#!/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': '1.0',
                    'status': ['preview'],
                    'supported_by': 'core'}


DOCUMENTATION = """
---
module: junos_vlan
version_added: "2.4"
author: "Ganesh Nalawade (@ganeshrn)"
short_description: Manage VLANs on Juniper JUNOS network devices
description:
  - This module provides declarative management of VLANs
    on Juniper JUNOS network devices.
options:
  name:
    description:
      - Name of the VLAN.
    required: true
  vlan_id:
    description:
      - ID of the VLAN.
    required: true
  description:
    description:
      - Text description of VLANs.
  interfaces:
    description:
      - List of interfaces to check the VLAN has been
        configured correctly.
  collection:
    description: List of VLANs definitions.
  purge:
    description:
      - Purge VLANs not defined in the collections parameter.
    default: no
  state:
    description:
      - State of the VLAN configuration.
    default: present
    choices: ['present', 'absent']
  active:
    description:
      - Specifies whether or not the configuration is active or deactivated
    default: True
    choices: [True, False]
requirements:
  - ncclient (>=v0.5.2)
notes:
  - This module requires the netconf system service be enabled on
    the remote device being managed
"""

EXAMPLES = """
- name: configure VLAN ID and name
  junos_vlan:
    vlan_name: test
    vlan_id: 20
    name: test-vlan

- name: remove VLAN configuration
  junos_vlan:
    vlan_name: test
    state: absent

- name: deactive VLAN configuration
  junos_vlan:
    vlan_name: test
    state: present
    active: False

- name: activate VLAN configuration
  junos_vlan:
    vlan_name: test
    state: present
    active: True
"""

RETURN = """
diff:
  description: Configuration difference before and after applying change.
  returned: when configuration is changed.
  type: string
  sample: >
         [edit vlans]
         +   test-vlan-1 {
         +       vlan-id 60;
         +   }
"""
import collections

from ansible.module_utils.junos import junos_argument_spec, check_args
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.junos import load_config, map_params_to_obj, map_obj_to_ele

try:
    from lxml.etree import tostring
except ImportError:
    from xml.etree.ElementTree import tostring

USE_PERSISTENT_CONNECTION = True


def validate_vlan_id(value, module):
    if not 1 <= value <= 4094:
        module.fail_json(msg='vlan_id must be between 1 and 4094')


def validate_param_values(module, obj):
    for key in obj:
        # validate the param value (if validator func exists)
        validator = globals().get('validate_%s' % key)
        if callable(validator):
            validator(module.params.get(key), module)


def main():
    """ main entry point for module execution
    """
    argument_spec = dict(
        name=dict(required=True),
        vlan_id=dict(required=True, type='int'),
        description=dict(),
        interfaces=dict(),
        collection=dict(),
        purge=dict(default=False, type='bool'),
        state=dict(default='present', choices=['present', 'absent']),
        active=dict(default=True, type='bool')
    )

    argument_spec.update(junos_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

    top = 'vlans/vlan'

    param_to_xpath_map = collections.OrderedDict()
    param_to_xpath_map.update([
        ('name', {'xpath': 'name', 'is_key': True}),
        ('vlan_id', 'vlan-id'),
        ('description', 'description')
    ])

    validate_param_values(module, param_to_xpath_map)

    want = list()
    want.append(map_params_to_obj(module, param_to_xpath_map))
    ele = map_obj_to_ele(module, want, top)

    kwargs = {'commit': not module.check_mode}
    kwargs['action'] = 'replace'

    diff = load_config(module, tostring(ele), warnings, **kwargs)

    if diff:
        result.update({
            'changed': True,
            'diff': diff,
        })

    module.exit_json(**result)

if __name__ == "__main__":
    main()