"
short_description: Manage LLDP configuration on VyOS network devices
description:
  - This module provides declarative management of LLDP service
    on VyOS network devices.
notes:
  - Tested against VYOS 1.1.7
options:
  state:
    description:
      - State of the LLDP configuration.
    default: present
    choices: ['present', 'absent']
"""

EXAMPLES = """
- name: Enable LLDP service
  vyos_lldp:
    state: present

- name: Disable LLDP service
  vyos_lldp:
    state: absent
"""

RETURN = """
commands:
  description: The list of configuration mode commands to send to the device
  returned: always, except for the platforms that use Netconf transport to manage the device.
  type: list
  sample:
    - set service lldp
"""
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.vyos import get_config, load_config
from ansible.module_utils.vyos import vyos_argument_spec, check_args


def has_lldp(module):
    config = get_config(module).splitlines()

    if "set service 'lldp'" in config or 'set service lldp' in config:
        return True
    else:
        return False


def main():
    """ main entry point for module execution
    """
    argument_spec = dict(
        interfaces=dict(type='list'),
        state=dict(default='present',
                   choices=['present', 'absent',
                            'enabled', 'disabled'])
    )

    argument_spec.update(vyos_argument_spec)

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

    warnings = list()
    check_args(module, warnings)

    result = {'changed': False}

    if warnings:
        result['warnings'] = warnings

    HAS_LLDP = has_lldp(module)

    commands = []

    if module.params['state'] == 'absent' and HAS_LLDP:
        commands.append('delete service lldp')
    elif module.params['state'] == 'present' and not HAS_LLDP:
        commands.append('set service lldp')

    result['commands'] = commands

    if commands:
        commit = not module.check_mode
        load_config(module, commands, commit=commit)
        result['changed'] = True

    module.exit_json(**result)

if __name__ == '__main__':
    main()
