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

# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function
__metaclass__ = type

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

DOCUMENTATION = r'''
---
module: aci_vrf
short_description: Manage contexts or VRFs (fv:Ctx)
description:
- Manage contexts or VRFs on Cisco ACI fabrics.
- Each context is a private network associated to a tenant, i.e. VRF.
notes:
- The C(tenant) used must exist before using this module in your playbook.
  The M(aci_tenant) module can be used for this.
- More information about the internal APIC class B(fv:Ctx) from
  L(the APIC Management Information Model reference,https://developer.cisco.com/docs/apic-mim-ref/).
author:
- Jacob McGill (@jmcgill298)
version_added: '2.4'
options:
  tenant:
    description:
    - The name of the Tenant the VRF should belong to.
    aliases: [ tenant_name ]
  vrf:
    description:
    - The name of the VRF.
    aliases: [ context, name, vrf_name ]
  policy_control_direction:
    description:
    - Determines if the policy should be enforced by the fabric on ingress or egress.
    choices: [ egress, ingress ]
  policy_control_preference:
    description:
    - Determines if the fabric should enforce contract policies to allow routing and packet forwarding.
    choices: [ enforced, unenforced ]
  description:
    description:
    - The description for the VRF.
    aliases: [ descr ]
  state:
    description:
    - Use C(present) or C(absent) for adding or removing.
    - Use C(query) for listing an object or multiple objects.
    choices: [ absent, present, query ]
    default: present
extends_documentation_fragment: aci
'''

EXAMPLES = r'''
- name: Add a new VRF to a tenant
  aci_vrf:
    host: apic
    username: admin
    password: SomeSecretPassword
    vrf: vrf_lab
    tenant: lab_tenant
    descr: Lab VRF
    policy_control_preference: enforced
    policy_control_direction: ingress
    state: present
  delegate_to: localhost

- name: Remove a VRF for a tenant
  aci_vrf:
    host: apic
    username: admin
    password: SomeSecretPassword
    vrf: vrf_lab
    tenant: lab_tenant
    state: absent
  delegate_to: localhost

- name: Query a VRF of a tenant
  aci_vrf:
    host: apic
    username: admin
    password: SomeSecretPassword
    vrf: vrf_lab
    tenant: lab_tenant
    state: query
  delegate_to: localhost
  register: query_result

- name: Query all VRFs
  aci_vrf:
    host: apic
    username: admin
    password: SomeSecretPassword
    state: query
  delegate_to: localhost
  register: query_result
'''

RETURN = r'''
current:
  description: The existing configuration from the APIC after the module has finished
  returned: success
  type: list
  sample:
    [
        {
            "fvTenant": {
                "attributes": {
                    "descr": "Production environment",
                    "dn": "uni/tn-production",
                    "name": "production",
                    "nameAlias": "",
                    "ownerKey": "",
                    "ownerTag": ""
                }
            }
        }
    ]
error:
  description: The error information as returned from the APIC
  returned: failure
  type: dict
  sample:
    {
        "code": "122",
        "text": "unknown managed object class foo"
    }
raw:
  description: The raw output returned by the APIC REST API (xml or json)
  returned: parse error
  type: string
  sample: '<?xml version="1.0" encoding="UTF-8"?><imdata totalCount="1"><error code="122" text="unknown managed object class foo"/></imdata>'
sent:
  description: The actual/minimal configuration pushed to the APIC
  returned: info
  type: list
  sample:
    {
        "fvTenant": {
            "attributes": {
                "descr": "Production environment"
            }
        }
    }
previous:
  description: The original configuration from the APIC before the module has started
  returned: info
  type: list
  sample:
    [
        {
            "fvTenant": {
                "attributes": {
                    "descr": "Production",
                    "dn": "uni/tn-production",
                    "name": "production",
                    "nameAlias": "",
                    "ownerKey": "",
                    "ownerTag": ""
                }
            }
        }
    ]
proposed:
  description: The assembled configuration from the user-provided parameters
  returned: info
  type: dict
  sample:
    {
        "fvTenant": {
            "attributes": {
                "descr": "Production environment",
                "name": "production"
            }
        }
    }
filter_string:
  description: The filter string used for the request
  returned: failure or debug
  type: string
  sample: ?rsp-prop-include=config-only
method:
  description: The HTTP method used for the request to the APIC
  returned: failure or debug
  type: string
  sample: POST
response:
  description: The HTTP response from the APIC
  returned: failure or debug
  type: string
  sample: OK (30 bytes)
status:
  description: The HTTP status from the APIC
  returned: failure or debug
  type: int
  sample: 200
url:
  description: The HTTP url used for the request to the APIC
  returned: failure or debug
  type: string
  sample: https://10.11.12.13/api/mo/uni/tn-production.json
'''

from ansible.module_utils.network.aci.aci import ACIModule, aci_argument_spec
from ansible.module_utils.basic import AnsibleModule


def main():
    argument_spec = aci_argument_spec()
    argument_spec.update(
        description=dict(type='str', aliases=['descr']),
        policy_control_direction=dict(choices=['ingress', 'egress'], type='str'),
        policy_control_preference=dict(choices=['enforced', 'unenforced'], type='str'),
        state=dict(choices=['absent', 'present', 'query'], type='str', default='present'),
        tenant=dict(type='str', required=False, aliases=['tenant_name']),  # Not required for querying all objects
        vrf=dict(type='str', required=False, aliases=['context', 'name', 'vrf_name']),  # Not required for querying all objects
    )

    module = AnsibleModule(
        argument_spec=argument_spec,
        supports_check_mode=True,
        required_if=[
            ['state', 'absent', ['tenant', 'vrf']],
            ['state', 'present', ['tenant', 'vrf']],
        ],
    )

    description = module.params['description']
    policy_control_direction = module.params['policy_control_direction']
    policy_control_preference = module.params['policy_control_preference']
    state = module.params['state']
    tenant = module.params['tenant']
    vrf = module.params['vrf']

    aci = ACIModule(module)
    aci.construct_url(
        root_class=dict(
            aci_class='fvTenant',
            aci_rn='tn-{0}'.format(tenant),
            module_object=tenant,
            target_filter={'name': tenant},
        ),
        subclass_1=dict(
            aci_class='fvCtx',
            aci_rn='ctx-{0}'.format(vrf),
            module_object=vrf,
            target_filter={'name': vrf},
        ),
    )

    aci.get_existing()

    if state == 'present':
        aci.payload(
            aci_class='fvCtx',
            class_config=dict(
                descr=description,
                pcEnfDir=policy_control_direction,
                pcEnfPref=policy_control_preference,
                name=vrf,
            ),
        )

        aci.get_diff(aci_class='fvCtx')

        aci.post_config()

    elif state == 'absent':
        aci.delete_config()

    aci.exit_json()


if __name__ == "__main__":
    main()
